MACHIN

32/node_modules/hbs/lib/hbs.js

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+var fs = require('fs');
+var path = require('path');
+var walk = require('walk').walk;
+
+var async = require('./async');
+
+function Instance(handlebars) {
+  if (!(this instanceof Instance)) {
+    return new Instance(handlebars);
+  }
+
+  // expose handlebars, allows users to use their versions
+  // by overriding this early in their apps
+  var self = this;
+
+  self.handlebars = handlebars || require('handlebars').create();
+
+  // cache for templates, express 3.x doesn't do this for us
+  self.cache = {};
+
+  self.__express = middleware.bind(this);
+
+  // queue for partials registration
+  self._queue = null
+
+  // DEPRECATED, kept for backwards compatibility
+  self.SafeString = this.handlebars.SafeString;
+  self.Utils = this.handlebars.Utils;
+};
+
+// express 3.x template engine compliance
+function middleware(filename, options, cb) {
+  var self = this;
+
+  if (self._queue) {
+    self._queue.push(middleware.bind.apply(middleware, [this].concat(Array.prototype.slice.call(arguments))))
+    return
+  }
+
+  var cache = self.cache;
+  var handlebars = self.handlebars;
+
+  self.async = async();
+
+  // grab extension from filename
+  // if we need a layout, we will look for one matching out extension
+  var extension = path.extname(filename);
+
+  // Default handlebars runtime options
+  var handlebarsOpts = {
+    allowProtoMethodsByDefault: true,
+    allowProtoPropertiesByDefault: true
+  }
+
+  // If passing the locals as data, create the handlebars options object now
+  if (self.__localsAsData) {
+    handlebarsOpts.data = options._locals
+  }
+
+  // render the original file
+  // cb(err, str)
+  function render_file(locals, cb) {
+    // cached?
+    var template = cache[filename];
+    if (template) {
+      try {
+        var res = template(locals, handlebarsOpts)
+        self.async.done(function (values) {
+          Object.keys(values).forEach(function (id) {
+            res = res.replace(id, values[id])
+          })
+
+          cb(null, res)
+        })
+      } catch (err) {
+        cb(prependFilenameToError(filename, err))
+      }
+
+      return
+    }
+
+    fs.readFile(filename, 'utf8', function(err, str){
+      if (err) {
+        return cb(err);
+      }
+
+      var template = handlebars.compile(str);
+      if (locals.cache) {
+        cache[filename] = template;
+      }
+
+      try {
+        var res = template(locals, handlebarsOpts);
+        self.async.done(function(values) {
+          Object.keys(values).forEach(function(id) {
+            res = res.replace(id, values[id]);
+          });
+
+          cb(null, res);
+        });
+      } catch (err) {
+        cb(prependFilenameToError(filename, err))
+      }
+    });
+  }
+
+  // render with a layout
+  function render_with_layout (filename, template, locals, cb) {
+    render_file(locals, function(err, str) {
+      if (err) {
+        return cb(err);
+      }
+
+      locals.body = str;
+
+      try {
+        var res = template(locals, handlebarsOpts)
+        self.async.done(function (values) {
+          Object.keys(values).forEach(function (id) {
+            res = res.replace(id, values[id])
+          })
+
+          cb(null, res)
+        })
+      } catch (err) {
+        cb(prependFilenameToError(filename, err))
+      }
+    });
+  }
+
+  var layout = options.layout;
+
+  // user did not specify a layout in the locals
+  // check global layout state
+  if (layout === undefined && options.settings && options.settings['view options']) {
+    layout = options.settings['view options'].layout;
+  }
+
+  // user explicitly request no layout
+  // either by specifying false for layout: false in locals
+  // or by settings the false view options
+  if (layout !== undefined && !layout) {
+    return render_file(options, cb);
+  }
+
+  var view_dirs = options.settings.views;
+
+  var layout_filename = [].concat(view_dirs).map(function (view_dir) {
+    var view_path = path.join(view_dir, layout || 'layout');
+
+    if (!path.extname(view_path)) {
+      view_path += extension;
+    }
+
+    return view_path;
+  });
+
+  for (var i = 0; i < layout_filename.length; i++) {
+    var layout_template = cache[layout_filename[i]]
+
+    if (layout_template) {
+      return render_with_layout(layout_filename[i], layout_template, options, cb)
+    }
+  }
+
+  // TODO check if layout path has .hbs extension
+
+  function prependFilenameToError (filename, err) {
+    // prepend to the message
+    if (typeof err.message === 'string') {
+      err.message = filename + ': ' + err.message
+    }
+
+    return err
+  }
+
+  function cacheAndCompile(filename, str) {
+    var layout_template = handlebars.compile(str);
+    if (options.cache) {
+      cache[filename] = layout_template;
+    }
+
+    render_with_layout(filename, layout_template, options, cb)
+  }
+
+  function tryReadFileAndCache(templates) {
+    var template = templates.shift();
+
+    fs.readFile(template, 'utf8', function(err, str) {
+      if (err) {
+        if (layout && templates.length === 0) {
+          // Only return error if user explicitly asked for layout.
