add tag filters

app/controllers/application_controller.rb

@@ -44,11 +44,17 @@ class ApplicationController < ActionController::Base
       conds.push tag.id
       stories = Story.find(:all, :conditions => conds,
         :include => [ :user, { :taggings => :tag } ], :limit => 30,
-        :order => (newest ? "created_at DESC" : "hotness"))
+        :order => (newest ? "stories.created_at DESC" : "hotness"))
     else
+      if user
+        conds[0] += " AND taggings.tag_id NOT IN (SELECT tag_id FROM " <<
+          "tag_filters WHERE user_id = ?)"
+        conds.push @user.id
+      end
+
       stories = Story.find(:all, :conditions => conds,
         :include => [ :user, { :taggings => :tag } ], :limit => 30,
-        :order => (newest ? "created_at DESC" : "hotness"))
+        :order => (newest ? "stories.created_at DESC" : "hotness"))
     end
 
     # TODO: figure out a better sorting algorithm for newest, including some

app/controllers/filters_controller.rb

@@ -0,0 +1,36 @@
+class FiltersController < ApplicationController
+  before_filter :require_logged_in_user
+
+  def index
+    @filtered_tags = @user.tag_filters
+    render :action => "index"
+  end
+
+  def update
+    new_filters = []
+
+    params.each do |k,v|
+      if (m = k.match(/^tag_(.+)$/)) && v.to_i == 1 && Tag.find_by_tag(m[1])
+        new_filters.push m[1]
+      end
+    end
+
+    @user.tag_filters(:include => :tag).each do |tf|
+      if new_filters.include?(tf.tag.tag)
+        new_filters.reject!{|t| t == tf.tag.tag }
+      else
+        tf.destroy
+      end
+    end
+
+    new_filters.each do |t|
+      TagFilter.new({
+        :user_id => @user.id,
+        :tag_id => Tag.find_by_tag(t).id,
+      }).save
+    end
+
+    flash.now[:success] = "Your filters have been updated."
+    index
+  end
+end

app/models/tag_filter.rb

@@ -0,0 +1,4 @@
+class TagFilter < ActiveRecord::Base
+  belongs_to :tag
+  belongs_to :user
+end

app/models/user.rb

@@ -8,6 +8,8 @@ class User < ActiveRecord::Base
   has_many :received_messages,
     :class_name => "Message",
     :foreign_key => "recipient_user_id"
+  has_many :tag_filters
+
   has_secure_password
 
   validates_format_of :username, :with => /\A[A-Za-z0-9][A-Za-z0-9_-]*\Z/

app/views/filters/index.html.erb

@@ -0,0 +1,32 @@
+<div class="box wide">
+  <div class="legend">
+		Filtered Tags
+	</div>
+
+  <p>
+  To hide stories tagged with certain tags, check them below.
+  </p>
+
+  <%= form_tag "/filters", :method => :post do %>
+    <table class="data zebra" cellspacing=0 width="75%">
+    <tr>
+      <th width="10%">Hide</th>
+      <th width="15%">Tag</th>
+      <th width="75%">Description</th>
+    </tr>
+    <% Tag.all(:order => :tag).each do |tag| %>
+      <tr>
+        <td><input type="checkbox" name="tag_<%= tag.tag %>" value=1
+          <%= @filtered_tags.map{|ft| ft.tag_id }.include?(tag.id) ?
+          "checked" : "" %>></td>
+        <td><a href="/t/<%= tag.tag %>" class="tag tag_<%= tag.tag %>"><%=
+          tag.tag %></a></td>
+        <td><%= tag.description %></td>
+      </tr>
+    <% end %>
+    </table>
+    <p>
+    <%= submit_tag "Save Filters" %>
+    </p>
+  <% end %>
+</div>

app/views/global/_header.html.erb

@@ -1,6 +1,8 @@
 <div id="header">
 	<div id="headerright" class="<%= @user ? "loggedin" : "" %>">
 		<% if @user %>
+      <a href="/filters">Filters</a>
+
 			<% if (count = @user.unread_message_count) > 0 %>
 				<a href="/messages"><%= count %> New Message<%= count == 1 ? "" : "s"
           %></a>

config/routes.rb

@@ -51,6 +51,9 @@ Lobsters::Application.routes.draw do
   get "/settings" => "settings#index"
   post "/settings" => "settings#update"
   
+  get "/filters" => "filters#index"
+  post "/filters" => "filters#update"
+  
   post "/invitations" => "invitations#create"
   get "/invitations/:invitation_code" => "signup#invited"
 end

db/migrate/20120704025956_user_filter.rb

@@ -0,0 +1,12 @@
+class UserFilter < ActiveRecord::Migration
+  def up
+    create_table :tag_filters do |t|
+      t.timestamps
+      t.integer :user_id
+      t.integer :tag_id
+    end
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120704013019) do
+ActiveRecord::Schema.define(:version => 20120704025956) do
 
   create_table "comments", :force => true do |t|
     t.datetime "created_at",                                                                      :null => false
@@ -79,6 +79,13 @@ ActiveRecord::Schema.define(:version => 20120704013019) do
   add_index "stories", ["hotness"], :name => "hotness_idx"
   add_index "stories", ["url"], :name => "url"
 
+  create_table "tag_filters", :force => true do |t|
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+    t.integer  "user_id"
+    t.integer  "tag_id"
+  end
+
   create_table "taggings", :force => true do |t|
     t.integer "story_id", :null => false
     t.integer "tag_id",   :null => false