Module: ActiveRecordSurvey::Answer::Chained::InstanceMethods

Defined in:
lib/active_record_survey/node/answer/chained.rb

Instance Method Summary collapse

Instance Method Details

#build_answer(question_node) ⇒ Object

Chain nodes are different - they must find the final answer node added and add to it They must also see if the final answer node then points somewhere else - and fix the links on that



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# File 'lib/active_record_survey/node/answer/chained.rb', line 23

def build_answer(question_node)
	self.survey = question_node.survey

	question_node_maps = self.survey.node_maps.select { |i| i.node == question_node && !i.marked_for_destruction? }

	# No node_maps exist yet from this question
	if question_node_maps.length === 0
		# Build our first node-map
		question_node_maps << self.survey.node_maps.build(:node => question_node, :survey => self.survey)
	end

	last_answer_in_chain = (question_node.answers.last || question_node)

	# Each instance of this question needs the answer hung from it
	self.survey.node_maps.select { |i|
		i.node == last_answer_in_chain
	}.each { |node_map|
		curr_children = self.survey.node_maps.select { |j|
			node_map.children.include?(j)
		}

		new_node_map = self.survey.node_maps.build(:node => self, :survey => self.survey)

		node_map.children << new_node_map

		curr_children.each { |c|
			new_node_map.children << c
		}
	}

	true
end

#move_down ⇒ Object

Moves answer down relative to other answers by swapping parent and children



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# File 'lib/active_record_survey/node/answer/chained.rb', line 90

def move_down
	# Ensure each parent node to this node (the goal here is to hit a question node) is valid
	!self.survey.node_maps.select { |i|
		i.node == self
	}.collect { |node_map|
		# Must have children to move lower!
		# And the children are also answers!
		if node_map.children.length > 0 && !node_map.children.select { |j| j.node.class.ancestors.include?(::ActiveRecordSurvey::Node::Answer) }.empty?
			# I know this looks overly complicated, but we need to always work with the survey.node_maps - never children/parent of the relation
			parent_node = self.survey.node_maps.select { |j|
				node_map.parent == j
			}.first

			children = self.survey.node_maps.select { |j|
				node_map.children.include?(j)
			}

			children_children = self.survey.node_maps.select { |j|
				children.collect { |k| k.children }.flatten.include?(j)
			}

			children.each { |c|
				parent_node.children << c
			}

			children.each { |c|
				c.children << node_map
			}

			children_children.each { |i|
				node_map.children << i
			}
		end
	}
end

#move_up ⇒ Object

Moves answer down relative to other answers by swapping parent and children



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# File 'lib/active_record_survey/node/answer/chained.rb', line 57

def move_up
	# Ensure each parent node to this node (the goal here is to hit a question node) is valid
	!self.survey.node_maps.select { |i|
		i.node == self
	}.collect { |node_map|
		# Parent must be an answer - cannot move into the position of a Question!
		if !node_map.parent.nil? && node_map.parent.node.class.ancestors.include?(::ActiveRecordSurvey::Node::Answer)
			# I know this looks overly complicated, but we need to always work with the survey.node_maps - never children/parent of the relation
			parent_node = self.survey.node_maps.select { |j|
				node_map.parent == j
			}.first

			parent_parent = self.survey.node_maps.select { |j|
				node_map.parent.parent == j
			}.first

			node_map.parent = parent_parent
			parent_parent.children << node_map

			self.survey.node_maps.select { |j|
				node_map.children.include?(j)
			}.each { |c|
				c.parent = parent_node
				parent_node.children << c
			}

			parent_node.parent = node_map
			node_map.children << parent_node
		end
	}
end

#sibling_index ⇒ Object

Gets index relative to other chained answers



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# File 'lib/active_record_survey/node/answer/chained.rb', line 11

def sibling_index
	if node_map = self.survey.node_maps.select { |i|
		i.node == self
	}.first
		return node_map.ancestors_until_node_not_ancestor_of(::ActiveRecordSurvey::Node::Answer).length-1
	end

	return 0
end