703 lines
22 KiB
Ruby
703 lines
22 KiB
Ruby
require_dependency 'distributed_mutex'
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require_dependency 'user_action_manager'
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class PostAlerter
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def self.post_created(post, opts = {})
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PostAlerter.new(opts).after_save_post(post, true)
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post
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end
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def initialize(default_opts = {})
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@default_opts = default_opts
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end
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def not_allowed?(user, post)
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user.blank? ||
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user.bot? ||
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user.id == post.user_id
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end
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def all_allowed_users(post)
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@all_allowed_users ||= post.topic.all_allowed_users.reject { |u| not_allowed?(u, post) }
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end
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def allowed_users(post)
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@allowed_users ||= post.topic.allowed_users.reject { |u| not_allowed?(u, post) }
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end
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def allowed_group_users(post)
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@allowed_group_users ||= post.topic.allowed_group_users.reject { |u| not_allowed?(u, post) }
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end
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def directly_targeted_users(post)
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allowed_users(post) - allowed_group_users(post)
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end
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def indirectly_targeted_users(post)
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allowed_group_users(post)
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end
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def only_allowed_users(users, post)
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return users unless post.topic.private_message?
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users.select { |u| all_allowed_users(post).include?(u) }
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end
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def notify_about_reply?(post)
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# small actions can be whispers in this case they will have an action code
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# we never want to notify on this
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post.post_type == Post.types[:regular] ||
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(post.post_type == Post.types[:whisper] && post.action_code.nil?)
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end
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def after_save_post(post, new_record = false)
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notified = [post.user, post.last_editor].uniq
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# mentions (users/groups)
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mentioned_groups, mentioned_users = extract_mentions(post)
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if mentioned_groups || mentioned_users
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mentioned_opts = {}
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editor = post.last_editor
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if post.last_editor_id != post.user_id
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# Mention comes from an edit by someone else, so notification should say who added the mention.
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mentioned_opts = { user_id: editor.id, original_username: editor.username, display_username: editor.username }
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end
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expand_group_mentions(mentioned_groups, post) do |group, users|
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users = only_allowed_users(users, post)
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notified += notify_users(users - notified, :group_mentioned, post, mentioned_opts.merge(group: group))
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end
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if mentioned_users
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mentioned_users = only_allowed_users(mentioned_users, post)
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notified += notify_users(mentioned_users - notified, :mentioned, post, mentioned_opts)
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end
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end
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# replies
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reply_to_user = post.reply_notification_target
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if new_record && reply_to_user && !notified.include?(reply_to_user) && notify_about_reply?(post)
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notified += notify_non_pm_users(reply_to_user, :replied, post)
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end
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# quotes
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quoted_users = extract_quoted_users(post)
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notified += notify_non_pm_users(quoted_users - notified, :quoted, post)
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# linked
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linked_users = extract_linked_users(post)
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notified += notify_non_pm_users(linked_users - notified, :linked, post)
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# private messages
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if new_record
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if post.topic.private_message?
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notify_pm_users(post, reply_to_user, notified)
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elsif notify_about_reply?(post)
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notify_post_users(post, notified)
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end
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end
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sync_group_mentions(post, mentioned_groups)
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if new_record && post.post_number == 1
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topic = post.topic
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if topic.present?
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watchers = category_watchers(topic) + tag_watchers(topic) + group_watchers(topic)
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notify_first_post_watchers(post, watchers)
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end
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end
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end
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def group_watchers(topic)
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GroupUser.where(
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group_id: topic.allowed_groups.pluck(:group_id),
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notification_level: GroupUser.notification_levels[:watching_first_post]
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).pluck(:user_id)
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end
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def tag_watchers(topic)
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topic.tag_users
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.where(notification_level: TagUser.notification_levels[:watching_first_post])
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.pluck(:user_id)
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end
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def category_watchers(topic)
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topic.category_users
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.where(notification_level: CategoryUser.notification_levels[:watching_first_post])
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.pluck(:user_id)
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end
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def notify_first_post_watchers(post, user_ids)
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return if user_ids.blank?
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user_ids.uniq!
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warn_if_not_sidekiq
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# Don't notify the OP
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user_ids -= [post.user_id]
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users = User.where(id: user_ids)
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DiscourseEvent.trigger(:before_create_notifications_for_users, users, post)
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users.each do |user|
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create_notification(user, Notification.types[:watching_first_post], post)
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end
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end
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def sync_group_mentions(post, mentioned_groups)
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GroupMention.where(post_id: post.id).destroy_all
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return if mentioned_groups.blank?
