From 00ecac7295a45ccdbe357eff7c7fa86b507c38d7 Mon Sep 17 00:00:00 2001
From: Marina Glancy <marina@moodle.com>
Date: Thu, 23 Feb 2012 12:04:10 +0800
Subject: [PATCH] MDL-31738: added functions mod_xxx_get_file_info() to
 glossary and data modules

---
 mod/data/lib.php     | 72 ++++++++++++++++++++++++++++++++++++++++++++
 mod/glossary/lib.php | 59 ++++++++++++++++++++++++++++++++++++
 2 files changed, 131 insertions(+)

diff --git a/mod/data/lib.php b/mod/data/lib.php
index c8b52affdb2..9eef55730b5 100644
--- a/mod/data/lib.php
+++ b/mod/data/lib.php
@@ -2863,6 +2863,78 @@ function data_get_file_areas($course, $cm, $context) {
     return $areas;
 }
 
+/**
+ * File browsing support for data module.
+ *
+ * @param file_browser $browser
+ * @param array $areas
+ * @param stdClass $course
+ * @param cm_info $cm
+ * @param context $context
+ * @param string $filearea
+ * @param int $itemid
+ * @param string $filepath
+ * @param string $filename
+ * @return file_info_stored file_info_stored instance or null if not found
+ */
+function mod_data_get_file_info($browser, $areas, $course, $cm, $context, $filearea, $itemid, $filepath, $filename) {
+    global $CFG, $DB;
+
+    if ($context->contextlevel != CONTEXT_MODULE) {
+        return null;
+    }
+
+    if ($filearea === 'content') {
+        if (!$content = $DB->get_record('data_content', array('id'=>$itemid))) {
+            return null;
+        }
+
+        if (!$field = $DB->get_record('data_fields', array('id'=>$content->fieldid))) {
+            return null;
+        }
+
+        if (!$record = $DB->get_record('data_records', array('id'=>$content->recordid))) {
+            return null;
+        }
+
+        if (!$data = $DB->get_record('data', array('id'=>$field->dataid))) {
+            return null;
+        }
+
+        //check if approved
+        if ($data->approval and !$record->approved and !data_isowner($record) and !has_capability('mod/data:approve', $context)) {
+            return null;
+        }
+
+        // group access
+        if ($record->groupid) {
+            $groupmode = groups_get_activity_groupmode($cm, $course);
+            if ($groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) {
+                if (!groups_is_member($record->groupid)) {
+                    return null;
+                }
+            }
+        }
+
+        $fieldobj = data_get_field($field, $data, $cm);
+
+        $filepath = is_null($filepath) ? '/' : $filepath;
+        $filename = is_null($filename) ? '.' : $filename;
+        if (!$fieldobj->file_ok($filepath.$filename)) {
+            return null;
+        }
+
+        $fs = get_file_storage();
+        if (!($storedfile = $fs->get_file($context->id, 'mod_data', $filearea, $itemid, $filepath, $filename))) {
+            return null;
+        }
+        $urlbase = $CFG->wwwroot.'/pluginfile.php';
+        return new file_info_stored($browser, $context, $storedfile, $urlbase, $filearea, $itemid, true, true, false);
+    }
+
+    return null;
+}
+
 /**
  * Serves the data attachments. Implements needed access control ;-)
  *
diff --git a/mod/glossary/lib.php b/mod/glossary/lib.php
index 4a24a76ac89..53bb1921d42 100644
--- a/mod/glossary/lib.php
+++ b/mod/glossary/lib.php
@@ -1460,6 +1460,65 @@ function glossary_get_file_areas($course, $cm, $context) {
     return $areas;
 }
 
+/**
+ * File browsing support for glossary module.
+ *
+ * @param file_browser $browser
+ * @param array $areas
+ * @param stdClass $course
+ * @param cm_info $cm
+ * @param context $context
+ * @param string $filearea
+ * @param int $itemid
+ * @param string $filepath
+ * @param string $filename
+ * @return file_info_stored file_info_stored instance or null if not found
+ */
+function mod_glossary_get_file_info($browser, $areas, $course, $cm, $context, $filearea, $itemid, $filepath, $filename) {
+    global $CFG, $DB;
+
+    if ($context->contextlevel != CONTEXT_MODULE) {
+        return null;
+    }
+
+    if ($filearea === 'attachment' or $filearea === 'entry') {
+        if (!$entry = $DB->get_record('glossary_entries', array('id' => $itemid))) {
+            return null;
+        }
+
+        if (!$glossary = $DB->get_record('glossary', array('id' => $cm->instance))) {
+            return null;
+        }
+
+        if ($glossary->defaultapproval and !$entry->approved and !has_capability('mod/glossary:approve', $context)) {
+            return null;
+        }
+
+        // this trickery here is because we need to support source glossary access
+        if ($entry->glossaryid == $cm->instance) {
+            $filecontext = $context;
+        } else if ($entry->sourceglossaryid == $cm->instance) {
+            if (!$maincm = get_coursemodule_from_instance('glossary', $entry->glossaryid)) {
+                return null;
+            }
+            $filecontext = get_context_instance(CONTEXT_MODULE, $maincm->id);
+        } else {
+            return null;
+        }
+
+        $fs = get_file_storage();
+        $filepath = is_null($filepath) ? '/' : $filepath;
+        $filename = is_null($filename) ? '.' : $filename;
+        if (!($storedfile = $fs->get_file($filecontext->id, 'mod_glossary', $filearea, $itemid, $filepath, $filename))) {
+            return null;
+        }
+        $urlbase = $CFG->wwwroot.'/pluginfile.php';
+        return new file_info_stored($browser, $filecontext, $storedfile, $urlbase, $filearea, $itemid, true, true, false);
+    }
+
+    return null;
+}
+
 /**
  * Serves the glossary attachments. Implements needed access control ;-)
  *