Class: Relation::Custom

Inherits:
Relation
  • Object
show all
Defined in:
app/models/relation/custom.rb

Overview

When a new subject is created, a initial set of relations is created for him. Afterwards, the subject can customize them and adapt them to his own preferences.

Default relations are defined at config/relations.yml

Constant Summary

Constants inherited from Relation

Negative, Positive

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Relation

allow, allow?, create_activity?, extra_list, #follow?, ids_shared_with, #mode, negative_names, normalize, normalize_id, #positive?, positive_names

Class Method Details

.defaults_for(actor) ⇒ Object 



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# File 'app/models/relation/custom.rb', line 25

def defaults_for(actor)
  subject_type = actor.subject.class.to_s.underscore
  cfg_rels = SocialStream.custom_relations[subject_type] ||
    SocialStream.custom_relations[subject_type.to_sym]

  if cfg_rels.nil?
    raise "Undefined relations for subject type #{ subject_type }. Please, add an entry to config/initializers/social_stream.rb"
  end

  rels = {}

  cfg_rels.each_pair do |name, cfg_rel|
    rels[name] =
      create! :actor =>         actor,
              :name  =>         cfg_rel['name'],
              :receiver_type => cfg_rel['receiver_type']

    if (ps = cfg_rel['permissions']).present?
      ps.each do |p| 
        p.push(nil) if p.size == 1

        rels[name].permissions << 
          Permission.find_or_create_by_action_and_object(*p)
      end 
    end
  end

  # Parent, relations must be set after creation
  # FIXME: Can fix with ruby 1.9 and ordered hashes
  cfg_rels.each_pair do |name, cfg_rel|
    rels[name].update_attribute(:parent, rels[cfg_rel['parent']])
  end

  rels.values
end

.strongest ⇒ Object

A relation in the top of a strength hierarchy



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# File 'app/models/relation/custom.rb', line 62

def strongest
  roots
end

Instance Method Details

#<=>(rel) ⇒ Object

Compare two relations



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# File 'app/models/relation/custom.rb', line 73

def <=> rel
  return -1 if rel.is_a?(Public)

  if ancestor_ids.include?(rel.id)
    1
  elsif rel.ancestor_ids.include?(id)
    -1
  else
    0
  end
end

#available_permissions ⇒ Object 



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# File 'app/models/relation/custom.rb', line 105

def available_permissions
  Permission.instances SocialStream.available_permissions[subject.class.to_s.underscore]
end

#stronger ⇒ Object

Other relations above in the same hierarchy that this relation



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# File 'app/models/relation/custom.rb', line 96

def stronger
  ancestors
end

#stronger_or_equal ⇒ Object

Relations above or at the same level of this relation



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# File 'app/models/relation/custom.rb', line 101

def stronger_or_equal
  path
end

#subject ⇒ Object

The subject who defined of this relation



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# File 'app/models/relation/custom.rb', line 68

def subject
  actor.subject
end

#weaker ⇒ Object

Other relations below in the same hierarchy that this relation



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# File 'app/models/relation/custom.rb', line 86

def weaker
  descendants
end

#weaker_or_equal ⇒ Object

Relations below or at the same level of this relation



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# File 'app/models/relation/custom.rb', line 91

def weaker_or_equal
  subtree
end