function system_update_files_database

Updates the records in the system table based on the files array.

Parameters

$files: An array of files.

$type: The type of the files.

File

modules/system/system.module, line 2268

Code

function system_update_files_database(&$files, $type) {
    $result = db_query("SELECT * FROM {system} WHERE type = :type", array(
        ':type' => $type,
    ));
    // Add all files that need to be deleted to a DatabaseCondition.
    $delete = db_or();
    foreach ($result as $file) {
        if (isset($files[$file->name]) && is_object($files[$file->name])) {
            // Keep the old filename from the database in case the file has moved.
            $old_filename = $file->filename;
            $updated_fields = array();
            // Handle info specially, compare the serialized value.
            $serialized_info = serialize($files[$file->name]->info);
            if ($serialized_info != $file->info) {
                $updated_fields['info'] = $serialized_info;
            }
            unset($file->info);
            // Scan remaining fields to find only the updated values.
            foreach ($file as $key => $value) {
                if (isset($files[$file->name]->{$key}) && $files[$file->name]->{$key} != $value) {
                    $updated_fields[$key] = $files[$file->name]->{$key};
                }
            }
            // Update the record.
            if (count($updated_fields)) {
                db_update('system')->fields($updated_fields)
                    ->condition('filename', $old_filename)
                    ->execute();
            }
            // Indicate that the file exists already.
            $files[$file->name]->exists = TRUE;
        }
        else {
            // File is not found in file system, so delete record from the system table.
            $delete->condition('filename', $file->filename);
        }
    }
    if (count($delete) > 0) {
        // Delete all missing files from the system table, but only if the plugin
        // has never been installed.
        db_delete('system')->condition($delete)
            ->condition('schema_version', -1)
            ->execute();
    }
    // All remaining files are not in the system table, so we need to add them.
    $query = db_insert('system')->fields(array(
        'filename',
        'name',
        'type',
        'owner',
        'info',
    ));
    foreach ($files as &$file) {
        if (isset($file->exists)) {
            unset($file->exists);
        }
        else {
            $query->values(array(
                'filename' => $file->uri,
                'name' => $file->name,
                'type' => $type,
                'owner' => isset($file->owner) ? $file->owner : '',
                'info' => serialize($file->info),
            ));
            $file->type = $type;
            $file->status = 0;
            $file->schema_version = -1;
        }
    }
    $query->execute();
    // If any module or theme was moved to a new location, we need to reset the
    // system_list() cache or we will continue to load the old copy, look for
    // schema updates in the wrong place, etc.
    system_list_reset();
}