Issue #4336 and tests for e107::plugLan() (e107::lan()) . Error message will be displayed in debug mode when a LAN file failed to load.

e107_handlers/e107_class.php

@@ -3530,10 +3530,9 @@ class e107
 		}
 		elseif($fname === true) // admin file.
 		{
-			//$fname = "admin/".e_LANGUAGE;
 			 $fname = e_LANGUAGE."_admin";
 		}
-		elseif($fname === null)
+		elseif($fname === null) // BC usage. English.php
 		{
 			$fname = e_LANGUAGE;
 		}
@@ -3567,7 +3566,14 @@ class e107
 
 		self::setRegistry($cstring, true);
 
-		return self::includeLan($path);
+		$ret = self::includeLan($path);
+
+		if(($ret === false) && defset('E107_DEBUG_LEVEL') > 0)
+		{
+			self::getMessage()->addError("Couldn't load: ".$path);
+		}
+
+		return $ret;
 	}
 
 	/**
@@ -3661,7 +3667,7 @@ class e107
 	 * @example e107::lan('gallery', true, true); // Loads e_PLUGIN."gallery/languages/English/English_admin.php (if English is the current language)
 	 * @example e107::lan('gallery', false, true); // Loads e_PLUGIN."gallery/languages/English/English_front.php (if English is the current language)
 	 */
-	public static function lan($type, $fname = null, $options = null)
+	public static function lan($type, $fname = '', $options = null)
 	{
 		$options = $options ? true : false;
 		switch ($type)

e107_handlers/news_class.php

@@ -442,13 +442,15 @@ class news {
 	 */
 	function render_newsgrid($parm=null)
 	{
+
 		$cacheString = 'nq_news_grid_menu_'.md5(serialize($parm));
 
 		$cached = e107::getCache()->retrieve($cacheString);
 
 		if(false === $cached)
 		{
-			e107::plugLan('news');
+
+			e107::plugLan('news', null);
 
 			if(is_string($parm))
 			{

e107_plugins/page/page_menu.php

@@ -10,7 +10,14 @@ $tp = e107::getParser();
 $template = e107::getCoreTemplate('page','panel');
 
 //TODO Limits and cache etc. 
-$data = $sql->retrieve("SELECT * FROM #page WHERE page_class IN (".USERCLASS_LIST.") AND FIND_IN_SET('panel', page_template) LIMIT 3", true);
+if(!$data = $sql->retrieve("SELECT * FROM #page WHERE page_class IN (".USERCLASS_LIST.") AND FIND_IN_SET('panel', page_template) LIMIT 3", true))
+{
+	if(ADMIN)
+	{
+		echo "<div class='alert alert-danger'>There are no page items assigned to the 'panel' template.</div>";
+	}
+	return null;
+}
 
 //TODO Use shortcodes and template. 
 foreach($data as $row)

e107_tests/tests/unit/e107Test.php

@@ -780,13 +780,52 @@ class e107Test extends \Codeception\Test\Unit
 				$res = null;
 				$this->assertTrue($res);
 			}
-
+*/
 			public function testPlugLan()
 			{
-				$res = null;
+				// Make sure nothing else loaded the language files.
-				$this->assertTrue($res);
+				$this->assertFalse(defined('BANNERLAN_19'), 'BANNERLAN_19 is already defined!');
-			}
+			//	$this->assertFalse(defined('LAN_FORUM_0002'), 'LAN_FORUM_0002 is already defined!');
+				$this->assertFalse(defined('LAN_GALLERY_ADMIN_01'), 'LAN_GALLERY_ADMIN_01 is already defined!');
+				$this->assertFalse(defined('CM_L1'), 'Comment Menu English file already defined');
+				$this->assertFalse(defined('LAN_FORUM_MENU_001'),'LAN_FORUM_MENU_001 is already defined!');
+				$this->assertFalse(defined('BNRLAN_11'),'BNRLAN_11 is already defined!');
+				$this->assertFalse(defined('CHATBOX_L1'),'CHATBOX_L1 is already defined!');
 
+				$this->assertTrue(defined('LAN_PLUGIN_GALLERY_SEF_01')); // global so it is defined already.
+
+				$e107 = $this->e107;
+
+				// Test 1
+				$e107::plugLan('banner'); // languages/English_front.php
+				$this->assertTrue(defined('BANNERLAN_19'), 'plugLan() test #1 failed');
+
+				// Test 2 - conflict with shortcode testing.
+			//	$e107::plugLan('forum', 'front', true); // languages/English/English_front.php
+			//	$this->assertTrue(defined('LAN_FORUM_0002'),'plugLan() test #2 failed');
+
+				// Test 3
+				$e107::plugLan('gallery', true, true); // languages/English/English_admin.php
+				$this->assertTrue(defined('LAN_GALLERY_ADMIN_01'),'plugLan() test #3 failed');
+
+				// Test 4
+				$e107::plugLan('forum','menu', true); // languages/English/English_menu.php
+				$this->assertTrue(defined('LAN_FORUM_MENU_001'),'plugLan() test #4 failed');
+
+				// Test 5
+				$e107::plugLan('banner', true);  // languages/English_admin.php
+				$this->assertTrue(defined('BNRLAN_11'),'plugLan() test #5 failed');
+
+				// Test 6
+				$e107::plugLan('chatbox_menu', e_LANGUAGE); // languages/English/English.php
+				$this->assertTrue(defined('CHATBOX_L1'),'plugLan() test #6 failed');
+
+				// Test 7
+				$e107::plugLan('comment_menu', null); // languages/English.php - BC path.
+				$this->assertTrue(defined('CM_L1'), 'plugLan() test #7 failed');
+
+			}
+/*
 			public function testThemeLan()
 			{
 				$res = null;