mirror of
https://github.com/discourse/discourse.git
synced 2024-11-30 19:54:22 +08:00
73 lines
2.5 KiB
Ruby
73 lines
2.5 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
# This model indicates an 'attempt' to create a topic thumbnail
|
|
# for an upload. This means we don't keep trying to create optimized
|
|
# images for small/invalid original images.
|
|
#
|
|
# Foreign keys with ON DELETE CASCADE are used to ensure unneeded data
|
|
# is deleted automatically
|
|
class TopicThumbnail < ActiveRecord::Base
|
|
belongs_to :upload
|
|
belongs_to :optimized_image
|
|
|
|
def self.find_or_create_for!(original, max_width: , max_height:)
|
|
existing = TopicThumbnail.find_by(upload: original, max_width: max_width, max_height: max_height)
|
|
return existing if existing
|
|
return nil if !SiteSetting.create_thumbnails?
|
|
|
|
target_width, target_height = ImageSizer.resize(original.width, original.height, { max_width: max_width, max_height: max_height })
|
|
|
|
if target_width < original.width && target_height < original.height
|
|
optimized = OptimizedImage.create_for(original, target_width, target_height)
|
|
end
|
|
|
|
# may have been associated already, bulk insert will skip dupes
|
|
TopicThumbnail.insert_all([
|
|
upload_id: original.id,
|
|
max_width: max_width,
|
|
max_height: max_height,
|
|
optimized_image_id: optimized&.id
|
|
])
|
|
|
|
TopicThumbnail.find_by(
|
|
upload: original,
|
|
max_width: max_width,
|
|
max_height: max_height
|
|
)
|
|
end
|
|
|
|
def self.ensure_consistency!
|
|
# Clean up records for broken upload links or broken optimized image links
|
|
TopicThumbnail
|
|
.joins("LEFT JOIN uploads on upload_id = uploads.id")
|
|
.joins("LEFT JOIN optimized_images on optimized_image_id = optimized_images.id")
|
|
.where(<<~SQL)
|
|
(optimized_image_id IS NOT NULL AND optimized_images IS NULL)
|
|
OR uploads IS NULL
|
|
SQL
|
|
.delete_all
|
|
|
|
# Delete records for sizes which are no longer needed
|
|
sizes = Topic.thumbnail_sizes + ThemeModifierHelper.new(theme_ids: Theme.pluck(:id)).topic_thumbnail_sizes
|
|
sizes_sql = sizes.map { |s| "(max_width = #{s[0].to_i} AND max_height = #{s[1].to_i})" }.join(" OR ")
|
|
TopicThumbnail.where.not(sizes_sql).delete_all
|
|
end
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: topic_thumbnails
|
|
#
|
|
# id :bigint not null, primary key
|
|
# upload_id :bigint not null
|
|
# optimized_image_id :bigint
|
|
# max_width :integer not null
|
|
# max_height :integer not null
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_topic_thumbnails_on_optimized_image_id (optimized_image_id)
|
|
# index_topic_thumbnails_on_upload_id (upload_id)
|
|
# unique_topic_thumbnails (upload_id,max_width,max_height) UNIQUE
|
|
#
|