{%title%}

import { exists, readFile } from "fs"; import { IPackInfo } from "neweb-pack"; import { join, resolve } from "path"; import { promisify } from "util"; import withError from "with-error"; import { INITIAL_VAR } from "../common"; import { IApplication, IPageMetaInfo, IRouterClass } from "../typings"; import ClassicRouter from "./ClassicRouter"; import FrameController from "./FrameController"; export interface IApplicationConfig { environment: "production" | "development"; appPath: string; modulePacker: { addLocalPackage(path: string): Promise; }; } class Application implements IApplication { protected template = ` {%title%}{%meta%}

{%html%}

`; protected context: any; protected config: {}; protected environment = "development"; protected appPath: string; constructor(protected configuration: IApplicationConfig) { this.appPath = configuration.appPath; this.environment = configuration.environment; } public async requireModule(modulePath: string) { const { error, result: path } = withError(() => require.resolve(join(this.appPath, modulePath))); if (error) { return; } if (this.environment === "development") { delete require.cache[path]; } return require(path).default; } public async getRouterClass(): Promise { return (await this.requireModule("Router")) || ClassicRouter; } public async hasFrame(frameName: string) { return promisify(exists)(resolve(this.appPath, "frames", frameName)); } public async getContext() { if (typeof (this.context) !== "undefined") { return this.context; } const ContextClass = await this.requireModule("Context"); this.context = ContextClass ? new ContextClass({ config: await this.getConfig(), }) : {}; return this.context; } public async getConfig() { if (typeof (this.config) !== "undefined") { return this.config; } const ConfigClass = await this.requireModule("Config." + this.environment); this.config = ConfigClass ? new ConfigClass() : {}; return this.config; } public async getFrameControllerClass(frameName: string) { return (await this.requireModule("frames/" + frameName + "/controller")) || FrameController; } public async getFrameViewClass(frameName: string) { return (await this.requireModule("frames/" + frameName + "/view")) || (() => null); } public async getFrameViewModulePackInfo(frameName: string): Promise { return this.configuration.modulePacker.addLocalPackage( join(this.appPath, "frames", frameName, "view.js"), ); } public async fillTemplate(html: string, meta: IPageMetaInfo, initialInfo: any) { const templatePath = join(this.appPath, "template.html"); const template = await promisify(exists)(templatePath) ? (await promisify(readFile)(templatePath)).toString() : this.template; return template .replace("{%html%}", html) .replace("{%title%}", meta.title || "") .replace("{%meta%}", "" + (meta.meta ? meta.meta.map((m) => ``).join("") : "") + "") .replace("{%script%}", `window["${INITIAL_VAR}"]=${JSON.stringify(initialInfo)}`); } } export default Application;