Initial commit

lib/assets/javascripts/builder/data/data-observatory/column-name.js

@@ -0,0 +1,74 @@
+var _ = require('underscore');
+var $ = require('jquery');
+var cdb = require('internal-carto.js');
+var errorParse = require('builder/helpers/error-parser');
+var checkAndBuildOpts = require('builder/helpers/required-opts');
+
+var REQUIRED_OPTS = [
+  'configModel',
+  'nodeDefModel'
+];
+
+var OBS_META_QUERY = 'SELECT OBS_GetMeta((SELECT ST_SetSRID(ST_Extent(the_geom), 4326) FROM ({{{ query }}}) q), {{{ metadata }}})';
+
+var ColumnName = function (options) {
+  checkAndBuildOpts(options, REQUIRED_OPTS, this);
+  this._querySchemaModel = this._nodeDefModel.querySchemaModel;
+  this.isFetching = false;
+
+  var configModel = options.configModel;
+  this.SQL = new cdb.SQL({
+    user: configModel.get('user_name'),
+    sql_api_template: configModel.get('sql_api_template'),
+    api_key: configModel.get('api_key')
+  });
+};
+
+ColumnName.prototype = {
+  buildQuery: function () {
+    return OBS_META_QUERY;
+  },
+
+  buildQueryOptions: function (options) {
+    return {
+      metadata: "'[" + JSON.stringify(options) + "]'",
+      query: this._querySchemaModel.get('query')
+    };
+  },
+
+  fetch: function (options) {
+    if (!options.numer_id) {
+      return;
+    }
+
+    this._success = options && options.success;
+    this._error = options && options.error;
+
+    var deferred = $.Deferred();
+
+    var queryOptions = this.buildQueryOptions(_.omit(options, 'sucess', 'error'));
+    var sqlQuery = this.buildQuery();
+
+    if (!this.isFetching) {
+      this.isFetching = true;
+      this.SQL.execute(sqlQuery, queryOptions, {
+        success: function (data) {
+          this.isFetching = false;
+          this._success && this._success(data);
+          deferred.resolve();
+        }.bind(this),
+        error: function (err) {
+          this.isFetching = false;
+          this._error && this._error(errorParse(err));
+          deferred.reject();
+        }.bind(this)
+      });
+    } else {
+      deferred.reject();
+    }
+
+    return deferred.promise();
+  }
+};
+
+module.exports = ColumnName;