discourse/app/services/post_action_notifier.rb

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class PostActionNotifier
def self.disable
@disabled = true
end
def self.enable
@disabled = false
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end
def self.alerter
@alerter ||= PostAlerter.new
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end
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def self.refresh_like_notification(post, read)
return unless post && post.user_id && post.topic
usernames = post.post_actions.where(post_action_type_id: PostActionType.types[:like])
.joins(:user)
.order('post_actions.created_at desc')
.where('post_actions.created_at > ?', 1.day.ago)
.pluck(:username)
if usernames.length > 0
data = {
topic_title: post.topic.title,
username: usernames[0],
display_username: usernames[0],
username2: usernames[1],
count: usernames.length
}
Notification.create(
notification_type: Notification.types[:liked],
topic_id: post.topic_id,
post_number: post.post_number,
user_id: post.user_id,
read: read,
data: data.to_json
)
end
end
def self.post_action_deleted(post_action)
return if @disabled
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# We only care about deleting post actions for now
return if post_action.deleted_at.blank?
if post_action.post_action_type_id == PostActionType.types[:like] && post_action.post
read = true
Notification.where(
topic_id: post_action.post.topic_id,
user_id: post_action.post.user_id,
post_number: post_action.post.post_number,
notification_type: Notification.types[:liked]
).each do |notification|
read = false unless notification.read
notification.destroy
end
refresh_like_notification(post_action.post, read)
else
# not using destroy_all cause we want stuff to trigger
Notification.where(post_action_id: post_action.id).each(&:destroy)
end
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end
def self.post_action_created(post_action)
return if @disabled
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# We only notify on likes for now
return unless post_action.is_like?
post = post_action.post
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return if post_action.user.blank?
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alerter.create_notification(
post.user,
Notification.types[:liked],
post,
display_username: post_action.user.username,
post_action_id: post_action.id,
user_id: post_action.user_id
)
end
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def self.after_create_post_revision(post_revision)
return if @disabled
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post = post_revision.post
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return unless post
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return if post_revision.user.blank?
return if post_revision.user_id == post.user_id
return if post.topic.blank?
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return if post.topic.private_message?
return if SiteSetting.disable_edit_notifications && post_revision.user_id == Discourse::SYSTEM_USER_ID
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alerter.create_notification(
post.user,
Notification.types[:edited],
post,
display_username: post_revision.user.username,
acting_user_id: post_revision.try(:user_id),
revision_number: post_revision.number
)
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end
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def self.after_post_unhide(post, flaggers)
return if @disabled || post.last_editor.blank? || flaggers.blank?
flaggers.each do |flagger|
alerter.create_notification(
flagger,
Notification.types[:edited],
post,
display_username: post.last_editor.username,
acting_user_id: post.last_editor.id
)
end
end
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end