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Notes / Best Practices for Coding
=================================

General
=======

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* Class QuickFormQuery is the main entry point called by:
  * T3 Extension 'QFQ': called once per tt_content-record. 'bodytext' will be transferred to class QuickFormQuery.
    * The 'bodytext' contains:
      * Report definiton: 10.sql=SELECT ...
      * Form definition (explizit): form=Person
      * <Empty>: do nothing
  * api/save.php: wrapper to receive AJAX post request and instantiate QuickFormQuery.
  * api/load.php: not implemented yet. 
    * Wrapper to receive AJAX get requests.
    * delivers data for jqw grid
    * delivers data for typeahed fields
    * delivers data for select list
    * delivers data for depended (user select/unselect former elements) form elements

LOAD
----
* When qfq starts, 
  * (Form) Looking for a formname at: 
    1. Typo3 Bodytext Element,
    2. For the 'SIP' ($_GET['s'])
    3. $_GET variables 'form' and 'r' (=recordId) - the parameter 'form' has to be allowed in 'Permit URL Parameter' of 
       the specified form. This means: load the form to check, if it is allowed to load the form!?
    * If a formname is found, the search stops and the specified form will be processed.
  * (Report)
    * Process all <number>.[<number.>].sql statements

* Access code variables:     
  * active/valid formname: [$this->store->setVar(SYSTEM_FORM, $formName, STORE_SYSTEM);]
  * SIP: [$this->store->getVar('form', STORE_SIP)]
  * All parameters from active SIP:  [$this->store->getStore(STORE_SIP)]
  * Check Contstants.php for known Store members
  
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* In QuickFormQuery.php the whole Form will be copied to $this->formSpec and depending on further processing, the elements are
available in $this->feNative and $this->feAction.
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  * The Form specificaton (table form) will be evaluated direct after loading.
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  * The FormElement specification will be evaluated later on in BuildForm*.php


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SAVE
----
* Via wrapper api/save.php
* SID must be supplied via FORM POST
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* The SID supplies the <formname> and the <recordid>
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* form.render: plain/table/bootstrap
  * Client will handle the response of save.php.
  * Optional redirection initiated by client.
  
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DELETE
------
* Via wrapper api/delete.php
* The element who should dissappear after successfull deleting: class=record
* Button:

  * class=record-delete
  * Button: data-sip={{SIP}}

* Three possible variants with delete links:
  
   * Form: main record
   * HTML Code:
   
     <button id="delete-button" type="button" class="btn btn-default navbar-btn" ><span class="glyphicon glyphicon-trash"></span></button>
   
   * Form: subrecord, one delete button per record 
   * Report: typially inside a table, but maybe different.
   * HTML Code:
   
     <button type="button" class="record-delete" data-sip={{SIP}} ><span class="glyphicon glyphicon-trash"></span></button>

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USER INTERFACE
==============

Button status
-------------
* Form modified:
  * Buttons enabled: Save, Close, New, Delete
  * Button disable: -
  
* Form not modified:
  * Buttons enabled: Close, New, Delete
  * Button disabled: Save

Save Button 
-----------
* User presses the button
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  * Reset all validation states
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  * Form is submitted to server
    * Success: 
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       * Show message provided by server
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       * Current formelements and data will be reloaded.
       * Process server reponse 'redirect':
           * 'client': No redirect.
           * 'no': No redirect.
           * 'url': Redirect to URL
    * Failure: Happens on communication errors, if data validation fails, form actions fails or saving data fails. 
       * Show error message.
       * Client: Ignore server reponse 'redirect'. Client stays on current page.
    

Close Button
------------
* User presses the button
  * Form not modified by user: Client redirects to previous page.
  * Form modified by user: Ask User 'You have unsaved changes. Do you want to close?'
    * Yes: Client redirects to previous page.
    * No: Client stays on current page.
    * Save & Close: 
      * Client submits form to server.
      * Success: Process server response 'redirect':
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        * 'client': Client shows previous page.
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        * 'no': No redirect.
        * 'url': Redirect to URL
      * Failure: Happens on communication errors, if data validation fails, form actions fails or saving data fails. 
        * Show error message. 
        * Client: No redirect. Ignore server reponse 'redirect'.

