major refactoring of post sets and pagination, incomplete

app/controllers/posts_controller.rb

@@ -4,7 +4,7 @@ class PostsController < ApplicationController
   respond_to :html, :xml, :json
   
   def index
-    @post_set = PostSets::Post.new(params[:tags], :page => params[:page], :before_id => params[:before_id])
+    @post_set = PostSets::Post.new(params[:tags], params)
     respond_with(@post_set)
   end
   

app/helpers/pagination_helper.rb

@@ -0,0 +1,78 @@
+module PaginationHelper
+  def smart_paginator(set, &block)
+    if set.page && set.page > 1000
+      sequential_paginator(set)
+    else
+      numbered_paginator(set, &block)
+    end
+  end
+  
+  def sequential_paginator(set)
+    html = "<menu>"
+    
+    unless set.first_page?
+      html << '<li>' + link_to("&laquo; Previous", params.merge(:after_id => set.first_id)) + '</li>'
+    end
+    
+    unless set.last_page?
+      html << '<li>' + link_to("Next &raquo;", params.merge(:before_id => set.last_id)) + '</li>'
+    end
+    
+    html << "</menu>"
+    html.html_safe
+  end
+  
+  def numbered_paginator(set, &block)
+    html = "<menu>"
+    window = 3
+    if set.total_pages <= (window * 2) + 5
+      1.upto(set.total_pages) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+    elsif set.current_page <= window + 2
+      1.upto(set.current_page + window) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+      html << numbered_paginator_item("...", set.current_page, &block)
+      html << numbered_paginator_final_item(set.total_pages, set.current_page, &block)
+    
+    elsif set.current_page >= set.total_pages - (window + 1)
+      html << numbered_paginator_item(1, set.current_page, &block)
+      html << numbered_paginator_item("...", set.current_page, &block)
+      (set.current_page - window).upto(set.total_pages) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+    else
+      html << numbered_paginator_item(1, set.current_page, &block)
+      html << numbered_paginator_item("...", set.current_page, &block)
+      (set.current_page - window).upto(set.current_page + window) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+      html << numbered_paginator_item("...", set.current_page, &block)
+      html << numbered_paginator_final_item(set.total_pages, set.current_page, &block)
+    end
+    html << "</menu>"
+    html.html_safe
+  end
+  
+  def numbered_paginator_final_item(total_pages, current_page, &block)
+    if total_pages <= 1000
+      numbered_paginator_item(total_pages, current_page, &block)
+    else
+      ""
+    end
+  end
+  
+  def numbered_paginator_item(page, current_page, &block)
+    html = "<li>"
+    if page == "..."
+      html << "..."
+    elsif page == current_page
+      html << page.to_s
+    else
+      html << capture(page, &block)
+    end
+    html << "</li>"
+    html.html_safe
+  end
+end

app/logical/favorite.rb

@@ -5,6 +5,20 @@ class Favorite
     "favorites_#{user_id.to_i % 10}"
   end
   
+  def self.sql_order_clause(post_ids, posts_table_alias = "posts")
+    if post_ids.empty?
+      return "#{posts_table_alias}.id desc"
+    end
+
+    conditions = []
+    
+    post_ids.each_with_index do |post_id, n|
+      conditions << "when #{post_id} then #{n}"
+    end
+    
+    "case #{posts_table_alias}.id " + conditions.join(" ") + " end"
+  end
+  
   def self.create(attributes)
     user_id = attributes[:user_id]
     post_id = attributes[:post_id]
@@ -26,6 +40,19 @@ class Favorite
       destroy_for_post(conditions[:post_id])
     end
   end
+  
+  def self.find_post_ids(user_id, options)
+    limit = options[:limit] || 1 || Danbooru.config.posts_per_page
+    if options[:before_id]
+      select_values_sql("SELECT post_id FROM #{table_name_for(user_id)} WHERE id < ? ORDER BY id DESC LIMIT ?", options[:before_id], limit)
+    elsif options[:after_id]
+      select_values_sql("SELECT post_id FROM #{table_name_for(user_id)} WHERE id > ? ORDER BY id ASC LIMIT ?", options[:after_id], limit).reverse
+    elsif options[:offset]
+      select_values_sql("SELECT post_id FROM #{table_name_for(user_id)} ORDER BY id DESC LIMIT ? OFFSET ?",  limit, options[:offset])
+    else
+      select_values_sql("SELECT post_id FROM #{table_name_for(user_id)} ORDER BY id DESC LIMIT ?", limit)
+    end
+  end
 