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mentioned_groups.each do |group|
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GroupMention.create(post_id: post.id, group_id: group.id)
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end
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end
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def unread_posts(user, topic)
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Post.secured(Guardian.new(user))
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.where('post_number > COALESCE((
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SELECT last_read_post_number FROM topic_users tu
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WHERE tu.user_id = ? AND tu.topic_id = ? ),0)',
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user.id, topic.id)
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.where('reply_to_user_id = ? OR exists(
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SELECT 1 from topic_users tu
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WHERE tu.user_id = ? AND
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tu.topic_id = ? AND
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notification_level = ?
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)', user.id, user.id, topic.id, TopicUser.notification_levels[:watching])
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.where(topic_id: topic.id)
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end
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def first_unread_post(user, topic)
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unread_posts(user, topic).order('post_number').first
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end
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def unread_count(user, topic)
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unread_posts(user, topic).count
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end
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def destroy_notifications(user, types, topic)
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return if user.blank?
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return unless Guardian.new(user).can_see?(topic)
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User.transaction do
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user.notifications.where(
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notification_type: types,
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topic_id: topic.id
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).destroy_all
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# Reload so notification counts sync up correctly
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user.reload
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end
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end
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NOTIFIABLE_TYPES = [:mentioned, :replied, :quoted, :posted, :linked, :private_message, :group_mentioned, :watching_first_post].map { |t|
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Notification.types[t]
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}
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def group_stats(topic)
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sql = <<~SQL
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SELECT COUNT(*) FROM topics t
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JOIN topic_allowed_groups g ON g.group_id = :group_id AND g.topic_id = t.id
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LEFT JOIN group_archived_messages a ON a.topic_id = t.id AND a.group_id = g.group_id
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WHERE a.id IS NULL AND t.deleted_at is NULL AND t.archetype = 'private_message'
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SQL
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topic.allowed_groups.map do |g|
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{
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group_id: g.id,
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group_name: g.name.downcase,
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inbox_count: DB.query_single(sql, group_id: g.id).first.to_i
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}
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end
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end
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def notify_group_summary(user, post)
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@group_stats ||= {}
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stats = (@group_stats[post.topic_id] ||= group_stats(post.topic))
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return unless stats
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group_id = post.topic
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.topic_allowed_groups
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.where(group_id: user.groups.pluck(:id))
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.pluck(:group_id).first
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stat = stats.find { |s| s[:group_id] == group_id }
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return unless stat && stat[:inbox_count] > 0
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notification_type = Notification.types[:group_message_summary]
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DistributedMutex.synchronize("group_message_notify_#{user.id}") do
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Notification.where(notification_type: notification_type, user_id: user.id).each do |n|
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n.destroy if n.data_hash[:group_id] == stat[:group_id]
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end
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Notification.create(
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notification_type: notification_type,
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user_id: user.id,
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data: {
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group_id: stat[:group_id],
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group_name: stat[:group_name],
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inbox_count: stat[:inbox_count],
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username: user.username_lower
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}.to_json
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)
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end
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# TODO decide if it makes sense to also publish a desktop notification
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end
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def should_notify_edit?(notification, opts)
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return notification.data_hash["display_username"] != opts[:display_username]
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end
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def should_notify_like?(user, notification)
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return true if user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:always]
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return true if user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:first_time_and_daily] && notification.created_at < 1.day.ago
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false
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end
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def should_notify_previous?(user, notification, opts)
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case notification.notification_type
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when Notification.types[:edited] then should_notify_edit?(notification, opts)
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when Notification.types[:liked] then should_notify_like?(user, notification)
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else false
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end
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end
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COLLAPSED_NOTIFICATION_TYPES ||= [
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Notification.types[:replied],
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Notification.types[:quoted],
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Notification.types[:posted],
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Notification.types[:private_message],
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]
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def create_notification(user, type, post, opts = {})
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opts = @default_opts.merge(opts)
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DiscourseEvent.trigger(:before_create_notification, user, type, post, opts)
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return if user.blank? || user.bot?
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is_liked = type == Notification.types[:liked]
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return if is_liked && user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:never]
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# Make sure the user can see the post
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return unless Guardian.new(user).can_see?(post)
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return if user.staged? && post.topic.category&.mailinglist_mirror?
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notifier_id = opts[:user_id] || post.user_id # xxxxx look at revision history
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# apply muting here
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return if notifier_id && MutedUser.where(user_id: user.id, muted_user_id: notifier_id)
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.joins(:muted_user)
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.where('NOT admin AND NOT moderator')
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.exists?
