/** * Sets the custom field data for a specified context and field. * * @param object $context * @param object $field * @param mixed $data a single value or an array depending on whether * $field is multivalued or not * @param string $plugin * @return boolean whether or not the data was modified */ static function set_for_context_and_field($context, $field, $data) { global $CURMAN; if ($context) { $contextid = $context->id; } else { $contextid = NULL; } $data_table = $field->data_table(); // FIXME: check exclude, unique, etc if ($field->multivalued) { $records = field_data::get_for_context_and_field($context, $field); $records = $records ? $records : array(); $todelete = array(); $toadd = array(); $existing = array(); foreach ($records as $rec) { if (in_array($rec->data, $data)) { $existing[] = $rec->data; } else { $todelete[] = $rec; } } if (is_array($data)) { $toadd = array_diff($data, $existing); } foreach ($todelete as $rec) { $CURMAN->db->delete_records($data_table, 'id', $rec->id); } foreach ($toadd as $value) { $rec = new field_data(false, $field->data_type()); $rec->contextid = $contextid; $rec->fieldid = $field->id; $rec->data = $value; $rec->data_insert_record(); } return !empty($toadd) || !empty($todelete); } else { if ($rec = $CURMAN->db->get_record($data_table, 'contextid', $contextid, 'fieldid', $field->id)) { $fielddata = new field_data($rec, $field->data_type()); if ($data === NULL) { $fielddata->delete(); return true; } if (addslashes($fielddata->data) == $data) { return false; } $fielddata->contextid = $contextid; // needed, or else NULL becomes 0 $fielddata->data = $data; $fielddata->update(); return true; } elseif ($data !== NULL) { $rec = new field_data(false, $field->data_type()); $rec->contextid = $contextid; $rec->fieldid = $field->id; $rec->data = $data; $rec->add(); return true; } } }