Class: Elt

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/elt.rb

Overview

This is, in fact, the main parlement class!

It holds all posts, that’s mostly a subject and a body, plus their relationships in a tree of elements

An element is linked to:

  • mail

  • person

  • voters

  • choices

  • attachments

  • subscribers

The element id is generated from the subject for better readability (but only normal characters are used)

Instance Method Summary collapse

Instance Method Details

#add_child(c) ⇒ Object 



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# File 'app/models/elt.rb', line 104

def add_child(c)
	result = super(c)
	p = c
	while p
		if !p.last_activity or p.last_activity < c.created_on then
			p.last_activity = c.created_on
			p.save!
		end
		p = p.parent
	end
	result
end

#all_recipients ⇒ Object

Just a quick method to get all subscribers as a simple list



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# File 'app/models/elt.rb', line 38

def all_recipients
	if parent
		(subscribers + parent.all_recipients).uniq
	else
		subscribers
	end
end

#all_subscriptions ⇒ Object 



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# File 'app/models/elt.rb', line 46

def all_subscriptions
	if parent
		(subscriptions + parent.all_subscriptions).uniq
	else
		subscriptions
	end
end

#before_create ⇒ Object 



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# File 'app/models/elt.rb', line 92

def before_create
	# Let's generate a nice looking id
	self.id ||= new_id =
		subject.gsub(/\[[\w-]*\]/, '').strip \
		.gsub(/\s/, '_').gsub(/[^\w]+/, '') \
		.gsub(/_+/, '_').gsub(/(^_|_$)/, '') if subject
	self.id ||= "elt"

	i = 0
	self.id = "#{new_id}_#{i+=1}" while self.class.find_by_id self.id
end

#move(destination) ⇒ Object

_

|  Root                                                             |
|    ____________________________    ____________________________   |
|   |  Child 1                  |   |  Child 2                  |   |
|   |   __________   _________  |   |   __________   _________  |   |
|   |  |  C 1.1  |  |  C 1.2 |  |   |  |  C 2.1  |  |  C 2.2 |  |   |
1   2  3_________4  5________6  7   8  9_________10 11_______12 13  14
|   |___________________________|   |___________________________|   |
|___________________________________________________________________|



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# File 'app/models/elt.rb', line 128

def move(destination)
	return if self[right_col_name].nil? || self[left_col_name].nil? \
		|| destination[right_col_name].nil? || destination[left_col_name].nil? \
		|| (self[left_col_name] < destination[left_col_name] && destination[right_col_name] < self[right_col_name])

	dif = self[right_col_name] - self[left_col_name] + 1
	moveBy = destination[right_col_name] - self[left_col_name]

	self.class.transaction {
		# Take out of range this very node
		self.class.update_all( "#{left_col_name} = -#{left_col_name}, #{right_col_name} = -#{right_col_name}",
			"#{scope_condition} AND #{self[left_col_name]} <= #{left_col_name} AND #{right_col_name} <= #{self[right_col_name]}" )

		# Shift intermediary elements to the left
		self.class.update_all( "#{left_col_name} = (#{left_col_name} - #{dif})",
			"#{scope_condition} AND #{self[right_col_name]} < #{left_col_name} AND #{left_col_name} < #{destination[right_col_name]}" )
		self.class.update_all( "#{right_col_name} = (#{right_col_name} - #{dif})",
			"#{scope_condition} AND #{self[right_col_name]} < #{right_col_name} AND #{right_col_name} < #{destination[right_col_name]}" )

		# Shift intermediary elements to the right
		self.class.update_all( "#{left_col_name} = (#{left_col_name} + #{dif})",
			"#{scope_condition} AND #{destination[right_col_name]} < #{left_col_name} AND #{left_col_name} < #{self[left_col_name]}" )
		self.class.update_all( "#{right_col_name} = (#{right_col_name} + #{dif})",
			"#{scope_condition} AND #{destination[right_col_name]} <= #{right_col_name} AND #{right_col_name} < #{self[left_col_name]}" )

		# Puts back this element where it should be
		self.class.update_all( "#{left_col_name} = -#{left_col_name} + #{moveBy}, #{right_col_name} = -#{right_col_name} + #{moveBy}",
			"#{scope_condition} AND #{self[left_col_name]} <= -#{left_col_name} AND #{right_col_name} <= -#{self[right_col_name]}" )

		self.parent = destination
		self.save!
	}
end

#publish ⇒ Object

Mail this elt to all subscribers



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# File 'app/models/elt.rb', line 71

def publish
	logger.info "Publish #{subject}"

	self.position = Regexp.last_match(1) if body =~ /^\s*position\s*:\s*(\d+(\.\d+)?)(\s|$)/

	build_mail(:elt => self) unless mail
	mail.publish
	save!

	parent.vote Regexp.last_match(1), person if body =~ /^\s*(-1|0|\+1)(\s|$)/
	if Regexp.last_match(1) and self.body.gsub(/(-1|0|\+1)/, '').strip.empty?
		# Hide simple votes
		vote -1
	else
		vote if person
	end

	parent.add_child(self) unless lft or rgt
	true
end

#result(electoralList = nil) ⇒ Object

Get the vote results



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# File 'app/models/elt.rb', line 63

def result(electoralList = nil)
	#(Choice.count("elt_id = '#{self.id}' AND value = 1") \
	#	- \
	#	Choice.count("elt_id = '#{self.id}' AND value = -1"))
	Choice.sum(:value, :conditions => "elt_id = '#{self.id}'") || 0
end

#vote(value = 1, person = self.person) ⇒ Object 



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# File 'app/models/elt.rb', line 54

def vote(value = 1, person = self.person)
	logger.info "#{person.name if person} vote #{value} on #{subject} #{self.choices}"
	choices.each{ |c| c.destroy if c.person == person }
	choice = choices.build :value => value, :person => person
	choice.save!
	mail.publish if mail
end