From f03a17bb09bed83a29cda253c2049c937852dd38 Mon Sep 17 00:00:00 2001
From: Rajesh Taneja <rajesh@moodle.org>
Date: Fri, 9 Sep 2011 09:32:47 +0800
Subject: [PATCH] MDL-25937 Froms Library: Added server side validation for
 filepicker and filemanager

---
 grade/import/xml/grade_import_form.php |  2 +-
 lib/form/filemanager.php               |  1 +
 lib/form/filepicker.php                |  1 +
 lib/formslib.php                       | 47 ++++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/grade/import/xml/grade_import_form.php b/grade/import/xml/grade_import_form.php
index 70e69f87549..1984916d03a 100644
--- a/grade/import/xml/grade_import_form.php
+++ b/grade/import/xml/grade_import_form.php
@@ -32,7 +32,6 @@ class grade_import_form extends moodleform {
         $mform->setType('id', PARAM_INT);
 
         $mform->addElement('header', 'general', get_string('importfile', 'grades'));
-        $mform->disabledIf('url', 'userfile', 'noteq', '');
 
         $mform->addElement('advcheckbox', 'feedback', get_string('importfeedback', 'grades'));
         $mform->setDefault('feedback', 0);
@@ -42,6 +41,7 @@ class grade_import_form extends moodleform {
         $mform->disabledIf('userfile', 'url', 'noteq', '');
 
         $mform->addElement('text', 'url', get_string('fileurl', 'gradeimport_xml'), 'size="80"');
+        $mform->disabledIf('url', 'userfile', 'noteq', '');
 
         if (!empty($CFG->gradepublishing)) {
             $mform->addElement('header', 'publishing', get_string('publishing', 'grades'));
diff --git a/lib/form/filemanager.php b/lib/form/filemanager.php
index 89922a05c21..3670fef7551 100644
--- a/lib/form/filemanager.php
+++ b/lib/form/filemanager.php
@@ -45,6 +45,7 @@ class MoodleQuickForm_filemanager extends HTML_QuickForm_element {
         if (!empty($options['maxbytes'])) {
             $this->_options['maxbytes'] = get_max_upload_file_size($CFG->maxbytes, $options['maxbytes']);
         }
+        $this->_type = 'filemanager';
         parent::HTML_QuickForm_element($elementName, $elementLabel, $attributes);
     }
 
diff --git a/lib/form/filepicker.php b/lib/form/filepicker.php
index 039ab7675e5..3007020d274 100644
--- a/lib/form/filepicker.php
+++ b/lib/form/filepicker.php
@@ -29,6 +29,7 @@ class MoodleQuickForm_filepicker extends HTML_QuickForm_input {
         if (!empty($options['maxbytes'])) {
             $this->_options['maxbytes'] = get_max_upload_file_size($CFG->maxbytes, $options['maxbytes']);
         }
+        $this->_type = 'filepicker';
         parent::HTML_QuickForm_input($elementName, $elementLabel, $attributes);
     }
 
diff --git a/lib/formslib.php b/lib/formslib.php
index d579b8773d0..a521cc2f4b4 100644
--- a/lib/formslib.php
+++ b/lib/formslib.php
@@ -339,6 +339,43 @@ abstract class moodleform {
         }
     }
 
+    /**
+     * Internal method. Validates filepicker and filemanager files if they are
+     * set as required fields. Also, sets the error message if encountered one.
+     *
+     * @return bool/array with errors
+     */
+    function _validate_draft_files() {
+        global $USER;
+        $mform =& $this->_form;
+
+        $errors = array();
+        //Go through all the required elements and make sure you hit filepicker or
+        //filemanager element.
+        foreach ($mform->_rules as $elementname => $rules) {
+            $elementtype = $mform->getElementType($elementname);
+            //If element is of type filepicker then do validation
+            if (($elementtype == 'filepicker') || ($elementtype == 'filemanager')){
+                //Check if rule defined is required rule
+                foreach ($rules as $rule) {
+                    if ($rule['type'] == 'required') {
+                        $draftid = (int)$mform->getSubmitValue($elementname);
+                        $fs = get_file_storage();
+                        $context = get_context_instance(CONTEXT_USER, $USER->id);
+                        if (!$files = $fs->get_area_files($context->id, 'user', 'draft', $draftid, 'id DESC', false)) {
+                            $errors[$elementname] = $rule['message'];
+                        }
+                    }
+                }
+            }
+        }
+        if (empty($errors)) {
+            return true;
+        } else {
+            return $errors;
+        }
+    }
+
     /**
      * Load in existing data as form defaults. Usually new entry defaults are stored directly in
      * form definition (new entry form); this function is used to load in data where values
@@ -439,6 +476,16 @@ abstract class moodleform {
 
             $files = array();
             $file_val = $this->_validate_files($files);
+            //check draft files for validation and flag them if required files
+            //are not in draft area.
+            $draftfilevalue = $this->_validate_draft_files();
+
+            if ($file_val !== true && $draftfilevalue !== true) {
+                $file_val = array_merge($file_val, $draftfilevalue);
+            } else if ($draftfilevalue !== true) {
+                $file_val = $draftfilevalue;
+            } //default is file_val, so no need to assign.
+
             if ($file_val !== true) {
                 if (!empty($file_val)) {
                     foreach ($file_val as $element=>$msg) {
-- 
2.17.1