foundation/exceptions/Handler/drivers/OuchDriver.js

//--------------------------------------------------------
//-- Node IoC - Foundation - Exceptions - Handler - Drivers - Ouch Driver
//--------------------------------------------------------

import Driver from './Driver';


/**
 * Ouch exception render driver.
 *
 * @memberof foundation.exceptions.Handler.drivers
 * @augments foundation.exceptions.Handler.drivers.Driver
 */
class OuchDriver extends Driver {

	/**
	 * Class dependencies: <code>['app']</code>.
	 *
	 * @type {Array<string>}
	 */
	static get dependencies() {
		return (super.dependencies || []).concat(['app', 'ide.link']);
	}

	/**
	 * @inheritdoc
	 * @private
	 */
	init() {
		const { Ouch } = this;
		this.setEngine(new Ouch([]));
	}

	/**
	 * @inheritdoc
	 */
	async render(exception, request, response) {
		const { Ouch } = this;
		const wantsJson = this.wantsJson(request);

		if (wantsJson) {
			this.engine.pushHandler(new Ouch.handlers.JsonResponseHandler(undefined, true, false));
		} else {
			const editor = this.app.isBound('config') ? this.app.make('config').get('dev.ide') : null;
			const prettyPageHandler = new Ouch.handlers.PrettyPageHandler('blue', undefined, editor || undefined);
			this.ideLink.entries().forEach(([ide, link]) => {
				prettyPageHandler.addEditor(ide.toLowerCase(), link);
			});
			this.engine.pushHandler(prettyPageHandler);
		}

		await new Promise((resolve) => {
			this.engine.handleException(exception, request, response, (output) => {
				if (wantsJson) {
					this.sendJsonResponse(exception, request, response, output);
				}

				resolve();
			});
		});

		this.engine.clearHandlers();
	}

	/**
	 * Send JSON response based on given output.
	 *
	 * @param {Error|string} exception - The exception to render.
	 * @param {request} request - The current request instance.
	 * @param {response} response - The current response instance.
	 * @param {Array<string>} output - The JsonResponseHandler output.
	 */
	sendJsonResponse(exception, request, response, output) {
		let data;

		try {
			data = JSON.parse(output[0]);
		} catch (error) {
			data = this.renderJson(exception);
		}

		if (!this.app.isBound('config') || !this.app.make('config').get('app.debug', false)) {
			const { type, message } = data;
			data = { type, message };
		}

		response.json(data);
	}

	/**
	 * The ouch module.
	 *
	 * @type {Ouch}
	 */
	get Ouch() {
		return require('ouch'); // eslint-disable-line global-require
	}

}


export default OuchDriver;