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.. ==================================================
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.. Header hierarchy
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.. ==
..  --
..   ^^
..    ''
..     ;;
..      ,,
..
.. --------------------------------------------------
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.. Best Practice T3 reST  https://docs.typo3.org/typo3cms/drafts/github/xperseguers/RstPrimer/
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.. External Links: `Bootstrap <http://getbootstrap.com/>`_:
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.. Add Images: https://wiki.typo3.org/ReST_Syntax#Images ...
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..
.. -*- coding: utf-8 -*- with BOM.


.. include:: Includes.txt

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.. _general:

General
=======

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* Project homepage: https://qfq.io
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* Latest releases: https://qfq.io/download
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* Development: https://git.math.uzh.ch/typo3/qfq
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* Slack: https://qfq-io.slack.com
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.. _installation:

Installation
============

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The following features are only tested / supported on linux hosts:
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* General: QFQ is coded to run on Linux hosts, preferable on Debian derivates like Ubuntu.
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* HTML to PDF conversion - command `wkhtmltopdf`.
* Concatenation of PDF files - command `pdftk`.
* Mime type detection for uploads - command `file`.

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.. _`preparation`:

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Preparation
-----------

Report & Form
^^^^^^^^^^^^^

In PHP 5.x the QFQ extension needs  the PHP MySQL native driver. The following functions are used and are only available with the
native driver (see also: http://dev.mysql.com/downloads/connector/php-mysqlnd/):

* mysqli::get_result (important),
* mysqli::fetch_all (nice to use)

To normalize UTF8 input, the *php5-intl* resp. *php7.0-intl* package is needed by

* normalizer::normalize()

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For the `download`_ function, the programs `pdftk` and `file` are necessary to concatenate PDF files.
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Preparation for Ubuntu 14.04::

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  sudo apt-get install php5-mysqlnd php5-intl
  sudo apt-get install pdftk file                  # for file upload and PDF
  sudo apt-get install inkscape imagemagick     # to render thumbnails
  sudo php5enmod mysqlnd
  sudo service apache2 restart
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Preparation for Ubuntu 16.04::
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  sudo apt install php7.0-intl
  sudo apt install pdftk libxrender1 file pdf2svg  # for file upload, PDF and 'HTML to PDF' (wkhtmltopdf), PDF split
  sudo apt install inkscape imagemagick            # to render thumbnails
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.. _wkhtml:
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wkhtmltopdf
^^^^^^^^^^^
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`wkhtmltopdf <http://wkhtmltopdf.org/>`_ will be used by QFQ to offer 'website print' and 'HTML to PDF' conversion.
The program is not included in QFQ and has to be manually installed.
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* The Ubuntu package `wkhtmltopdf` needs a running Xserver - this does not work on a headless webserver.

  * Best is to install the QT version from the named website above.
  * In case of trouble with wkhtmltopdf, also install 'libxrender1'.
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  * The current version 0.12.4 might have trouble with https connections. Version 0.12.5-dev (github master branch)
    seems more reliable. Please contact the QFQ authors if you need a compiled Ubuntu version of wkhtmltopdf.
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In `configuration`_ specify the: ::
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    cmdWkhtmltopdf=/opt/wkhtmltox/bin/wkhtmltopdf`.
    baseUrl=http://www.example.com/`.
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If wkhtml has been compiled with dedicated libraries (not part of LD_LIBRARY_PATH), specify the LD_LIBRARY_PATH together
with the path-filename: ::
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    cmdWkhtmltopdf=LD_LIBRARY_PATH=/opt/wkhtmltox/lib /opt/wkhtmltox/bin/wkhtmltopdf
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**Important**: To access FE_GROUP protected pages or content, it's necessary to disable the `[FE][lockIP]` check! `wkhtml`
will access the Typo3 page locally (localhost) and that IP address is different from the client (=user) IP.
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Configure via Typo3 Installtool `All configuration > $TYPO3_CONF_VARS['FE']`: ::
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   [FE][lockIP] = 0

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**Warning**: this disables an important anti-'session hijacking' protection. The security level of the whole installation
will be *lowered*! Again, this is only needed if `wkhtml` needs access to FE_GROUP protected pages & content. As an
alternative to lower the security level, create a separated page subtree which is only accessible (configured via
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Typoscript) from specific IPs **or** if a FE-User is logged in.
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If there are problems with converting/downloading FE_GROUP protected pages, check `SHOW_DEBUG_INFO = download` to debug.

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**Important**: Converting HTML to PDF gives no error message but RC=-1? Check carefully all includes of CSS, JS, images
and so on! Typically some of them fails to load and wkhtml stops running!


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HTML to PDF conversion
''''''''''''''''''''''

`wkhtmltopdf` converts a website (local or remote) to a (multi)-page PDF file. It's mainly used in `download`_.

Print
'''''

Different browser prints the same page in different variations. To prevent this, QFQ implements a small PHP wrapper
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`print.php` with uses `wkhtmltopdf` to convert HTML to PDF.
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Provide a `print this page`-link (replace 'current pageId' )::
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  <a href="typo3conf/ext/qfq/Source/api/print.php?id={current pageId}">Print this page</a>
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Any parameter specified after `print.php` will be delivered to `wkhtmltopdf` as part of the URL.

Typoscript code to implement a print link on every page::

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  10 = TEXT
  10 {
    wrap = <a href="typo3conf/ext/qfq/Source/api/print.php?id=|&type=99"><span class="glyphicon glyphicon-print" aria-hidden="true"></span> Printview</a>
    data = page:uid
  }
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Send Email
^^^^^^^^^^

QFQ sends mail via `sendEmail` http://caspian.dotconf.net/menu/Software/SendEmail/ - a small perl script without a central
configuration.

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By default, `sendEmail` uses the local installed MTA, writes a logfile to `fileadmin/protected/log/mail.log` and handles attachments
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via commandline options. A basic HTML email support is implemented.

The latest version is v1.56, which has at least one bug. That one is patched in the QFQ internal version v1.56p1 (see
QFQ GIT sources in directory 'patches/sendEmail.patch').

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Nevertheless, on latest system the TLS support is broken - please check sendEmailProblem_.
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The Typo3 sendmail eco-system is not used at all by QFQ.

Thumbnail
^^^^^^^^^

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Thumbnails will be rendered via ImageMagick (https://www.imagemagick.org/) 'convert' and 'inkscape' (https://inkscape.org).
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'inkscape' is only used for '.svg' files.

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The Typo3 graphic eco-system is not used at all by QFQ.
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Usage: `column-thumbnail`_.

