adding WikiWords to the wiki and allowing for users to make new pages if they do not exist by using a title

git-svn-id: http://svn.barleysodas.com/barleysodas/trunk@76 0f7b21a7-9e3a-4941-bbeb-ce5c7c368fa7

app/controllers/application.rb

@@ -1,9 +1,12 @@
 class ApplicationController < ActionController::Base
   session :session_key => '_barleysodas_session_id'
+  
   append_before_filter :block_prefetching_links
   append_before_filter :authorized?
   append_before_filter :set_current_people_id
+  
   helper_method :logged_in?
+  
   cattr_accessor :current_people_id
   
   ##
@@ -21,23 +24,6 @@ class ApplicationController < ActionController::Base
     return !session[:people_title].nil?
   end
   
-  ##
-  # Saves the request uri in the session for later redirect after a login.
-  #
-  def save_request_url
-    session[:request_url] = request.request_uri
-  end
-  
-  ##
-  # Checks to see if the currently requested uri is the same as the uri saved
-  # in the session.
-  #
-  def already_saved_request_url
-    return true if session[:request_url] and
-      session[:request_url] == request.request_uri
-    false
-  end
-  
   ##
   # Determines if a user can access an action.
   #
@@ -45,16 +31,15 @@ class ApplicationController < ActionController::Base
     return true if has_permission_for_action?
     respond_to do |format|
       format.html {
-        # prevent double-redirects to the login page if for some reason it is
-        # not allowed
-        unless logged_in? and !already_saved_request_url
-          save_request_url
+        if !logged_in?
+          session[:request_url] = request.request_uri
           redirect_to new_session_path
           return
         end
         @content_title = 'Forbidden'
         @secondary_title = ''
         @hide_sidebar = true
+        session[:request_url] = nil if !logged_in?
         render :template => 'shared/unauthorized'
       }
       format.xml { render :nothing => true, :status => 403 }
@@ -81,13 +66,64 @@ class ApplicationController < ActionController::Base
   end
   
   ##
-  # Sets the <tt>@page</tt> variable to allow discussions. This should probably
+  # Sets the +@page+ variable to allow discussions. This should probably
   # have some kind of permission availability check later on.
   #
   def allow_page_discussions
     @page.allow_discussions = true
   end
   
+  protected
+  
+  ##
+  # Finds an object model for the particular resource requested. This will be
+  # used to find any model in the current pattern and maybe even the associated
+  # Page model.
+  #
+  def fetch_model
+    # where
+    obj_type = params[:controller]
+    # what
+    tfu = Page.title_from_url(params[:id])
+    
+    # conditions for find
+    cond_ary = [
+      'title = :model_title'
+    ]
+    cond_var = {
+      :model_title => tfu,
+      :help_owner_type => 'Help'
+    }
+    # specific overrides for help, this has an owner type but it is just a Page
+    if obj_type == 'help'
+      cond_ary << 'owner_type = :help_owner_type'
+      obj_type = 'pages'
+    elsif obj_type == 'pages'
+      cond_ary << 'owner_type IS NULL'
+    end
+    # the eventual name of the instance variable, like +@page+
+    obj_name = obj_type.singularize
+    
+    # find the object
+    obj = Class.class_eval(obj_name.camelize).find(:first,
+      :conditions => [ cond_ary.join(' AND '), cond_var ])
+    
+    # allow the chance to make a new one if you GET the URL
+    if request.get? and obj.nil?
+      flash[:info] = "The #{obj_name} was not found, would you like to make it?"
+      redirect_to :action => 'new', :new_title => tfu
+      return
+    elsif obj.nil?
+      # fail if not found
+      raise ActiveRecord::RecordNotFound.new
+    end
+    # set the class variable
+    instance_variable_set("@#{obj_name}", obj)
+    # set the associated page if necessary
+    @page = obj.page if obj.respond_to?('page')
+    true
+  end
+  
   private
   
   ##

app/controllers/autocomplete_controller.rb

@@ -24,4 +24,14 @@ class AutocompleteController < ApplicationController
         "%#{params[key][@value].downcase}%" ])
     render :partial => 'autocomplete/results'
   end
+  
+  protected
+  
+  ##
+  # Allow pretty much everybody in here. Most likely this will not be able to
+  # be misused. At least not right now.
+  #
+  def authorized?
+    true
+  end
 end

app/controllers/beers_controller.rb

@@ -1,6 +1,6 @@
 class BeersController < ApplicationController
-  append_before_filter :get_beer_and_page, :only => [ :show, :edit, :update,
-    :destroy ]
+  append_before_filter :fetch_model,
+    :only => [ :show, :edit, :update, :destroy ]
   
