1require_dependency 'archived'
  
2
  
3module Archived
  
4  class DebateOutcome < ActiveRecord::Base
  
5    # By default we want the user to upload a '2x' style image, and we can then
  
6    # resize it down with Imagemagick
  
7    COMMONS_IMAGE_SIZE = { w: 1260.0, h: 710.0 }
  
8
  
 9    belongs_to :petition, touch: true
  
10
  
11    validates :petition, presence: true
  
12    validates :debated_on, presence: true, if: :debated?
  
13    validates :transcript_url, :video_url, :debate_pack_url, length: { maximum: 500 }
  
14
  
15    has_attached_file :commons_image,
  
16      # default_url needs to be a lambda - this way the generated image url will
  
17      # include any asset-digest
  
18      default_url: ->(_) { ActionController::Base.helpers.image_url("graphics/graphic_house-of-commons.jpg") },
  
19      styles: {
  
20        "1x": "#{(COMMONS_IMAGE_SIZE[:w]/2).to_i}x#{(COMMONS_IMAGE_SIZE[:h]/2).to_i}",
  
21        "2x": "#{COMMONS_IMAGE_SIZE[:w]}x#{COMMONS_IMAGE_SIZE[:h]}"
  
22      }
  
23
  
24    validates_attachment_content_type :commons_image, content_type: /\Aimage\/.*\Z/
  
25    validate :validate_commons_image_dimensions, unless: :no_commons_image_queued
  
26
  
27    after_create do
  
28      petition.touch(:debate_outcome_at) unless petition.debate_outcome_at?
  
29    end
  
30
  
31    after_save do
  
32      petition.update_columns(debate_state: debate_state)
  
33    end
  
34
  
35    def date
  
36      debated_on
  
37    end
  
38
  
39    private
  
40
  
41    def debate_state
  
42      debated? ? 'debated' : 'not_debated'
  
43    end
  
44
  
45    def image_ratio(width, height)
  
46      (width.to_f / height.to_f).round(2)
  
47    end
  
48
  
49    def no_commons_image_queued
  
50      commons_image.blank? || !commons_image.queued_for_write[:original]
  
51    end
  
52
  
53    def validate_commons_image_dimensions
  
54      # This should be tuned if the images start looking badly scaled
  
55      max_ratio_delta = 0.1
  
56
  
57      dimensions = Paperclip::Geometry.from_file(commons_image.queued_for_write[:original].path)
  
58
  
59      if dimensions.width < COMMONS_IMAGE_SIZE[:w]
  
60        errors.add(:commons_image, :too_narrow, width: dimensions.width, min_width: COMMONS_IMAGE_SIZE[:w])
  
61      end
  
62
  
63      if dimensions.height < COMMONS_IMAGE_SIZE[:h]
  
64        errors.add(:commons_image, :too_short, height: dimensions.height, min_height: COMMONS_IMAGE_SIZE[:h])
  
65      end
  
66
  
67      expected_ratio = image_ratio(COMMONS_IMAGE_SIZE[:w], COMMONS_IMAGE_SIZE[:h])
  
68      actual_ratio = image_ratio(dimensions.width, dimensions.height)
  
69
  
70      min_ratio = (expected_ratio - max_ratio_delta).round(2)
  
71      max_ratio = (expected_ratio + max_ratio_delta).round(2)
  
72      unless (min_ratio..max_ratio).include? actual_ratio
  
73        errors.add(:commons_image, :incorrect_ratio, ratio: actual_ratio, min_ratio: min_ratio, max_ratio: max_ratio)
  
74      end
  
75    end
  
76  end
  
77end