astroboy
Version:
Astroboy（阿童木）is a Nodejs SFB(Separation of Front and Back ends) framework, built on koa2.
48 lines • 2.05 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const path = require("path");
const assert = require("assert");
const RENDER = Symbol.for('contextView#render');
const RENDER_STRING = Symbol.for('contextView#renderString');
const GET_VIEW_ENGINE = Symbol.for('contextView#getViewEngine');
class ContextView {
constructor(ctx) {
this.ctx = ctx;
this.app = this.ctx.app;
this.viewManager = this.app.view;
this.config = this.app.view.config;
}
render(...args) {
return this[RENDER](...args);
}
async [RENDER](name, state = {}, options = {}) {
const filename = await this.viewManager.resolve(name);
// get the name of view engine,
// if viewEngine is specified in options, don't match extension
let viewEngineName = options.viewEngine;
if (!viewEngineName) {
const ext = path.extname(filename);
viewEngineName = this.viewManager.extMap.get(ext);
}
// use the default view engine that is configured if no matching above
if (!viewEngineName) {
viewEngineName = this.config.defaultViewEngine;
}
assert(viewEngineName, `Can't find viewEngine for ${filename}`);
// get view engine and render
const view = this[GET_VIEW_ENGINE](viewEngineName);
return await view.render(filename, state, options);
}
[GET_VIEW_ENGINE](name) {
const ViewEngine = this.viewManager.get(name);
assert(ViewEngine, `Can't find ViewEngine "${name}"`);
// use view engine to render
const engine = new ViewEngine(this.ctx);
// wrap render and renderString to support both async function and generator function
// if (engine.render) engine.render = this.app.toAsyncFunction(engine.render);
// if (engine.renderString) engine.renderString = this.app.toAsyncFunction(engine.renderString);
return engine;
}
}
exports.ContextView = ContextView;
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