From c17d953cecf69d55491c49ba643dc178aa5acc0d Mon Sep 17 00:00:00 2001
From: Christian <christian1827@gmail.com>
Date: Wed, 12 Jan 2022 16:55:54 -0500
Subject: [PATCH] Course - Add extra field to manage multiple languages for a
 course - BT#19559

---
 main/admin/course_add.php   | 10 ++++++++++
 main/admin/course_edit.php  | 11 +++++++++++
 main/inc/global.inc.php     | 20 ++++++++++++++++++++
 main/inc/lib/course.lib.php | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 74 insertions(+)

diff --git a/main/admin/course_add.php b/main/admin/course_add.php
index 3a7bf784ed..ec2ec28b95 100755
--- a/main/admin/course_add.php
+++ b/main/admin/course_add.php
@@ -195,6 +195,16 @@ $obj->fill_grade_model_select_in_form($form);
 $extra_field = new ExtraField('course');
 $extra = $extra_field->addElements($form);
 
+if (api_get_configuration_value('allow_course_multiple_languages')) {
+    // Course Multiple language.
+    $cbMultiLanguage = $form->getElementByName('extra_multiple_language');
+    if (isset($cbMultiLanguage)) {
+        foreach ($languages['folder'] as $langFolder) {
+            $cbMultiLanguage->addOption($langFolder, $langFolder);
+        }
+    }
+}
+
 $htmlHeadXtra[] = '
 <script>
 
diff --git a/main/admin/course_edit.php b/main/admin/course_edit.php
index 3a39fe4855..12fc1851d9 100755
--- a/main/admin/course_edit.php
+++ b/main/admin/course_edit.php
@@ -320,6 +320,17 @@ $extra = $extra_field->addElements(
     true
 );
 
+if (api_get_configuration_value('allow_course_multiple_languages')) {
+    // Course Multiple language.
+    $languages = api_get_languages();
+    $cbMultiLanguage = $form->getElementByName('extra_multiple_language');
+    if (isset($cbMultiLanguage)) {
+        foreach ($languages['folder'] as $langFolder) {
+            $cbMultiLanguage->addOption($langFolder, $langFolder);
+        }
+    }
+}
+
 if (api_get_configuration_value('multiple_access_url_show_shared_course_marker')) {
     $urls = UrlManager::get_access_url_from_course($courseId);
     $urlToString = '';
diff --git a/main/inc/global.inc.php b/main/inc/global.inc.php
index 5c7b4c57bd..c2a2a2e0d3 100755
--- a/main/inc/global.inc.php
+++ b/main/inc/global.inc.php
@@ -488,6 +488,11 @@ if (!empty($valid_languages)) {
         }
     }
 
+    $courseLanguages = [];
+    if (isset($_course['real_id'])) {
+        $courseLanguages = CourseManager::getCourseMultiLanguageList($_course['real_id']);
+    }
+
     // If language is set via browser ignore the priority
     if (isset($_GET['language'])) {
         $language_interface = $user_language;
@@ -551,6 +556,21 @@ $language_interface_initial_value = $language_interface;
  */
 $languageFilesToLoad = api_get_language_files_to_load($language_interface);
 
+// It adds the langs with course selected multilanguages
+$courseLanguagesFilesToLoad = [];
+if (!empty($courseLanguages)) {
+    foreach ($courseLanguages as $courseLanguage) {
+        $fileToLoad = api_get_language_files_to_load($courseLanguage);
+        if (!empty($fileToLoad)) {
+            $courseLanguagesFilesToLoad = array_merge($courseLanguagesFilesToLoad, $fileToLoad);
+        }
+    }
+}
+if (!empty($courseLanguagesFilesToLoad)) {
+    $languageFilesToLoad = array_merge($languageFilesToLoad, $courseLanguagesFilesToLoad);
+    $languageFilesToLoad = array_unique($languageFilesToLoad);
+}
+
 foreach ($languageFilesToLoad as $languageFile) {
     include $languageFile;
 }
diff --git a/main/inc/lib/course.lib.php b/main/inc/lib/course.lib.php
index 3fb3d7c660..a7d7f7c8bb 100755
--- a/main/inc/lib/course.lib.php
+++ b/main/inc/lib/course.lib.php
@@ -2912,6 +2912,39 @@ class CourseManager
         }
     }
 
+    public static function getCourseMultiLanguageList($cid)
+    {
+        if (!api_get_configuration_value('allow_course_multiple_languages')) {
+            return false;
+        }
+
+        $tblCourseField = Database::get_main_table(TABLE_EXTRA_FIELD);
+        $tblCourseFieldValue = Database::get_main_table(TABLE_EXTRA_FIELD_VALUES);
+
+        $extraFieldType = EntityExtraField::COURSE_FIELD_TYPE;
+        // Set the return list
+        $courseLanguageList = [];
+
+        // Get special course field
+        $sql = "SELECT id FROM $tblCourseField
+                WHERE extra_field_type = $extraFieldType AND variable = 'multiple_language'";
+        $rs = Database::query($sql);
+        if (Database::num_rows($rs) > 0) {
+            $fieldId = Database::result($rs, 0, 0);
+            $sql = "SELECT value
+                    FROM $tblCourseFieldValue
+                    WHERE field_id = ".$fieldId." AND item_id = '".$cid."'";
+            $result = Database::query($sql);
+            while ($row = Database::fetch_assoc($result)) {
+                if (!empty($row['value'])) {
+                    $courseLanguageList = explode(';', $row['value']);
+                }
+            }
+        }
+
+        return $courseLanguageList;
+    }
+
     /**
      * Get the list of course IDs with the special_course field
      * set to 1. This function is access_url aware.