# Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/

class OnlineNotification < ApplicationModel
  belongs_to :type_lookup,     class_name: 'TypeLookup'
  belongs_to :object_lookup,   class_name: 'ObjectLookup'

  after_create    :notify_clients_after_change
  after_update    :notify_clients_after_change
  after_destroy   :notify_clients_after_change

=begin

add a new online notification for this user

  OnlineNotification.add(
    :type          => 'Assigned to you',
    :object        => 'Ticket',
    :o_id          => ticket.id,
    :seen          => false,
    :created_by_id => 1,
    :user_id       => 2,
  )

=end

  def self.add(data)

    # lookups
    if data[:type]
      type_id = TypeLookup.by_name( data[:type] )
    end
    if data[:object]
      object_id = ObjectLookup.by_name( data[:object] )
    end

    record = {
      o_id: data[:o_id],
      object_lookup_id: object_id,
      type_lookup_id: type_id,
      seen: data[:seen],
      user_id: data[:user_id],
      created_by_id: data[:created_by_id]
    }

    OnlineNotification.create(record)
  end

=begin

mark online notification as seen

  OnlineNotification.seen(
    :id => 2,
  )

=end

  def self.seen(data)
      notification = OnlineNotification.find(data[:id])
      notification.seen = true
      notification.save
  end

=begin

remove whole online notifications of an object

  OnlineNotification.remove( 'Ticket', 123 )

=end

  def self.remove( object_name, o_id )
    object_id = ObjectLookup.by_name( object_name )
    OnlineNotification.where(
      object_lookup_id: object_id,
      o_id: o_id,
    ).destroy_all
  end

=begin

return all online notifications of an user

  notifications = OnlineNotification.list( user, limit )

=end

  def self.list(user,limit)

    notifications = OnlineNotification.where(user_id: user.id).
      order( 'created_at DESC, id DESC' ).
      limit( limit )
    list = []
    notifications.each do |item|
      data = item.attributes
      data['object']  = ObjectLookup.by_id( data['object_lookup_id'] )
      data['type']    = TypeLookup.by_id( data['type_lookup_id'] )
      data.delete('object_lookup_id')
      data.delete('type_lookup_id')
      list.push data
    end
    list
  end

=begin

return all online notifications of an object

  notifications = OnlineNotification.list_by_object( 'Ticket', 123 )

=end

  def self.list_by_object( object_name, o_id)
    object_id = ObjectLookup.by_name( object_name )
    notifications = OnlineNotification.where(
      object_lookup_id: object_id,
      o_id: o_id,
    ).
      order( 'created_at DESC, id DESC' ).
      limit( 10_000 )
    list = []
    notifications.each do |item|
      data = item.attributes
      data['object']  = ObjectLookup.by_id( data['object_lookup_id'] )
      data['type']    = TypeLookup.by_id( data['type_lookup_id'] )
      data.delete('object_lookup_id')
      data.delete('type_lookup_id')
      list.push data
    end
    list
  end

=begin

mark online notification as seen by object

  OnlineNotification.seen_by_object( 'Ticket', 123 )

=end

  def self.seen_by_object(object_name, o_id)
      object_id     = ObjectLookup.by_name( object_name )
      notifications = OnlineNotification.where(
        object_lookup_id: object_id,
        o_id: o_id,
        seen: false,
      )
      notifications.each do |notification|
        notification.seen = true
        notification.save
      end
      true
  end

=begin

return all online notifications of an user with assets

  OnlineNotification.list_full( user )

returns:

  list = {
    :stream => notifications,
    :assets => assets
  }

=end

  def self.list_full(user,limit)

    notifications = OnlineNotification.list(user, limit)
    assets = ApplicationModel.assets_of_object_list(notifications)
    return {
      stream: notifications,
      assets: assets
    }
  end

  def notify_clients_after_change
    Sessions.send_to(
      self.user_id,
      {
        event: 'OnlineNotification::changed',
        data: {}
      }
    )
  end

end