Class: Activity

Inherits:
ActiveRecord::Base
  • Object
show all
Includes:
NotificationsHelper
Defined in:
app/models/activity.rb

Overview

Activities follow the Activity Streams standard.

Every Activity has an #author, #user_author and #owner

author

Is the subject that originated the activity. The entity that posted something, liked, etc..

user_author

The User logged in when the Activity was created. If the User has not changed the session to represent other entity (a Group for example), the user_author will be the same as the author.

owner

The subject whose wall was posted or comment was liked, etc..

Audiences and visibility

Each activity is attached to one or more relations, which define the subject that can reach the activity

In the case of a public relation everyone will be able to see the activity.

In the case of custom relations, only the subjects that have a Tie with that relation (in other words, the contacts that have been added as friends with that relation} will be able to reach the Activity

Instance Method Summary collapse

Methods included from NotificationsHelper

#description_of, #locale_as, #notification_url_of, #title_of

Instance Method Details

#audience ⇒ Object

The Actors this activity is shared with



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# File 'app/models/activity.rb', line 278

def audience
  raise "Cannot get the audience of a public activity!" if public?

  [ author, user_author, owner ].uniq |
    Actor.
      joins(:received_ties).
      merge(Tie.where(:relation_id => relation_ids))
end

#audience_in_words(subject, options = {}) ⇒ Object

The Relation with which activity is shared



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# File 'app/models/activity.rb', line 288

def audience_in_words(subject, options = {})
  options[:details] ||= :full

  public_relation = relations.select{ |r| r.is_a?(Relation::Public) }

  visibility, audience =
    if public_relation.present?
      [ :public, nil ]
    else
      visible_relations =
        relations.select{ |r| r.actor_id == Actor.normalize_id(subject)}

      if visible_relations.present?
        [ :visible, visible_relations.map(&:name).uniq.join(", ") ]
      else
        [ :hidden, relations.map(&:actor).map(&:name).uniq.join(", ") ]
      end
    end

  I18n.t "activity.audience.#{ visibility }.#{ options[:details] }", :audience => audience
end

#author_subject ⇒ Object

The subject author



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# File 'app/models/activity.rb', line 93

def author_subject
  author.subject
end

#comments ⇒ Object

The comments about this activity



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# File 'app/models/activity.rb', line 150

def comments
  children.includes(:activity_objects).where('activity_objects.object_type' => "Comment")
end

#direct_activity_object ⇒ Object

The first activity object of this activity



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# File 'app/models/activity.rb', line 184

def direct_activity_object
  @direct_activity_object ||=
    activity_objects.first
end

#direct_object ⇒ Object

The first object of this activity



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# File 'app/models/activity.rb', line 190

def direct_object
  @direct_object ||=
    direct_activity_object.try(:object)
end

#liked_by(user) ⇒ Object

:nodoc:



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# File 'app/models/activity.rb', line 159

def liked_by(user) #:nodoc:
  likes.authored_by(user)
end

#liked_by?(user) ⇒ Boolean

Does user like this activity?

Returns:

  • (Boolean) 


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# File 'app/models/activity.rb', line 164

def liked_by?(user)
  liked_by(user).present?
end

#likes ⇒ Object

The ‘like’ qualifications emmited to this activities



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# File 'app/models/activity.rb', line 155

def likes
  children.joins(:activity_verb).where('activity_verbs.name' => "like")
end

#new_like(subject, user) ⇒ Object

Build a new children activity where subject like this



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# File 'app/models/activity.rb', line 169

def new_like(subject, user)
  a = children.new :verb           => "like",
                   :author_id      => Actor.normalize_id(subject),
                   :user_author_id => Actor.normalize_id(user),
                   :owner_id       => owner_id,
                   :relation_ids   => self.relation_ids

  if direct_activity_object.present?
    a.activity_objects << direct_activity_object
  end

  a
end

#notificable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/activity.rb', line 239

def notificable?
  is_root? or ['post','update'].include?(root.verb)
end

#notify ⇒ Object 



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# File 'app/models/activity.rb', line 243

def notify
  return true unless notificable?
  #Avaible verbs: follow, like, make-friend, post, update, join

  if direct_object.is_a? Comment
    participants.each do |p|
      p.notify(notification_subject, "Youre not supposed to see this", self) unless p == sender
    end
  elsif ['like','follow','make-friend','post','update', 'join'].include? verb and !reflexive?
    receiver.notify(notification_subject, "Youre not supposed to see this", self)
  end
  true
end