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Setup
-----

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* Install the extension via the Extension Manager.
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  * If you install the extension by manual download/upload and get an error message
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    "can't activate extension": rename the downloaded zip file to `qfq.zip` or `qfq_<version>.zip` (e.g. version: 18.12.0).
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  * If the Extension Manager stops after importing: check your memory limit in php.ini.
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* Copy/rename the file *<site path>/typo3conf/ext/qfq/config.example.qfq.php* to *<site path>/typo3conf/config.qfq.php*.
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  Configure the necessary settings `configuration`_
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  The configuration file is outside of the extension directory, to not loose it during de-install and install again.
* When the QFQ Extension is called the first time on the Typo3 frontend, the file *<ext_dir>/qfq/sql/formEditor.sql* will
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  played and fills the database with the *Form editor* records. This also happens automatically after each update of QFQ.
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* Configure Typoscript to include Bootstrap, jQuery, QFQ javascript and CSS files.

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.. _setup-css-js:

Setup CSS & JS
^^^^^^^^^^^^^^
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::

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    page.meta {
        X-UA-Compatible = IE=edge
        X-UA-Compatible.attribute = http-equiv
        viewport=width=device-width, initial-scale=1
    }

    page.includeCSS {
        file01 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap.min.css
        file02 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap-theme.min.css
        file03 = typo3conf/ext/qfq/Resources/Public/Css/jqx.base.css
        file04 = typo3conf/ext/qfq/Resources/Public/Css/jqx.bootstrap.css
        file05 = typo3conf/ext/qfq/Resources/Public/Css/qfq-bs.css
        file06 = typo3conf/ext/qfq/Resources/Public/Css/tablesorter-bootstrap.css
    }

    page.includeJS {
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        file01 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.min.js
        file02 = typo3conf/ext/qfq/Resources/Public/JavaScript/bootstrap.min.js
        file03 = typo3conf/ext/qfq/Resources/Public/JavaScript/validator.min.js
        file04 = typo3conf/ext/qfq/Resources/Public/JavaScript/jqx-all.js
        file05 = typo3conf/ext/qfq/Resources/Public/JavaScript/globalize.js
        file06 = typo3conf/ext/qfq/Resources/Public/JavaScript/tinymce.min.js
        file07 = typo3conf/ext/qfq/Resources/Public/JavaScript/EventEmitter.min.js
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        file08 = typo3conf/ext/qfq/Resources/Public/JavaScript/typeahead.bundle.min.js
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        file09 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.min.js
        file10 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.tablesorter.combined.min.js
        file11 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.tablesorter.pager.min.js
        file12 = typo3conf/ext/qfq/Resources/Public/JavaScript/widget-columnSelector.min.js
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        # Only needed in case FormElement 'annotate' is used.
        file20 = typo3conf/ext/qfq/Resources/Public/JavaScript/fabric.min.js
        file21 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.fabric.min.js
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    }
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.. _form-editor:
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FormEditor
----------
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Setup a *report* to manage all *forms*:

* Create a Typo3 page.
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* Set the 'URL Alias' to `form` (default) or the individual defined value in parameter `editFormPage` (configuration_).
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* Insert a content record of type *qfq*.
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* In the bodytext insert the following code: ::
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    # If there is a form given by SIP: show
    form={{form:SE}}
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    # In case indexQfq is different from indexData, set indexQfq.
    dbIndex = {{indexQfq:Y}}
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    10 {
        # List of Forms: Do not show this list of forms if there is a form given by SIP.
        # Table header.
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        sql = SELECT CONCAT('p:{{pageAlias:T}}&form=form') as _pagen, '#', 'Name', 'Title', 'Table', '' FROM (SELECT 1) AS fake WHERE '{{form:SE}}'=''
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        head = {{'b|p:id={{pageAlias:T}}&form=copyFormFromExt|t:Copy form from ExtForm' AS _link}}
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               <table class="table table-hover qfq-table-50 tablesorter tablesorter-filter">
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        tail = </table>
        rbeg = <thead><tr>
        rend = </tr></thead>
        fbeg = <th>
        fend = </th>
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        10 {
            # All forms
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            sql = SELECT CONCAT('p:{{pageAlias:T}}&form=form&r=', f.id) as _pagee
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                         , f.id, f.name, f.title, f.tableName
                         , CONCAT('U:form=form&r=', f.id) as _paged
                      FROM Form AS f
                      ORDER BY f.name
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            rbeg = <tr>
            rend = </tr>
            fbeg = <td>
            fend = </td>
        }
    }
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.. _install-checklist:

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Installation: Check List
------------------------
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* Protect the directory `<T3 installation>/fileadmin/protected` in Apache against direct file access.

  * `<T3 installation>/fileadmin/protected/` should be used for confidential (uploaded / generated) data.
  * `<T3 installation>/fileadmin/protected/log/...` is the default place for QFQ logfiles.

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* Protect the directory `<T3 installation>/fileadmin` in Apache to not execute PHP Scripts - malicious uploads won't be executed.
* Setup a log rotation rule for `sqlLog`.
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* Check that `sqlLogMode` is set to `modify` on productive sites. With `none` you have no chance to find out who changed
  which data and `all` really logs a mass of data.
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.. _configuration:

Configuration
-------------

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.. _config-qfq-php:

config.qfq.php
^^^^^^^^^^^^^^

+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Keyword                       | Example                                               | Description                                                                |
+===============================+=======================================================+============================================================================+
| DB_<n>_USER                   | DB_1_USER=qfqUser                                     | Credentials configured in MySQL                                            |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_PASSWORD               | DB_1_PASSWORD=1234567890                              | Credentials configured in MySQL                                            |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_SERVER                 | DB_1_SERVER=localhost                                 | Hostname of MySQL Server                                                   |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| DB_<n>_NAME                   | DB_1_NAME=qfq_db                                      | Database name                                                              |
+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
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| LDAP_1_RDN                    | LDAP_1_RDN='ou=Admin,ou=example,dc=com'               | Credentials for non-anonymous LDAP access. Only one set supported.         |
| LDAP_1_PASSWORD               | LDAP_1_PASSWORD='mySecurePassword'                    |                                                                            |
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+-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+


Example: *typo3conf/config.qfq.php*: ::

    <?php

    // QFQ configuration
    //
    // Save this file as: <site path>/typo3conf/config.qfq.php

    return [
        'DB_1_USER' => '<DBUSER>',
        'DB_1_SERVER' => '<DBSERVER>',
        'DB_1_PASSWORD' => '<DBPW>',
        'DB_1_NAME' => '<DB>',

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        //DB_2_USER => <DBUSER>
        //DB_2_SERVER => <DBSERVER>
        //DB_2_PASSWORD => <DBPW>
        //DB_2_NAME => <DB>
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        // DB_n ...
        // ...

