discourse/app/controllers/post_readers_controller.rb
Roman Rizzi 1630dae2db
FEATURE: Publish read state on group messages. (#7989)
* Enable or disable read state based on group attribute

* When read state needs to be published, the minimum unread count is calculated in the topic query. This way, we can know if someone reads the last post

* The option can be enabled/disabled from the UI

* The read indicator will live-updated using message bus

* Show read indicator on every post

* The read indicator now shows read count and can be expanded to see user avatars

* Read count gets updated everytime someone reads a message

* Simplify topic-list read indicator logic

* Unsubscribe from message bus on willDestroyElement, removed unnecesarry values from post-menu, and added a comment to explain where does minimum_unread_count comes from
2019-08-20 09:46:57 -03:00

27 lines
817 B
Ruby

# frozen_string_literal: true
class PostReadersController < ApplicationController
requires_login
def index
post = Post.includes(topic: %i[allowed_groups]).find(params[:id])
read_state = post.topic.allowed_groups.any? { |g| g.publish_read_state? && g.users.include?(current_user) }
raise Discourse::InvalidAccess unless read_state
readers = User
.joins(:topic_users)
.where('topic_users.topic_id = ? AND COALESCE(topic_users.last_read_post_number, 1) >= ?', post.topic_id, post.post_number)
.where.not(id: [current_user.id, post.user_id])
readers = readers.map do |r|
{
id: r.id, avatar_template: r.avatar_template,
username: r.username,
username_lower: r.username_lower
}
end
render_json_dump(post_readers: readers)
end
end