clip.rb in clipster-0.3.0

- old
+ new
@@ -1,23 +1,74 @@
-module Clipster
-  class Clip < ActiveRecord::Base
-    before_create :init_id
-    self.primary_key = :url_hash
-    attr_accessible :clip, :language, :title, :private
-
-    # scope utilized by search functionality.
-    # TODO: build more powerful search term creation
-    scope :search, lambda {|term| 
-      where("title LIKE :term or language LIKE :term or clip LIKE :term",{
-          :term => term
-      })
-    }
-    
-    validates :clip, :length => {:minimum   => 3}
-    validates :title, :length => {:minimum   => 1}
-    
-    private
-      def init_id
-        self.url_hash = Time.now.to_f.to_s.gsub('.','').to_i.to_s(36)
-      end
-  end
-end
+module Clipster
+  class Clip < ActiveRecord::Base
+    include ActionView::Helpers::DateHelper
+    before_create :init_id
+    self.primary_key = :url_hash
+    attr_accessible :clip, :language, :title, :private, :expires, :lifespan
+    cattr_reader :lifespans
+    
+    # Define all supported lifespans and their time offset 
+    @@lifespans = {"Forever" => nil,
+                   "An Hour" => {:hours=>1},
+                   "A Week"  => {:days=>7},
+                   "A Day"   => {:days=>1},
+                   "A Month" => {:months=>1},
+                   "A Year"  => {:years=>1}}
+    
+    # TODO: build more powerful search term creation
+    scope :search, lambda {|term| 
+      where("(title LIKE :term or language LIKE :term or clip LIKE :term) and (expires is null OR expires > :now)",{
+          :term => term,
+          :now => DateTime.now
+      })
+    }
+    
+    # All clips that are public, language specific, and not expired
+    scope :language_for_public, lambda {|lang| 
+      where("private = :private AND
+             language = :lang AND
+             (expires is null OR expires > :now)",{
+          :private => false,
+          :lang => lang,
+          :now  => DateTime.now
+      })
+    }
+    
+    # All clips that are public, and not expired
+    scope :public, lambda {
+      where("private = :private AND
+             (expires is null OR expires > :now)",{
+          :private => false,
+          :now  => DateTime.now
+      })
+    }
+    
+    validates :clip, :length => {:minimum   => 3}
+    validates :title, :length => {:minimum   => 1}
+    
+    # Setter to convert user's choice of 'A Week', etc. to an actual DateTime
+    def lifespan=(lifespan)
+      unless @@lifespans[lifespan].nil?
+        self.expires = DateTime.now.advance(@@lifespans[lifespan])
+      end
+    end
+    
+    # Getter to convert an expire date to '1 Month', '1 Year', etc.
+    def lifespan
+      unless self.expires.nil?
+        time_ago_in_words(self.expires)
+      else
+        "the end of time"
+      end
+    end
+    
+    # Utility method called by either cron job or when an expired clip is accessed
+    def Clip.delete_expired_clips
+      Clip.destroy_all(["expires is not null AND expires <= ?", DateTime.now])
+    end
+    
+    private
+      def init_id
+        self.url_hash = Time.now.to_f.to_s.gsub('.','').to_i.to_s(36)
+      end
+  end
+end