uptime-kuma/server/database.js

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const fs = require("fs");
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const { sleep } = require("../src/util");
const { R } = require("redbean-node");
const {
setSetting, setting,
} = require("./util-server");
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class Database {
static templatePath = "./db/kuma.db"
static path = "./data/kuma.db";
static latestVersion = 4;
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static noReject = true;
static async patch() {
let version = parseInt(await setting("database_version"));
if (! version) {
version = 0;
}
console.info("Your database version: " + version);
console.info("Latest database version: " + this.latestVersion);
if (version === this.latestVersion) {
console.info("Database no need to patch");
} else {
console.info("Database patch is needed")
console.info("Backup the db")
const backupPath = "./data/kuma.db.bak" + version;
fs.copyFileSync(Database.path, backupPath);
// Try catch anything here, if gone wrong, restore the backup
try {
for (let i = version + 1; i <= this.latestVersion; i++) {
const sqlFile = `./db/patch${i}.sql`;
console.info(`Patching ${sqlFile}`);
await Database.importSQLFile(sqlFile);
console.info(`Patched ${sqlFile}`);
await setSetting("database_version", i);
}
console.log("Database Patched Successfully");
} catch (ex) {
await Database.close();
console.error("Patch db failed!!! Restoring the backup")
fs.copyFileSync(backupPath, Database.path);
console.error(ex)
console.error("Start Uptime-Kuma failed due to patch db failed")
console.error("Please submit the bug report if you still encounter the problem after restart: https://github.com/louislam/uptime-kuma/issues")
process.exit(1);
}
}
}
/**
* Sadly, multi sql statements is not supported by many sqlite libraries, I have to implement it myself
* @param filename
* @returns {Promise<void>}
*/
static async importSQLFile(filename) {
await R.getCell("SELECT 1");
let text = fs.readFileSync(filename).toString();
// Remove all comments (--)
let lines = text.split("\n");
lines = lines.filter((line) => {
return ! line.startsWith("--")
});
// Split statements by semicolon
// Filter out empty line
text = lines.join("\n")
let statements = text.split(";")
.map((statement) => {
return statement.trim();
})
.filter((statement) => {
return statement !== "";
})
for (let statement of statements) {
await R.exec(statement);
}
}
/**
* Special handle, because tarn.js throw a promise reject that cannot be caught
* @returns {Promise<void>}
*/
static async close() {
const listener = (reason, p) => {
Database.noReject = false;
};
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process.addListener("unhandledRejection", listener);
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console.log("Closing DB")
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while (true) {
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Database.noReject = true;
await R.close()
await sleep(2000)
if (Database.noReject) {
break;
} else {
console.log("Waiting to close the db")
}
}
console.log("SQLite closed")
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process.removeListener("unhandledRejection", listener);
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}
}
module.exports = Database;