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        // LDAP_1_RDN => 'ou=Admin,ou=example,dc=com'
        // LDAP_1_PASSWORD => 'mySecurePassword'
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    ];

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.. _extension-manager-qfq-configuration:

Extension Manager: QFQ Configuration
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Keyword                           | Default / Example                                     | Description                                                                |
+===================================+=======================================================+============================================================================+
| Config                                                                                                                                                                 |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| documentation                     | http://docs.typo3.org...                              | Link to the online documentation of QFQ. Every QFQ installation also       |
|                                   |                                                       | contains a local copy: typo3conf/ext/qfq/Documentation/html/Manual.html    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| flagProduction                    | yes                                                   | yes|no: used to differentiate production and development site.             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| thumbnailDirSecure                | fileadmin/protected/qfqThumbnail                      | Important: secure directory 'protected' (recursive) against direct access. |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| thumbnailDirPublic                | typo3temp/qfqThumbnail                                | Both thumbnail directories will be created if not existing.                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdInkscape                       | inkscape                                              | If inkscape is not available, specify an empty string.                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdConvert                        | convert                                               | GraphicsMagics 'convert' is recommended.                                   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cmdWkhtmltopdf                    | /usr/bin/wkhtmltopdf                                  | PathFilename of wkhtmltopdf. Optional variables like LD_LIBRARY_PATH=...   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| baseUrl                           | http://example.com                                    | URL where wkhtmltopdf will fetch the HTML (no parameter, those comes later)|
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sendEMailOptions                  | -o tls=yes                                            | General options. Check: http://caspian.dotconf.net/menu/Software/SendEmail |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| dateFormat                        | yyyy-mm-dd                                            | Possible options: yyyy-mm-dd, dd.mm.yyyy.                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Dynamic                                                                                                                                                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| fillStoreSystemBySql1/2/3         | SELECT s.id AS ...                                    | Specific values read from the database to fill the system store during QFQ |
|                                   |                                                       | load. See `fillStoreSystemBySql`_ for a usecase.                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| fillStoreSystemBySqlErrorMsg1/2/3 | No current period found                               | Only define an error message, if QFQ should stop running                   |
|                                   |                                                       | in case of an SQL error or not exact one record.                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Debug                                                                                                                                                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| throwExceptionGeneralError        | auto                                                  | | *yes*: 'general errors' in QFQ (PHP) will throw an exception.            |
|                                   |                                                       | | *auto*: becomes 'yes', if 'flagProduction'!='yes', else 'no'.            |
|                                   |                                                       | | *no*: 'general errors' in QFQ (PHP) will be silently ignored.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formSubmitLogMode                 | all                                                   | | *all*: every form submission will be logged.                             |
|                                   |                                                       | | *none*: no logging.                                                      |
|                                   |                                                       | | See `Form Submit Log page`_ for example QFQ code to display the log.     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| redirectAllMailTo                 | john@doe.com                                          | If set, redirect all QFQ generated mails (Form, Report) to the specified.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sqlLogMode                        | modify                                                | | *all*: every statement will be logged - this might a lot.                |
|                                   |                                                       | | *modify*: log only statements who change data. *error*: log only         |
|                                   |                                                       |   DB errors.                                                               |
|                                   |                                                       | | *none*: no SQL log at all.                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sqlLog                            | fileadmin/protected/log/sql.log                       | Filename to log SQL commands: relative to <site path> or absolute. If the  |
|                                   |                                                       | directory does not exist, create it.                                       |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| qfqLog                            | fileadmin/protected/log/qfq.log                       | Filename to log general QFQ events:relative to <site path> or absolute.    |
|                                   |                                                       | If the directory does not exist, create it.                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| mailLog                           | fileadmin/protected/log/mail.log                      | Filename to log `sendEmail` commands: relative to <site path> or absolute. |
|                                   |                                                       | If the directory does not exist, create it.                                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| showDebugInfo                     | auto                                                  | FE - Possible values: yes|no|auto|download. For 'auto': If a BE User is    |
|                                   |                                                       | logged in, a debug information will be shown on the FE.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Database                                                                                                                                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| init                              | init=SET names utf8; SET sql_mode =                   | Global init for using the database. For 'sql_mode="NO_ENGINE_SUBSTITUTION"'|
|                                   | "NO_ENGINE_SUBSTITUTION"                              | see #7407.                                                                 |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| update                            | auto                                                  | | *auto*: apply DB Updates only if there is a newer version.               |
|                                   |                                                       | | *always*: apply DB Updates always, especially play formEditor.sql every  |
|                                   |                                                       |   time QFQ is called - *not* recommended!                                  |
|                                   |                                                       | | *never*: never apply DB Updates.                                         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| indexData                         | 1                                                     | Optional. Default: 1. Retrieve the current setting via {{dbNameData:Y}}.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| indexQfq                          | 1                                                     | Optional. Default: 1. Retrieve the current setting via {{dbNameQfq:Y}}.    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Security                                                                                                                                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| escapeTypeDefault                 | m                                                     | All variables `{{...}}` get this escape class by default.                  |
|                                   |                                                       | See `variable-escape`_.                                                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityVarsHoneypot              | email,username,password                               | If empty: no check. All named variables will rendered as INPUT elements.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityAttackDelay               | 5                                                     | If an attack is detected, sleep 'x' seconds and exit PHP process.          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityShowMessage               | true                                                  | If an attack is detected, show a message.                                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| securityGetMaxLength              | 50                                                    | GET vars longer than 'x' chars triggers an `attack-recognized`.            |
|                                   |                                                       | `ExceptionMaxLength`_.                                                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
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| securityFailedAuthDelay           | 3                                                     | If authorization fails, sleep 'x' seconds before answering the request.    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
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| Form-Config                                                                                                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| recordLockTimeoutSeconds          | 900                                                   | Timeout for record locking. After this time, a record will be replaced.    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| sessionTimeoutSeconds             | 1800                                                  | Timeout for FE User session. See sessionTimeoutSeconds_                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| enterAsSubmit                     | enterAsSubmit = 1                                     | 0: off, 1: Pressing *enter* in a form means *save* and *close*.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| editFormPage                      | form                                                  | T3 Pagealias to edit a form.                                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataPatternError              | please check pattern error                            | Customizable error message used in validator.js. 'pattern' violation.      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataRequiredError             | missing value                                         | Customizable error message used in validator.js. 'required' fields.        |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataMatchError                | type error                                            | Customizable error message used in validator.js. 'match' retype mismatch.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formDataError                     | generic error                                         | Customizable error message used in validator.js. 'no specific' given.      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Form-Layout                                                                                                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| labelAlign                        | left                                                  | Label align (left/center/right)/ Default: left. Will be inherited to Form. |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqContainer              | container                                             | | QFQ with own Bootstrap: 'container'.                                     |
|                                   |                                                       | | QFQ already nested in Bootstrap of mainpage: <empty>.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqForm                   | qfq-color-base                                        | Wrap around QFQ 'Form'.                                                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqFormPill               | qfq-color-grey-1                                      | Wrap around title bar for pills: CSS Class, typically a background color.  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassQfqFormBody               | qfq-color-grey-2                                      | Wrap around FormElements: CSS Class, typically a background color.         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formBsColumns                     | col-md-12 col-lg-10                                   | The whole form will be wrapped. See `bs-custom-field-width`_               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formBsLabelColumns                | col-md-3 col-lg-3                                     | The column get the width. See `bs-custom-field-width`_                     |
+-----------------------------------+-------------------------------------------------------+                                                                            |
| formBsInputColumns                | col-md-6 col-lg-6                                     |                                                                            |
+-----------------------------------+-------------------------------------------------------+                                                                            |
| formBsNoteColumns                 | col-md-3 col-lg-3                                     |                                                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoInline             | <img src="info.png">                                  | Image for `extraButtonInfo`_ (inline).                                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoBelow              | <img src="info.png">                                  | Image for `extraButtonInfo`_ (below).                                      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoPosition           | below                                                 | 'auto' (default) or 'below'. See `extraButtonInfo`_.                       |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| extraButtonInfoClass              | pull-right                                            | '' (default) or 'pull-right'. See `extraButtonInfo`_.                      |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| Form-Language                                                                                                                                                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formLanguage[ABCD]Id              | -  E.g.: 1                                            | In Typo3 configured pageLanguage id. The number after the 'L' parameter.   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| formLanguage[ABCD]Label           | -  E.G.: english                                      | Label shown in *Form editor*, on the 'basic' tab.                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonText                    | -                                                     | Text on the form save button. Typically none.                              |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonTooltip                 | Save                                                  | Tooltip on the form save button.                                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonClass                   | btn btn-default navbar-btn                            | Bootstrap CSS class for save button on top of the form.                    |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonClassOnChange           | alert-info btn-info                                   | Bootstrap CSS class for save button showing 'data changed'.                |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| saveButtonGlyphIcon               | glyphicon-ok                                          | Icon for the form save button.                                             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonText                   | -                                                     | Text on the form close button. Typically none.                             |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonTooltip                | close                                                 | Tooltip on the form close button.                                          |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonClass                  | btn btn-default navbar-btn                            | Bootstrap CSS class for close button on top of the form.                   |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| closeButtonGlyphIcon              | glyphicon-remove                                      | Icon for the form close button.                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonText                  | -                                                     | Text on the form delete button. Typically none.                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonTooltip               | delete                                                | Tooltip on the form delete button.                                         |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonClass                 | btn btn-default navbar-btn                            | Bootstrap CSS class for delete button on top of the form.                  |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| deleteButtonGlyphIcon             | glyphicon-trash                                       | Icon for the form delete button.                                           |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonText                     | -                                                     | Text on the form new button. Typically none.                               |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonTooltip                  | new                                                   | Tooltip on the form new button.                                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonClass                    | btn btn-default navbar-btn                            | Bootstrap CSS class for new button on top of the form.                     |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| newButtonGlyphIcon                | glyphicon-plus                                        | Icon for the form new button.                                              |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| showIdInFormTitle                 | 0 (off), 1 (on)                                       | Append at the form title the current record id.                            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
| cssClassColumnId                  | text-muted                                            | A column in a subrecord with the name id|ID|Id gets this class.            |
+-----------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
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After parsing the configuration, the following variables will be set automatically in STORE_SYSTEM:
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+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
| Keyword                       | Description                                                                                                                        |
+===============================+====================================================================================================================================+
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| dbNameData                    | Name of the 'data'-database. '{{dbNameData:Y}}                                                                                     |
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+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
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| dbNameQfq                     | Name of the 'QFQ'-database. '{{dbNameQfq:Y}}                                                                                       |
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+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
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| dbNameT3                      | Name of the 'T3'-database. '{{dbNameT3:Y}}                                                                                         |
+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
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| sitePath                      | Absolute path of the current T3 instance. '{{sitePath:Y}}                                                                          |
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+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
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| extPath                       | Absolute path of the QFQ extension. '{{extPath:Y}}                                                                                 |
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+-------------------------------+------------------------------------------------------------------------------------------------------------------------------------+
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.. _`CustomVariables`:

