Module: Schedulable::ActsAsSchedulable::ClassMethods

Defined in:
lib/schedulable/acts_as_schedulable.rb

Instance Method Summary collapse

Instance Method Details

#acts_as_schedulable(options = {}) ⇒ Object 



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# File 'lib/schedulable/acts_as_schedulable.rb', line 12

def acts_as_schedulable(options = {})
  
  name = options[:name] || :schedule
  attribute = :date
  
  has_one name, as: :schedulable, dependent: :destroy
  accepts_nested_attributes_for name
  
  if options[:occurrences]
    
    # setup association
    if options[:occurrences].is_a?(String) || options[:occurrences].is_a?(Symbol)
      occurrences_association = options[:occurrences].to_sym
      options[:occurrences] = {}
    else
      occurrences_association = options[:occurrences][:name]
      options[:occurrences].delete(:name)
    end
    options[:occurrences][:class_name] = occurrences_association.to_s.classify
    options[:occurrences][:as]||= :schedulable
    options[:occurrences][:dependent]||:destroy
    options[:occurrences][:autosave]||= true
    
    has_many occurrences_association, options[:occurrences]
    
    # table_name
    occurrences_table_name = occurrences_association.to_s.tableize
    
    puts "SCHEDULABLE OCCURRENCES TABLE NAME: " + occurrences_table_name.to_s
    
    # remaining
    remaining_occurrences_options = options[:occurrences].clone
    remaining_occurrences_association = ("remaining_" << occurrences_association.to_s).to_sym
    has_many remaining_occurrences_association, -> { where "#{occurrences_table_name}.date >= ?", Time.now}, remaining_occurrences_options
    
    # previous
    previous_occurrences_options = options[:occurrences].clone
    previous_occurrences_association = ("previous_" << occurrences_association.to_s).to_sym
    has_many previous_occurrences_association, -> { where "#{occurrences_table_name}.date < ?", Time.now}, previous_occurrences_options
    
    ActsAsSchedulable.add_occurrences_association(self, occurrences_association)
    
    after_save "build_#{occurrences_association}"
 
    self.class.instance_eval do
      define_method("build_#{occurrences_association}") do 
        # build occurrences for all events
        # TODO: only invalid events
        schedulables = self.all
        puts "build occurrences for #{schedulables.length} #{self.name.tableize}" 
        schedulables.each do |schedulable| 
          schedulable.send("build_#{occurrences_association}")
        end
      end
    end
  
    define_method "build_#{occurrences_association}" do 
      
      # build occurrences for events
      
      schedule = self.send(name)
      
      now = Time.now
      occurrence_attribute = :date
      
      schedulable = schedule.schedulable
      terminating = schedule.until.present? || schedule.count.present? && schedule.count > 0

      max_build_period = Schedulable.config.max_build_period || 1.year
      max_date = now + max_build_period
      max_date = terminating ? [max_date, schedule.last.to_time].min : max_date
      
      max_build_count = Schedulable.config.max_build_count || 0
      max_build_count = terminating ? [max_build_count, schedule.remaining_occurrences.count].min : max_build_count

      # get occurrences
      if max_build_count > 0
        # get next occurrences for max_build_count
        occurrences = schedule.next_occurrences(max_build_count)
      end
      
      if !occurrences || occurrences.last && occurrences.last.to_time > max_date 
        # get next occurrences for max_date
        all_occurrences = schedule.occurrences(max_date)
        occurrences = []
        # filter future dates
        all_occurrences.each do |occurrence_date|
          if occurrence_date.to_time > now
            occurrences << occurrence_date
          end
        end
      end
      
      
      puts 'build occurrences'

      # build occurrences
      assocs = schedulable.class.reflect_on_all_associations(:has_many)
      assocs.each do |assoc|
        puts assoc.name
      end
      
      occurrences_records = schedulable.send(occurrences_association)
      
      # clean up unused remaining occurrences 
      record_count = 0
      occurrences_records.each do |occurrence_record|
        if occurrence_record.date > now
          # destroy occurrence if it's not used anymore
          if !schedule.occurs_on?(occurrence_record.date) || occurrence_record.date > max_date || record_count > max_build_count
            if occurrences_records.destroy(occurrence_record)
              puts 'an error occurred while destroying an unused occurrence record'
            end
          end
          record_count = record_count + 1
        end
      end
      
      # build occurrences
      occurrences.each do |occurrence|
        
        # filter existing occurrence records
        existing = occurrences_records.select { |record|
          record.date.to_date == occurrence.to_date
        }
        if existing.length > 0
          # a record for this date already exists, adjust time
          existing.each { |record|
            #record.date = occurrence.to_datetime
            if !occurrences_records.update(record, date: occurrence.to_datetime)
              puts 'an error occurred while saving an existing occurrence record'
            end
          }
        else
          # create new record
          if !occurrences_records.create(date: occurrence.to_datetime)
            puts 'an error occurred while creating an occurrence record'
          end
        end
      end
      
    end
    
  end
  
end