|
|
#coding=utf-8
|
|
|
class WatchesService
|
|
|
def watch params
|
|
|
@current_user = User.find(params[:current_user_id])
|
|
|
if params[:object_type] == 'user' && params[:current_user_id] == params[:object_id]
|
|
|
raise '不能关注自己！'
|
|
|
end
|
|
|
@watchables = find_watchables params
|
|
|
|
|
|
if @watchables.nil?
|
|
|
raise '404'
|
|
|
end
|
|
|
set_watcher(@watchables, @current_user, true)
|
|
|
end
|
|
|
|
|
|
def unwatch params
|
|
|
@current_user = User.find(params[:current_user_id])
|
|
|
@watchables = find_watchables params
|
|
|
if @watchables.nil?
|
|
|
raise '404'
|
|
|
end
|
|
|
set_watcher(@watchables, @current_user, 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
|
|
|
watchables
|
|
|
end
|
|
|
end |