Custom variables
^^^^^^^^^^^^^^^^
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Up to 30 custom variables can be defined in `configuration`_.
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E.g. to setup a contact address and reuse the information inside your installation do: ::
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   custom1: ADMINISTRATIVE_CONTACT = john@doe.com
   custom2: ADMINISTRATIVE_ADDRESS = John Doe, Hollywood Blvd. 1, L.A.
   custom3: ADMINISTRATIVE_NAME = John Doe
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 * Somewhere in a `Form` or in `Report`::

      {{ADMINISTRATIVE_CONTACT:Y}}, {{ADMINISTRATIVE_ADDRESS:Y}}, {{ADMINISTRATIVE_NAME}}

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It's also possible to configure such variables directly in `config.qfq.php`_.

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.. _`fillStoreSystemBySql`:
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Fill STORE_SYSTEM by SQL
^^^^^^^^^^^^^^^^^^^^^^^^
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A specified SELECT statement in `configuration`_ in variable `fillStoreSystemBySql1` (or `2`,
or `3`) will be fired. The query should have 0 (nothing happens) or 1 row. All columns will be
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**added** to the existing STORE_SYSTEM. Existing variables will be overwritten. Be careful not to overwrite system values.
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This option is useful to make generic custom values, saved in the database, accessible to all QFQ Report and Forms.
Access such variables via `{{<varname>:Y}}`.

In case QFQ should stop working if a given query does not select exact one record (e.g. a missing period), define an
error message: ::

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  fillStoreSystemBySql1: SELECT name FROM Person WHERE name='Doe'
  fillStoreSystemBySqlErrorMsg1: Too many or to few "Doe's" in our database
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.. _`periodId`:
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periodId
''''''''

This is

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* a usecase, implemented via `fillStoreSystemBySql`_,
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* a way to access `Period.id` with respect to the current period (the period itself is custom defined).
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After a full QFQ installation:
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* a table `Period` (extend / change it to your needs, fill them with your periods),
* one sample record in table `Period`,

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Websites, delivering semester data, school year schedules, or any other type or periods, often need an index to the
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*current* period.
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In configuration_: ::
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  fillStoreSystemBySql1: SELECT id AS periodId FROM Period WHERE start<=NOW() ORDER BY start DESC LIMIT 1
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a variable 'periodId' will automatically computed and filled in STORE SYSTEM. Access it via `{{periodId:Y0}}`.
To get the name and current period: ::

  SELECT name, ' / ', start FROM Period WHERE id={{periodId:Y0}}

Typically, it's necessary to offer a 'previous' / 'next' link. In this example, the STORE SIP holds the new periodId: ::

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  SELECT CONCAT('p:{{pageAlias:T}}&periodId=', {{periodId:SY0}}-1, '|Next') AS _page, ' ', name, ' ', CONCAT('p:{{pageAlias:T}}&periodId=', {{periodId:SY0}}+1, '|Next') AS _page FROM Period AS s WHERE s.id={{periodId:SY0}}
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Take care for minimum and maximum indexes (do not render the links if out of range).

.. _`DbUserPrivileges`:
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DB USER privileges
^^^^^^^^^^^^^^^^^^

The specified DB User needs privileges to the database of at least: SELECT / INSERT / UPDATE / DELETE / SHOW.