Delete Button: Main record
--------------------------
* User presses the button. Ask User 'Do you really want to delete the record?
  * Yes: 
    * Delete record on server.
    * Process server reponse 'redirect':
      * 'client': Client redirects to previous page.
      * 'no': Error message.
      * 'url': Redirect to URL
  * No:
    * Client does not delete record on server.
    * No redirect. Client stays on current page.

New Button
----------
* User presses the button
  * Form not modified by user: Client redirects to href url.
  * Form modified by user: Ask User 'You have unsaved changes. Do you want to save first?'
    * Yes:
      * Form is submitted to server
        * Success:
          * Client: Ignore server reponse 'redirect'. Client redirects to href url.
        * Failure: Happens on communication errors, if data validation fails, form actions fails or saving data fails. 
           * Show error message.
           * Client: Ignore server reponse 'redirect'. Client stays on current page.
    * No: 
      * Client does not save the modified record.
      * Client redirects to href url.
    * Cancel:
      * Client does not save the modified record.
      * Client stays on current page.
  
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Debug / Log / Errormessages
===========================

* Before firing a SQL or doing processing of an FormElement, set some debugging / error variables:

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    [src] $this->store->setVar(SYSTEM_SQL_RAW, STORE_SYSTEM)
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* Available fields:
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    <code>
    SYSTEM_SQL_RAW
    SYSTEM_SQL_FINAL
    SYSTEM_SQL_COUNT
    SYSTEM_SQL_PARAM_ARRAY
    SYSTEM_FORM = CLIENT_FORM;                        // '<formName> / <formId>'
    SYSTEM_FORM_ELEMENT = 'formElement';              // '<formElementName> / <formElementeId>'
    SYSTEM_FORM_ELEMENT_COLUMN = 'formElementColumn'; // '<columnname of current processed formElement>'
    </code>
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* Form.debugShowInfo: yes|no will display a tooltip near beside every formelement and show parse/evaluate as tooltip.

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* Check to display debug info:
 
    $this->store->getVar(SYSTEM_SHOW_DEBUG_INFO, STORE_SYSTEM) === 'yes'

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Stores
======

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* Retrieve 'get' or 'post' variables by:
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[src] $values = $this->store->getStore(STORE_CLIENT)



Primary Table
=============
* For the primary table all informations are available in STORE_TABLE_DEFAULT and STORE_TABLE_COLUMN_TYPES.
* Get all columns of the primary table by

[src] array_keys($this->getStore(STORE_TABLE_COLUMN_TYPES))

* Get the recent record in STORE_RECORD and the parent record (multiforms) in STORE_PARENT_RECORD.

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Typo3
=====
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* PageId: $this->store->getVar(TYPO3_PAGE_ID, STORE_TYPO3)
  * Based on: $GLOBALS["TSFE"]->id   current Page
 
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* $GLOBALS["TSFE"]->fe_user->user["uid"]   fe_user_uid

* https://wiki.typo3.org/Extbase_HowTos
  * Old: $this->cObj->data['bodytext']
  * New:
        $contentObject = $this->configurationManager->getContentObject();
        $configuration = $contentObject->data['bodytext'];

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* Verzeichnisstruktur Extension: https://docs.typo3.org/typo3cms/CoreApiReference/ExtensionArchitecture/FilesAndLocations/Index.html
* http://api.typo3.org/
  * http://api.typo3.org/typo3cms/62/html/index.html
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* https://docs.typo3.org/typo3cms/CoreApiReference/Introduction/Index.html

SIP
===
Page loaded: www.example.com?index.php&id=start&s=badcaffee1234&type=2&L=3, with $_SESSION['badcaffee1234'] => 'form=Person&r=1'

* $_SESSION[$sip] => <urlparam>  >> $_SESSION['badcaffee1234'] => 'form=Person&r=1'
* $_SESSION[$urlparam] => <sip>  >> $_SESSION['form=Person&r=1'] => 'badcaffee1234'
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FormElement
===========

Checkbox
--------

    <div class="checkbox">
        <label>
            <input type="checkbox">label 1
        </label>
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    </div>