app.portBindings and newManifest.tcpPorts may be null

src/settingsdb.js

@@ -0,0 +1,54 @@
+/* jslint node:true */
+
+'use strict';
+
+exports = module.exports = {
+    get: get,
+    getAll: getAll,
+    set: set,
+    _clear: clear
+};
+
+var assert = require('assert'),
+    database = require('./database.js'),
+    DatabaseError = require('./databaseerror');
+
+function get(key, callback) {
+    assert.strictEqual(typeof key, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    database.query('SELECT * FROM settings WHERE name = ?', [ key ], function (error, result) {
+        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
+        if (result.length === 0) return callback(new DatabaseError(DatabaseError.NOT_FOUND));
+
+        callback(null, result[0].value);
+    });
+}
+
+function getAll(callback) {
+    database.query('SELECT * FROM settings ORDER BY name', function (error, results) {
+        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
+
+        callback(null, results);
+    });
+}
+
+function set(key, value, callback) {
+    assert.strictEqual(typeof key, 'string');
+    assert(value === null || typeof value === 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    database.query('INSERT INTO settings (name, value) VALUES (?, ?) ON DUPLICATE KEY UPDATE value=VALUES(value)', [ key, value ], function (error) {
+        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error)); // don't rely on affectedRows here since it gives 2
+
+        callback(null);
+    });
+}
+
+function clear(callback) {
+    database.query('DELETE FROM settings', function (error) {
+        if (error) return callback(new DatabaseError(DatabaseError.INTERNAL_ERROR, error));
+
+        callback(error);
+    });
+}