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# apply ignored here
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return if notifier_id && IgnoredUser.where(user_id: user.id, ignored_user_id: notifier_id)
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.joins(:ignored_user)
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.where('NOT admin AND NOT moderator')
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.exists?
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# skip if muted on the topic
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return if TopicUser.where(
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topic: post.topic,
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user: user,
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notification_level: TopicUser.notification_levels[:muted]
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).exists?
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# skip if muted on the group
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if group = opts[:group]
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return if GroupUser.where(
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group_id: opts[:group_id],
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user_id: user.id,
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notification_level: TopicUser.notification_levels[:muted]
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).exists?
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end
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# Don't notify the same user about the same notification on the same post
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existing_notification = user.notifications
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.order("notifications.id DESC")
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.find_by(
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topic_id: post.topic_id,
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post_number: post.post_number,
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notification_type: type
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)
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return if existing_notification && !should_notify_previous?(user, existing_notification, opts)
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notification_data = {}
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if is_liked
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if existing_notification &&
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existing_notification.created_at > 1.day.ago &&
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(
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user.user_option.like_notification_frequency ==
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UserOption.like_notification_frequency_type[:always]
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)
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data = existing_notification.data_hash
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notification_data["username2"] = data["display_username"]
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notification_data["count"] = (data["count"] || 1).to_i + 1
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# don't use destroy so we don't trigger a notification count refresh
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Notification.where(id: existing_notification.id).destroy_all
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elsif !SiteSetting.likes_notification_consolidation_threshold.zero?
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notification = consolidate_liked_notifications(
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user,
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post,
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opts[:display_username]
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)
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return notification if notification
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end
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end
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collapsed = false
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if COLLAPSED_NOTIFICATION_TYPES.include?(type)
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destroy_notifications(user, COLLAPSED_NOTIFICATION_TYPES, post.topic)
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collapsed = true
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end
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original_post = post
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original_username = opts[:display_username].presence || post.username
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if collapsed
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post = first_unread_post(user, post.topic) || post
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count = unread_count(user, post.topic)
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if count > 1
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I18n.with_locale(user.effective_locale) do
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opts[:display_username] = I18n.t('embed.replies', count: count)
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end
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end
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end
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UserActionManager.notification_created(original_post, user, type, opts[:acting_user_id])
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topic_title = post.topic.title
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# when sending a private message email, keep the original title
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if post.topic.private_message? && modifications = post.revisions.map(&:modifications)
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if first_title_modification = modifications.find { |m| m.has_key?("title") }
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topic_title = first_title_modification["title"][0]
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end
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end
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notification_data.merge!(topic_title: topic_title,
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original_post_id: original_post.id,
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original_post_type: original_post.post_type,
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original_username: original_username,
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revision_number: opts[:revision_number],
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display_username: opts[:display_username] || post.user.username)
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if group = opts[:group]
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notification_data[:group_id] = group.id
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notification_data[:group_name] = group.name
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end
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if original_post.via_email && (incoming_email = original_post.incoming_email)
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skip_send_email = contains_email_address?(incoming_email.to_addresses, user) ||
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contains_email_address?(incoming_email.cc_addresses, user)
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else
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skip_send_email = opts[:skip_send_email]
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end
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# Create the notification
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created = user.notifications.create!(
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notification_type: type,
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topic_id: post.topic_id,
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post_number: post.post_number,
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post_action_id: opts[:post_action_id],
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data: notification_data.to_json,
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skip_send_email: skip_send_email
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)
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if created.id && !existing_notification && NOTIFIABLE_TYPES.include?(type) && !user.suspended?
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create_notification_alert(user: user, post: original_post, notification_type: type, username: original_username)
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end
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created.id ? created : nil
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end
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def create_notification_alert(user:, post:, notification_type:, excerpt: nil, username: nil)
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if post_url = post.url
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payload = {
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notification_type: notification_type,
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post_number: post.post_number,
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topic_title: post.topic.title,
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topic_id: post.topic.id,
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excerpt: excerpt || post.excerpt(400, text_entities: true, strip_links: true, remap_emoji: true),
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username: username || post.username,
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post_url: post_url
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}
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MessageBus.publish("/notification-alert/#{user.id}", payload, user_ids: [user.id])
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push_notification(user, payload)
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DiscourseEvent.trigger(:post_notification_alert, user, payload)
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end
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end
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def contains_email_address?(addresses, user)
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return false if addresses.blank?
