From 1bce02bd33274c9956ba19cd7e170bdfd43ec1a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Borja=20S=C3=A1nchez?=
 <114572427+BorjaSanchezBeezNest@users.noreply.github.com>
Date: Tue, 18 Oct 2022 10:02:43 +0200
Subject: [PATCH] Language: Change course language to platform language when
 disabling language used by course - refs #4418

Author: @BorjaSanchezBeezNest
---
 main/admin/languages.php            |  7 ++++---
 main/inc/lib/course.lib.php         | 19 +++++++++++++++++++
 main/inc/lib/sub_language.class.php | 14 +++++++++++---
 3 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/main/admin/languages.php b/main/admin/languages.php
index d666fe4465..e625d93b56 100755
--- a/main/admin/languages.php
+++ b/main/admin/languages.php
@@ -137,7 +137,7 @@ $htmlHeadXtra[] = '<script>
                 var action = datos.split(":")[0];
                 if (action && action == "confirm") {
                     var id = datos.split(":")[1];
-                    var sure = "<div class=\"warning-message alert alert-warning\">'.get_lang('ThereAreUsersUsingThisLanguageYouWantToDisableThisLanguageAndSetUsersWithTheDefaultPortalLanguage').'<br /><br /><a href=\"languages.php?action=make_unavailable_confirmed&id="+id+"\" class=\"btn btn-default\"><em class=\"fa fa-eye\"></em> '.get_lang('MakeUnavailable').'</a></div>";
+                    var sure = "<div class=\"warning-message alert alert-warning\">'.get_lang('ThereAreUsersOrCoursesUsingThisLanguageYouWantToDisableThisLanguageAndSetUsersAndCoursesWithTheDefaultPortalLanguage').'<br /><br /><a href=\"languages.php?action=make_unavailable_confirmed&id="+id+"\" class=\"btn btn-default\"><em class=\"fa fa-eye\"></em> '.get_lang('MakeUnavailable').'</a></div>";
                     $("#id_content_message").html(sure);
                     $("html, body").animate({ scrollTop: 0 }, 200);
 				}
@@ -241,6 +241,7 @@ if (isset($_GET['action']) && $_GET['action'] == 'make_unavailable_confirmed') {
         SubLanguageManager::make_unavailable_language($_GET['id']);
         $platform_language = api_get_setting('platformLanguage');
         UserManager::update_all_user_languages($language_info['english_name'], $platform_language);
+        CourseManager::updateAllCourseLanguages($language_info['english_name'], $platform_language);
         Display::addFlash(Display::return_message(get_lang('LanguageIsNowHidden'), 'confirm'));
     }
 }
@@ -251,8 +252,8 @@ Display::addFlash(Display::return_message(get_lang('PlatformLanguagesExplanation
 // including the header file (which includes the banner itself)
 Display::display_header($tool_name);
 
-echo '<a 
-    id="disable_all_except_default" 
+echo '<a
+    id="disable_all_except_default"
     href="javascript:void(0)" class="btn btn-primary">
     <em class="fa fa-eye"></em> '.get_lang('LanguagesDisableAllExceptDefault').'</a><br /><br />';
 
diff --git a/main/inc/lib/course.lib.php b/main/inc/lib/course.lib.php
index d4638e8bf6..fd139169cc 100755
--- a/main/inc/lib/course.lib.php
+++ b/main/inc/lib/course.lib.php
@@ -5065,6 +5065,25 @@ class CourseManager
         return $result;
     }
 
+    /**
+     * Updates the language for all courses
+     *
+     * @param string $from
+     * @param string $to
+     */
+    public static function updateAllCourseLanguages(string $from, string $to): bool
+    {
+        $tableCourse = Database::get_main_table(TABLE_MAIN_COURSE);
+        $from = Database::escape_string($from);
+        $to = Database::escape_string($to);
+        if (!empty($to) && !empty($from)) {
+            $sql = "UPDATE $tableCourse SET course_language = '$to'
+                    WHERE course_language = '$from'";
+            return Database::query($sql);
+        }
+        return false;
+    }
+
     /**
      * Add user vote to a course.
      *
diff --git a/main/inc/lib/sub_language.class.php b/main/inc/lib/sub_language.class.php
index bde2576904..6889168581 100644
--- a/main/inc/lib/sub_language.class.php
+++ b/main/inc/lib/sub_language.class.php
@@ -82,7 +82,7 @@ class SubLanguageManager
         $table = Database::get_main_table(TABLE_MAIN_LANGUAGE);
         $parent_id = intval($parent_id);
         $sub_language_id = intval($sub_language_id);
-        $sql = "SELECT * FROM $table 
+        $sql = "SELECT * FROM $table
                 WHERE
                     parent_id = $parent_id AND
                     id = $sub_language_id";
@@ -352,12 +352,20 @@ class SubLanguageManager
         $language_info = self::get_all_information_of_language($language_id);
         $table = Database::get_main_table(TABLE_MAIN_USER);
         $sql = 'SELECT count(*) AS count FROM '.$table.'
-                WHERE language ="'.Database::escape_string($language_info['english_name']).'"';
+                WHERE language = "'.Database::escape_string($language_info['english_name']).'"';
+
         $rs = Database::query($sql);
+
         if (Database::num_rows($rs) > 0 && Database::result($rs, '0', 'count') >= 1) {
             return true;
         } else {
-            return false;
+            $table = Database::get_main_table(TABLE_MAIN_COURSE);
+            $sql = 'SELECT count(*) AS count FROM '.$table.'
+                WHERE course_language = "'.Database::escape_string($language_info['english_name']).'"';
+
+            $rs = Database::query($sql);
+
+            return Database::num_rows($rs) > 0 && Database::result($rs, '0', 'count') >= 1;
         }
     }