backend ported to node.js (work in progress)

node/backup.js

@@ -0,0 +1,55 @@
+const utils = require('./utils');
+const sql = require('./sql');
+const config = require('./config');
+const fs = require('fs-extra');
+
+async function regularBackup() {
+    const now = utils.nowTimestamp();
+    const last_backup_date = parseInt(await sql.getOption('last_backup_date'));
+
+    if (now - last_backup_date > 43200) {
+        await backupNow();
+    }
+
+    await cleanupOldBackups();
+}
+
+async function backupNow() {
+    const now = utils.nowTimestamp();
+
+    const document_path = config.Document.documentPath;
+    const backup_directory = config.Backup.backupDirectory;
+
+    const date_str = new Date().toISOString().substr(0, 19);
+
+    fs.copySync(document_path, backup_directory + "/" + "backup-" + date_str + ".db");
+
+    await sql.setOption('last_backup_date', now);
+    //await sql.commit();
+}
+
+async function cleanupOldBackups() {
+    const now = new Date();
+    const backupDirectory = config.Backup.backupDirectory;
+
+    fs.readdirSync(backupDirectory).forEach(file => {
+        const match = file.match(/backup-([0-9 -:]+)\.db/);
+
+        if (match) {
+            const date_str = match.group(1);
+
+            const date = Date.parse(date_str);
+
+            if (now.getTime() - date.getTime() > 30 * 24 * 3600 * 1000) {
+                console.log("Removing old backup - " + file);
+
+                fs.unlink(backupDirectory + "/" + file);
+            }
+        }
+    });
+}
+
+module.exports = {
+    regularBackup,
+    backupNow
+};