Attachment variants can be requested by name

app/models/campaign.rb

@@ -2,6 +2,7 @@
 
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
 class Campaign < ApplicationRecord
+  include Image::AttachmentExtensions
   # :name,
   # :tagline,
   # :slug, # str: url name
@@ -54,6 +55,9 @@ class Campaign < ApplicationRecord
   has_one_attached :background_image
   has_one_attached :banner_image
 
+  has_one_attached_with_sizes(:main_image, {normal: [524, 360], thumb: [180,150]})
+  has_one_attached_with_sizes(:background_image, {normal: [1000, 600]})
+
   has_many :donations
   has_many :charges, through: :donations
   has_many :payments, through: :donations, source: 'payment'

app/models/concerns/image/attachment_extensions.rb

@@ -0,0 +1,40 @@
+module Image::AttachmentExtensions
+    extend ActiveSupport::Concern
+    class_methods do
+        def has_one_attached_with_sizes(attribute, sizes)
+            if sizes.nil? || !sizes.is_a?(Hash) || !sizes.any?
+                raise ArgumentError, "You must pass a valid hash of sizes"
+            end
+            attribute = attribute.to_s
+
+            # clean up sizes
+            sizes.keys.each do |key|
+                value = sizes[key]
+                if value.is_a?(Numeric)
+                    sizes[key] = [value, value]
+                elsif value.is_a?(Array) && value.count == 1 && value.all?{|i| i.is_a?(Numeric)}
+                    sizes[key]= [value[0], value[0]]
+                elsif value.is_a?(Array) && value.count == 2 && value.all?{|i| i.is_a?(Numeric)}
+                    sizes[key] = [value[0], value[1]]
+                else 
+                    raise ArgumentError, "#{value.to_s} was not a valid size."
+                end
+            end
+
+            class_eval <<-RUBY, __FILE__, __LINE__ + 1
+                def #{attribute}_by_size(size)
+                     case (size)
+                    #{sizes.map do |k,v| 
+                        <<-INNER
+                        when :#{k.to_sym}
+                            return #{attribute}.variant(resize: "#{v[0]}x#{v[1]}")
+                        INNER
+                    end.join("\n")}
+                     else
+                        raise ArgumentError, ":" + size.to_s + " is not a valid size. Valid sizes are: #{sizes.keys.map{|i| ":" + i.to_s}.join(', ')}"
+                     end
+                end
+             RUBY
+        end
+    end
+end

app/models/event.rb

@@ -2,6 +2,7 @@
 
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
 class Event < ApplicationRecord
+  include Image::AttachmentExtensions
   # :deleted, #bool for soft-delete
   # :name, # str
   # :tagline, # str
@@ -64,6 +65,9 @@ class Event < ApplicationRecord
   has_one_attached :main_image
   has_one_attached :background_image
 
+  has_one_attached_with_sizes :main_image, {normal: 400, thumb: 100}
+  has_one_attached_with_sizes :background_image, {normal: [1000, 600]}
+  
 
   scope :not_deleted, -> { where(deleted: [nil, false]) }
   scope :deleted, -> { where(deleted: true) }

app/models/image_attachment.rb

@@ -2,10 +2,13 @@
 
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
 class ImageAttachment < ApplicationRecord
+  include Image::AttachmentExtensions
   # :parent_id,
   # :file
   has_one_attached :file
 
+  has_one_attached_with_sizes :file, {large: [600, 400], medium: [400, 266], small: [400,266], thumb_explore: [200,133]}
+
   # not sure if poly parent is used on this model, as all values are nil in db
   belongs_to :parent, polymorphic: true
 end

app/models/nonprofit.rb

@@ -5,6 +5,7 @@ class Nonprofit < ApplicationRecord
   attr_accessor :register_np_only, :user_id, :user
   Categories = ['Public Benefit', 'Human Services', 'Education', 'Civic Duty', 'Human Rights', 'Animals', 'Environment', 'Health', 'Arts, Culture, Humanities', 'International', 'Children', 'Religion', 'LGBTQ', "Women's Rights", 'Disaster Relief', 'Veterans'].freeze
 
+  include Image::AttachmentExtensions
   # :name, # str
   # :stripe_account_id, # str
   # :summary, # text: paragraph-sized organization summary
@@ -103,6 +104,14 @@ class Nonprofit < ApplicationRecord
   has_one_attached :background_image
   has_one_attached :logo
   
+  # way too wordy
+  has_one_attached_with_sizes(:logo, {small: 30, normal: 100, large: 180})
+  has_one_attached_with_sizes(:background_image, {normal: [1000,600]})
+  has_one_attached_with_sizes(:main_image, {nonprofit_carousel: [590, 338], thumb: [188, 120], thumb_explore: [100, 100]})
+  has_one_attached_with_sizes(:second_image, {nonprofit_carousel: [590, 338], thumb: [188, 120], thumb_explore: [100, 100]})
+  has_one_attached_with_sizes(:third_image, {nonprofit_carousel: [590, 338], thumb: [188, 120], thumb_explore: [100, 100]})
+
+  
   serialize :achievements, Array
   serialize :categories, Array
 

app/models/profile.rb

@@ -2,6 +2,7 @@
 
 # License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
 class Profile < ApplicationRecord
+  include Image::AttachmentExtensions
   # :registered, # bool
   # :mini_bio,
   # :first_name, # str
@@ -26,6 +27,7 @@ class Profile < ApplicationRecord
   serialize :privacy_settings, Array
 
   has_one_attached :picture
+  has_one_attached_with_sizes(:picture, {normal: 150, medium:100, tiny: 50})
 
   belongs_to :user
   has_many :activities # Activities this profile has created