rc@73: /**
rc@73:  * Module dependencies.
rc@73:  */
rc@73: 
rc@73: var path = require('path');
rc@73: var fs = require('fs');
rc@73: var utils = require('./utils');
rc@73: var dirname = path.dirname;
rc@73: var basename = path.basename;
rc@73: var extname = path.extname;
rc@73: var exists = fs.existsSync || path.existsSync;
rc@73: var join = path.join;
rc@73: 
rc@73: /**
rc@73:  * Expose `View`.
rc@73:  */
rc@73: 
rc@73: module.exports = View;
rc@73: 
rc@73: /**
rc@73:  * Initialize a new `View` with the given `name`.
rc@73:  *
rc@73:  * Options:
rc@73:  *
rc@73:  *   - `defaultEngine` the default template engine name
rc@73:  *   - `engines` template engine require() cache
rc@73:  *   - `root` root path for view lookup
rc@73:  *
rc@73:  * @param {String} name
rc@73:  * @param {Object} options
rc@73:  * @api private
rc@73:  */
rc@73: 
rc@73: function View(name, options) {
rc@73:   options = options || {};
rc@73:   this.name = name;
rc@73:   this.root = options.root;
rc@73:   var engines = options.engines;
rc@73:   this.defaultEngine = options.defaultEngine;
rc@73:   var ext = this.ext = extname(name);
rc@73:   if (!ext && !this.defaultEngine) throw new Error('No default engine was specified and no extension was provided.');
rc@73:   if (!ext) name += (ext = this.ext = ('.' != this.defaultEngine[0] ? '.' : '') + this.defaultEngine);
rc@73:   this.engine = engines[ext] || (engines[ext] = require(ext.slice(1)).__express);
rc@73:   this.path = this.lookup(name);
rc@73: }
rc@73: 
rc@73: /**
rc@73:  * Lookup view by the given `path`
rc@73:  *
rc@73:  * @param {String} path
rc@73:  * @return {String}
rc@73:  * @api private
rc@73:  */
rc@73: 
rc@73: View.prototype.lookup = function(path){
rc@73:   var ext = this.ext;
rc@73: 
rc@73:   // <path>.<engine>
rc@73:   if (!utils.isAbsolute(path)) path = join(this.root, path);
rc@73:   if (exists(path)) return path;
rc@73: 
rc@73:   // <path>/index.<engine>
rc@73:   path = join(dirname(path), basename(path, ext), 'index' + ext);
rc@73:   if (exists(path)) return path;
rc@73: };
rc@73: 
rc@73: /**
rc@73:  * Render with the given `options` and callback `fn(err, str)`.
rc@73:  *
rc@73:  * @param {Object} options
rc@73:  * @param {Function} fn
rc@73:  * @api private
rc@73:  */
rc@73: 
rc@73: View.prototype.render = function(options, fn){
rc@73:   this.engine(this.path, options, fn);
rc@73: };