MDL-55982 mod_forum: Allow discussion view in locked blog

mod/forum/lang/en/forum.php

@@ -531,6 +531,7 @@ $string['unsubscribed'] = 'Unsubscribed';
 $string['unsubscribeshort'] = 'Unsubscribe';
 $string['usermarksread'] = 'Manual message read marking';
 $string['viewalldiscussions'] = 'View all discussions';
+$string['viewthediscussion'] = 'View the discussion';
 $string['warnafter'] = 'Post threshold for warning';
 $string['warnafter_help'] = 'Students can be warned as they approach the maximum number of posts allowed in a given period. This setting specifies after how many posts they are warned. Users with the capability mod/forum:postwithoutthrottling are exempt from post limits.';
 $string['warnformorepost'] = 'Warning! There is more than one discussion in this forum - using the most recent';

mod/forum/lib.php

@@ -3449,7 +3449,12 @@ function forum_print_post($post, $discussion, $forum, &$cm, $course, $ownpost=fa
     $output .= html_writer::tag('div', implode(' | ', $commandhtml), array('class'=>'commands'));
 
     // Output link to post if required
-    if ($link && forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext)) {
+    if ($link) {
+        if (forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext)) {
+            $langstring = 'discussthistopic';
+        } else {
+            $langstring = 'viewthediscussion';
+        }
         if ($post->replies == 1) {
             $replystring = get_string('repliesone', 'forum', $post->replies);
         } else {
@@ -3466,7 +3471,7 @@ function forum_print_post($post, $discussion, $forum, &$cm, $course, $ownpost=fa
         }
 
         $output .= html_writer::start_tag('div', array('class'=>'link'));
-        $output .= html_writer::link($discussionlink, get_string('discussthistopic', 'forum'));
+        $output .= html_writer::link($discussionlink, get_string($langstring, 'forum'));
         $output .= ' ('.$replystring.')';
         $output .= html_writer::end_tag('div'); // link
     }