integrate tags plugins

Gemfile

@@ -21,6 +21,8 @@ gem "git"
 gem "acts_as_list"
 gem 'rdiscount'
 
+gem 'acts-as-taggable-on', '~>2.1.0'
+
 group :assets do
   gem 'sass-rails', "  ~> 3.1.0"
   gem 'coffee-rails', "~> 3.1.0"

Gemfile.lock

@@ -54,6 +54,8 @@ GEM
       activesupport (= 3.1.0)
     activesupport (3.1.0)
       multi_json (~> 1.0)
+    acts-as-taggable-on (2.1.1)
+      rails
     acts_as_list (0.1.4)
     addressable (2.2.6)
     ansi (1.3.0)
@@ -246,6 +248,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  acts-as-taggable-on (~> 2.1.0)
   acts_as_list
   annotate!
   autotest

app/models/project.rb

@@ -9,6 +9,8 @@ class Project < ActiveRecord::Base
   has_many :notes, :dependent => :destroy
   has_many :snippets, :dependent => :destroy
 
+  acts_as_taggable
+
   validates :name,
             :uniqueness => true,
             :presence => true,

db/migrate/20111101222453_acts_as_taggable_on_migration.rb

+class ActsAsTaggableOnMigration < ActiveRecord::Migration
+  def self.up
+    create_table :tags do |t|
+      t.string :name
+    end
+
+    create_table :taggings do |t|
+      t.references :tag
+
+      # You should make sure that the column created is
+      # long enough to store the required class names.
+      t.references :taggable, :polymorphic => true
+      t.references :tagger, :polymorphic => true
+
+      t.string :context
+
+      t.datetime :created_at
+    end
+
+    add_index :taggings, :tag_id
+    add_index :taggings, [:taggable_id, :taggable_type, :context]
+  end
+
+  def self.down
+    drop_table :taggings
+    drop_table :tags
+  end
+end

vendor/assets/javascripts/jquery.tagify.js

+/* Author: Alicia Liu */
+
+(function ($) {
+
+	$.widget("ui.tagify", {
+		options: {
+			delimiters: [13, 188],          // what user can type to complete a tag in char codes: [enter], [comma]
+			outputDelimiter: ',',           // delimiter for tags in original input field
+			cssClass: 'tagify-container',   // CSS class to style the tagify div and tags, see stylesheet
+			addTagPrompt: 'add tags'        // placeholder text
+		},
+
+		_create: function() {
+			var self = this,
+				el = self.element,
+				opts = self.options;
+
+			this.tags = [];
+
+			// hide text field and replace with a div that contains it's own input field for entering tags
+			this.tagInput = $("<input type='text'>")
+				.attr( 'placeholder', opts.addTagPrompt )
+				.keypress( function(e) {
+					var $this = $(this),
+					    pressed = e.which;
+
+					for ( i in opts.delimiters ) {
+
+						if (pressed == opts.delimiters[i]) {
+							self.add( $this.val() );
+							e.preventDefault(); 
+							return false;
+						}
+					}
+				})
+				// for some reason, in Safari, backspace is only recognized on keyup
+				.keyup( function(e) {
+					var $this = $(this),
+					    pressed = e.which;
+
+					// if backspace is hit with no input, remove the last tag
+					if (pressed == 8) { // backspace
+						if ( $this.val() == "" ) {
+							self.remove();
+							return false;
+						}
+						return;
+					}
+				});
+
+			this.tagDiv = $("<div></div>")
+			    .addClass( opts.cssClass )
+			    .click( function() {
+			        $(this).children('input').focus();
+			    })
+			    .append( this.tagInput )
+				.insertAfter( el.hide() );
+
+			// if the field isn't empty, parse the field for tags, and prepopulate existing tags
+			var initVal = $.trim( el.val() );
+
+			if ( initVal ) {
+				var initTags = initVal.split( opts.outputDelimiter );
+				$.each( initTags, function(i, tag) {
+				    self.add( tag );
+				});
+			}
+		},
+
+		_setOption: function( key, value ) {
+			options.key = value;
+		},
+
+		// add a tag, public function		
+		add: function(text) {
+    		var self = this;
+			text = text || self.tagInput.val();
+			if (text) {
+				var tagIndex = self.tags.length;
+
+				var removeButton = $("<a href='#'>x</a>")
+					.click( function() {
+						self.remove( tagIndex );
+						return false;
+					});
+				var newTag = $("<span></span>")
+					.text( text )
+					.append( removeButton );
+
+				self.tagInput.before( newTag );
+				self.tags.push( text );
+				self.tagInput.val('');
+			}
+		},
+
+		// remove a tag by index, public function
+		// if index is blank, remove the last tag
+		remove: function( tagIndex ) {
+			var self = this;
+			if ( tagIndex == null  || tagIndex === (self.tags.length - 1) ) {
+				this.tagDiv.children("span").last().remove();
+				self.tags.pop();
+			}
+			if ( typeof(tagIndex) == 'number' ) {
+				// otherwise just hide this tag, and we don't mess up the index
+				this.tagDiv.children( "span:eq(" + tagIndex + ")" ).hide();
+				 // we rely on the serialize function to remove null values
+				delete( self.tags[tagIndex] );
+			}
+		},
+
+		// serialize the tags with the given delimiter, and write it back into the tagified field
+		serialize: function() {
+			var self = this;
+			var delim = self.options.outputDelimiter;
+			var tagsStr = self.tags.join( delim );
+
+			// our tags might have deleted entries, remove them here
+			var dupes = new RegExp(delim + delim + '+', 'g'); // regex: /,,+/g
+			var ends = new RegExp('^' + delim + '|' + delim + '$', 'g');  // regex: /^,|,$/g
+			var outputStr = tagsStr.replace( dupes, delim ).replace(ends, '');
+
+			self.element.val(outputStr);
+			return outputStr;
+		},
+
+		inputField: function() {
+		    return this.tagInput;
+		},
+
+		containerDiv: function() {
+		    return this.tagDiv;
+		},
+
+		// remove the div, and show original input
+		destroy: function() {
+		    $.Widget.prototype.destroy.apply(this);
+			this.tagDiv.remove();
+			this.element.show();
+		}
+	});
+
+})(jQuery);
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vendor/assets/stylesheets/jquery-ui/jquery.tagify.css

+/* Tagify styles 
+Author: Alicia Liu test
+*/
+
+.tagify-container {
+}
+
+.tagify-container > span {
+    display: inline-block;
+    padding: 8px 11px 8px 11px;
+    margin: 1px 5px 0px 0px;
+    border-radius: 4px;
+    border: 1px solid #d0e1ff;
+    background-color: #d0e1ff;
+    color: #0f326d;
+    font-weight: bold;
+    font-size: 14px;
+}
+
+.tagify-container > span > a {
+    padding-left: 5px !important;
+    color: #83a5e1;
+    text-decoration: none;
+    font-weight: bold;
+}
+
+.tagify-container > input {
+    border: 0 none;
+    width: 100px !important;
+}
+
+.tagify-container > input:focus {
+    outline: none;
+}
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