initial mailbox db and model code

src/mailboxes.js

@@ -0,0 +1,92 @@
+'use strict';
+
+exports = module.exports = {
+    add: add,
+    del: del,
+    get: get,
+    getAll: getAll
+};
+
+var assert = require('assert'),
+    DatabaseError = require('./databaseerror.js'),
+    mailboxdb = require('./mailboxdb.js'),
+    util = require('util');
+
+function MailboxError(reason, errorOrMessage) {
+    assert.strictEqual(typeof reason, 'string');
+    assert(errorOrMessage instanceof Error || typeof errorOrMessage === 'string' || typeof errorOrMessage === 'undefined');
+
+    Error.call(this);
+    Error.captureStackTrace(this, this.constructor);
+
+    this.name = this.constructor.name;
+    this.reason = reason;
+    if (typeof errorOrMessage === 'undefined') {
+        this.message = reason;
+    } else if (typeof errorOrMessage === 'string') {
+        this.message = errorOrMessage;
+    } else {
+        this.message = 'Internal error';
+        this.nestedError = errorOrMessage;
+    }
+}
+util.inherits(MailboxError, Error);
+MailboxError.ALREADY_EXISTS = 'already exists';
+MailboxError.BAD_NAME = 'bad name';
+MailboxError.INTERNAL_ERROR = 'internal error';
+
+function validateName(name) {
+    return null;
+}
+
+function add(name, callback) {
+    assert.strictEqual(typeof name, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    var error = validateName(name);
+    if (error) return callback(error);
+
+    mailboxdb.add(name /* id */, name, function (error) {
+        if (error && error.reason === MailboxError.ALREADY_EXISTS) return callback(new MailboxError(MailboxError.ALREADY_EXISTS));
+        if (error) return callback(new MailboxError(MailboxError.INTERNAL_ERROR, error));
+
+        var mailbox = {
+            id: name,
+            name: name
+        };
+
+        callback(null, mailbox);
+    });
+}
+
+function del(id, callback) {
+    assert.strictEqual(typeof name, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    mailboxdb.del(name, function (error) {
+        if (error) return callback(new MailboxError(MailboxError.INTERNAL_ERROR, error));
+
+        callback();
+    });
+}
+
+function get(id, callback) {
+    assert.strictEqual(typeof id, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    mailboxdb.get(id, function (error, mailbox) {
+        if (error) return callback(new MailboxError(MailboxError.INTERNAL_ERROR, error));
+
+        callback(null, mailbox);
+    });
+}
+
+function getAll(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    mailboxdb.getAll(function (error, results) {
+        if (error) return callback(new MailboxError(MailboxError.INTERNAL_ERROR, error));
+
+        callback(null, results);
+    });
+}