   def self.exists?(conditions)
     if conditions[:user_id] && conditions[:post_id]
@@ -39,26 +66,30 @@ class Favorite
     end
   end
 
-  private
-    def self.destroy_for_post_and_user(post_id, user_id)
-      execute_sql("DELETE FROM #{table_name_for(user_id)} WHERE post_id = #{post_id} AND user_id = #{user_id}")
-    end
-  
-    def self.destroy_for_post(post)
-      0.upto(9) do |i|
-        execute_sql("DELETE FROM favorites_#{i} WHERE post_id = #{post.id}")
-      end
-    end
-  
-    def self.destroy_for_user(user)
-      execute_sql("DELETE FROM #{table_name_for(user)} WHERE user_id = #{user.id}")
-    end
-  
-    def self.select_value_sql(sql, *params)
-      ActiveRecord::Base.select_value_sql(sql, *params)
-    end
-  
-    def self.execute_sql(sql, *params)
-      ActiveRecord::Base.execute_sql(sql, *params)
+  def self.destroy_for_post_and_user(post_id, user_id)
+    execute_sql("DELETE FROM #{table_name_for(user_id)} WHERE post_id = #{post_id} AND user_id = #{user_id}")
+  end
+
+  def self.destroy_for_post(post)
+    0.upto(9) do |i|
+      execute_sql("DELETE FROM favorites_#{i} WHERE post_id = #{post.id}")
     end
+  end
+
+  def self.destroy_for_user(user)
+    execute_sql("DELETE FROM #{table_name_for(user)} WHERE user_id = #{user.id}")
+  end
+
+  def self.select_value_sql(sql, *params)
+    ActiveRecord::Base.select_value_sql(sql, *params)
+  end
+
+  def self.select_values_sql(sql, *params)
+    ActiveRecord::Base.select_values_sql(sql, *params)
+  end
+
+  def self.execute_sql(sql, *params)
+    ActiveRecord::Base.execute_sql(sql, *params)
+  end
 end
+

app/logical/post_sets/base.rb

@@ -1,45 +1,78 @@
+# A PostSet represents a paginated slice of posts. It is used in conjunction
+# with the helpers to render the paginator.
+#
+# Usage:
+#
+# @post_set = PostSets::Base.new(params)
+# @post_set.extend(PostSets::Sequential)
+# @post_set.extend(PostSets::Post)
+
 module PostSets
   class Base
-    attr_accessor :page, :before_id, :count, :posts
-  
-    def initialize(options = {})
-      @page = options[:page] ? options[:page].to_i : 1
-      @before_id = options[:before_id]
-      load_posts
+    attr_reader :params, :posts
+    delegate :to_xml, :to_json, :to => :posts
+    
+    def initialize(params)
+      @params = params
     end
     
