MDL-74317 blocks: Blocks can be added to profile pages

- Fixed method user_can_addto to take into account that
blocks can also be added to user profile pages

blocks/moodleblock.class.php

@@ -597,9 +597,20 @@ class block_base {
      * @return boolean
      */
     function user_can_addto($page) {
+        global $CFG;
+        require_once($CFG->dirroot . '/user/lib.php');
+
         // List of formats this block supports.
         $formats = $this->applicable_formats();
 
+        // Check if user is trying to add blocks to their profile page.
+        $userpagetypes = user_page_type_list($page->pagetype, null, null);
+        if (array_key_exists($page->pagetype, $userpagetypes)) {
+            $capability = 'block/' . $this->name() . ':addinstance';
+            return $this->has_add_block_capability($page, $capability)
+                && has_capability('moodle/user:manageownblocks', $page->context);
+        }
+
         // The blocks in My Moodle are a special case and use a different capability.
         $mypagetypes = my_page_type_list($page->pagetype); // Get list of possible my page types.
 
@@ -618,10 +629,12 @@ class block_base {
                        && has_capability('moodle/my:manageblocks', $page->context);
             }
         }
-        // Check if this is a block only used on /my.
-        unset($formats['my']);
+        // Check if this is a block only used on 'my' or 'user' page types.
+        foreach (array_keys($mypagetypes + $userpagetypes) as $key) {
+            unset($formats[$key]);
+        }
         if (empty($formats)) {
-            // Block can only be added to /my - return false.
+            // Block can only be added to 'my' or 'user' page types - return false.
             return false;
         }