   # GET /beers
   # GET /beers.xml
@@ -32,6 +32,7 @@ class BeersController < ApplicationController
   def new
     @secondary_title = 'Create a new beer'
     @beer = Beer.new
+    @beer.title = params[:new_title] if params[:new_title]
     @page = Page.new
   end
   
@@ -91,16 +92,4 @@ class BeersController < ApplicationController
       format.xml  { head :ok }
     end
   end
-  
-  protected
-  
-  ##
-  # Fetches the Beer and Page model for the actions.
-  #
-  def get_beer_and_page
-    @beer = Beer.find_by_title(Page.title_from_url(params[:id]),
-      :include => [ 'page' ])
-    raise ActiveRecord::RecordNotFound.new if @beer.nil?
-    @page = @beer.page
-  end
 end

app/controllers/breweries_controller.rb

@@ -1,6 +1,6 @@
 class BreweriesController < ApplicationController
-  append_before_filter :get_brewery_and_page, :only => [ :show, :edit, :update,
-    :destroy ]
+  append_before_filter :fetch_model,
+    :only => [ :show, :edit, :update, :destroy ]
   
   # GET /breweries
   # GET /breweries.xml
@@ -31,6 +31,7 @@ class BreweriesController < ApplicationController
   # GET /breweries/new
   def new
     @brewery = Brewery.new
+    @brewery.title = params[:new_title] if params[:new_title]
     @page = Page.new
   end
   
@@ -84,13 +85,4 @@ class BreweriesController < ApplicationController
       format.xml  { head :ok }
     end
   end
-  
-  protected
-  
-  def get_brewery_and_page
-    @brewery = Brewery.find_by_title(Page.title_from_url(params[:id]),
-      :include => [ 'page' ])
-    raise ActiveRecord::RecordNotFound.new if @brewery.nil?
-    @page = @brewery.page
-  end
 end

app/controllers/help_controller.rb

@@ -1,8 +1,9 @@
 class HelpController < ApplicationController
-  append_before_filter :fetch_page, :only => [ :show, :edit, :update, :destroy ]
+  append_before_filter :fetch_model,
+    :only => [ :show, :edit, :update, :destroy ]
   
-  # GET /helps
-  # GET /helps.xml
+  # GET /help
+  # GET /help.xml
   def index
     @page = Page.find_by_title_and_owner_type 'HomePage', 'Help'
     @content_title = 'BarleySodas Help'
@@ -11,8 +12,8 @@ class HelpController < ApplicationController
       :owner_type => 'Help')
   end
   
-  # GET /helps/1
-  # GET /helps/1.xml
+  # GET /help/1
+  # GET /help/1.xml
   def show
     @secondary_title = ''
     respond_to do |format|
@@ -21,19 +22,20 @@ class HelpController < ApplicationController
     end
   end
   
-  # GET /helps/new
+  # GET /help/new
   def new
     @page = Page.new
+    @page.title = params[:new_title] if params[:new_title]
     @secondary_title = 'Creating help page'
   end
   
-  # GET /helps/1;edit
+  # GET /help/1;edit
   def edit
     @secondary_title = 'Updating help page'
   end
   
-  # POST /helps
-  # POST /helps.xml
+  # POST /help
+  # POST /help.xml
   def create
     @page = Page.new(params[:page])
     @page.owner_type = 'Help'
@@ -59,8 +61,8 @@ class HelpController < ApplicationController
     end
   end
   
-  # PUT /helps/1
-  # PUT /helps/1.xml
+  # PUT /help/1
+  # PUT /help/1.xml
   def update
     @page.attributes = params[:page]
     respond_to do |format|
@@ -84,8 +86,8 @@ class HelpController < ApplicationController
     end
   end
   
-  # DELETE /helps/1
-  # DELETE /helps/1.xml
+  # DELETE /help/1
+  # DELETE /help/1.xml
   def destroy
     @page.destroy
     respond_to do |format|
@@ -93,12 +95,4 @@ class HelpController < ApplicationController
       format.xml  { head :ok }
     end
   end
-  
-  protected
-  
-  def fetch_page
-    @page = Page.find_by_title_and_owner_type(Page.title_from_url(params[:id]),
-      'Help')
-    raise ActiveRecord::RecordNotFound.new if @page.nil?
-  end
 end

app/controllers/pages_controller.rb

@@ -1,10 +1,11 @@
 class PagesController < ApplicationController
-  append_before_filter :fetch_page, :only => [ :show, :edit, :update, :destroy ]
+  append_before_filter :fetch_model,
+    :only => [ :show, :edit, :update, :destroy ]
   
