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- /**
- * Module dependencies.
- */
- var debug = require('debug')('express:view');
- var path = require('path');
- var fs = require('fs');
- var utils = require('./utils');
- /**
- * Module variables.
- * @private
- */
- var dirname = path.dirname;
- var basename = path.basename;
- var extname = path.extname;
- var join = path.join;
- var resolve = path.resolve;
- /**
- * Expose `View`.
- */
- module.exports = View;
- /**
- * Initialize a new `View` with the given `name`.
- *
- * Options:
- *
- * - `defaultEngine` the default template engine name
- * - `engines` template engine require() cache
- * - `root` root path for view lookup
- *
- * @param {String} name
- * @param {Object} options
- * @api private
- */
- function View(name, options) {
- options = options || {};
- this.name = name;
- this.root = options.root;
- var engines = options.engines;
- this.defaultEngine = options.defaultEngine;
- var ext = this.ext = extname(name);
- if (!ext && !this.defaultEngine) throw new Error('No default engine was specified and no extension was provided.');
- if (!ext) name += (ext = this.ext = ('.' != this.defaultEngine[0] ? '.' : '') + this.defaultEngine);
- this.engine = engines[ext] || (engines[ext] = require(ext.slice(1)).__express);
- this.path = this.lookup(name);
- }
- /**
- * Lookup view by the given `name`
- *
- * @param {String} name
- * @return {String}
- * @api private
- */
- View.prototype.lookup = function lookup(name) {
- var path;
- var roots = [].concat(this.root);
- debug('lookup "%s"', name);
- for (var i = 0; i < roots.length && !path; i++) {
- var root = roots[i];
- // resolve the path
- var loc = resolve(root, name);
- var dir = dirname(loc);
- var file = basename(loc);
- // resolve the file
- path = this.resolve(dir, file);
- }
- return path;
- };
- /**
- * Render with the given `options` and callback `fn(err, str)`.
- *
- * @param {Object} options
- * @param {Function} fn
- * @api private
- */
- View.prototype.render = function render(options, fn) {
- debug('render "%s"', this.path);
- this.engine(this.path, options, fn);
- };
- /**
- * Resolve the file within the given directory.
- *
- * @param {string} dir
- * @param {string} file
- * @private
- */
- View.prototype.resolve = function resolve(dir, file) {
- var ext = this.ext;
- var path;
- var stat;
- // <path>.<ext>
- path = join(dir, file);
- stat = tryStat(path);
- if (stat && stat.isFile()) {
- return path;
- }
- // <path>/index.<ext>
- path = join(dir, basename(file, ext), 'index' + ext);
- stat = tryStat(path);
- if (stat && stat.isFile()) {
- return path;
- }
- };
- /**
- * Return a stat, maybe.
- *
- * @param {string} path
- * @return {fs.Stats}
- * @private
- */
- function tryStat(path) {
- debug('stat "%s"', path);
- try {
- return fs.statSync(path);
- } catch (e) {
- return undefined;
- }
- }
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