To apply automatically QFQ-'DB UPDATE' the following rights are mandatory too: CREATE / ALTER

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To get access to the Typo3 installation, 'dbuser' should also have access to the Typo3 Database with at least SELECT / INSERT / UPDATE / DELETE.
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.. _`ExceptionMaxLength`:

Exception for SECURITY_GET_MAX_LENGTH
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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If it is necessary to use a GET variable which exceeds `securityGetMaxLength` limit, name the variable with '_<num>' at
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the end. E.g. `my_long_variable_130`. Such a variable has an allowed length of 130 chars. Access the variable as
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usual with the variable name: `{{my_long_variable_130:C:...}}`.


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.. _`sessionTimeoutSeconds`:

FE-User: Session timeout seconds
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

There is no timeout for website users who are not logged in (but typically those users don't have access to protected content).

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For logged in users, the default timeout is the php.ini settings for `session.cookie_lifetime` and `session.gc_maxlifetime`
(minimum of both). These timeout only affects QFQ related content and can be
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specified a) globally (QFQ configuration) and b) specific per Form.

The maximum timeout depends on the minimal value of php.ini `session.cookie_lifetime` and `session.gc_maxlifetime`.
Specifying a higher value produces an error in the front end.

Every access to QFQ related content resets the timeout.

After FE login, the next access to QFQ related content starts the timeout counter.

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.. _local-documentation:

Local Documentation
-------------------

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A HTML rendered version is available under: <your site>/typo3conf/ext/qfq/Documentation/html/Index.html
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If you get a 'Page forbidden / not found' there might be some Webserver restrictions. E.g. the Typo3 example of `.htaccess`
in the Typo3 installation folder will forbid access to any extension documentation (which is a good idea on a productive
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server). For a development server instead, deactivate the forbid rule of 'documentation'. In `.htaccess` (snippet from
Typo3 7.6 _.htaccess): ::
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  production:   RewriteRule (?:typo3conf/ext|typo3/sysext|typo3/ext)/[^/]+/(?:Configuration|Resources/Private|Tests?|Documentation|docs?)/ - [F]
  development:  RewriteRule (?:typo3conf/ext|typo3/sysext|typo3/ext)/[^/]+/(?:Configuration|Resources/Private|Tests?|docs?)/ - [F]
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.. _concept:

Concept
=======

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SIPs
----

The following is a technical background information. Not needed to just use QFQ.

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The SIPs (=Server Id Pairs) are uniq timestamps, created/registered on the fly for a specific browser session (=user). Every SIP is
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registered on the server (= stored in a browser session) and contains one or more key/value pairs. The key/value pairs never leave
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the server. The SIPs will be used:

* to protect values not to be spoofed by anyone,
* to protect values not to be altered by anyone,
* to grant access, e.g.:

  * load and save forms,
  * upload files,
  * download files,
  * PHP AJAX pages.

SIPs becomes invalid, as soon as the current browser session is destroyed. The client (= user) can't manipulate the content
of SIPs - it's only possible to reuse already registered SIPs by the user, who already owns the session.
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Access privileges
-----------------

The Typo3 FE Groups can be used to implement access privileges. Such groups are assigned to
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* Typo3 FE users,
* Typo3 pages,
* and/or Typo3 content records (e.g. QFQ records).

This will be used for general page structure privileges.

A `record base` privileges controlling (e.g. which user can edit
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which person record) will be implicit configured, by the way that records are viewable / editable (or not) through
SQL in the specific QFQ tt-content statements.
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Typo3 QFQ content element
-------------------------

Insert one or more QFQ content elements on a Typo3 page. Specify column and language per content record as wished.

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The title of the QFQ content element will not be rendered on the frontend. It's only visible to the webmaster in the
backend for orientation.
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QFQ Keywords (Bodytext)
^^^^^^^^^^^^^^^^^^^^^^^

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**All of the named parameter are optional.**

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 +-------------------+---------------------------------------------------------------------------------+
 | Name              | Explanation                                                                     |
 +===================+=================================================================================+
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 | form              | | Formname.                                                                     |
 |                   | | Static: **form = person**                                                     |
 |                   | | By SIP: **form = {{form:SE}}**                                                |
 |                   | | By SQL: **form = {{SELECT c.form FROM config AS c WHERE c.id={{a:C}} }}**     |
 +-------------------+---------------------------------------------------------------------------------+
 | r                 | | <record id>. The form will load the record with the specified id.             |
 |                   | | Static: **r = 123**                                                           |
 |                   | | By SQL: **r = {{SELECT ...}}**                                                |
 |                   | | If not specified, the SIP parameter 'r' is used.                              |
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 +-------------------+---------------------------------------------------------------------------------+
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 | dbIndex           | E.g. `dbIndex = {{indexQfq:Y}}` Select a DB index. Only necessary if a          |
 |                   | different than the standard DB should be used.                                  |
 +-------------------+---------------------------------------------------------------------------------+
 | debugShowBodyText | If='1' and configuration_:*showDebugInfo: yes*, shows a tooltip with bodytext   |
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 +-------------------+---------------------------------------------------------------------------------+
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 | sqlLog            | Overwrites configuration_: `SQL_LOG`_ . Only affects `Report`, not `Form`.      |
 +-------------------+---------------------------------------------------------------------------------+
 | sqlLogMode        | Overwrites configuration_: `SQL_LOG_MODE`_ . Only affects `Report`, not `Form`. |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fbeg      | Start token for every field (=column)                                           |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fend      | End token for every field (=column)                                             |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.shead     | Static start token for whole <level>, independent if records are selected       |
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 |                   | Shown before `head`.                                                            |
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 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.stail     | Static end token for whole <level>, independent if records are selected.        |
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 |                   | Shown after `tail`.                                                             |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.head      | Dynamic start token for whole <level>. Only if at least one record is select.   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.tail      | Dynamic end token for whole <level>. Only if at least one record is select.     |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rbeg      | Start token for row.                                                            |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.rbgd      | Alternating (per row) token.                                                    |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rend      | End token for row. Will be rendered **before** subsequent levels are processed  |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.renr      | End token for row. Will be rendered **after** subsequent levels are processed   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rsep      | Seperator token between rows                                                    |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fsep      | Seperator token between fields (=columns)                                       |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.sql       | SQL Query                                                                       |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.althead   | If <level>.sql is empty, these token will be rendered.                          |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.altsql    | If <level>.sql is empty, these query will be fired. No sub queries.             |
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 |                   | Shown after `althead`                                                           |
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 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.content   | | *show* (default): content of current and sub level are directly shown.        |
 |                   | | *hide*: content of current and sub levels are stored and not shown.           |
 |                   | | *store*: content of current and sub levels are stored and shown.              |
 |                   | | To retrieve the content: `{{<level>.line.content}}`. See `syntax-of-report`_  |
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 +-------------------+---------------------------------------------------------------------------------+
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.. _`qfq-database`:

QFQ Database
------------

Recommended setup for Typo3 & QFQ Installation is with *two* databases. One for the Typo3 installation and one for QFQ.
A good practice is to name both databases equal, appending the suffix '_t3' and '_db'.

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When QFQ is called, it checks for QFQ system tables. If they do not exist or have a lower version than the installed QFQ
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version, the system tables will be automatically installed or updated.

