Add janitor selectable background color per image

app/controllers/posts_controller.rb

@@ -153,7 +153,7 @@ private
       edit_reason
       has_embedded_notes
     ]
-    permitted_params += %i[is_rating_locked is_note_locked] if CurrentUser.is_janitor?
+    permitted_params += %i[is_rating_locked is_note_locked bg_color] if CurrentUser.is_janitor?
     permitted_params += %i[is_status_locked locked_tags hide_from_anonymous hide_from_search_engines] if CurrentUser.is_admin?
 
     params.require(:post).permit(permitted_params)

app/models/post.rb

@@ -17,10 +17,12 @@ class Post < ApplicationRecord
   before_validation :apply_tag_diff, if: :should_process_tags?
   before_validation :normalize_tags, if: :should_process_tags?
   before_validation :strip_source
+  before_validation :fix_bg_color
   before_validation :blank_out_nonexistent_parents
   before_validation :remove_parent_loops
   validates :md5, uniqueness: { :on => :create, message: ->(obj, data) {"duplicate: #{Post.find_by_md5(obj.md5).id}"} }
   validates :rating, inclusion: { in: %w(s q e), message: "rating must be s, q, or e" }
+  validates :bg_color, format: { with: /\A[A-Fa-f0-9]{6}\z/ }, allow_nil: true
   validates :description, length: { maximum: 50_000 }
   validate :tag_names_are_valid, if: :should_process_tags?
   validate :added_tags_are_valid, if: :should_process_tags?
@@ -1860,6 +1862,12 @@ class Post < ApplicationRecord
   end
 
   module ValidationMethods
+    def fix_bg_color
+      if bg_color.blank?
+        self.bg_color = nil
+      end
+    end
+
     def post_is_not_its_own_parent
       if !new_record? && id == parent_id
         errors[:base] << "Post cannot have itself as a parent"

app/presenters/post_presenter.rb

@@ -133,6 +133,10 @@ class PostPresenter < Presenter
       "data-is-favorited" => post.favorited_by?(CurrentUser.user.id)
     }
 
+    if post.bg_color
+      attributes['style'] = "background-color: ##{post.bg_color}"
+    end
+
     if post.visible?
       attributes["data-md5"] = post.md5
       attributes["data-file-url"] = post.file_url

app/views/posts/partials/show/_edit.html.erb

@@ -96,6 +96,11 @@
         <% end %>
       </fieldset>
     </div>
+
+    <div class="input">
+      <%= f.label :bg_color, "Background Color" %>
+      <%= f.text_field :bg_color, :size => 6 %>
+    </div>
   <% end %>
 
   <% if CurrentUser.is_admin? %>

db/migrate/20191231162515_add_post_background_color.rb

@@ -0,0 +1,5 @@
+class AddPostBackgroundColor < ActiveRecord::Migration[6.0]
+  def change
+    add_column :posts, :bg_color, :string, null: true
+  end
+end

db/structure.sql

@@ -1989,7 +1989,8 @@ CREATE TABLE public.posts (
     description text DEFAULT ''::text NOT NULL,
     comment_count integer DEFAULT 0 NOT NULL,
     change_seq bigint NOT NULL,
-    tag_count_lore integer DEFAULT 0 NOT NULL
+    tag_count_lore integer DEFAULT 0 NOT NULL,
+    bg_color character varying
 );
 
 
@@ -5336,6 +5337,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20191006073950'),
 ('20191006143246'),
 ('20191013233447'),
-('20191116032230');
+('20191116032230'),
+('20191231162515');