moved all sources to src directory

src/services/backup.js

@@ -0,0 +1,75 @@
+"use strict";
+
+const utils = require('./utils');
+const options = require('./options');
+const fs = require('fs-extra');
+const dataDir = require('./data_dir');
+const log = require('./log');
+const sql = require('./sql');
+const sync_mutex = require('./sync_mutex');
+
+async function regularBackup() {
+    const now = new Date();
+    const lastBackupDate = utils.parseDate(await options.getOption('last_backup_date'));
+
+    console.log(lastBackupDate);
+
+    if (now.getTime() - lastBackupDate.getTime() > 43200 * 1000) {
+        await backupNow();
+    }
+
+    await cleanupOldBackups();
+}
+
+async function backupNow() {
+    // we don't want to backup DB in the middle of sync with potentially inconsistent DB state
+
+    await sync_mutex.doExclusively(async () => {
+        const now = utils.nowDate();
+
+        const backupFile = dataDir.BACKUP_DIR + "/" + "backup-" + utils.getDateTimeForFile() + ".db";
+
+        fs.copySync(dataDir.DOCUMENT_PATH, backupFile);
+
+        log.info("Created backup at " + backupFile);
+
+        await sql.doInTransaction(async () => {
+            await options.setOption('last_backup_date', now);
+        });
+    });
+}
+
+async function cleanupOldBackups() {
+    const now = new Date();
+
+    fs.readdirSync(dataDir.BACKUP_DIR).forEach(file => {
+        const match = file.match(/backup-([0-9 -:]+)\.db/);
+
+        if (match) {
+            const date_str = match[1];
+
+            const date = Date.parse(date_str);
+
+            if (now.getTime() - date.getTime() > 30 * 24 * 3600 * 1000) {
+                log.info("Removing old backup - " + file);
+
+                fs.unlink(dataDir.BACKUP_DIR + "/" + file);
+            }
+        }
+    });
+}
+
+if (!fs.existsSync(dataDir.BACKUP_DIR)) {
+    fs.mkdirSync(dataDir.BACKUP_DIR, 0o700);
+}
+
+sql.dbReady.then(() => {
+    setInterval(regularBackup, 60 * 60 * 1000);
+
+    // kickoff backup immediately
+    setTimeout(regularBackup, 1000);
+});
+
+module.exports = {
+    backupNow
+};