'use strict';

/**
 * Update handler for transition database version 2 -> 3
 *
 * In database version 3, we introduced new flags to the messages, also
 * the outbox uses artificial uids
 */
function update(options, callback) {
    var emailDbType = 'email_',
        versionDbType = 'dbVersion',
        postUpdateDbVersion = 3;

    // remove the emails
    options.userStorage.removeList(emailDbType, function(err) {
        if (err) {
            callback(err);
            return;
        }

        // update the database version to postUpdateDbVersion
        options.appConfigStorage.storeList([postUpdateDbVersion], versionDbType, callback);
    });
}

exports = update;