-    def has_wiki?
-      false
-    end
-  
-    def use_sequential_paginator?
-      !use_numbered_paginator?
-    end
-  
-    def use_numbered_paginator?
-      before_id.nil?
-    end
-  
-    def load_posts
+    # Should a return a paginated array of posts. This means it should have
+    # at most <limit> elements.
+    def posts
       raise NotImplementedError
     end
-  
-    def to_xml
-      posts.to_xml
+    
+    # Does this post set have a valid wiki page representation?
+    def has_wiki?
+      raise NotImplementedError
     end
-  
-    def to_json
-      posts.to_json
+    
+    # Should return an array of strings representing the tags.
+    def tags
+      raise NotImplementedError
     end
-  
+
+    # Given an ActiveRelation object, perform the necessary pagination to
+    # extract at most <limit> elements. Should return an array.
+    def slice(relation)
+      raise NotImplementedError
+    end
+    
+    # For cases where we're not relying on the default pagination 
+    # implementation (for example, if the ids are cached in a string)
+    # then pass in the offset/before_id/after_id parameters here.
+    def pagination_options
+      raise NotImplementedError
+    end
+    
+    # This method should throw an exception if for whatever reason the query
+    # is invalid or forbidden.
+    def validate
+    end
+    
+    # Clear out any memoized instance variables.
+    def reload
+      @posts = nil
+      @presenter = nil
+      @tag_string = nil
+    end
+
+    def tag_string
+      @tag_string ||= tags.join(" ")
+    end
+    
+    def is_first_page?
+      raise NotImplementedError
+    end
+    
+    def is_last_page?
+      posts.size == 0
+    end
+    
     def presenter
       @presenter ||= PostSetPresenter.new(self)
     end
     
-    def offset
-      ((page < 1) ? 0 : (page - 1)) * count
-    end
-
     def limit
       Danbooru.config.posts_per_page
     end

app/logical/post_sets/favorite.rb

@@ -1,18 +1,29 @@
 module PostSets
-  class Favorite < Base
-    attr_accessor :user
-
-    def initialize(user)
-      @user = user
-      super()
+  module Favorite
+    def user
+      @user ||= User.find(params[:id])
     end
     
     def tags
-      "fav:#{user.name}"
+      @tags ||= ["fav:#{user.name}"]
+    end
+    
+    def has_wiki?
+      false
+    end
+    
+    def reload
+      super
+      @user = nil
+      @count = nil
+    end
+    
+    def count
+      @count ||= Favorite.count(user.id)
     end
 
-    def load_posts
-      @posts = user.favorite_posts(:before_id => before_id)
+    def posts
+      @posts ||= user.favorites(pagination_options)
     end
   end  
 end

app/logical/post_sets/numbered.rb

@@ -0,0 +1,35 @@
+module PostSets
+  module Numbered
+    attr_reader :page
+    
+    def initialize(params)
+      super
+      @page = options[:page] ? options[:page].to_i : 1
+    end
+
+    def total_pages
+      @total_pages ||= (count / limit.to_f).ceil.to_i
+    end
+    
+    def reload
+      super
+      @total_pages = nil
+    end
+    
+    def slice(relation)
+      relation.offset(offset).all
+    end
+    
+    def pagination_options
+      {:offset => offset}
+    end
+    
+    def is_first_page?
+      offset == 0
+    end
+    
+    def offset
+      ((page < 1) ? 0 : (page - 1)) * limit
+    end
+  end
+end

app/logical/post_sets/pool.rb

@@ -1,33 +1,30 @@
+# This only works with the numbered paginator because of the way
+# the association is stored.
 module PostSets
-  class Pool < Base
-    attr_reader :pool
-    
-    def initialize(pool, options = {})
-      @pool = pool
-      @count = pool.post_id_array.size
-      super(options)
+  module Pool
+    def pool
+      @pool ||= Pool.find(params[:id])
     end
     
     def tags
-      "pool:#{pool.name}"
+      ["pool:#{pool.name}"]
+    end
+    
+    def has_wiki?
+      true
+    end
+    
+    def count
+      pool.post_count
     end
 
-    def load_posts
-      @posts = pool.posts(:limit => limit, :offset => offset).order("posts.id")
+    def posts
+      @posts ||= pool.posts(pagination_options)
     end
     
