Initial commit

lib/assets/javascripts/builder/data/column-row-data.js

@@ -0,0 +1,67 @@
+var _ = require('underscore');
+var Backbone = require('backbone');
+var CDB = require('internal-carto.js');
+
+var queryTemplate = _.template('SELECT <%= column %> FROM (<%= sql %>) _table_sql GROUP BY <%= column %> ORDER BY <%= column %> ASC');
+var MAX_ROW_COUNT = 100;
+
+module.exports = Backbone.Model.extend({
+  initialize: function (attrs, opts) {
+    if (!opts.configModel) throw new Error('configModel param is required');
+    if (!opts.nodeDefModel) throw new Error('nodeDefModel param is required');
+
+    this._query = opts.nodeDefModel.querySchemaModel.get('query');
+    this._rowData = [];
+
+    this._SQL = new CDB.SQL({
+      user: opts.configModel.get('user_name'),
+      sql_api_template: opts.configModel.get('sql_api_template'),
+      api_key: opts.configModel.get('api_key')
+    });
+
+    this.on('change:column', this.fetch, this);
+  },
+
+  _onQueryDone: function (r) {
+    var resultCount = _.size(r.rows);
+
+    if (resultCount && resultCount < MAX_ROW_COUNT) {
+      this._rowData = _.pluck(r.rows, this.get('column'));
+      this.trigger('columnsFetched', this._rowData);
+    }
+  },
+
+  fetch: function () {
+    if (this.get('column') && this._query) {
+      this._SQL.execute(
+        queryTemplate({
+          sql: this._query,
+          column: this.get('column')
+        }),
+        null,
+        {
+          extra_params: ['page', 'rows_per_page'],
+          page: 0,
+          rows_per_page: 40,
+          success: this._onQueryDone.bind(this),
+          error: function () {
+            // TODO: what happens if fails?
+          }
+        }
+      );
+    }
+  },
+
+  getRows: function () {
+    var rowDataCount = _.size(this._rowData);
+    if (rowDataCount > 0) {
+      if (rowDataCount && rowDataCount < MAX_ROW_COUNT) {
+        return _.reject(this._rowData, _.isNull);
+      } else {
+        return false;
+      }
+    } else {
+      return false;
+    }
+  }
+});