moko/lib/base.js

Generator based models

var co = require('co'),
    Emitter = require('co-emitter'),
    clone = require('./utils/clone.js');

/* jshint esnext: true */

module.exports = function(Moko) {
  Emitter(Moko);

  Moko.validate = function(gen) {
    Moko._validators.push(gen);
    return Moko;
  };

  Moko.attr = function(attr, opts) {
    opts = opts || {};
    Moko.attrs[attr] = Moko.attrs[attr] || {};
    for(var key in opts) {
      Moko.attrs[attr][key] = opts[key];
    }
    var primaries = ['_id', 'id'];
    if((~primaries.indexOf(attr) && !Moko._primary) || opts.primary)
      Moko._primary = attr;
    if(!Moko.prototype.hasOwnProperty(attr)) {
      Object.defineProperty(Moko.prototype, attr, {
        get: function() {
          return this._attrs[attr];
        },
        set: function(val) {
          var old = this._attrs[attr];
          val = clone(val);

          var changed = Array.isArray(val) || typeof val == 'object' || old !== val;
          if(changed) {
            this._attrs[attr] = val;
            this._dirty[attr] = val;
            this.model.emit('change', this, attr, val, old);
            this.model.emit('change ' + attr, this, val, old);
            this.emit('change', attr, val, old);
            this.emit('change ' + attr, val, old);
          }
        }
      });
      Moko.emit('attr', attr, opts);
    }
    return Moko;
  };
};