   # GET /pages
   # GET /pages.xml
   def index
-    @page = Page.find_by_title 'HomePage'
+    @page = Page.find_by_title_and_owner_type 'HomePage', nil
     @page ||= Page.create :title => 'HomePage',
       :redcloth => 'Welcome to BarleySodas!'
     @content_title = 'The Beer Wiki'
@@ -15,7 +16,7 @@ class PagesController < ApplicationController
     @pages, @wiki_pages = paginate :page, :per_page => 25,
       :order => 'title ASC', :conditions => [ cond_ary.join(' AND ') ]
     
-    @tags = Page.tags(:limit => 25, :order => "name DESC")
+    @tags = Page.tags(:limit => 25, :order => "name ASC")
     
     respond_to do |format|
       format.html # index.rhtml
@@ -34,6 +35,7 @@ class PagesController < ApplicationController
   # GET /pages/new
   def new
     @page = Page.new
+    @page.title = params[:new_title] if params[:new_title]
   end
   
   # GET /pages/1;edit
@@ -65,7 +67,13 @@ class PagesController < ApplicationController
     respond_to do |format|
       if @page.save
         flash[:notice] = 'Page was successfully updated.'
-        format.html { redirect_to page_url({ :id => @page.title_for_url }) }
+        format.html {
+          if @page.title == 'HomePage'
+            redirect_to pages_url
+          else
+            redirect_to page_url({ :id => @page.title_for_url })
+          end
+        }
         format.xml  { head :ok }
       else
         format.html { render :action => "edit" }
@@ -90,11 +98,4 @@ class PagesController < ApplicationController
   def default_action
     redirect_to(pages_path)
   end
-  
-  protected
-  
-  def fetch_page
-    @page = Page.find_by_title(Page.title_from_url(params[:id]))
-    raise ActiveRecord::RecordNotFound.new if @page.nil?
-  end
 end

app/controllers/peoples_controller.rb

@@ -1,6 +1,6 @@
 class PeoplesController < ApplicationController
-  append_before_filter :fetch_people_and_page, :only => [ :show, :edit,
-    :update, :destroy ]
+  append_before_filter :fetch_model,
+    :only => [ :show, :edit, :update, :destroy ]
   
   # GET /peoples
   # GET /peoples.xml
@@ -30,6 +30,7 @@ class PeoplesController < ApplicationController
   def new
     @secondary_title = 'Sign up for BarleySodas!'
     @people = People.new
+    @people.title = params[:new_title] if params[:new_title]
     @page = Page.new
   end
   
@@ -87,13 +88,6 @@ class PeoplesController < ApplicationController
   
   protected
   
-  def fetch_people_and_page
-    @people = People.find_by_title(Page.title_from_url(params[:id]),
-      :include => [ 'page' ])
-    raise ActiveRecord::RecordNotFound.new if @people.nil?
-    @page = @people.page
-  end
-  
   def set_people_role
     # set checks here for valid role assignment
     if params[:people] and params[:people][:role_id]

app/controllers/sessions_controller.rb

@@ -39,4 +39,13 @@ class SessionsController < ApplicationController
     reset_session
     redirect_to '/'
   end
+  
+  protected
+  
+  ##
+  # Always allow People to log in and out of the system.
+  #
+  def authorized?
+    true
+  end
 end

app/helpers/application_helper.rb

@@ -68,4 +68,29 @@ module ApplicationHelper
   def tag_cloud_styles
     %w(tag_cloud_1 tag_cloud_2 tag_cloud_3 tag_cloud_4 tag_cloud_5)
   end
+  
+  ##
+  # Replaces a WikiWord link with a link to a Page, if it exists.
+  #
+  def replace_wiki_words(str)
+    str.gsub(/\[\[([A-Za-z0-9 \\]+)\]\]/) do |match|
+      c_string, page_string = params[:controller], $1
+      if $1.match(/\\/)
+        ary = $1.split(/\\/)
+        c_string, page_string = ary.first, ary.last
+      end
+      owner_type = c_string.singularize.humanize
+      res = ''
+      if Page.exists?(page_string, owner_type)
+        res = link_to(page_string, { :controller => c_string, :action => :show,
+          :id => page_string.gsub(/ /, '_') },
+          { :title => "View #{page_string}" })
+      else
+        res = link_to(page_string, { :controller => c_string,
+          :action => :new, :new_title => page_string },
+          { :title => "Create #{page_string}" }) + '?'
+      end
+      res
+    end
+  end
 end

app/models/page.rb

@@ -67,6 +67,25 @@ class Page < ActiveRecord::Base
     tags = Tag.find_by_sql(query)
   end
   
