antville/code/HopObject/HopObject.js

//
// The Antville Project
// http://code.google.com/p/antville
//
// Copyright 2001-2007 by The Antville People
//
// Licensed under the Apache License, Version 2.0 (the ``License'');
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an ``AS IS'' BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// $Revision$
// $LastChangedBy$
// $LastChangedDate$
// $URL$
//

/**
 * @fileOverview Defines the extensions of Helma’s built-in 
 * HopObject prototype.
 */

/**
 * 
 * @param {HopObject} collection
 * @param {Object} options Optional flags, e.g. to force or prevent any  
 * conditional checks of individual prototype’s remove() methods
 */
HopObject.remove = function(options) {
   var item;
   while (this.size() > 0) {
      item = this.get(0);
      if (item.constructor.remove) {
         item.constructor.remove.call(item, options);
      } else if (!options) {
         item.remove();
      } else {
         throw Error("Missing static " + item.constructor.name + 
               ".remove() method");
      }
   }
   return;
}

/**
 * 
 * @param {String} name
 * @param {HopObject} collection
 */
HopObject.getFromPath = function(name, collection) {
   if (name) {
      var site;
      if (name.contains("/")) {
         var parts = name.split("/");
         site = root.get(parts[0]);
         name = parts[1];
      } else {
         site = res.handlers.site;
      }
      if (site && site.getPermission("main")) {
         return site[collection].get(name);
      }
   }
   return null;
}

/**
 * Helma’s built-in HopObject with Antville’s extensions.
 * @name HopObject
 * @constructor
 */

/**
 * 
 * @param {Object} values
 */
HopObject.prototype.map = function(values) {
   for (var i in values) {
      this[i] = values[i];
   }
   return;
}

/**
 * 
 */
HopObject.prototype.onRequest = function() {
   // Checking if we are on the correct host to prevent at least some XSS issues
   if (req.action !== "notfound" && req.action !== "error" && 
         this.href().startsWith("http://") && 
         !this.href().toLowerCase().startsWith(req.servletRequest.scheme + 
         "://" + req.servletRequest.serverName.toLowerCase())) {   
      res.redirect(this.href(req.action === "main" ? String.EMPTY : req.action));
   }

   User.autoLogin();
   res.handlers.membership = User.getMembership();
   
   if (User.getCurrentStatus() === User.BLOCKED) {
      session.data.status = 403;
      session.data.error = gettext("Your account has been blocked.") + String.SPACE + 
            gettext("Please contact an administrator for further information.");
      User.logout();
      res.redirect(root.href("error"));
   }
   
   if (res.handlers.site.status === Site.BLOCKED && 
         !User.require(User.PRIVILEGED)) {
      session.data.status = 403;
      session.data.error = gettext("The site you requested has been blocked.") +
            String.SPACE + gettext("Please contact an administrator for further information.");
      res.redirect(root.href("error"));
   }
   
   res.handlers.layout = res.handlers.site.layout || new Layout;
   res.skinpath = res.handlers.layout.getSkinPath();

   if (!this.getPermission(req.action)) {
      if (!session.user) {
         User.setLocation(root.href() + req.path);
         res.message = gettext("Please login first.");
         res.redirect(res.handlers.site.members.href("login"));
      }
      User.getLocation();
      res.status = 401;
      res.data.title = gettext("{0} 401 Error", root.title);
      res.data.body = root.renderSkinAsString("$Root#error", {error: 
            gettext("You are not allowed to access this part of the site.")});
      res.handlers.site.renderSkin("Site#page");
      session.data.error = null;
      res.stop();
   }

   res.meta.values = {};
   res.handlers.site.renderSkinAsString("Site#values");
   return;
}

/**
 * @returns Boolean
 */
HopObject.prototype.getPermission = function() {
   return true;
}

// Marking some prototype names used in res.message of HopObject.delete_action()
markgettext("Comment");
markgettext("File");
markgettext("Image");
markgettext("Membership");
markgettext("Poll");
markgettext("Story");

HopObject.prototype.delete_action = function() {
   if (req.postParams.proceed) {
      try {
         var parent = this._parent;
         var url = this.constructor.remove.call(this, req.postParams) || 
               parent.href();
         res.message = gettext("{0} was successfully deleted.", gettext(this._prototype));
         res.redirect(User.getLocation() || url);
      } catch(ex) {
         res.message = ex;
         app.log(ex);
      }
   }

   res.data.action = this.href(req.action);
   res.data.title = gettext("Confirm Deletion");
   res.data.body = this.renderSkinAsString("$HopObject#confirm", {
      text: this.getConfirmText()
   });
   res.handlers.site.renderSkin("Site#page");
   return;
}

/**
 * @returns {Object}
 */
HopObject.prototype.touch = function() {
   return this.map({
      modified: new Date,
      modifier: session.user
   });
}

