Store, Constants: renamed constant for error code

README.md: short installation instructions.

README.md

-===============
-Doc: https://wikiit.math.uzh.ch/it/projekt/qfq/qfq-jqwidgets
\ No newline at end of file
+QFQ: Typo3 Extbase Extension
+===============================
+
+Version: see `extension/ext_emconf.php`
+
+Installation
+------------
+* Take care that the `php5-mysqlnd` driver is installed:
+* The following functions are used and are only available with the native driver:
+         mysqli::get_result (important),
+         mysqli::fetch_all (nice to have)
+* See also: http://dev.mysql.com/downloads/connector/php-mysqlnd/
+* If there is a error message "Call to undefined method mysqli_stmt::get_result()", `php5-mysqlnd` is not installed or not active.
+
+* Ubuntu:
+
+    sudo apt-get install php5-mysqlnd
+    sudo php5enmod mysqlnd
+    sudo service apache2 restart
+
+* Install extension as regular.
+* In `typo3conf/ext/qfq` rename `config.examle.ini` to `config.ini`.
+* Fill `config.ini` with valid database credentials.
+* Insert a new content record of type `qfq`.
+* As a test, insert: `sql1 = SELECT 'Hello World'`. View the page in browser.
+
+Usage
+-----
+* https://wikiit.math.uzh.ch/it/projekt/qfq/qfq-jqwidgets
+

extension/qfq/qfq/Constants.php

@@ -74,7 +74,6 @@ const ERROR_SIP_MALFORMED = 1005;
 const ERROR_SIP_INVALID = 1006;
 //const ERROR_MISSING_FORM_NAME = 1007;
 const ERROR_IN_SQL_STATEMENT = 1008;
-const ERROR_READ_FILE = 1009;
 const ERROR_MISSING_SESSIONNAME = 1010;
 const ERROR_BROKEN_PARAMETER = 1011;
 const ERROR_FE_USER_UID_CHANGED = 1012;
@@ -115,6 +114,11 @@ const ERROR_MISSING_FORMELEMENT = 1049;
 const ERROR_STORE_VALUE_ALREADY_CODPIED = 1100;
 const ERROR_STORE_KEY_EXIST = 1101;
 
+// I/O Error
+const ERROR_IO_READ_FILE = 1200;
+const ERROR_IO_WRITE = 1203;
+const ERROR_IO_OPEN = 1204;
+
 // KeyValueParser
 const ERROR_KVP_VALUE_HAS_NO_KEY = 1900;
 
@@ -197,6 +201,7 @@ const SYSTEM_DBPW = 'DBPW';
 const SYSTEM_DB = 'DB';
 const SYSTEM_TESTDB = 'TESTDB';
 const SYSTEM_SESSIONNAME = 'SESSIONNAME';
+const SYSTEM_SQL_LOG = 'SQLLOG'; //  Logging to file
 // Information for: Log / Debug / Exception
 const SYSTEM_SQL_RAW = 'sqlRaw';  // Type: SANATIZE_ALL / String. SQL Query (before substitute). Useful for error reporting.
 const SYSTEM_SQL_FINAL = 'sqlFinal'; //  Type: SANATIZE_ALL / String. SQL Query (after substitute). Useful for error reporting.

extension/qfq/qfq/store/Store.php

@@ -158,7 +158,7 @@ class Store {
             //TODO: sinnvollen Platz fuer qfq.ini bestimmen. In der Installationsdoku erwaehnen.
             $config = parse_ini_file(__DIR__ . '/../../../' . CONFIG_INI, false);
         } catch (\Exception $e) {
-            throw new qfq\UserException ("Error read file " . CONFIG_INI . ": " . $e->getMessage(), ERROR_READ_FILE);
+            throw new qfq\UserException ("Error read file " . CONFIG_INI . ": " . $e->getMessage(), ERROR_IO_READ_FILE);
         }
         self::setVarArray($config, STORE_SYSTEM, true);
     }