discourse/app/jobs/scheduled/ensure_db_consistency.rb
David Taylor 03818e642a
FEATURE: Include optimized thumbnails for topics (#9215)
This introduces new APIs for obtaining optimized thumbnails for topics. There are a few building blocks required for this:

- Introduces new `image_upload_id` columns on the `posts` and `topics` table. This replaces the old `image_url` column, which means that thumbnails are now restricted to uploads. Hotlinked thumbnails are no longer possible. In normal use (with pull_hotlinked_images enabled), this has no noticeable impact

- A migration attempts to match existing urls to upload records. If a match cannot be found then the posts will be queued for rebake

- Optimized thumbnails are generated during post_process_cooked. If thumbnails are missing when serializing a topic list, then a sidekiq job is queued

- Topic lists and topics now include a `thumbnails` key, which includes all the available images:
   ```
   "thumbnails": [
   {
     "max_width": null,
     "max_height": null,
     "url": "//example.com/original-image.png",
     "width": 1380,
     "height": 1840
   },
   {
     "max_width": 1024,
     "max_height": 1024,
     "url": "//example.com/optimized-image.png",
     "width": 768,
     "height": 1024
   }
   ]
  ```

- Themes can request additional thumbnail sizes by using a modifier in their `about.json` file:
   ```
    "modifiers": {
      "topic_thumbnail_sizes": [
        [200, 200],
        [800, 800]
      ],
      ...
  ```
  Remember that these are generated asynchronously, so your theme should include logic to fallback to other available thumbnails if your requested size has not yet been generated

- Two new raw plugin outlets are introduced, to improve the customisability of the topic list. `topic-list-before-columns` and `topic-list-before-link`
2020-05-05 09:07:50 +01:00

67 lines
1.3 KiB
Ruby

# frozen_string_literal: true
module Jobs
# various consistency checks
class EnsureDbConsistency < ::Jobs::Scheduled
every 12.hours
def execute(args)
start_measure
[
UserVisit,
Group,
Notification,
TopicFeaturedUsers,
PostRevision,
Topic,
Badge,
CategoryUser,
UserOption,
Tag,
CategoryTagStat,
User,
UserAvatar,
Category,
TopicThumbnail
].each do |klass|
klass.ensure_consistency!
measure(klass)
end
UserAction.ensure_consistency!(13.hours.ago)
measure(UserAction)
UserStat.ensure_consistency!(13.hours.ago)
measure(UserStat)
Rails.logger.debug(format_measure)
nil
end
private
def format_measure
result = +"EnsureDbConsitency Times\n"
result << @measure_times.map do |name, duration|
" #{name}: #{duration}"
end.join("\n")
result
end
def start_measure
@measure_times = []
@measure_start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
end
def measure(step = nil)
@measure_now = Process.clock_gettime(Process::CLOCK_MONOTONIC)
if @measure_start
@measure_times << [step, @measure_now - @measure_start]
end
@measure_start = @measure_now
end
end
end