/**
 * 
 */
HopObject.prototype.log = function() {
   var entry = new LogEntry(this, "main");
   app.data.entries.push(entry);
   return;
}

/**
 * 
 * @param {String} action
 */
HopObject.prototype.notify = function(action) {
   var self = this;
   var site = res.handlers.site;
   
   var getPermission = function(scope, mode, status) {
      if (scope === Admin.NONE || mode === Site.NOBODY || 
            status === Site.BLOCKED) {
         return false;
      }
      var scopes = [Admin.REGULAR, Admin.TRUSTED];
      if (scopes.indexOf(status) < scopes.indexOf(scope)) {
         return false;
      }
      if (!Membership.require(mode)) {
         return false;
      }
      return true;
   }
   
   // Helper method for debugging
   var renderMatrix = function() {
      var buf = ['<table border=1 cellspacing=0>'];
      for each (var scope in Admin.getNotificationScopes()) {
         for each (var mode in Site.getNotificationModes()) {
            for each (var status in Site.getStatus()) {
               var perm = getPermission(scope.value, mode.value, status.value);
               buf.push('<tr style="');
               perm && buf.push('color: blue;');
               if (scope.value === root.notificationScope && mode.value === 
                     site.notificationMode && status.value === site.status) {
                  buf.push(' background-color: yellow;');
               }
               buf.push('">');
               buf.push('<td>', scope.value, '</td>');
               buf.push('<td>', status.value, '</td>');
               buf.push('<td>', mode.value, '</td>');
               buf.push('<td>', perm, '</td>');
               buf.push('</tr>');
            }
         }
      }
      buf.push('</table>');
      res.write(buf.join(""));
      return;
   }

   switch (action) {
      case "comment":
      action = "create"; break;
   }

   var currentMembership = res.handlers.membership;
   site.members.forEach(function() {
      var membership = res.handlers.membership = this;
      if (getPermission(root.notificationScope, site.notificationMode, site.status)) {
         sendMail(membership.creator.email, gettext("[{0}] Notification of site changes", 
               root.title), self.renderSkinAsString("$HopObject#notify_" + action));
      }
   });
   res.handlers.membership = currentMembership;
   return;
}

/**
 * @returns {Tag[]}
 */
HopObject.prototype.getTags = function() {
   var tags = [];
   if (typeof this.tags === "object") {
      this.tags.list().forEach(function(item) {
         item.tag && tags.push(item.tag.name);
      });
   }
   return tags;
}

/**
 * 
 * @param {Tag[]|String} tags
 */
HopObject.prototype.setTags = function(tags) {
   if (typeof this.tags !== "object") {
      return String.EMPTY;
   }

   if (!tags) {
      tags = [];
   } else if (tags.constructor === String) {
      tags = tags.split(/\s*,\s*/);
   }
   
   var diff = {};
   var tag;
   for (var i in tags) {
      // Trim and remove troublesome characters  (like ../.. etc.)
      // We call getAccessName with a virgin HopObject to allow most names
      tag = tags[i] = this.getAccessName.call(new HopObject, File.getName(tags[i]));
      if (tag && diff[tag] == null) {
         diff[tag] = 1;
      }
   }
   this.tags.forEach(function() {
      if (!this.tag) {
         return;
      }
      diff[this.tag.name] = (tags.indexOf(this.tag.name) < 0) ? this : 0;
   });
   
   for (var tag in diff) {
      switch (diff[tag]) {
         case 0:
         // Do nothing (tag already exists)
         break;
         case 1:
         // Add tag to story
         this.addTag(tag);
         break;
         default:
         // Remove tag
         this.removeTag(diff[tag]);
      }
   }
   return;
}

/**
 * 
 * @param {String} name
 */
HopObject.prototype.addTag = function(name) {
   this.tags.add(new TagHub(name, this, session.user));
   return;
}

