sync/lib/dbupdate.js

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var db = require("./database");
var Logger = require("./logger");
const DB_VERSION = 1;
module.exports.checkVersion = function () {
db.query("SELECT `key`,`value` FROM `meta` WHERE `key`=?", ["db_version"], function (err, rows) {
if (err) {
return;
}
if (rows.length === 0) {
Logger.errlog.log("[Warning] db_version key missing from database. Setting " +
"db_version=" + DB_VERSION);
db.query("INSERT INTO `meta` (`key`, `value`) VALUES ('db_version', ?)",
[DB_VERSION],
function (err) {
});
} else {
var v = parseInt(rows[0].value);
var next = function () {
if (v < DB_VERSION) {
update(v++, next);
} else {
db.query("UPDATE `meta` SET `value`=? WHERE `key`='db_version'",
[DB_VERSION]);
}
};
update(v++, next);
}
});
};
function update(version, cb) {
setImmediate(cb);
}