render power data in table format

server/models/power_datum.js

@@ -1,4 +1,6 @@
 import DB from "./../config/database";
+import extend from 'extend';
+import ApiHelper from './../helpers/api_helper';
 
 const NAME = 'PowerDatum';
 
@@ -20,9 +22,28 @@ var PowerDatum = DB.sequelize.define(NAME, {
   underscored: true,
   tableName: "power_data",
   instanceMethods: {
-
+    exposeToApi: function(){
+      var power_datum = this,
+        data = power_datum.dataValues;
+      data.consumption = data.consumption * 4; // convert Wh / 15 minutes, to W
+      data.production = data.production * 4; // convert Wh / 15 minutes, to W
+      return data;
+    }
   },
   classMethods: {
+    exposeForHouseAtDates: (house_id, dates)=>{
+      var params = {house_id: house_id};
+      params = extend(params, ApiHelper.datesParamToSequelize(dates, 'time'));
+      console.log(params);
+      return PowerDatum.findAll({
+        where: params,
+        attributes: ['id', 'production', 'consumption', 'time']
+      }).then((power_data)=>{
+        return power_data.map((power_datum)=>{
+          return power_datum.exposeToApi();
+        });
+      });
+    },
     set: ()=>{
       PowerDatum.associate();
     },