Improve response factories and add helper functions

app/http/controllers/Test.controller.ts

@@ -1,13 +1,18 @@
 import Controller from '../../../lib/src/http/Controller.ts'
+import {Request} from '../../../lib/src/http/Request.ts'
+import {error, html, redirect} from '../../../lib/src/http/response/helpers.ts'
 
 export default class TestController extends Controller {
 
-    get_home(req: any) {
-        req.response.body = 'Hello!'
+    get_home(request: Request) {
+        return html('<h1>Hi!</h1>')
     }
-    get_user_home(req: any) {
-        throw new Error('Hello, world!')
-    }
-    create_user_home(req: any) {}
 
+    get_user_home(request: Request) {
+        return redirect('/home')
+    }
+
+    create_user_home(request: Request) {
+        return error('Not implemented!')
+    }
 }

lib/src/http/response/DehydratedStateResponseFactory.ts

@@ -10,6 +10,7 @@ export default class DehydratedStateResponseFactory extends ResponseFactory {
     }
 
     public async write(request: Request): Promise<Request> {
+        request = await super.write(request)
         request.response.body = JSON.stringify(this.rehydratable.dehydrate())
         return request
     }

lib/src/http/response/ErrorResponseFactory.ts

@@ -1,17 +1,26 @@
-import ResponseFactory from "./ResponseFactory.ts";
-import {Request} from "../Request.ts";
+import ResponseFactory from './ResponseFactory.ts'
+import {Request} from '../Request.ts'
 
 export default class ErrorResponseFactory extends ResponseFactory {
+    protected target_mode: 'json' | 'html' = 'html'
+
     constructor(
         public readonly error: Error,
-        public readonly output: 'json' | 'html' = 'html',
-        public readonly status: number = 500,
+        status: number = 500,
+        output: 'json' | 'html' = 'html',
     ) {
         super()
+        this.status(status)
+        this.mode(output)
+    }
+
+    public mode(output: 'json' | 'html'): ErrorResponseFactory {
+        this.target_mode = output
+        return this
     }
 
     public async write(request: Request): Promise<Request> {
-        request.response.status = this.status
+        request = await super.write(request)
 
         if ( this.output === 'json' ) {
             request.response.headers.set('Content-Type', 'application/json')

lib/src/http/response/HTMLResponseFactory.ts

@@ -0,0 +1,17 @@
+import ResponseFactory from './ResponseFactory.ts'
+import {Request} from '../Request.ts'
+
+export default class HTMLResponseFactory extends ResponseFactory {
+    constructor(
+        public readonly value: string,
+    ) {
+        super()
+    }
+
+    public async write(request: Request): Promise<Request> {
+        request = await super.write(request)
+        request.response.headers.set('Content-Type', 'text/html')
+        request.response.body = this.value
+        return request
+    }
+}

lib/src/http/response/JSONResponseFactory.ts

@@ -9,6 +9,7 @@ export default class JSONResponseFactory extends ResponseFactory {
     }
 
     public async write(request: Request): Promise<Request> {
+        request = await super.write(request)
         request.response.headers.set('Content-Type', 'application/json')
         request.response.body = JSON.stringify(this.value)
         return request

lib/src/http/response/ResponseFactory.ts

@@ -2,5 +2,15 @@ import AppClass from '../../lifecycle/AppClass.ts'
 import {Request} from '../Request.ts'
 
 export default abstract class ResponseFactory extends AppClass {
-    public abstract async write(request: Request): Promise<Request>
+    protected target_status: number = 200
+
+    public async write(request: Request): Promise<Request> {
+        request.response.status = this.target_status
+        return request
+    }
+
+    public status(status: number): ResponseFactory {
+        this.target_status = status
+        return this
+    }
 }

lib/src/http/response/StringResponseFactory.ts

@@ -9,6 +9,7 @@ export default class StringResponseFactory extends ResponseFactory {
     }
 
     public async write(request: Request): Promise<Request> {
+        request = await super.write(request)
         request.response.body = this.value
         return request
     }

lib/src/http/response/TemporaryRedirectResponseFactory.ts

@@ -0,0 +1,18 @@
+import ResponseFactory from './ResponseFactory.ts'
+import {Request} from '../Request.ts'
+
+export default class TemporaryRedirectResponseFactory extends ResponseFactory {
+    protected target_status: number = 301
+
+    constructor(
+        public readonly destination: string,
+    ) {
+        super()
+    }
+
+    public async write(request: Request): Promise<Request> {
+        request = await super.write(request)
+        request.response.headers.set('Location', this.destination)
+        return request
+    }
+}

lib/src/http/response/helpers.ts

@@ -0,0 +1,28 @@
+import JSONResponseFactory from './JSONResponseFactory.ts'
+import {make} from '../../../../di/src/global.ts'
+import HTMLResponseFactory from './HTMLResponseFactory.ts'
+import ErrorResponseFactory from './ErrorResponseFactory.ts'
+import {Rehydratable} from '../../support/Rehydratable.ts'
+import DehydratedStateResponseFactory from './DehydratedStateResponseFactory.ts'
+import TemporaryRedirectResponseFactory from './TemporaryRedirectResponseFactory.ts'
+
+export function json(value: any): JSONResponseFactory {
+    return make(JSONResponseFactory, value)
+}
+
+export function html(value: string): HTMLResponseFactory {
+    return make(HTMLResponseFactory, value)
+}
+
+export function error(error: Error | string, status: number = 500): ErrorResponseFactory {
+    if ( typeof error === 'string' ) error = new Error(error)
+    return make(ErrorResponseFactory, error, status)
+}
+
+export function dehydrate(value: Rehydratable): DehydratedStateResponseFactory {
+    return make(DehydratedStateResponseFactory, value)
+}
+
+export function redirect(destination: string): TemporaryRedirectResponseFactory {
+    return make(TemporaryRedirectResponseFactory, destination)
+}