Module: RequiresApproval

Extended by:
ActiveSupport::Concern
Defined in:
lib/errors.rb,
lib/requires_approval.rb

Defined Under Namespace

Modules: ClassMethods Classes: CustomError, DenyingNeverApprovedError, InvalidFieldsError, PartialApprovalForNewObject

Instance Method Summary collapse

Instance Method Details

#approve_all_attributes ⇒ Object 



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# File 'lib/requires_approval.rb', line 13

def approve_all_attributes
  self.approve_attributes(self.fields_requiring_approval)
end

#approve_attributes(*attributes) ⇒ Object

# approve a list of attributes



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# File 'lib/requires_approval.rb', line 18

def approve_attributes(*attributes)

  return true unless self.has_pending_changes?

  # validate an normalize our attributes
  attributes = self.check_attributes_for_approval(attributes)

  # make sure that all attributes are provided if we have never
  # been approved
  fields_not_being_approved = (self.fields_requiring_approval - attributes)

  if fields_not_being_approved.present? && self.never_approved?
    raise PartialApprovalForNewObject.new(
      "You must approve #{self.fields_requiring_approval.join(", ")} " +
      "for a new #{self.class.name}"
    )
  end

  attributes.flatten.each do |attr|
    write_attribute(attr, self.latest_unapproved_version.send(attr))
  end

  if self.save
    # if we have approved all requested changes, make our latest
    # unapproved version approved -
    # this is ALWAYS true for a new record even though its pending_changes
    # hash is forced to have values
    if self.is_first_version? || self.no_pending_changes?
      self.latest_unapproved_version.update_attribute(:is_approved, true)
    else
      # makes our latest_unapproved_version approved and
      # creates another unapproved version with any remaining
      # attributes
      self.create_approval_version_record
    end

    self.update_attributes(:is_frozen => false)
    self.reload
    return true
  else
    return false
  end
end

#deny_attributes(*attributes) ⇒ Object 



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# File 'lib/requires_approval.rb', line 62

def deny_attributes(*attributes)

  unless self.has_approved_version?
    raise DenyingNeverApprovedError.new
  end

  attributes = self.check_attributes_for_approval(attributes)

  attributes.flatten.each do |attr|
    self.latest_unapproved_version.send("#{attr}=", self.send(attr))
    true
  end

  # if we have denied all changes, remove the record and
  # make sure it isn't frozen
  unless self.has_pending_changes?
    self.latest_unapproved_version.destroy
    self.update_attribute(:is_frozen, false)
  else
    self.latest_unapproved_version.save
  end

  self.reload
  true
end

#has_approved_version? ⇒ Boolean

have any of our versions ever been approved?

Returns:

  • (Boolean) 


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# File 'lib/requires_approval.rb', line 96

def has_approved_version?
  unless instance_variable_defined?(:@has_approved_version)
    @has_approved_version = (self.versions.where(:is_approved => true).count > 0)
  end

  @has_approved_version
end

#has_pending_changes? ⇒ Boolean

have we already approved all outstanding changes?

Returns:

  • (Boolean) 


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# File 'lib/requires_approval.rb', line 105

def has_pending_changes?
  self.pending_changes.present?
end

#is_first_version? ⇒ Boolean

are we the first version?

Returns:

  • (Boolean) 


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# File 'lib/requires_approval.rb', line 110

def is_first_version?
  !self.has_approved_version?
end

#no_pending_changes? ⇒ Boolean

returns true if there are no changes to approve

Returns:

  • (Boolean) 


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# File 'lib/requires_approval.rb', line 115

def no_pending_changes?
  !self.has_pending_changes?
end

#pending_changes ⇒ Object

the changes users have requested since the last approval



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# File 'lib/requires_approval.rb', line 120

def pending_changes
  return {} if self.latest_unapproved_version.blank?

  ret = {}
  # check each field requiring approval
  self.fields_requiring_approval.each do |field|

    # if it is the same in the unapproved as in the parent table
    # we skip it
    if self.is_first_version? ||
      self.send(field) != self.latest_unapproved_version.send(field)

      # otherwise we get the change set
      ret[field] = {
        # our first version is always nil, regardless of the
        # defaults in that table
        "was" => self.is_first_version? ? nil : self.send(field),
        "became" => self.latest_unapproved_version.send(field)
      }
    end
  end
  ret
end

#reload(*args) ⇒ Object 



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# File 'lib/requires_approval.rb', line 88

def reload(*args)
  if instance_variable_defined?(:@has_approved_version)
    remove_instance_variable(:@has_approved_version)
  end
  super(*args)
end