428 lines
14 KiB
Ruby
428 lines
14 KiB
Ruby
class PostAlerter
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def self.post_created(post)
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alerter = PostAlerter.new
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alerter.after_save_post(post, true)
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post
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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.id == Discourse::SYSTEM_USER_ID ||
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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 after_save_post(post, new_record = false)
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notified = [post.user]
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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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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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editor = post.last_editor
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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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notify_non_pm_users(users - notified, :group_mentioned, post, mentioned_opts.merge({group: group}))
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notified += users
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end
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if mentioned_users
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notify_non_pm_users(mentioned_users - notified, :mentioned, post, mentioned_opts)
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notified += mentioned_users
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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) && post.post_type == Post.types[:regular]
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notify_non_pm_users(reply_to_user, :replied, post)
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notified += [reply_to_user]
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end
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# quotes
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quoted_users = extract_quoted_users(post)
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notify_non_pm_users(quoted_users - notified, :quoted, post)
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notified += quoted_users
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# linked
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linked_users = extract_linked_users(post)
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notify_non_pm_users(linked_users - notified, :linked, post)
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notified += linked_users
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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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# users that aren't part of any mentioned groups
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directly_targeted_users(post).each do |user|
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notification_level = TopicUser.get(post.topic, user).try(:notification_level)
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if notified.include?(user) || notification_level == TopicUser.notification_levels[:watching]
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create_notification(user, Notification.types[:private_message], post)
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end
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end
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# users that are part of all mentionned groups
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indirectly_targeted_users(post).each do |user|
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# only create a notification when watching the group
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notification_level = TopicUser.get(post.topic, user).try(:notification_level)
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if notification_level == TopicUser.notification_levels[:watching]
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create_notification(user, Notification.types[:private_message], post)
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elsif notification_level == TopicUser.notification_levels[:tracking]
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if notified.include?(user)
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create_notification(user, Notification.types[:private_message], post)
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else
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notify_group_summary(user, post)
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end
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end
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end
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elsif post.post_type == Post.types[:regular]
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# If it's not a private message and it's not an automatic post caused by a moderator action, notify the users
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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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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, type, 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.notifications.where(notification_type: type,
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topic_id: topic.id).destroy_all
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# HACK so notification counts sync up correctly
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user.reload
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end
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NOTIFIABLE_TYPES = [:mentioned, :replied, :quoted, :posted, :linked, :private_message, :group_mentioned].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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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: Topic.exec_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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group_id: g.id).values[0][0].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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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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# 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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return 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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]
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def create_notification(user, type, post, opts=nil)
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return if user.blank?
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return if user.id == Discourse::SYSTEM_USER_ID
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return if type == Notification.types[:liked] && user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:never]
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opts ||= {}
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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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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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# skip if muted on the topic
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return if TopicUser.get(post.topic, user).try(:notification_level) == TopicUser.notification_levels[:muted]
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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.find_by(group_id: opts[:group_id], user_id: user.id).try(:notification_level) == TopicUser.notification_levels[:muted]
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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(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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return if existing_notification && !should_notify_previous?(user, existing_notification, opts)
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notification_data = {}
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if existing_notification &&
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existing_notification.created_at > 1.day.ago &&
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user.user_option.like_notification_frequency == UserOption.like_notification_frequency_type[:always]
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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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end
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collapsed = false
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if COLLAPSED_NOTIFICATION_TYPES.include?(type)
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COLLAPSED_NOTIFICATION_TYPES.each do |t|
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destroy_notifications(user, t, post.topic)
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end
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collapsed = true
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end
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if type == Notification.types[:private_message]
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destroy_notifications(user, type, 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] || post.username # xxxxx need something here too
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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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UserActionObserver.log_notification(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!({
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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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display_username: opts[:display_username] || post.user.username
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})
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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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# Create the notification
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user.notifications.create(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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if !existing_notification && NOTIFIABLE_TYPES.include?(type)
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# we may have an invalid post somehow, dont blow up
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post_url = original_post.url rescue nil
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if post_url
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MessageBus.publish("/notification-alert/#{user.id}", {
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notification_type: type,
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post_number: original_post.post_number,
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topic_title: original_post.topic.title,
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topic_id: original_post.topic.id,
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excerpt: original_post.excerpt(400, text_entities: true, strip_links: true),
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username: original_username,
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post_url: post_url
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}, user_ids: [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 unless mentions && mentions.length > 0
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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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return [groups, nil] unless mentions && mentions.length > 0
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users = User.where(username_lower: mentions).where.not(id: post.user_id)
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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(post_number: 1).first
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end
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(linked_post && post.user_id != linked_post.user_id && linked_post.user) || nil
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end.compact
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end
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# Notify a bunch of users
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def notify_non_pm_users(users, type, post, opts=nil)
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return if post.topic.try(:private_message?)
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users = [users] unless users.is_a?(Array)
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users.each do |u|
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create_notification(u, Notification.types[type], post, opts)
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end
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end
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def notify_post_users(post, notified)
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notify = TopicUser.where(topic_id: post.topic_id)
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.where(notification_level: TopicUser.notification_levels[:watching])
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exclude_user_ids = notified.map(&:id)
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notify = notify.where("user_id NOT IN (?)", exclude_user_ids) if exclude_user_ids.present?
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notify.includes(:user).each do |tu|
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create_notification(tu.user, Notification.types[:posted], post)
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end
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end
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end
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