+  ##
+  # Determines if a Page exists.
+  #
+  def self.exists?(page_name, owner_type = nil)
+    cond_ary = [
+      'title = :page_name'
+    ]
+    cond_var = {
+      :page_name => page_name,
+      :owner_type => owner_type
+    }
+    if owner_type.nil? or owner_type == 'Page'
+      cond_ary << 'owner_type IS NULL'
+    else
+      cond_ary << 'owner_type = :owner_type'
+    end
+    self.count(:conditions => [ cond_ary.join(' AND '), cond_var ]) > 0
+  end
+  
   protected
   
   ##
@@ -74,7 +93,7 @@ class Page < ActiveRecord::Base
   #
   def set_created_person
     self[:created_by] = ApplicationController.current_people_id rescue nil
-    self[:created_by] ||= People.penguincoder.id
+    self[:created_by] ||= People.penguincoder.id rescue nil
   end
   
   ##
@@ -82,7 +101,7 @@ class Page < ActiveRecord::Base
   #
   def set_updated_person
     self[:updated_by] = ApplicationController.current_people_id rescue nil
-    self[:updated_by] ||= People.penguincoder.id
+    self[:updated_by] ||= People.penguincoder.id rescue nil
   end
   
   ##
@@ -90,8 +109,8 @@ class Page < ActiveRecord::Base
   #
   def update_html
     # need to filter HTML first... remove <script> and chunks and the like...
-    res = RedCloth.new(strip_tags(self.redcloth.to_s), [ :no_span_caps ])
-    self.html = res.to_html(
+    self.html = RedCloth.new(strip_tags(self.redcloth.to_s),
+      [ :no_span_caps ]).to_html(
       # no link references. messes up lines starting with [[WikiWord]]
       :block_textile_table, :block_textile_lists, :block_textile_prefix,
       :inline_textile_image, :inline_textile_link, :inline_textile_code,
@@ -102,6 +121,6 @@ class Page < ActiveRecord::Base
   # Removes HTML tags from a string
   #
   def strip_tags(str)
-    str.gsub(/\</, "&lt;").gsub(/\>/, "&gt;")
+    str.gsub(/\</, "&lt;").gsub(/\>/, "&gt;").gsub(/\&/, "&amp;")
   end
 end

app/models/people.rb

@@ -7,13 +7,7 @@ class People < ActiveRecord::Base
   attr_protected :role_id
   has_many :created_pages, :class_name => 'Page', :foreign_key => 'created_by'
   has_many :updated_pages, :class_name => 'Page', :foreign_key => 'updated_by'
-  
-  ##
-  # Finds the Guest user for the system.
-  #
-  def self.guest_user
-    self.find_by_title('Guest') rescue nil
-  end
+  validates_uniqueness_of :title
   
   ##
   # Finds me.

app/views/pages/_page.rhtml

@@ -8,10 +8,10 @@
   </div><% end -%>
   <br class="clear" />
   <div class="entry-content">
-    <%= @page.html %>
+    <%= replace_wiki_words(@page.html) %>
   </div>
   <% unless simple -%><ul class="meta">
-    <% if @page.tags.size > 0 -%><li>Tags: <%= @page.tag_names.sort.join(' ') -%></li><% end -%>
+    <% if @page.tags.size > 0 -%><li>Tags: <%= @page.tags.collect { |t| t.name }.sort.join(' ') -%></li><% end -%>
     <li>Version: <%= @page.version -%></li>
     <% @page.owner.page_attributes.each do |x| -%>
     <li><%= x -%></li>

app/views/pages/index.rhtml

@@ -1,4 +1,4 @@
-<%= render :partial => 'page', :locals => { :simple => true } -%>
+<%= render :partial => 'page' -%>
 
