关注列表与关注

app/controllers/watchers_controller.rb

@@ -162,4 +162,5 @@ class WatchersController < ApplicationController
       format.js { render :partial => 'set_watcher', :locals => {:user => user, :watched => watchables} }
    end
   end
+
 end

app/services/service.rb

@@ -0,0 +1,51 @@
+class Service
+  def watch params
+    @watchables = find_watchables params
+    if @watchables.nil?
+
+    end
+    set_watcher(@watchables, User.current, true)
+  end
+
+  def unwatch params
+    find_watchables params
+    set_watcher(@watchables, User.current, false)
+  end
+
+  def find_watchables params
+    #根据参数获取关注对象的类型（user、project）
+    klass = Object.const_get(params[:object_type].camelcase) rescue nil
+    #判断获取的对象类型能否响应‘watched_by’方法
+    if klass && klass.respond_to?('watched_by')
+      @watchables = klass.find_all_by_id(Array.wrap(params[:object_id]))
+      raise Unauthorized if @watchables.any? {|w| w.respond_to?(:visible?) && !w.visible?}
+    end
+    @watchables.present? ? @watchables : nil
+  end
+
+  def set_watcher(watchables, user, watching)
+    watchables.each do |watchable|
+      watchable.set_watcher(user, watching)
+      #  @user = watchable     # added by william
+      if watching
+        # 修改 user和project的状态
+        if watchable.instance_of?(User)
+          #写user_statuses表
+          UserStatus.find_by_user_id(watchable.id).update_watchers_count(1)
+        elsif watchable.instance_of?(Project)
+          #写project_statuese表
+          ProjectStatus.find_by_project_id(watchable.id).update_watchers_count(1)
+        end
+      else
+        # 修改 user和project的状态
+        if watchable.instance_of?(User)
+          #写user_statuses表
+          UserStatus.find_by_user_id(watchable.id).update_watchers_count(-1)
+        elsif watchable.instance_of?(Project)
+          #写project_statuese表 :project_status
+          ProjectStatus.find_by_project_id(watchable.id).update_watchers_count(-1)
+        end
+      end
+    end
+  end
+end

app/services/users_service.rb

@@ -107,4 +107,11 @@ class UsersService
       @se
     end
   end
+
+  #关注列表
+  def user_watcher params
+    @user = User.find(params[:id])
+    User.watched_by(@user.id)
+  end
+
 end