.. _`system-tables`:

System tables
^^^^^^^^^^^^^

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+---------------+------------+------------+
| Name          | Use        | Database   |
+===============+============+============+
| Clipboard     | Temporary  | QFQ        |
+---------------+------------+------------+
| Cron          | Persistent | QFQ        |
+---------------+------------+------------+
| Dirty         | Temporary  | QFQ | Data |
+---------------+------------+------------+
| Form          | Persistent | QFQ        |
+---------------+------------+------------+
| FormElement   | Persistent | QFQ        |
+---------------+------------+------------+
| FormSubmitLog | Persistent | QFQ | Data |
+---------------+------------+------------+
| MailLog       | Persistent | QFQ | Data |
+---------------+------------+------------+
| Period        | Persistent | Data       |
+---------------+------------+------------+
| Split         | Persistent | Data       |
+---------------+------------+------------+

See `Mail Log page`_ and `Form Submit Log page`_ for some Frontend views for these tables.
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* Check Bug #5459 - support of system tables in different DBs not supported.
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.. _`multi-database`:

Multi Database
^^^^^^^^^^^^^^
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Base: T3 & QFQ
''''''''''''''
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QFQ typically interacts with one database, the QFQ database. The database used by Typo3 is typically a separate one.
Theoretically it might be the same (never tested), but it's strongly recommended to use a separated QFQ database to have
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no problems on Typo3 updates and to have a clean separation between Typo3 and QFQ.
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QFQ: System & Data
''''''''''''''''''

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QFQ itself can be separated in 'QFQ system' (see `system-tables`_) and 'QFQ data' databases (even more than one are
possible). The 'QFQ system' stores the forms, record locking, log tables and so on - `QFQ data` is for the rest.
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A `Multi Database` setup is given, if 'QFQ system' is different from 'QFQ data'.

Data: Data1, Data2, ..., Data n
'''''''''''''''''''''''''''''''

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`QFQ data` might switch between different 'data'-databases. In configuration_ one main `QFQ data` index will be specified
in `indexQfq`. If specific forms or reports should use a different database than that, `dbIndex` might change
`indexData` temporarily.
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`dbIndex`: A `Report` (field `dbIndex`) as well as a `Form` (field `parameter`.`dbIndex`) can operate on a specific database.
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A `Form` will:

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* load the form-definition from `indexQfq` (table `Form` and `FormElement`),
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* loads and save data from/in `indexData` (config.qfq.php) / `dbIndex` (form.parameter.dbIndex),
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* retrieve extra information via `dbIndexExtra` - this is useful to offer information from a database and save them in a
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The simplest setup, QFQ system & data in the same database, needs no `indexQfq / indexData` definition in
configuration_ or one or both of them set to '1'
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To separate QFQ system and data, indexQfq and indexData will have different indexes.
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A Multi Database setup might be useful for:

* several independent Typo3 QFQ installations (each have it's own form repository) and one central database, or
* one QFQ installation which should display / load /save records from different databases, or
* a combination of the above two.
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Note:
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* Option 'A' is the most simple and commonly used.
* Option 'B' separate the T3 and QFQ databases on two database hosts.
* Option 'C' is like 'B' but with a shared 'QFQ data'-database between three 'Typo3 / QFQ' instances.
* Further variants are possible.

+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
|   | Domain         | Website Host | T3                            | QFQ system                   | QFQ data                         |
+===+================+==============+===============================+==============================+==================================+
| A | standalone.edu | 'w'          | <dbHost>, <dbname>_t3, <dbnameSingle>_db                                                        |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB1.edu      | 'wApp'       | <dbHostApp>, <dbnameB1>_t3    | <dbHostB1>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB2.edu      | 'wApp'       | <dbHostApp>, <dbnameB2>_t3    | <dbHostB2>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC1.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC1>_t3   | <dbHostC>, <dbnameSysC1>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC2.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC2>_t3   | <dbHostC>, <dbnameSysC2>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC3.edu      | 'wAppC3'     | <dbHostAppC3>, <dbnameC3>_t3  | <dbHostC3>, <dbnameSysC3>_db | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+

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`DB_1_USER`, `DB_1_SERVER`, `DB_1_PASSWORD`, `DB_1_NAME`. The number '1' indicates the `dbIndex`. Increment the number
to specify further database credential setups.

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Different QFQ versions, shared database
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

When using different QFQ versions and a shared 'QFQ data'-database, there is some risk of conflicting
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'QFQ system' tables. Best is to always use the same QFQ version on all instances or use a Multi Database setup.
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.. _debug:

Debug
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=====

SQL Logging
-----------
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configuration_
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.. _SQL_LOG:

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* *sqlLog*
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  * Filename where to log SQL queries and statistical data.
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  * File is relative to the `<site path>` or absolute (starting with '/').
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  * Content: SQL queries and timestamp, formName/formId, fe_user, success, affected rows, newly created record
    id's and accessed from IP.
  * The global setting can be overwritten by defining `sqlLog` inside of a QFQ tt-content record.
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.. _SQL_LOG_MODE:

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* *sqlLogMode: all|modify|error|none*
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  * *all*: logs every SQL statement.
  * *modify*: logs only statements who might potentially change data.
  * *error*: logs only queries which generate SQL errors.
  * *none*: no query logging at all.
  * The global setting can be overwritten by defining `sqlLogMode` inside of a QFQ tt-content record.

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* *showDebugInfo = [yes|no|auto],[download]*
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  If active, displays additional information in the Frontend (FE). This is typically helpful during development.
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  * *yes*:

    * Form:

      * For every internal link/button, show tooltips with decoded SIP on mouseover.
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      * Shows an 'Edit form'-button (wrench symbol) on a form. The link points to the T3 page with the :ref:`form-editor`.
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    * Report: Will be configured per tt-content record.

      *debugShowBodyText = 1*

  * *no*: No debug info.

  * *auto*: Depending if there is a Typo3 BE session, set internally:

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    * *showDebugInfo = yes*  (BE session exist)
    * *showDebugInfo = no*   (no BE session)
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  * *download*:

    * During a download (especially by using wkhtml), temporary files are not deleted automatically. Also the
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      `wkhtmltopdf` and `pdftk` commandlines will be logged to `SQL_LOG`_. Use this only to debug problems on download.
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.. _REDIRECT_ALL_MAIL_TO:

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Redirect all mail to (catch all)
--------------------------------

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configuration_
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* *redirectAllMailTo=john@doe.com*
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  * During the development, it might be helpful to configure a 'catch all' email address, which QFQ uses as the final receiver
    instead of the original intended one.