 <% unless @wiki_pages.empty? -%>
   <div class="hentry">

db/migrate/002_create_pages.rb

@@ -7,8 +7,12 @@ class CreatePages < ActiveRecord::Migration
       t.column :owner_id, :integer
       t.column :owner_type, :string, :limit => 32
       t.column :version, :integer
+      t.column :created_by, :integer
+      t.column :updated_by, :integer
     end
     add_index :pages, :owner_id
+    add_index :pages, :created_by
+    add_index :pages, :updated_by
     Page.create_versioned_table
   end
 

db/migrate/007_create_peoples.rb

@@ -1,13 +0,0 @@
-class CreatePeoples < ActiveRecord::Migration
-  def self.up
-    create_table :peoples do |t|
-      t.column :title, :string
-    end
-    People.create :title => 'Guest', :page => Page.new
-    People.create :title => 'PenguinCoder', :page => Page.new
-  end
-
-  def self.down
-    drop_table :peoples
-  end
-end

db/migrate/007_create_roles.rb

@@ -7,18 +7,12 @@ class CreateRoles < ActiveRecord::Migration
     end
     add_index :roles, :parent_id
     add_index :roles, :code
-    add_column :peoples, :role_id, :integer
-    add_index :peoples, :role_id
     br = Role.create :code => 'base', :name => 'Base Role'
     ar = Role.create :code => 'admin', :name => 'Administrative Role',
       :parent_id => br.id
-    g = People.guest_user
-    g.role = br
-    g.save
   end
 
   def self.down
     drop_table :roles
-    remove_column :peoples, :role_id
   end
 end

db/migrate/008_create_peoples.rb

@@ -0,0 +1,17 @@
+class CreatePeoples < ActiveRecord::Migration
+  def self.up
+    create_table :peoples do |t|
+      t.column :title, :string
+      t.column :role_id, :integer
+    end
+    add_index :peoples, :title
+    add_index :peoples, :role_id
+    p = People.new :title => 'PenguinCoder', :page => Page.new
+    p.role = Role.admin_role
+    p.save
+  end
+
+  def self.down
+    drop_table :peoples
+  end
+end

db/migrate/010_page_people_ownership.rb

@@ -1,19 +0,0 @@
-class PagePeopleOwnership < ActiveRecord::Migration
-  def self.up
-    add_column :pages, :created_by, :integer
-    add_index :pages, :created_by
-    add_column :pages, :updated_by, :integer
-    add_index :pages, :updated_by
-    add_column :page_versions, :created_by, :integer
-    add_index :page_versions, :created_by
-    add_column :page_versions, :updated_by, :integer
-    add_index :page_versions, :updated_by
-  end
-
-  def self.down
-    remove_column :pages, :created_by
-    remove_column :pages, :updated_by
-    remove_column :page_versions, :created_by
-    remove_column :page_versions, :updated_by
-  end
-end

generate_permissions

@@ -3,9 +3,8 @@ Permission.destroy_all
 base_actions = ApplicationController.action_methods
 # i should probably figure out all of the children of ApplicationController
 # rather than defining them here.
-controllers = [ AutocompleteController, SessionsController, PagesController,
-  PeoplesController, BeersController, BreweriesController, RolesController,
-  DiscussionsController, HelpController ]
+controllers = [ PagesController, HelpController, DiscussionsController,
+  PeoplesController, BeersController, BreweriesController, RolesController ]
 controllers.each do |c|  
   actions = c.action_methods - base_actions
   cname = c.controller_name
@@ -13,31 +12,20 @@ controllers.each do |c|
 end
 
 r = Role.base_role
-Permission.find(:all,
-  :conditions => [ 'controller = ?', 'autocomplete' ]).each do |p|
-  r.permissions << p
-end
-
-Permission.find(:all,
-  :conditions => [ 'controller = ?', 'sessions' ]).each do |p|
-  r.permissions << p
-end
-
 Permission.find(:all,
   :conditions => [ 'controller = ?', 'pages' ]).each do |p|
   next if [ 'new', 'create', 'edit', 'update', 'destroy' ].include?(p.action)
   r.permissions << p
 end
+Permission.find(:all,
+  :conditions => [ 'controller = ?', 'help' ]).each do |p|
+  next if [ 'new', 'create', 'edit', 'update', 'destroy' ].include?(p.action)
+  r.permissions << p
+end
 
 r2 = Role.admin_role
 Permission.find(:all).each do |p|
   r2.permissions << p unless r.permissions.include?(p)
 end
 
-p = People.new :title => 'penguincoder'
-page = Page.new
-p.page = page
-p.role = r2
-p.save
-
 puts "All permissions created"