-    def sorted_posts
-      sort_posts(@posts)
-    end
-    
-  private
-    def sort_posts(posts)
-      posts_by_id = posts.inject({}) do |hash, post|
-        hash[post.id] = post
-        hash
-      end
-      
-      @pool.post_id_array.map {|x| posts_by_id[x]}
+    def reload
+      super
+      @pool = nil
     end
   end  
 end

app/logical/post_sets/post.rb

@@ -1,78 +1,56 @@
 module PostSets
-  class Post < Base
+  module Post
     class Error < Exception ; end
   
-    attr_accessor :tags, :errors, :count
-    attr_accessor :wiki_page, :artist, :suggestions
-  
-    def initialize(tags, options = {})
-      super(options)
-      @tags = Tag.normalize(tags)
-      @errors = []
-      load_associations
-      load_suggestions
-      validate
+    attr_accessor :tags, :count, :wiki_page, :artist, :suggestions
+    
+    def tags
+      @tags ||= Tag.normalize(params[:tags])
+    end
+    
+    def count
+      @count ||= ::Post.fast_count(tag_string)
+    end
+    
+    def posts
+      @posts ||= slice(::Post.tag_match(tags).limit(limit))
+    end
+
+    def reload
+      super
+      @tags = nil
+      @tag_string = nil
+      @count = nil
+      @wiki_page = nil
+      @artist = nil
+    end
+    
+    def wiki_page
+      @wiki_page ||= ::WikiPage.titled(tag_string).first
+    end
+    
+    def artist
+      @artist ||= ::Artist.find_by_name(tag_string)
     end
     
     def has_wiki?
       is_single_tag?
     end
     
-    def has_errors?
-      errors.any?
-    end
-  
-    def offset
-      x = (page - 1) * limit
-      if x < 0
-        x = 0
-      end
-      x
-    end
-  
     def is_single_tag?
       tag_array.size == 1
     end
-  
-    def date_tag
-      tag_array.grep(/date:/).first
-    end
-  
-    def load_associations
-      if is_single_tag?
-        @wiki_page = ::WikiPage.titled(tags).first
-        @artist = ::Artist.find_by_name(tags)
-      end
-    end
-  
-    def load_posts
-      @count = ::Post.fast_count(tags)
-      @posts = ::Post.tag_match(tags).before_id(before_id).all(:order => "posts.id desc", :limit => limit, :offset => offset)
-    end
-  
-    def load_suggestions
-      if count < limit && is_single_tag?
-        @suggestions = Tag.find_suggestions(tags)
-      else
-        @suggestions = []
-      end
-    end
-  
+    
     def tag_array
       @tag_array ||= Tag.scan_query(tags)
     end
     
-    def tag
-      tag_array.first
-    end
-  
     def validate
+      super
       validate_page
       validate_query_count
-    rescue Error => x
-      @errors << x.to_s
     end
-  
+    
     def validate_page
       if page > 1_000
         raise Error.new("You cannot explicitly specify the page after page 1000")

app/logical/post_sets/sequential.rb

@@ -0,0 +1,29 @@
+module PostSets
+  module Sequential
+    attr_reader :before_id, :after_id
+    
+    def initialize(params)
+      super
+      @before_id = params[:before_id]
+      @after_id = params[:after_id]
+    end
+    
+    def slice(relation)
+      if before_id
+        relation.where("id < ?", before_id).all
+      elsif after_id
+        relation.where("id > ?", after_id).order("id asc").all.reverse
+      else
+        relation.all
+      end
+    end
+    
+    def pagination_options
+      {:before_id => before_id, :after_id => after_id}
+    end
+    
+    def is_first_page?
+      before_id.nil?
+    end
+  end
+end

app/logical/post_sets/wiki_page.rb

@@ -1,34 +1,29 @@
 module PostSets
-  class WikiPage < Base
-    attr_reader :tag_name
-    
-    def initialize(tag_name)
-      @tag_name = tag_name
-      super()
+  module WikiPage
+    def wiki_page
+      @wiki_page ||= begin
+        if params[:id]
+          ::WikiPage.find(params[:id])
+        elsif params[:tags]
+          ::WikiPage.titled(params[:tags]).first
+        end
+      end
     end
     
