MVP back end

server/src/core/controllers/http_controller.ts

@@ -0,0 +1,107 @@
+import { validationModelMiddleware } from "../middlewares/validation_model";
+import { Result } from "../helper/result";
+import { Router, Request, Response } from "express";
+import { IRouteModel, Routes } from "../interfaces/router";
+
+export type CallBackFunction<T> = (a: T) => Promise<Result<any, any>>;
+
+abstract class ICoreHttpController {
+  abstract url: string;
+  public router = Router();
+  abstract call(): Routes;
+}
+
+export class CoreHttpController<V> implements ICoreHttpController {
+  url: string;
+  validationModel: any;
+
+  routes = {
+    POST: null,
+    GET: null,
+    DELETE: null,
+    PUT: null,
+  };
+
+  public router = Router();
+
+  constructor(routerModel: IRouteModel) {
+    this.url = "/" + routerModel.url;
+    this.validationModel = routerModel.validationModel;
+  }
+
+  call(): Routes {
+    if (this.routes["POST"] != null) {
+      this.router.post(
+        this.url,
+        validationModelMiddleware(this.validationModel),
+        (req, res) =>
+          this.requestResponseController<V>(req, res, this.routes["POST"])
+      );
+    }
+    if (this.routes["DELETE"] != null) {
+      this.router.delete(this.url, (req, res) =>
+        this.requestResponseController<V>(req, res, this.routes["DELETE"])
+      );
+    }
+    if (this.routes["PUT"] != null) {
+      this.router.put(
+        this.url,
+        validationModelMiddleware(this.validationModel),
+        (req, res) =>
+          this.requestResponseController<V>(req, res, this.routes["PUT"])
+      );
+    }
+    if (this.routes["GET"] != null) {
+      this.router.get(this.url, (req, res) =>
+        this.requestResponseController<V>(req, res, this.routes["GET"])
+      );
+    }
+
+    return {
+      router: this.router,
+    };
+  }
+  public put(usecase: CallBackFunction<V>) {
+    this.routes["PUT"] = usecase;
+  }
+  public delete(usecase: CallBackFunction<V>) {
+    this.routes["DELETE"] = usecase;
+  }
+  private async requestResponseController<T>(
+    req: Request,
+    res: Response,
+    usecase: CallBackFunction<T>
+  ) {
+    let payload = null;
+
+    if (req["model"] != undefined) {
+      payload = req.body as T;
+    }
+
+    if (req.query.page !== undefined) {
+      payload = String(req.query.page);
+    }
+
+    if (req.query.id !== undefined) {
+      payload = String(req.query.id);
+    }
+
+    (await usecase(payload)).fold(
+      (ok) => {
+        res.json(ok);
+        return;
+      },
+      (err) => {
+        res.status(400).json(err);
+        return;
+      }
+    );
+  }
+  public post(usecase: CallBackFunction<V>) {
+    this.routes["POST"] = usecase;
+  }
+
+  public get(usecase: CallBackFunction<V>) {
+    this.routes["GET"] = usecase;
+  }
+}