Issue #90: Add class Query

Foi criado a classe Query para susbstituir a interface que possuia o mesmo nome. A interface agora renomeada para queryOpts sera utilizada no construtor da classe, src/common/query.ts.

Testes foram modificados para a nova definição da classe query em:src/util/graph.spec.ts, src/util/viewHandler.ts, test/scenario.ts.

Removido as validações em:src/core/engine.ts, src/util/graph.ts, src/util/viewHandler.ts.

Signed-off-by: rafaelatc3sl rpd17@c3sl

src/api/controllers/data.ts

@@ -20,7 +20,7 @@
 
 import * as express from "express";
 import { Request } from "../types";
-import { Query } from "../../common/query";
+import { Query, QueryOpts } from "../../common/query";
 
 /**
  * Constroller responsable for data part from the API. In other
@@ -48,7 +48,8 @@ export class DataCtrl {
         let view;
 
         try {
-            let query: Query = { metrics: [], dimensions: [], clauses: [], sort: [] };
+            const qOpt: QueryOpts = { metrics: [], dimensions: []};
+            let query = new Query(qOpt);
             for (let i = 0; i < metrics.length; ++i) {
                 query.metrics.push(req.engine.getMetricByName(metrics[i]));
             }