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Add blurhash to preview cards (#13984)

Fixes #13001
main
ThibG 2 years ago
committed by GitHub
parent
commit
346d9b3d2e
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
  1. 9
      app/models/preview_card.rb
  2. 2
      app/serializers/rest/preview_card_serializer.rb
  3. 5
      db/migrate/20200605155027_add_blurhash_to_preview_cards.rb
  4. 4
      db/schema.rb
  5. 2
      lib/paperclip/blurhash_transcoder.rb

9
app/models/preview_card.rb

@ -23,19 +23,25 @@
# updated_at :datetime not null
# embed_url :string default(""), not null
# image_storage_schema_version :integer
# blurhash :string
#
class PreviewCard < ApplicationRecord
IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
LIMIT = 1.megabytes
BLURHASH_OPTIONS = {
x_comp: 4,
y_comp: 4,
}.freeze
self.inheritance_column = false
enum type: [:link, :photo, :video, :rich]
has_and_belongs_to_many :statuses
has_attached_file :image, styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 80 -strip' }
has_attached_file :image, processors: [:thumbnail, :blurhash_transcoder], styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 80 -strip' }
include Attachmentable
@ -72,6 +78,7 @@ class PreviewCard < ApplicationRecord
geometry: '400x400>',
file_geometry_parser: FastGeometryParser,
convert_options: '-coalesce -strip',
blurhash: BLURHASH_OPTIONS,
},
}

2
app/serializers/rest/preview_card_serializer.rb

@ -6,7 +6,7 @@ class REST::PreviewCardSerializer < ActiveModel::Serializer
attributes :url, :title, :description, :type,
:author_name, :author_url, :provider_name,
:provider_url, :html, :width, :height,
:image, :embed_url
:image, :embed_url, :blurhash
def image
object.image? ? full_asset_url(object.image.url(:original)) : nil

5
db/migrate/20200605155027_add_blurhash_to_preview_cards.rb

@ -0,0 +1,5 @@
class AddBlurhashToPreviewCards < ActiveRecord::Migration[5.2]
def change
add_column :preview_cards, :blurhash, :string
end
end

4
db/schema.rb

@ -10,8 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 2020_06_01_222558) do
ActiveRecord::Schema.define(version: 2020_06_05_155027) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
@ -648,6 +647,7 @@ ActiveRecord::Schema.define(version: 2020_06_01_222558) do
t.datetime "updated_at", null: false
t.string "embed_url", default: "", null: false
t.integer "image_storage_schema_version"
t.string "blurhash"
t.index ["url"], name: "index_preview_cards_on_url", unique: true
end

2
lib/paperclip/blurhash_transcoder.rb

@ -3,7 +3,7 @@
module Paperclip
class BlurhashTranscoder < Paperclip::Processor
def make
return @file unless options[:style] == :small
return @file unless options[:style] == :small || options[:blurhash]
pixels = convert(':source RGB:-', source: File.expand_path(@file.path)).unpack('C*')
geometry = options.fetch(:file_geometry_parser).from_file(@file)

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