-    def load_posts
-      @posts = ::Post.tag_match(tag_name).all(:order => "posts.id desc", :limit => limit, :offset => offset)
-    end
-    
-    def limit
-      8
-    end
-    
-    def offset
-      0
+    def has_wiki?
+      true
     end
     
     def tags
-      [@tag_name]
+      @tags ||= Tag.normalize(wiki_page.title)
     end
-
-    def use_sequential_paginator?
-      false
+    
+    def posts
+      @posts ||= slice(::Post.tag_match(tag_string))
     end
-  
-    def use_numbered_paginator?
-      false
+    
+    def count
+      @count ||= ::Post.fast_count(tag_string)
     end
   end  
 end

app/models/pool.rb

@@ -72,9 +72,9 @@ class Pool < ActiveRecord::Base
   
   def posts(options = {})
     offset = options[:offset] || 0
-    limit = options[:limit] || 20
+    limit = options[:limit] || Danbooru.config.posts_per_page
     ids = post_id_array[offset, limit]
-    Post.where(["id IN (?)", ids])
+    Post.where(["id IN (?)", ids]).order(Favorite.sql_order_clause(ids))
   end
   
   def post_id_array

app/models/post.rb

@@ -1,6 +1,7 @@
 class Post < ActiveRecord::Base
   class ApprovalError < Exception ; end
   class DisapprovalError < Exception ; end
+  class SearchError < Exception ; end
   
   attr_accessor :old_tag_string, :old_parent_id
   after_destroy :delete_files
@@ -39,6 +40,7 @@ class Post < ActiveRecord::Base
   scope :available_for_moderation, lambda {where(["id NOT IN (SELECT pd.post_id FROM post_disapprovals pd WHERE pd.user_id = ?)", CurrentUser.id])}
   scope :hidden_from_moderation, lambda {where(["id IN (SELECT pd.post_id FROM post_disapprovals pd WHERE pd.user_id = ?)", CurrentUser.id])}
   scope :before_id, lambda {|id| id.present? ? where(["posts.id < ?", id]) : where("TRUE")}
+  scope :after_id, lambda {|id| id.present? ? where("posts.id > ?", id) : where("true")}
   scope :tag_match, lambda {|query| Post.tag_match_helper(query)}
   search_methods :tag_match
   
@@ -374,36 +376,33 @@ class Post < ActiveRecord::Base
       Favorite.destroy_for_post(self)
     end
     
-    def add_favorite(user)
-      if user.is_a?(ActiveRecord::Base)
-        user_id = user.id
-      else
-        user_id = user
+    def favorited_by?(user_id)
+      fav_string =~ /(?:\A| )fav:#{user_id}(?:\Z| )/
+    end
+    
+    def add_favorite(user_id)
+      if user_id.is_a?(ActiveRecord::Base)
+        user_id = user_id.id
+      end
+      
+      if favorited_by?(user_id)
+        return false
       end
       
-      return false if fav_string =~ /(?:\A| )fav:#{user_id}(?:\Z| )/
       self.fav_string += " fav:#{user_id}"
       self.fav_string.strip!
-      
-      # in order to avoid rerunning the callbacks, just update through raw sql
-      execute_sql("UPDATE posts SET fav_string = ? WHERE id = ?", fav_string, id)
-      
+      update_attribute(:fav_string, fav_string)
       Favorite.create(:user_id => user_id, :post_id => id)
     end
     
-    def remove_favorite(user)
-      if user.is_a?(ActiveRecord::Base)
-        user_id = user.id
-      else
-        user_id = user
+    def remove_favorite(user_id)
+      if user_id.is_a?(ActiveRecord::Base)
+        user_id = user_id.id
       end
       
       self.fav_string.gsub!(/(?:\A| )fav:#{user_id}(?:\Z| )/, " ")
       self.fav_string.strip!
-      
-      # in order to avoid rerunning the callbacks, just update through raw sql
-      execute_sql("UPDATE posts SET fav_string = ? WHERE id = ?", fav_string, id)
-
+      update_attribute(:fav_string, fav_string)
       Favorite.destroy(:user_id => user_id, :post_id => id)
     end
     
