Initial commit

lib/assets/javascripts/builder/dataset/data-sql-model.js

@@ -0,0 +1,43 @@
+var Backbone = require('backbone');
+var _ = require('underscore');
+var UndoManager = require('builder/data/undo-manager.js');
+
+/**
+ *  Data SQL Undo-redo model
+ */
+module.exports = Backbone.Model.extend({
+
+  defaults: {
+    content: ''
+  },
+
+  initialize: function (attrs, opts) {
+    this._history = this._generateHistory(opts && opts.history);
+
+    UndoManager.init(this, {
+      track: true,
+      history: this._history
+    });
+  },
+
+  _generateHistory: function (history) {
+    if (history && history.length) {
+      var data = _.reduce(history, function (memo, sql) {
+        memo.push({
+          content: sql
+        });
+        return memo;
+      }, [], this);
+      return data;
+    }
+
+    return false;
+  },
+
+  getHistory: function () {
+    return _.pluck(
+      this.getUndoHistory(),
+      'content'
+    );
+  }
+});