- Added new constants LANG_SESSION_NAME and LANG_SESSION_INDEXES to constants.php

- Added new function getPhraseByLanguage to helpers/hlp_language_helper.php

application/config/constants.php

@@ -58,6 +58,14 @@ define('AUTH_INVALID_CREDENTIALS',	2);
 define('LDAP_NO_USER_DN',			10);
 define('LDAP_TOO_MANY_USER_DN',		11);
 
+/*
+|--------------------------------------------------------------------------
+| Language constants
+|--------------------------------------------------------------------------
+*/
+define('LANG_SESSION_NAME', 'LANGUAGE');
+define('LANG_SESSION_INDEXES', 'LANGUAGE_INDEXES');
+
 /*
 |--------------------------------------------------------------------------
 | File and directory modes

application/helpers/hlp_language_helper.php

@@ -13,7 +13,7 @@
 if (! defined('BASEPATH')) exit('No direct script access allowed');
 
 // ------------------------------------------------------------------------
-// Functions needed to manage the user language preference
+// Functions needed to manage multi lingual contents
 // ------------------------------------------------------------------------
 
 /**
@@ -44,3 +44,59 @@ function getUserLanguage($language = null)
 
 	return $language;
 }
+
+/**
+ * Function to retrieve a phrase from an array of phrases (same phrase in more languages) using the given language as parameter
+ * The given $phraseLanguagesArray parameter contains more translations of the same phrase
+ * $language parameter contains the language used to get the phrase
+ * The first time this function is called an array, that has the language as its key and the language index as its value,
+ * is retrived from database and then stored in the user session.
+ * All subsequent calls retrieves this array from the session itself.
+ */
+function getPhraseByLanguage($phraseLanguagesArray, $language)
+{
+	$phrase = null;
+	$ci =& get_instance(); // get CI instance
+
+	// Try to get the language session
+	$langArray = getSessionElement(LANG_SESSION_NAME, LANG_SESSION_INDEXES);
+	if ($langArray == null) // If not already loaded in session
+	{
+		// Loads the Sprache_model to retrieve the language settings from the DB
+		// NOTE: Stores the loaded model with the alias SpracheModelLanguage to avoid to overwrite
+		// 		an already loaded SpracheModel used somewhere else
+		$ci->load->model('system/Sprache_model', 'SpracheModelLanguage');
+
+		// Add order clause by index and select only the sprache column
+		$ci->SpracheModelLanguage->addOrder('index');
+		$ci->SpracheModelLanguage->addSelect('sprache');
+
+		// Retrieves from public.tbl_sprache
+		$dbLanguages = $ci->SpracheModelLanguage->load();
+		if (hasData($dbLanguages)) // If everything is ok and contains data
+		{
+			$index = 0; // Incremental integer
+			$languageIndexes = array(); // Array that will contains languages and their indexes
+
+			// Loops through database results
+			foreach (getData($dbLanguages) as $dbLanguage)
+			{
+				$languageIndexes[$dbLanguage->sprache] = $index++; // set $languageIndexes array elements
+			}
+		}
+
+		$langArray = $languageIndexes; // copy $languageIndexes to $langArray
+		// Set session element $_SESSION['LANG']['LANG_INDEXES'] with $languageIndexes
+		setSessionElement(LANG_SESSION_NAME, LANG_SESSION_INDEXES, $langArray);
+	}
+
+	// Checks to avoid ugly php error messages
+	if (!isEmptyArray($phraseLanguagesArray) && !isEmptyArray($langArray)
+		&& isset($langArray[$language]) && isset($phraseLanguagesArray[$langArray[$language]]))
+	{
+		// If everything is ok then set phrase
+		$phrase = $phraseLanguagesArray[$langArray[$language]];
+	}
+
+	return $phrase;
+}

application/models/system/Sprache_model.php

@@ -1,7 +1,7 @@
 <?php
+
 class Sprache_model extends DB_Model
 {
-
 	/**
 	 * Constructor
 	 */