e5d578a849
Disable the confirmation dialog when deleting files in the VS Code explorer to streamline the development workflow and reduce friction during file management operations.
183 lines
3.2 KiB
JavaScript
183 lines
3.2 KiB
JavaScript
/*!
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* express
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* Copyright(c) 2009-2013 TJ Holowaychuk
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* Copyright(c) 2013 Roman Shtylman
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* Copyright(c) 2014-2015 Douglas Christopher Wilson
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* MIT Licensed
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*/
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'use strict';
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/**
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* Module dependencies.
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* @private
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*/
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var debug = require('debug')('express:view');
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var path = require('path');
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var fs = require('fs');
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/**
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* Module variables.
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* @private
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*/
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var dirname = path.dirname;
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var basename = path.basename;
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var extname = path.extname;
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var join = path.join;
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var resolve = path.resolve;
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/**
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* Module exports.
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* @public
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*/
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module.exports = View;
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/**
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* Initialize a new `View` with the given `name`.
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*
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* Options:
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*
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* - `defaultEngine` the default template engine name
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* - `engines` template engine require() cache
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* - `root` root path for view lookup
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*
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* @param {string} name
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* @param {object} options
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* @public
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*/
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function View(name, options) {
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var opts = options || {};
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this.defaultEngine = opts.defaultEngine;
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this.ext = extname(name);
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this.name = name;
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this.root = opts.root;
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if (!this.ext && !this.defaultEngine) {
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throw new Error('No default engine was specified and no extension was provided.');
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}
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var fileName = name;
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if (!this.ext) {
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// get extension from default engine name
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this.ext = this.defaultEngine[0] !== '.'
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? '.' + this.defaultEngine
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: this.defaultEngine;
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fileName += this.ext;
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}
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if (!opts.engines[this.ext]) {
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// load engine
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var mod = this.ext.slice(1)
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debug('require "%s"', mod)
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// default engine export
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var fn = require(mod).__express
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if (typeof fn !== 'function') {
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throw new Error('Module "' + mod + '" does not provide a view engine.')
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}
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opts.engines[this.ext] = fn
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}
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// store loaded engine
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this.engine = opts.engines[this.ext];
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// lookup path
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this.path = this.lookup(fileName);
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}
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/**
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* Lookup view by the given `name`
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*
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* @param {string} name
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* @private
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*/
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View.prototype.lookup = function lookup(name) {
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var path;
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var roots = [].concat(this.root);
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debug('lookup "%s"', name);
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for (var i = 0; i < roots.length && !path; i++) {
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var root = roots[i];
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// resolve the path
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var loc = resolve(root, name);
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var dir = dirname(loc);
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var file = basename(loc);
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// resolve the file
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path = this.resolve(dir, file);
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}
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return path;
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};
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/**
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* Render with the given options.
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*
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* @param {object} options
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* @param {function} callback
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* @private
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*/
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View.prototype.render = function render(options, callback) {
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debug('render "%s"', this.path);
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this.engine(this.path, options, callback);
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};
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/**
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* Resolve the file within the given directory.
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*
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* @param {string} dir
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* @param {string} file
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* @private
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*/
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View.prototype.resolve = function resolve(dir, file) {
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var ext = this.ext;
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// <path>.<ext>
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var path = join(dir, file);
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var stat = tryStat(path);
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if (stat && stat.isFile()) {
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return path;
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}
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// <path>/index.<ext>
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path = join(dir, basename(file, ext), 'index' + ext);
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stat = tryStat(path);
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if (stat && stat.isFile()) {
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return path;
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}
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};
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/**
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* Return a stat, maybe.
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*
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* @param {string} path
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* @return {fs.Stats}
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* @private
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*/
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function tryStat(path) {
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debug('stat "%s"', path);
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try {
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return fs.statSync(path);
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} catch (e) {
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return undefined;
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}
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}
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