@@ -413,9 +412,9 @@ class Post < ActiveRecord::Base
   end
   
   module SearchMethods
-    class SearchError < Exception ; end
-    
     def add_range_relation(arr, field, relation)
+      return relation if arr.nil?
+      
       case arr[0]
       when :eq
         relation.where(["#{field} = ?", arr[1]])
@@ -513,10 +512,10 @@ class Post < ActiveRecord::Base
       relation = add_range_relation(q[:character_tag_count], "posts.tag_count_character", relation)
       relation = add_range_relation(q[:tag_count], "posts.tag_count", relation)      
 
-      if q[:md5].any?
+      if q[:md5]
         relation = relation.where(["posts.md5 IN (?)", q[:md5]])
       end
-
+      
       if q[:status] == "pending"
         relation = relation.where("posts.is_pending = TRUE")
       elsif q[:status] == "flagged"
@@ -525,11 +524,11 @@ class Post < ActiveRecord::Base
         relation = relation.where("posts.is_deleted = TRUE")
       end
 
-      if q[:source].is_a?(String)
+      if q[:source]
         relation = relation.where(["posts.source LIKE ? ESCAPE E'\\\\'", q[:source]])
       end
 
-      if q[:subscriptions].any?
+      if q[:subscriptions]
         relation = add_tag_subscription_relation(q[:subscriptions], relation)
       end
 

app/models/tag.rb

@@ -208,7 +208,7 @@ class Tag < ActiveRecord::Base
     end
 
     def parse_query(query, options = {})
-      q = Hash.new {|h, k| h[k] = []}
+      q = {}
       q[:tags] = {
         :related => [],
         :include => [],
@@ -237,6 +237,7 @@ class Tag < ActiveRecord::Base
             q[:tags][:related] << "fav:#{User.name_to_id($2)}"
 
           when "sub"
+            q[:subscriptions] ||= []
             q[:subscriptions] << $2
 
           when "md5"

app/models/user.rb

@@ -117,16 +117,13 @@ class User < ActiveRecord::Base
   end
   
   module FavoriteMethods
-    def favorite_posts(options = {})
-      favorites_table = Favorite.table_name_for(id)
-      if options[:before_id]
-        before_id_sql_fragment = ["favorites.id < ?", options[:before_id]]
+    def favorites(options = {})
+      post_ids = Favorite.find_post_ids(id, options)
+      if post_ids.any?
+        Post.where("id in (?)", post_ids).order(Favorite.sql_order_clause(post_ids))
       else
-        before_id_sql_fragment = "TRUE"
+        Post.where("false")
       end
-      limit = options[:limit] || 20
-
-      Post.joins("JOIN #{favorites_table} AS favorites ON favorites.post_id = posts.id").where("favorites.user_id = ?", id).where(before_id_sql_fragment).order("favorite_id DESC").limit(limit).select("posts.*, favorites.id AS favorite_id")
     end
   end
   

