Class: CounterOne::Counter

Inherits:
Object
  • Object
show all
Defined in:
lib/counter_one/counter.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, relation, options) ⇒ Counter

Returns a new instance of Counter.



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# File 'lib/counter_one/counter.rb', line 6

def initialize(model, relation, options)
  @model = model
  @relation = [relation].flatten
  @options = options
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/counter_one/counter.rb', line 4

def model
  @model
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/counter_one/counter.rb', line 4

def options
  @options
end

#relation ⇒ Object (readonly)

Returns the value of attribute relation.



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# File 'lib/counter_one/counter.rb', line 4

def relation
  @relation
end

Instance Method Details

#recalculate_scope ⇒ Object 



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# File 'lib/counter_one/counter.rb', line 50

def recalculate_scope
  options[:recalculate_scope]
end

#relation_chain ⇒ Object 



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# File 'lib/counter_one/counter.rb', line 54

def relation_chain
  klass = model

  relation.each_with_object([]) { |rel, chain|
    chain << klass.reflect_on_association(rel).chain.map(&:name).reverse
    klass = rel.to_s.classify.constantize
  }.flatten
end

#update_counter(record, operator, changed_record = nil) ⇒ Object 



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# File 'lib/counter_one/counter.rb', line 12

def update_counter(record, operator, changed_record = nil)
  counter_record = record
  klass = model

  relation.each do |rel|
    unless klass.reflect_on_association(rel)
      raise "Can't find relation #{rel} for #{klass.to_s}"
    end

    counter_record = counter_record.send(rel)
    klass = counter_record.class

    return unless counter_record
  end

  if options[:only]
    unless options[:only].is_a?(Proc)
      raise ArgumentError.new(":only must be a Proc with conditions")
    end

    return unless options[:only].call(record)
  end

  if changed_record
    return if options[:only] ? condition_not_changed?(record, changed_record) : relation_id_not_changed?(record)
  end

  if counter_record
    column = options[:column] || "#{record.class.to_s.tableize}_count"

    if counter_record.is_a?(ActiveRecord::Associations::CollectionProxy)
      counter_record.each { |r| r.send(operator, column) }
    else
      counter_record.send(operator, column)
    end
  end
end