added wiki page

app/models/artist.rb

@@ -11,7 +11,7 @@ class Artist < ActiveRecord::Base
   has_one :wiki_page, :foreign_key => "title", :primary_key => "name"
   has_one :tag_alias, :foreign_key => "antecedent_name", :primary_key => "name"
   accepts_nested_attributes_for :wiki_page
-  attr_accessible :url_string, :other_names, :group_name, :wiki_page_attributes
+  attr_accessible :name, :url_string, :other_names, :group_name, :wiki_page_attributes
   
   module UrlMethods
     module ClassMethods

app/models/pool.rb

@@ -7,6 +7,7 @@ class Pool < ActiveRecord::Base
   belongs_to :updater, :class_name => "User"
   has_many :versions, :class_name => "PoolVersion", :dependent => :destroy
   after_save :create_version
+  attr_accessible :name, :description, :post_ids, :is_public, :is_active
   
   def self.create_anonymous(creator, creator_ip_addr)
     pool = Pool.create(:name => "TEMP:#{Time.now.to_f}.#{rand(1_000_000)}", :creator => creator, :updater_id => creator.id, :updater_ip_addr => creator_ip_addr)

app/models/wiki_page.rb

@@ -1,3 +1,61 @@
 class WikiPage < ActiveRecord::Base
   attr_accessor :updater_id, :updater_ip_addr
+  before_save :normalize_title
+  after_save :create_version
+  belongs_to :creator, :class_name => "User"
+  belongs_to :updater, :class_name => "User"
+  validates_uniqueness_of :title, :case_sensitive => false
+  validates_presence_of :body, :updater_id, :updater_ip_addr
+  attr_protected :text_search_index, :is_locked, :version
+  scope :titled, lambda {|title| where(["title = ?", title.downcase.tr(" ", "_")])}
+  has_one :tag, :foreign_key => "name", :primary_key => "title"
+  has_one :artist, :foreign_key => "name", :primary_key => "title"
+  has_many :versions, :class_name => "WikiPageVersion"
+  
+  def self.build_relation(options = {})
+    relation = where()
+    
+    if options[:title]
+      relation = relation.where(["title LIKE ? ESCAPE E'\\\\'", options[:title].downcase.tr(" ", "_").to_escaped_for_sql_like])
+    end
+    
+    if options[:creator_id]
+      relation = relation.where(["creator_id = ?", options[:creator_id]])
+    end
+    
+    relation
+  end
+  
+  def revert_to(version)
+    self.title = version.title
+    self.body = version.body
+    self.is_locked = version.is_locked
+  end
+  
+  def revert_to!(version)
+    revert_to(version)
+    save!
+  end
+
+  def normalize_title
+    self.title = title.downcase.tr(" ", "_")
+  end
+
+  def creator_name
+    User.find_name(user_id).tr("_", " ")
+  end
+
+  def pretty_title
+    title.tr("_", " ")
+  end
+  
+  def create_version
+    versions.create(
+      :updater_id => updater_id,
+      :updater_ip_addr => updater_ip_addr,
+      :title => title,
+      :body => body,
+      :is_locked => is_locked
+    )
+  end
 end

app/models/wiki_page_version.rb

@@ -0,0 +1,12 @@
+class WikiPageVersion < ActiveRecord::Base
+  belongs_to :wiki_page
+  belongs_to :updater
+  
+  def updater_name
+    User.find_name(updater_id)
+  end
+
+  def pretty_title
+    title.tr("_", " ")
+  end
+end

app/presenters/wiki_page_presenter.rb

@@ -0,0 +1,53 @@
+class WikiPagePresenter
+  
+  # Produce a formatted page that shows the difference between two versions of a page.
+  def diff(other_version)
+    pattern = Regexp.new('(?:<.+?>)|(?:[0-9_A-Za-z\x80-\xff]+[\x09\x20]?)|(?:[ \t]+)|(?:\r?\n)|(?:.+?)')
+
+    thisarr = self.body.scan(pattern)
+    otharr = other_version.body.scan(pattern)
+
+    cbo = Diff::LCS::ContextDiffCallbacks.new
+    diffs = thisarr.diff(otharr, cbo)
+
+    escape_html = lambda {|str| str.gsub(/&/,'&amp;').gsub(/</,'&lt;').gsub(/>/,'&gt;')}
+
+    output = thisarr;
+    output.each { |q| q.replace(CGI.escape_html(q)) }
+
+    diffs.reverse_each do |hunk|
+      newchange = hunk.max{|a,b| a.old_position <=> b.old_position}
+      newstart = newchange.old_position
+      oldstart = hunk.min{|a,b| a.old_position <=> b.old_position}.old_position
+
+      if newchange.action == '+'
+        output.insert(newstart, "</ins>")
+      end
+
+      hunk.reverse_each do |chg|
+        case chg.action
+        when '-'
+          oldstart = chg.old_position
+          output[chg.old_position] = "" if chg.old_element.match(/^\r?\n$/)
+        when '+'
+          if chg.new_element.match(/^\r?\n$/)
+            output.insert(chg.old_position, "[nl]")
+          else
+            output.insert(chg.old_position, "#{escape_html[chg.new_element]}")
+          end
+        end
+      end
+
+      if newchange.action == '+'
+        output.insert(newstart, "<ins>")
+      end
+
+      if hunk[0].action == '-'
+        output.insert((newstart == oldstart || newchange.action != '+') ? newstart+1 : newstart, "</del>")
+        output.insert(oldstart, "<del>")
+      end
+    end
+
+    output.join.gsub(/\r?\n/, "[nl]")
+  end
+end