mirror of
https://github.com/discourse/discourse.git
synced 2024-12-23 06:35:49 +08:00
8f8d88afac
Using CTEs and DISTINCT ON to: - Pre-filter active users with correct preferences - Get only first unread message per channel - Eliminate redundant joins and message scanning This reduces the query execution time by limiting message scanning and joins to only relevant users and messages. Internal ref t/142836 & t/139517
74 lines
2.8 KiB
Ruby
74 lines
2.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Chat
|
|
class Mailer
|
|
def self.send_unread_mentions_summary
|
|
return unless SiteSetting.chat_enabled
|
|
|
|
User
|
|
.real
|
|
.activated
|
|
.not_staged
|
|
.not_suspended
|
|
.where(id: users_with_unreads)
|
|
.find_each do |user|
|
|
if DiscoursePluginRegistry.apply_modifier(:chat_mailer_send_summary_to_user, true, user)
|
|
Jobs.enqueue(
|
|
:user_email,
|
|
type: "chat_summary",
|
|
user_id: user.id,
|
|
force_respect_seen_recently: true,
|
|
)
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def self.users_with_unreads
|
|
groups_join_sql =
|
|
if Chat.allowed_group_ids.include?(Group::AUTO_GROUPS[:everyone])
|
|
""
|
|
else
|
|
"JOIN group_users gu ON gu.user_id = u.id AND gu.group_id IN (#{Chat.allowed_group_ids.join(",")})"
|
|
end
|
|
|
|
DB.query_single <<~SQL
|
|
WITH eligible_users AS (
|
|
SELECT DISTINCT u.id, uo.allow_private_messages
|
|
FROM users u
|
|
JOIN user_options uo ON uo.user_id = u.id
|
|
#{groups_join_sql}
|
|
WHERE u.last_seen_at < now() - interval '15 minutes'
|
|
AND uo.chat_enabled
|
|
AND uo.chat_email_frequency = #{UserOption.chat_email_frequencies[:when_away]}
|
|
AND uo.email_level <> #{UserOption.email_level_types[:never]}
|
|
), channel_messages AS (
|
|
SELECT DISTINCT ON (chat_channel_id) chat_channel_id, cm.id AS first_unread_id, user_id AS sender_id
|
|
FROM chat_messages cm
|
|
JOIN users sender ON sender.id = cm.user_id
|
|
WHERE cm.created_at > now() - interval '7 days'
|
|
AND cm.deleted_at IS NULL
|
|
AND NOT cm.created_by_sdk
|
|
ORDER BY chat_channel_id, cm.id
|
|
)
|
|
SELECT DISTINCT uccm.user_id
|
|
FROM user_chat_channel_memberships uccm
|
|
JOIN chat_channels cc ON cc.id = uccm.chat_channel_id AND cc.deleted_at IS NULL
|
|
JOIN channel_messages cm ON cm.chat_channel_id = cc.id AND cm.sender_id <> uccm.user_id
|
|
JOIN eligible_users eu ON eu.id = uccm.user_id
|
|
LEFT JOIN chat_mentions mn ON mn.chat_message_id = cm.first_unread_id
|
|
LEFT JOIN chat_mention_notifications cmn ON cmn.chat_mention_id = mn.id
|
|
LEFT JOIN notifications n ON n.id = cmn.notification_id AND n.user_id = uccm.user_id
|
|
WHERE NOT uccm.muted
|
|
AND (uccm.last_read_message_id IS NULL OR cm.first_unread_id > uccm.last_read_message_id)
|
|
AND (uccm.last_unread_mention_when_emailed_id IS NULL OR cm.first_unread_id > uccm.last_unread_mention_when_emailed_id)
|
|
AND (
|
|
(cc.chatable_type = 'DirectMessage' AND eu.allow_private_messages) OR
|
|
(cc.chatable_type = 'Category' AND uccm.following AND (n.id IS NULL OR NOT n.read))
|
|
)
|
|
SQL
|
|
end
|
|
end
|
|
end
|