  * The setting will:

    * Replace the 'To' with the configured one.
    * Clear 'CC' and 'Bcc'
    * Write a note and the original configured receiver at the top of the email body.
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_`Mail Log page`

Mail Log page
-------------

For debugging purposes you may like to add a Mail Log page in the frontend.
The following QFQ code could be used for that purpose (put it in a QFQ PageContent element): ::

    # Page parameters
    1.sql = SELECT @grId := '{{grId:C0:digit}}' AS _grId
    2.sql = SELECT @summary := IF('{{summary:CE:alnumx}}' = 'true', 'true', 'false') AS _s

    # Filters
    10 {
      sql = SELECT gr.id, IF(gr.id = @grId, "' selected>", "'>"), gr.value, ' (Id: ', gr.id, ')'
               FROM gGroup AS gr
               INNER JOIN MailLog AS ml ON ml.grId = gr.id
               GROUP BY gr.id
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      head = <form onchange='this.submit();' class='form-inline'><input type='hidden' name='id' value='{{pageAlias:T0}}'>Filter By Group: <select name='grId' class='form-control'><option value=''></option>
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      rbeg = <option value='
      rend = </option>
      tail = </select>
    }
    20 {
      sql = SELECT IF(@summary = 'true', ' checked', '')
      head = <div class='checkbox'><label><input type='checkbox' name='summary' value='true'
      tail = >Summary</label></div></form>
    }

    # Mail Log
    50 {
      sql = SELECT id, '</td><td>', grId, '</td><td>', xId, '</td><td>',
                REPLACE(receiver, ',', '<br>'), '</td><td>', REPLACE(sender, ',', '<br>'), '</td><td>',
                DATE_FORMAT(modified, '%d.%m.%Y<br>%H:%i:%s'), '</td><td style="word-break:break-word;">',
                CONCAT('<b>', subject, '</b><br>', IF(@summary = 'true', CONCAT(SUBSTR(body, 1, LEAST(IF(INSTR(body, '\n') = 0, 50, INSTR(body, '\n')), IF(INSTR(body, '<br>') = 0, 50, INSTR(body, '<br>')))-1), ' ...'), CONCAT('<br>', REPLACE(body, '\n', '<br>'))) )
              FROM MailLog WHERE (grId = @grId OR @grId = 0)
              ORDER BY modified DESC
              LIMIT 100
      head = <table class="table table-condensed table-hover"><tr><th>Id</th><th>grId</th><th>xId</th><th>To</th><th>From</th><th>Date</th><th>E-Mail</th></tr>
      tail = </table>
      rbeg = <tr><td>
      rend = </td></tr>
    }

_`Form Submit Log page`

Form Submit Log page
--------------------

For debugging purposes you may like to add a Form Submit Log page in the frontend.
The following QFQ code could be used for that purpose (put it in a QFQ PageContent element): ::

    # Filters
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    20.shead = <form onchange='this.submit()' class='form-inline'><input type='hidden' name='id' value='{{pageAlias:T0}}'>
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    20 {
      sql = SELECT id, IF(id = '{{formId:SC0}}', "' selected>", "'>"), name
            FROM Form ORDER BY name
      head = <label for='formId'>Form:</label> <select name='formId' id='formId' class='form-control'><option value=0></option>
      tail = </select>
      rbeg = <option value='
      rend = </option>
    }
    30 {
      sql = SELECT feUser, IF(feUser = '{{feUser:SCE:alnumx}}', "' selected>", "'>"), feUser
            FROM FormSubmitLog GROUP BY feUser ORDER BY feUser
      head = <label for='feUser'>FE User:</label> <select name='feUser' id='feUser' class='form-control'><option value=''></option>
      tail = </select>
      rbeg = <option value='
      rend = </option>
    }
    30.stail = </form>

    # Show Log
    50 {
      sql = SELECT l.id,
          CONCAT('<b>Form</b>: ', f.name,
            '<br><b>Record Id</b>: ', l.recordId,
            '<br><b>Fe User</b>: ', l.feUser,
            '<br><b>Date</b>: ', l.created,
            '<br><b>Page Id</b>: ', l.pageId,
            '<br><b>Session Id</b>: ', l.sessionId,
            '<br><b>IP Address</b>: ', l.clientIp,
            '<br><b>User Agent</b>: ', l.userAgent,
            '<br><b>SIP Data</b>: <div style="margin-left:20px;">', "<script>var data = JSON.parse('", l.sipData,
              "'); for (var key in data) {
              document.write('<b>' + key + '</b>: ' + data[key] + '<br>'); }</script>", '</div>'),
          CONCAT("<script>var data = JSON.parse('", l.formData,
            "'); for (var key in data) {
              document.write('<b>' + key + '</b>: ' + data[key] + '<br>'); }</script>")
          FROM FormSubmitLog AS l
          LEFT JOIN Form AS f ON f.id = l.formId
          WHERE (l.formId = '{{formId:SC0}}' OR '{{formId:SC0}}' = 0)
            AND (l.feUser = '{{feUser:SCE:alnumx}}' OR '{{feUser:SCE:alnumx}}' = '')
          ORDER BY l.created DESC LIMIT 100
      head = <table class="table table-hover">
             <tr><th>Id</th><th style="min-width:250px;">Environment</th><th>Submitted Data</th>
      tail = </table>
      rbeg = <tr>
      renr = </tr>
      fbeg = <td>
      fend = </td>
    }

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.. _variables:

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Variable
========
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Variables in QFQ are surrounded by double curly braces. Four different types of variable substitution functionality is
provided. Access to:
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* `store-variables`_
* `sql-variables`_
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* `row-column-variables`_
* `link-column-variables`_
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Some examples, including nesting::
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  # Store
  #---------------------------------------------
  {{r}}
  {{index:FS}}
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  {{name:FS:alnumx:s:my default}}
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  # SQL
  #---------------------------------------------
  {{SELECT name FROM person WHERE id=1234}}
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  # Row columns
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  #---------------------------------------------
  {{10.pId}}
  {{10.20.pId}}
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  # Nesting
  #---------------------------------------------
  {{SELECT name FROM person WHERE id={{r}} }}
  {{SELECT name FROM person WHERE id={{key1:C:alnumx}} }} # explained below
  {{SELECT name FROM person WHERE id={{SELECT id FROM pf LIMIT 1}} }} # it's more efficient to use only one query
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  # Link Columns
  {{p:form=Person&r=1|t:Edit Person|E|s AS link}}
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  * *{{ SELECT "Hello World"   }}* becomes *{{SELECT "Hello World"}}*
  * *{{ varname   }}* becomes *{{varname}}*
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Types
-----
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.. _`store-variables`:
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Store variables
^^^^^^^^^^^^^^^
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Syntax:  *{{VarName[:<store(s)[:<sanitize class>[:<escape>[:<default value>[:type violate message]]]]]}}*

See also:

 * `store`_
 * `sanitize-class`_
 * `variable-escape`_
 * `variable-default`_
 * `variable-type-message-violate`_

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* Example::
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  {{pId}}
  {{pId:FSE}}
  {{pId:FSE:digit}}
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  {{pId::digit}}
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  {{name:FSE:alnumx:m}}
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  {{name::::John Doe}}
  {{name:FSE:alnumx:m:John Doe:forbidden characters}}
  {{name:::::forbidden characters}}
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* Zero or more stores might be specified to be searched for the given VarName.
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* If the VarName is not found and a default value is given, the default is returned.
* If no value is found, nothing is replaced - the string '{{<VarName>}}' remains.
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.. _`sanitize-class`:
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Sanitize class
--------------

Values in STORE_CLIENT *C* (Client=Browser) and STORE_FORM *F* (Form, HTTP 'post') are checked against a
sanitize class. Values from other stores are *not* checked against any sanitize class, even if a sanitize class is specified.