app/presenters/paginators/numbered.rb

@@ -0,0 +1,58 @@
+module Paginators
+  class Numbered
+    attr_reader :template, :source
+    delegate :url, :total_pages, :current_page, :to => :source
+    
+    def initialize(template, source)
+      @template = template
+      @source = source
+    end
+    
+    def pagination_html
+      html = "<menu>"
+      window = 3
+      if total_pages <= (window * 2) + 5
+        1.upto(total_pages) do |page|
+          html << pagination_item(page, current_page)
+        end
+      elsif current_page <= window + 2
+        1.upto(current_page + window) do |page|
+          html << pagination_item(page, current_page)
+        end
+        html << pagination_item("...", current_page)
+        html << pagination_item(total_pages, current_page)
+      
+      elsif current_page >= total_pages - (window + 1)
+        html << pagination_item(1, current_page)
+        html << pagination_item("...", current_page)
+        (current_page - window).upto(total_pages) do |page|
+          html << pagination_item(page, current_page)
+        end
+      else
+        html << pagination_item(1, current_page)
+        html << pagination_item("...", current_page)
+        (current_page - window).upto(current_page + window) do |page|
+          html << pagination_item(page, current_page)
+        end
+        html << pagination_item("...", current_page)
+        html << pagination_item(total_pages, current_page)
+      end
+      html << "</menu>"
+      html.html_safe
+    end
+
+  protected
+    def pagination_item(page, current_page)
+      html = "<li>"
+      if page == "..."
+        html << "..."
+      elsif page == current_page
+        html << page.to_s
+      else
+        html << template.link_to(page, url(template, :page => page))
+      end
+      html << "</li>"
+      html.html_safe
+    end
+  end
+end

app/presenters/paginators/post.rb

@@ -15,6 +15,7 @@ module Paginators
         [1, post_set.page].max
       end
       
+      # TODO: this is not compatible with paginating favorites
       def sequential_link(template)
         template.posts_path(:tags => template.params[:tags], before_id => post_set.posts[-1].id, :page => nil)
       end

app/presenters/paginators/sequential.rb

@@ -0,0 +1,29 @@
+module Paginators
+  class Sequential
+    attr_reader :template, :source
+    delegate :url, :to => :source
+    
+    def initialize(template, source)
+      @template = template
+      @source = source
+    end
+    
+    def pagination_html
+      html = "<menu>"
+      html << '<li>' + template.link_to("&laquo; Previous", prev_url) + '</li>'
+      if next_url
+        html << '<li>' + template.link_to("Next &raquo;", next_url) + '</li>'
+      end
+      html << "</menu>"
+      html.html_safe
+    end
+    
+    def prev_url
+      template.request.env["HTTP_REFERER"] 
+    end
+    
+    def next_url
+      @next_url ||= url(template)
+    end
+  end
+end

app/views/posts/index.html.erb

@@ -1,11 +1,5 @@
 <div id="c-posts">
   <div id="a-index">
-    <% if @post_set.suggestions.any? %>
-      <div class="notice">
-        Maybe you meant: <%= @post_set.suggestions.map {|x| link_to(x, posts_path(:tags => x), :class => "tag-type-#{Tag.type_name(x)}" )}.to_sentence(:last_word_connector => ", or ", :two_words_connector => " or ") %>
-      </div>
-    <% end %>
-
     <aside id="sidebar">
       <section id="search-box">
         <h1>Search</h1>

app/views/posts/partials/index/_posts.html.erb

@@ -5,5 +5,7 @@
 <div class="clearfix"></div>
 
 <div class="paginator">
-  <%= post_set.presenter.pagination_html(self) %>
+  <%= smart_paginator(post_set) do |page| %>
+    <%= link_to(page, posts_path(:page => page, :tags => params[:tags])) %>
+  <% end %>
 </div>

app/views/uploads/new.html.erb

@@ -1,5 +1,7 @@
 <div id="c-uploads">
   <div id="a-new">
+    <h1>Upload Post</h1>
+    
     <div id="upload-guide-notice">
       <p>Before uploading, please read the <%= link_to "how to upload guide", wiki_pages_path(:title => "howto:upload") %>.</p>
     </div>

db/migrate/20100211025616_create_pools.rb

@@ -6,6 +6,7 @@ class CreatePools < ActiveRecord::Migration
       t.column :description, :text
       t.column :is_active, :boolean, :null => false, :default => true
       t.column :post_ids, :text, :null => false, :default => ""
+      t.column :post_count, :integer, :null => false, :default => 0
       t.timestamps
     end