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addresses.split(";").include?(user.email)
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end
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def push_notification(user, payload)
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if user.push_subscriptions.exists?
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Jobs.enqueue(:send_push_notification, user_id: user.id, payload: payload)
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end
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if SiteSetting.allow_user_api_key_scopes.split("|").include?("push") && SiteSetting.allowed_user_api_push_urls.present?
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clients = user.user_api_keys
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.where("('push' = ANY(scopes) OR 'notifications' = ANY(scopes))")
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.where("push_url IS NOT NULL")
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.where("position(push_url IN ?) > 0", SiteSetting.allowed_user_api_push_urls)
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.where("revoked_at IS NULL")
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.pluck(:client_id, :push_url)
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if clients.length > 0
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Jobs.enqueue(:push_notification, clients: clients, payload: payload, user_id: user.id)
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end
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end
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end
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def expand_group_mentions(groups, post)
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return unless post.user && groups
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Group.mentionable(post.user).where(id: groups.map(&:id)).each do |group|
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next if group.user_count >= SiteSetting.max_users_notified_per_group_mention
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yield group, group.users
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end
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end
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# TODO: Move to post-analyzer?
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def extract_mentions(post)
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mentions = post.raw_mentions
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return if mentions.blank?
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groups = Group.where('LOWER(name) IN (?)', mentions)
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mentions -= groups.map(&:name).map(&:downcase)
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groups = nil if groups.empty?
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if mentions.present?
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users = User.where(username_lower: mentions).where.not(id: post.user_id)
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users = nil if users.empty?
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end
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[groups, users]
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end
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# TODO: Move to post-analyzer?
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# Returns a list of users who were quoted in the post
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def extract_quoted_users(post)
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post.raw.scan(/\[quote=\"([^,]+),.+\"\]/).uniq.map do |m|
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User.find_by("username_lower = :username AND id != :id", username: m.first.strip.downcase, id: post.user_id)
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end.compact
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end
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def extract_linked_users(post)
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post.topic_links.where(reflection: false).map do |link|
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linked_post = link.link_post
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if !linked_post && topic = link.link_topic
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linked_post = topic.posts.find_by(post_number: 1)
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end
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(linked_post && post.user_id != linked_post.user_id && linked_post.user) || nil
|
|
end.compact
|
|
end
|
|
|
|
# Notify a bunch of users
|
|
def notify_non_pm_users(users, type, post, opts = {})
|
|
return [] if post.topic&.private_message?
|
|
|
|
notify_users(users, type, post, opts)
|
|
end
|
|
|
|
def notify_users(users, type, post, opts = {})
|
|
users = [users] unless users.is_a?(Array)
|
|
users = users.reject { |u| u.staged? } if post.topic&.private_message?
|
|
|
|
warn_if_not_sidekiq
|
|
|
|
DiscourseEvent.trigger(:before_create_notifications_for_users, users, post)
|
|
users.each do |u|
|
|
create_notification(u, Notification.types[type], post, opts)
|
|
end
|
|
|
|
users
|
|
end
|
|
|
|
def notify_pm_users(post, reply_to_user, notified)
|
|
return unless post.topic
|
|
|
|
warn_if_not_sidekiq
|
|
|
|
# users that aren't part of any mentioned groups
|
|
users = directly_targeted_users(post).reject { |u| notified.include?(u) }
|
|
DiscourseEvent.trigger(:before_create_notifications_for_users, users, post)
|
|
users.each do |user|
|
|
notification_level = TopicUser.get(post.topic, user)&.notification_level
|
|
if reply_to_user == user || notification_level == TopicUser.notification_levels[:watching] || user.staged?
|
|
create_notification(user, Notification.types[:private_message], post)
|
|
end
|
|
end
|
|
|
|
# users that are part of all mentionned groups
|
|
users = indirectly_targeted_users(post).reject { |u| notified.include?(u) }
|
|
DiscourseEvent.trigger(:before_create_notifications_for_users, users, post)
|
|
users.each do |user|
|
|
case TopicUser.get(post.topic, user)&.notification_level
|
|
when TopicUser.notification_levels[:watching]
|
|
# only create a notification when watching the group
|
|
create_notification(user, Notification.types[:private_message], post)
|
|
when TopicUser.notification_levels[:tracking]
|
|
notify_group_summary(user, post)
|
|
end
|
|
end
|
|
end
|
|
|
|
def notify_post_users(post, notified)
|
|
return unless post.topic
|
|
|
|
warn_if_not_sidekiq
|
|
|
|
condition = <<~SQL
|
|
id IN (
|
|
SELECT user_id
|
|
FROM topic_users
|
|
WHERE notification_level = :watching
|
|
AND topic_id = :topic_id
|
|
|
|
UNION
|
|
|
|
SELECT cu.user_id
|
|
FROM category_users cu
|
|
LEFT JOIN topic_users tu ON tu.user_id = cu.user_id
|
|
AND tu.topic_id = :topic_id
|
|
WHERE cu.notification_level = :watching
|
|
AND cu.category_id = :category_id
|
|
AND tu.user_id IS NULL
|
|
|
|
/*tags*/
|
|
)
|
|
SQL
|
|
|
|
tag_ids = post.topic.topic_tags.pluck('topic_tags.tag_id')
|
|
|
|
if tag_ids.present?