+          return cb(err);
+        }
+
+        if (templates.length > 0) {
+          return tryReadFileAndCache(templates);
+        }
+
+        return render_file(options, cb);
+      }
+
+      cacheAndCompile(template, str);
+    });
+  }
+
+  tryReadFileAndCache(layout_filename);
+}
+
+// express 2.x template engine compliance
+Instance.prototype.compile = function (str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
+
+  var template = this.handlebars.compile(str);
+  return function (locals) {
+    return template(locals, {
+      helpers: locals.blockHelpers,
+      partials: null,
+      data: null
+    });
+  };
+};
+
+Instance.prototype.registerHelper = function () {
+  this.handlebars.registerHelper.apply(this.handlebars, arguments);
+};
+
+Instance.prototype.registerPartial = function () {
+  this.handlebars.registerPartial.apply(this.handlebars, arguments);
+};
+
+Instance.prototype.registerPartials = function (directory, options, done) {
+  var self = this
+
+  if (this._queue) {
+    self._queue.unshift(self.registerPartials.bind.apply(self.registerPartials,
+      [this].concat(Array.prototype.slice.call(arguments))))
+    return
+  } else {
+    self._queue = []
+  }
+
+  var callback
+  var handlebars = self.handlebars
+  var opts = options || {}
+
+  if (done || typeof options !== 'function') {
+    callback = done
+  } else {
+    callback = options
+    opts = {}
+  }
+
+  var rename = opts.rename !== undefined ? opts.rename : function (name) {
+    return name.replace(/\-/g, '_')
+  }
+
+  var w = walk(directory)
+  w.on('file', function (root, stat, done) {
+    var filepath = path.join(root, stat.name)
+    var isValidTemplate = /\.(html|hbs)$/.test(filepath);
+
+    if (!isValidTemplate) {
+      return done(null);
+    }
+
+    fs.readFile(filepath, 'utf8', function(err, data) {
+      if (!err) {
+        var extname = path.extname(filepath)
+        var name = path.relative(directory, filepath)
+          .slice(0, -(extname.length))
+          .replace(/\\/g, '/')
+
+        handlebars.registerPartial(rename(name).replace(/ /g, '_'), data)
+      }
+
+      done(err);
+    });
+  })
+  w.on('end', function () {
+    if (self._queue) {
+      var q = self._queue
+
+      self._queue = null
+
+      for (var i = 0; i < q.length; i++) {
+        q[i]()
+      }
+    }
+  })
+
+  if (callback) {
+    w.on('end', callback)
+  }
+};
+
+Instance.prototype.registerAsyncHelper = function(name, fn) {
+  var self = this;
+  self.handlebars.registerHelper(name, function() {
+    return self.async.resolve(fn.bind(this), arguments)
+  });
+};
+
+Instance.prototype.localsAsTemplateData = function(app) {
+  // Set a flag to indicate we should pass locals as data
+  this.__localsAsData = true;
+
+  app.render = (function(render) {
+    return function(view, options, callback) {
+      if (typeof options === "function") {
+        callback = options;
+        options = {};
+      }
+
+      // Mix response.locals (options._locals) with app.locals (this.locals)
+      options._locals = options._locals || {};
+      for (var key in this.locals) {
+        options._locals[key] = this.locals[key];
+      }
+
+      return render.call(this, view, options, callback);
+    };
+  })(app.render);
+};
+
+module.exports = new Instance();
+module.exports.create = function(handlebars) {
+  return new Instance(handlebars);
+};