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