/**
 * 
 * @param {String} tag
 */
HopObject.prototype.removeTag = function(tag) {
   var parent = tag._parent;
   if (parent.size() === 1) {
      parent.remove();
   }
   tag.remove();
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.skin_macro = function(param, name) {
   if (!name) {
      return;
   }
   if (name.contains("#")) {
      this.renderSkin(name);
   } else {
      var prototype = this._prototype || "Global";
      this.renderSkin(prototype + "#" + name);
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.input_macro = function(param, name) {
   param.name = name;
   param.id = name;
   param.value = this.getFormValue(name);
   return html.input(param);
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.textarea_macro = function(param, name) {
   param.name = name;
   param.id = name;
   param.value = this.getFormValue(name);
   return html.textArea(param);
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.select_macro = function(param, name) {
   param.name = name;
   param.id = name;
   var options = this.getFormOptions(name);
   if (options.length < 2) {
      param.disabled = "disabled";
   }
   return html.dropDown(param, options, this.getFormValue(name));
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.checkbox_macro = function(param, name) {
   param.name = name;
   param.id = name;
   var options = this.getFormOptions(name);
   if (options.length < 2) {
      param.disabled = "disabled";
   }
   param.value = String((options[1] || options[0]).value);
   param.selectedValue = String(this.getFormValue(name));
   var label = param.label;
   delete param.label;
   html.checkBox(param);
   if (label) {
      html.element("label", label, {"for": name});
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.radiobutton_macro = function(param, name) {
   param.name = name;
   param.id = name;
   var options = this.getFormOptions(name);
   if (options.length < 2) {
      param.disabled = "disabled";
   }
   param.value = String(options[0].value);
   param.selectedValue = String(this.getFormValue(name));
   var label = param.label;
   delete param.label;
   html.radioButton(param);
   if (label) {
      html.element("label", label, {"for": name});
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} name
 */
HopObject.prototype.upload_macro = function(param, name) {
   param.name = name;
   param.id = name;
   param.value = this.getFormValue(name);
   renderSkin("$Global#upload", param);
   return;
}

/**
 * 
 * @param {Object} param
 * @param {HopObject} [handler]
 */
HopObject.prototype.macro_macro = function(param, handler) {
   var ctor = this.constructor;
   if ([Story, Image, File, Poll].indexOf(ctor) > -1) {
      res.encode("<% ");
      res.write(handler || ctor.name.toLowerCase());
      res.write(String.SPACE);
      res.write(quote(this.name || this._id));
      res.encode(" %>");
   }
   return;
}

/**
 * 
 */
HopObject.prototype.kind_macro = function() {
   var type = this.constructor.name.toLowerCase();
   switch (type) {
      default:
      res.write(gettext(type));
      break;
   }
   return;
}

/**
 * 
 * @param {String} name
 * @returns {Number|String}
 */
HopObject.prototype.getFormValue = function(name) {
   if (req.isPost()) {
      return req.postParams[name];
   } else {
      var value = this[name] || req.queryParams[name] || String.EMPTY;
      return value instanceof HopObject ? value._id : value;
   }
}

/**
 * @returns {Object[]}
 */
HopObject.prototype.getFormOptions = function() {
   return [{value: true, display: "enabled"}];
}

/**
 * @returns {HopObject}
 * @param {Object} param
 * @param {String} property
 */
HopObject.prototype.self_macro = function(param, property) {
   return property ? this[property] : this;
}

/**
 * 
 */
HopObject.prototype.type_macro = function() {
   return res.write(this.constructor.name);
}

/**
 * 
 * @param {Object} param
 * @param {String} url
 * @param {String} text
 */
HopObject.prototype.link_macro = function(param, url, text) {
   if (url && text) {
      var action = url.split(/#|\?/)[0];
      if (this.getPermission(action)) {
         renderLink.call(global, param, url, text, this);
      }
   } else {
      res.write("[Insufficient link parameters]");
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} format
 */
HopObject.prototype.created_macro = function(param, format) {
   if (this.isPersistent()) {
      format || (format = param.format);
      res.write(formatDate(this.created, format));
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} format
 */
HopObject.prototype.modified_macro = function(param, format) {
   if (this.isPersistent()) {
      format || (format = param.format);
      res.write(formatDate(this.modified, format));
   }
   return;
}

/**
 * 
 * @param {Object} param
 * @param {String} mode
 */
HopObject.prototype.creator_macro = function(param, mode) {
   if (!this.creator || this.isTransient()) {
      return;
   }
   mode || (mode = param.as);
   if (mode === "link" && this.creator.url) {
      html.link({href: this.creator.url}, this.creator.name);
   } else if (mode === "url") {
      res.write(this.creator.url);
   } else {
      res.write(this.creator.name);
   } return;
}

/**
 * 
 * @param {Object} param
 * @param {String} mode
 */
HopObject.prototype.modifier_macro = function(param, mode) {
   if (!this.modifier || this.isTransient()) {
      return;
   }
   mode || (mode = param.as);
   if (mode === "link" && this.modifier.url) {
      html.link({href: this.modifier.url}, this.modifier.name);
   } else if (mode === "url") {
      res.write(this.modifier.url);
   } else {
      res.write(this.modifier.name);
   }
   return;
}

/**
 * @returns {String}
 */
HopObject.prototype.getTitle = function() {
   return this.title || gettext(this.__name__.capitalize());
}

/**
 * @returns {String}
 */
HopObject.prototype.toString = function() {
   return this.constructor.name + " #" + this._id;
}

/**
 * 
 * @param {String} text
 * @param {Object} param
 * @param {String} action
 * @returns {String}
 */
HopObject.prototype.link_filter = function(text, param, action) {
   action || (action = ".");
   res.push();
   renderLink(param, action, text, this);
   return res.pop();
}