* Variables get by default the sanitize class defined in the corresponding `FormElement`. If not defined,
  the default class is 'digit'.
* A default sanitize class can be overwritten by individual definition: *{{a:C:alnumx}}*
* If a value violates the specific sanitize class, see `variable-type-message-violate`_ for default or customized message.
  By default the value becomes `!!<name of sanitize class>!!`. E.g. `!!digit!!`.

For QFQ variables and FormElements:

+------------------+------+-------+-----------------------------------------------------------------------------------------+
| Name             | Form | Query | Pattern                                                                                 |
+==================+======+=======+=========================================================================================+
| **alnumx**       | Form | Query | [A-Za-z][0-9]@-_.,;: /() ÀÈÌÒÙàèìòùÁÉÍÓÚÝáéíóúýÂÊÎÔÛâêîôûÃÑÕãñõÄËÏÖÜŸäëïöüÿç            |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **digit**        | Form | Query | [0-9]                                                                                   |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **numerical**    | Form | Query | [0-9.-+]                                                                                |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **allbut**       | Form | Query | All characters allowed, but not [ ]  { } % \ #. The used regexp: '^[^\[\]{}%\\#]+$',    |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **all**          | Form | Query | no sanitizing                                                                           |
+------------------+------+-------+-----------------------------------------------------------------------------------------+


Only in FormElement:

+------------------+------+-------+-------------------------------------------------------------------------------------------+
| **auto**         | Form |       | Only supported for FormElements. Most suitable checktype is dynamically evaluated based   |
|                  |      |       | on native column definition, the FormElement type, and other info. See below for details. |
+------------------+------+-------+-------------------------------------------------------------------------------------------+
| **email**        | Form | Query | [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}                                           |
+------------------+------+-------+-------------------------------------------------------------------------------------------+
| **pattern**      | Form |       | Compares the value against a regexp.                                                      |
+------------------+------+-------+-------------------------------------------------------------------------------------------+


Rules for CheckType Auto (by priority):

* TypeAheadSQL or TypeAheadLDAP defined: **alnumx**
* Table definition
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  * integer type: **digit**
  * floating point number: **numerical**
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* FE Type
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  * 'editor', 'text' and encode = 'specialchar': **all**
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* None of the above: **alnumx**


.. _`variable-escape`:

Escape
------

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To 'escape' a character typically means: a character, which have a special meaning/function, should not treated as a special
character.
E.g. a string is surrounded by single ticks '. If such a string should contain a single tick inside (like 'Miller's'),
the inside single tick has to be escaped. This is typically done by a backlash: 'Millers\\'s'.

QFQ offers different ways of escaping. Which of them to use, depends on the situation.

Especially variables used in SQL Statements might cause trouble when using: NUL (ASCII 0), \\n, \\r, \\, ', ", or Control-Z.

Additional there is the escape class 'p' (password hash) which is not 'escape' but hashing. It transforms the value of
the variable into a hash. The hash function is the one used by Typo3 to encrypt and salt a password. This is useful to
manipulate FE user passwords via QFQ. See `setFeUserPassword`_
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The following `escape` and `hashing` types are available:
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  * 'm' - `real_escape_string() <http://php.net/manual/en/mysqli.real-escape-string.php>`_ (m = mysql)
  * 'l' - LDAP search filter values: `ldap-escape() <http://php.net/manual/en/function.ldap-escape.php>`_ (LDAP_ESCAPE_FILTER).
  * 'L' - LDAP DN values. `ldap-escape() <http://php.net/manual/en/function.ldap-escape.php>`_ (LDAP_ESCAPE_DN).
  * 's' - Single ticks ' will be escaped against \\'.
  * 'd' - double ticks " will be escaped against \\".
  * 'C' - colon ':' will be escaped against \\:.
  * 'c' - config - the escape type configured in `configuration`_.
  * 'p' - password hashing: depends on the hashing type in the Typo3 installation, includes salting if configured.
  * ''  - the escape type configured in `configuration`_.
  * '-' - no escaping.
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* The `escape` type is defined by the fourth parameter of the variable. E.g.: `{{name:FE:alnumx:m}}` (m = mysql).
* It's possible to combine different `escape` types, they will be processed in the order given. E.g. `{{name:FE:alnumx:Ls}}` (L, s).
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* Escaping is typically necessary for all user supplied content, especially if they are processed via SQL or LDAP queries.
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* Be careful when escaping nested variables. Best is to escape **only** the most outer variable.
* In configuration_ a global `escapeTypeDefault` can be defined. The configured escape type applies to all substituted
  variables, who *do not* contain a *specific* escape type.
* Additionally a `defaultEscapeType` can be defined per `Form` (separate field in the *Form editor*). This overwrites the
  global definition of `configuration`. By default, every `Form.defaultEscapeType` = 'c' (=config), which means the setting
  in `configuration`_.
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* To suppress an escape type, define the `escape type` = '-' on the specific variable. E.g.: `{{name:FE:alnumx:-}}`.
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.. _`variable-default`:

Default
-------

* Any string can be given to define a default value.
* If a default value is given, it makes no sense to define more than one store: with a default value given, only the
  first store is considered.
* If the default value contains a ':', that one needs to be escaped by '\'.

.. _`variable-type-message-violate`:

Type message violate
--------------------

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If a value violates the sanitize class, instead of content on of the following texts will be set.
 * 'c' - The violated class will be set as content, surrounded by '!!'. E.g. '!!digit!!'. This is the default.
 * 'e' - Instead of the value an empty string will be set as content.
 * '0' - Instead of the value the string '0' will be set as content.
 * 'custom text ...' - Instead of the value the custom text will be set as content. If the text contains a ':', that one needs to
    be escaped by '\'. Check `variable-escape`_ qualifier 'C' to let QFQ do the colon escaping.
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.. _`sql-variables`:
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SQL variables
^^^^^^^^^^^^^
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* The detection of an SQL command is case *insensitive*.
* Leading  whitespace will be skipped.
* The following commands are interpreted as SQL commands:
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  * INSERT, UPDATE, DELETE, REPLACE, TRUNCATE
  * SHOW, DESCRIBE, EXPLAIN, SET
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* The number of variables inside an input field or a SQL statement is not limited.
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Result: string
''''''''''''''

A result of a SQL statement will be imploded over all: concat all columns of a row, concat all rows - there is no
glue string.

Result: row
'''''''''''

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result, specify those with an '!': ::

   {{!SELECT ...}}

This manual will specify the individual QFQ elements, who needs an array instead of a string. It's an error to return
a string where an array is needed and vice versa.

Database index
''''''''''''''

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braces. ::

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