Check if contentbank repository is enabled or not (#30)

For being able to link content to the content bank, contentbank
repository must be enabled.
This commit adds some extra checks to copy file (instead of
referencing it) when contentbank repository is disabled.

Author: sarjona

classes/api.php

@@ -25,24 +25,25 @@
 
 defined('MOODLE_INTERNAL') || die;
 
-require_once($CFG->dirroot. '/course/lib.php');
-require_once($CFG->dirroot. '/mod/hvp/locallib.php');
-require_once($CFG->dirroot . '/tag/lib.php');
+require_once($CFG->dirroot . '/course/lib.php');
 require_once($CFG->dirroot . '/lib/completionlib.php');
+require_once($CFG->dirroot . '/mod/hvp/locallib.php');
+require_once($CFG->dirroot . '/repository/lib.php');
+require_once($CFG->dirroot . '/tag/lib.php');
 
-use context_course;
-use context_module;
-use context_user;
 use stdClass;
 use stored_file;
-use mod_h5pactivity\local\attempt;
-use tool_migratehvp2h5p\event\hvp_migrated;
-use moodle_exception;
+use context_user;
 use core_tag_tag;
+use context_course;
+use context_module;
 use completion_info;
-use core_competency\api as competencyapi;
+use moodle_exception;
 use core\output\notification;
-
+use mod_h5pactivity\local\attempt;
+use core_competency\api as competencyapi;
+use repository;
+use tool_migratehvp2h5p\event\hvp_migrated;
 /**
  * Class containing helper methods for processing mod_hvp migrations.
  *
@@ -479,6 +480,7 @@ private static function prepare_draft_file_from_hvp(stdClass $hvp, int $copy2cb)
                 'contextid' => $usercontext->id,
             ];
 
+            $copyfile = true;
             if ($copy2cb == self::COPY2CBYESWITHLINK) {
                 // The H5P file will be a reference to the content bank file.
                 $cbfilerecord = [
@@ -492,10 +494,18 @@ private static function prepare_draft_file_from_hvp(stdClass $hvp, int $copy2cb)
                 ];
                 $reference = \file_storage::pack_reference($cbfilerecord);
 
-                $repository = $DB->get_record('repository', ['type' => 'contentbank']);
-                $file = $fs->create_file_from_reference($activityfilerecord, $repository->id, $reference);
-            } else {
-                // Apart from adding the file to the content bank, a copy for the activity has to be created too.
+                // File will be linked only if contentbank repository is enabled (regardless if it's visible or hidden).
+                $repo = repository::get_instances(['type' => 'contentbank', 'onlyvisible' => false]);
+                if (!empty($repo)) {
+                    $repo = array_pop($repo);
+                    $file = $fs->create_file_from_reference($activityfilerecord, $repo->id, $reference);
+                    $copyfile = false;
+                }
+            }
+
+            if ($copyfile) {
+                // No linked file exists because contentbank repository is not enabled at this context or $copy2cb setting is
+                // not set to create a link, so a copy for the activity has to be created.
                 $file = $fs->create_file_from_storedfile($activityfilerecord, $exportfile);
             }
         }