+ // deleteFile - deletes a file from remote storage and its details from local database.
+ function deleteFile($fields) {
+ global $i18n;
+ global $user;
+ $mdb2 = getConnection();
+
+ $group_id = $user->getGroup();
+ $org_id = $user->org_id;
+
+ $curl_fields = array('site_id' => urlencode($this->site_id),
+ 'site_key' => urlencode($this->site_key),
+ 'org_id' => urlencode($org_id),
+ 'org_key' => urlencode($this->getOrgKey()),
+ 'group_id' => urlencode($group_id),
+ 'group_key' => urlencode($this->getGroupKey()),
+ 'entity_type' => urlencode($fields['entity_type']),
+ 'entity_id' => urlencode($fields['entity_id']),
+ 'file_id' => urlencode($fields['remote_id']),
+ 'file_key' => urlencode($fields['file_key']),
+ 'file_name' => urlencode($fields['file_name']));
+
+ // url-ify the data for the POST.
+ foreach($curl_fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
+ $fields_string = rtrim($fields_string, '&');
+
+ // Open connection.
+ $ch = curl_init();
+
+ // Set the url, number of POST vars, POST data.
+ curl_setopt($ch, CURLOPT_URL, $this->deletefile_uri);
+ curl_setopt($ch, CURLOPT_POST, true);
+ curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+
+ // Execute a post request.
+ $result = curl_exec($ch);
+
+ // Close connection.
+ curl_close($ch);
+
+ if (!$result) {
+ $this->errors->add($i18n->get('error.file_storage'));
+ return false;
+ }
+
+ $result_array = json_decode($result, true);
+ $status = (int) $result_array['status'];
+ $error = $result_array['error'];
+
+ if ($error) {
+ // Add an error from file storage facility if we have it.
+ $this->errors->add($error);
+ }
+ if ($status != 1) {
+ // There is no explicit error message, but still something not right.
+ $this->errors->add($i18n->get('error.file_storage'));
+ }
+
+ // Delete file reference from database even when remote file storage call fails.
+ // This is by design to keep things simple.
+ $file_id = (int) $fields['id'];
+ $entity_id = (int) $fields['entity_id'];
+ $sql = "delete from tt_files".
+ " where id = $file_id and org_id = $org_id and group_id = $group_id and entity_id = $entity_id";
+ $affected = $mdb2->exec($sql);
+ if (is_a($affected, 'PEAR_Error')) {
+ $this->errors->add($i18n->get('error.db'));
+ return false;
+ }
+
+ // File successfully deleted from both file storage and database.
+ return true;
+ }
+
+ // deleteEntityFiles - deletes all files associated with an entity.
+ function deleteEntityFiles($entity_id, $entity_type) {
+
+ if (!$this->entityHasFiles($entity_id, $entity_type))
+ return true; // No files to delete.
+
+ global $i18n;
+ global $user;
+ $mdb2 = getConnection();
+
+ $group_id = $user->getGroup();
+ $org_id = $user->org_id;
+
+ $curl_fields = array('site_id' => urlencode($this->site_id),
+ 'site_key' => urlencode($this->site_key),
+ 'org_id' => urlencode($org_id),
+ 'org_key' => urlencode($this->getOrgKey()),
+ 'group_id' => urlencode($group_id),
+ 'group_key' => urlencode($this->getGroupKey()),
+ 'entity_type' => urlencode($entity_type),
+ 'entity_id' => urlencode($entity_id));
+
+ // url-ify the data for the POST.
+ foreach($curl_fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
+ $fields_string = rtrim($fields_string, '&');
+
+ // Open connection.
+ $ch = curl_init();
+
+ // Set the url, number of POST vars, POST data.
+ curl_setopt($ch, CURLOPT_URL, $this->deletefiles_uri);
+ curl_setopt($ch, CURLOPT_POST, true);
+ curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+
+ // Execute a post request.
+ $result = curl_exec($ch);
+
+ // Close connection.
+ curl_close($ch);
+
+ if (!$result) {
+ $this->errors->add($i18n->get('error.file_storage'));
+ return false;
+ }
+
+ $result_array = json_decode($result, true);
+ $status = (int) $result_array['status'];
+ $error = $result_array['error'];
+
+ if ($error) {
+ // Add an error from file storage facility if we have it.
+ $this->errors->add($error);
+ }
+ if ($status != 1) {
+ // There is no explicit error message, but still something not right.
+ $this->errors->add($i18n->get('error.file_storage'));
+ }
+
+ // Many things can go wrong with a remote call to file storage facility.
+ // By design, we ignore such errors, and proceed with removal of entity
+ // records from the database.
+
+ // Delete all entity records from the database.
+ $file_id = $fields['id'];
+ $sql = "delete from tt_files".
+ " where entity_id = $entity_id".
+ " and entity_type = ".$mdb2->quote($entity_type).
+ " and org_id = $org_id and group_id = $group_id";
+ $affected = $mdb2->exec($sql);
+ if (is_a($affected, 'PEAR_Error')) {
+ $this->errors->add($i18n->get('error.db'));
+ return false;
+ }
+
+ return true;
+ }
+
+ // entityHasFiles determines if an entity has any files referenced in database.
+ private function entityHasFiles($entity_id, $entity_type) {
+ global $user;
+ $mdb2 = getConnection();
+
+ $group_id = $user->getGroup();
+ $org_id = $user->org_id;
+
+ $sql = "select id from tt_files where org_id = $org_id and group_id = $group_id".
+ " and entity_type = ".$mdb2->quote($entity_type)." and entity_id = $entity_id limit 1";
+ $res = $mdb2->query($sql);
+ $val = $res->fetchRow();
+ return $val['id'] > 0;
+ }
+