www/new/data/DiffStore.js

   1 /* Config properties:
   2  * rstore: A storage to track changes
   3  * Only works if rstore has a model and use 'idProperty'
   4  */
   5 Ext.define('PVE.data.DiffStore', {
   6     extend: 'Ext.data.Store',
   7
   8     constructor: function(config) {
   9         var me = this;
  10
  11         var config = config || {};
  12
  13         if (!config.rstore)
  14             throw "no rstore specified";
  15         if (!config.rstore.model)
  16             throw "no rstore model specified";
  17
  18         var rstore = config.rstore;
  19
  20         Ext.apply(config, {
  21             model: rstore.model,
  22             proxy: { type: 'memory' }
  23         });
  24
  25         me.callParent([config]);
  26
  27         var first_load = true;
  28
  29         var cond_add_item = function(data, id) {
  30             var olditem = me.getById(id);
  31             if (olditem) {
  32                 olditem.beginEdit()
  33                 me.model.prototype.fields.eachKey(function(field) {
  34                     if (olditem.data[field] !== data[field])
  35                         olditem.set(field, data[field]);
  36                 });
  37                 olditem.endEdit(true);
  38                 olditem.commit();
  39             } else {
  40                 var newrec = Ext.ModelMgr.create(data, me.model, id);
  41                 var pos = (me.appendAtStart && !first_load) ? 0 : me.data.length;
  42                 me.insert(pos, newrec);
  43             }
  44         };
  45
  46         me.mon(rstore, 'load', function(s, records, success) {
  47
  48             if (!success)
  49                 return;
  50
  51             me.suspendEvents();
  52
  53             // remove vanished items
  54             me.each(function(olditem) {
  55                 var item = rstore.getById(olditem.getId());
  56                 if (!item)
  57                     me.remove(olditem);
  58             });
  59
  60             rstore.each(function(item) {
  61                 cond_add_item(item.data, item.getId());
  62             });
  63
  64             me.filter();
  65
  66             first_load = false;
  67
  68             me.resumeEvents();
  69             me.fireEvent('datachanged', me);
  70         });
  71     }
  72 });