|
|
condition.sub! "/*tags*/", <<~SQL
|
|
UNION
|
|
|
|
SELECT tag_users.user_id
|
|
FROM tag_users
|
|
LEFT JOIN topic_users tu ON tu.user_id = tag_users.user_id
|
|
AND tu.topic_id = :topic_id
|
|
WHERE tag_users.notification_level = :watching
|
|
AND tag_users.tag_id IN (:tag_ids)
|
|
AND tu.user_id IS NULL
|
|
SQL
|
|
end
|
|
|
|
notify = User.where(condition,
|
|
watching: TopicUser.notification_levels[:watching],
|
|
topic_id: post.topic_id,
|
|
category_id: post.topic.category_id,
|
|
tag_ids: tag_ids
|
|
)
|
|
|
|
exclude_user_ids = notified.map(&:id)
|
|
notify = notify.where("id NOT IN (?)", exclude_user_ids) if exclude_user_ids.present?
|
|
|
|
DiscourseEvent.trigger(:before_create_notifications_for_users, notify, post)
|
|
notify.pluck(:id).each do |user_id|
|
|
user = User.find_by(id: user_id)
|
|
create_notification(user, Notification.types[:posted], post)
|
|
end
|
|
end
|
|
|
|
def warn_if_not_sidekiq
|
|
Rails.logger.warn("PostAlerter.#{caller_locations(1, 1)[0].label} was called outside of sidekiq") unless Sidekiq.server?
|
|
end
|
|
|
|
private
|
|
|
|
def consolidate_liked_notifications(user, post, username)
|
|
user_notifications = user.notifications
|
|
|
|
consolidation_window =
|
|
SiteSetting.likes_notification_consolidation_window_mins.minutes.ago
|
|
|
|
liked_by_user_notifications =
|
|
user_notifications
|
|
.filter_by_display_username_and_type(
|
|
username, Notification.types[:liked]
|
|
)
|
|
.where(
|
|
"created_at > ? AND data::json ->> 'username2' IS NULL",
|
|
consolidation_window
|
|
)
|
|
|
|
user_liked_consolidated_notification =
|
|
user_notifications
|
|
.filter_by_display_username_and_type(
|
|
username, Notification.types[:liked_consolidated]
|
|
)
|
|
.where("created_at > ?", consolidation_window)
|
|
.first
|
|
|
|
if user_liked_consolidated_notification
|
|
return update_consolidated_liked_notification_count!(
|
|
user_liked_consolidated_notification
|
|
)
|
|
elsif (
|
|
liked_by_user_notifications.count >=
|
|
SiteSetting.likes_notification_consolidation_threshold
|
|
)
|
|
return create_consolidated_liked_notification!(
|
|
liked_by_user_notifications,
|
|
post,
|
|
username
|
|
)
|
|
end
|
|
end
|
|
|
|
def update_consolidated_liked_notification_count!(notification)
|
|
data = notification.data_hash
|
|
data["count"] += 1
|
|
|
|
notification.update!(
|
|
data: data.to_json,
|
|
read: false
|
|
)
|
|
|
|
notification
|
|
end
|
|
|
|
def create_consolidated_liked_notification!(notifications, post, username)
|
|
notification = nil
|
|
|
|
Notification.transaction do
|
|
timestamp = notifications.last.created_at
|
|
|
|
notification = Notification.create!(
|
|
notification_type: Notification.types[:liked_consolidated],
|
|
user_id: post.user_id,
|
|
data: {
|
|
username: username,
|
|
display_username: username,
|
|
count: notifications.count + 1
|
|
}.to_json,
|
|
updated_at: timestamp,
|
|
created_at: timestamp
|
|
)
|
|
|
|
notifications.each(&:destroy!)
|
|
end
|
|
|
|
notification
|
|
end
|
|
end
|