#owner_subject ⇒ Object

The subject owner



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# File 'app/models/activity.rb', line 98

def owner_subject
  owner.subject
end

#participants ⇒ Object

A list of participants



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# File 'app/models/activity.rb', line 258

def participants
  parts=Set.new
  same_thread.map{|a| a.activity_objects.first}.each do |ao|
    parts << ao.author if ao.respond_to? :author and !ao.author.nil?
  end
  parts
end

#public? ⇒ Boolean

Is this activity public?

Returns:

  • (Boolean) 


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# File 'app/models/activity.rb', line 273

def public?
  relation_ids.include? Relation::Public.instance.id
end

#receiver ⇒ Object

The wall where the activity is shown belongs to receiver

This method provides the Actor. Use #receiver_subject for the Subject (User, Group, etc..)



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# File 'app/models/activity.rb', line 137

def receiver
  owner
end

#receiver_subject ⇒ Object

The wall where the activity is shown belongs to the receiver

This method provides the Subject (User, Group, etc…). Use #receiver for the Actor.



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# File 'app/models/activity.rb', line 145

def receiver_subject
  owner_subject
end

#reflexive? ⇒ Boolean

Does this Activity have the same sender and receiver?

Returns:

  • (Boolean) 


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# File 'app/models/activity.rb', line 108

def reflexive?
  author_id == owner_id
end

#represented_author? ⇒ Boolean

Is the author represented in this Activity?

Returns:

  • (Boolean) 


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# File 'app/models/activity.rb', line 113

def represented_author?
  author_id != user_author_id
end

#same_thread ⇒ Object

This and related activities



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# File 'app/models/activity.rb', line 267

def same_thread
  return [self] if is_root?
  [parent] + siblings
end

#sender ⇒ Object

The Actor author of this activity

This method provides the Actor. Use #sender_subject for the Subject (User, Group, etc..)



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# File 'app/models/activity.rb', line 121

def sender
  author
end

#sender_subject ⇒ Object

The Subject author of this activity

This method provides the Subject (User, Group, etc…). Use #sender for the Actor.



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# File 'app/models/activity.rb', line 129

def sender_subject
  author_subject
end

#stream_content ⇒ Object

TODO: detailed description of activity



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# File 'app/models/activity.rb', line 235

def stream_content
  stream_title
end

#stream_title ⇒ Object

Title for activity streams



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# File 'app/models/activity.rb', line 221

def stream_title
  # FIXMEEEEEEEEEEEEEEEEE
  object = ( direct_object.present? ? 
             ( direct_object.is_a?(SocialStream::Models::Subject) ? 
               direct_object.name :
               direct_object.title ) :
             receiver.name )

  I18n.t "activity.stream.title.#{ verb }",
         :author => sender_subject.name,
         :activity_object => object
end

#title(view) ⇒ Object

The title for this activity in the stream



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# File 'app/models/activity.rb', line 196

def title view
  case verb
  when "follow", "make-friend", "like"
    I18n.t "activity.verb.#{ verb }.#{ receiver.subject_type }.title",
    :subject => view.link_name(sender_subject),
    :contact => view.link_name(receiver_subject)
  when "post", "update"
    if sender == receiver
      view.link_name sender_subject
    else
      I18n.t "activity.verb.post.title.other_wall",
             :sender => view.link_name(sender_subject),
             :receiver => view.link_name(receiver_subject)
    end
  when 'join'
    I18n.t('notification.join.one', 
          :sender => view.link_name(sender_subject),
          :thing => I18n.t(direct_object.class.to_s.underscore+'.one'),
          :title => title_of(direct_object))
  else
    "Must define activity title"
  end.html_safe
end

#user_author_subject ⇒ Object

The subject user actor



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# File 'app/models/activity.rb', line 103

def user_author_subject
  user_author.subject
end

#verb ⇒ Object

The name of the verb of this activity



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# File 'app/models/activity.rb', line 83

def verb
  activity_verb.name
end

#verb=(name) ⇒ Object

Set the name of the verb of this activity



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# File 'app/models/activity.rb', line 88

def verb=(name)
  self.activity_verb = ActivityVerb[name]
end