Module: Caracal::Core::Relationships

Included in:
Document
Defined in:
lib/caracal/core/relationships.rb

Overview

This module encapsulates all the functionality related to registering and retrieving relationships.

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/caracal/core/relationships.rb', line 12

def self.included(base)
  base.class_eval do
    
    #-------------------------------------------------------------
    # Configuration
    #-------------------------------------------------------------
    
    attr_reader :relationship_counter
    
    
    #-------------------------------------------------------------
    # Class Methods
    #-------------------------------------------------------------
    
    def self.default_relationships
      [
        { target: 'fontTable.xml',  type: :font      },
        { target: 'footer1.xml',    type: :footer    },
        { target: 'numbering.xml',  type: :numbering },
        { target: 'settings.xml',   type: :setting   },
        { target: 'styles.xml',     type: :style     }
      ]           
    end
    
    
    #-------------------------------------------------------------
    # Public Methods
    #-------------------------------------------------------------
    
    #============== ATTRIBUTES ==========================
    
    def relationship(options={}, &block)
      id = relationship_counter.to_i + 1
      options.merge!({ id: id })

      model = Caracal::Core::Models::RelationshipModel.new(options, &block)
      if model.valid?
        @relationship_counter = id
        rel = register_relationship(model)
      else
        raise Caracal::Errors::InvalidModelError, 'relationship must specify the :id, :target, and :type attributes.'
      end
      rel
    end
    
    
    #============== GETTERS =============================
    
    def relationships
      @relationships ||= []
    end
              
    def find_relationship(target)
      relationships.find { |r| r.matches?(target) }
    end
    
    
    #============== REGISTRATION ========================
    
    def register_relationship(model)
      unless r = find_relationship(model.relationship_target)
        relationships << model
        r = model
      end
      r
    end
    
    def unregister_relationship(target)
      if r = find_relationship(target)
        relationships.delete(r)
      end
    end
    
  end
end