discourse/app/models/post_mover.rb

706 lines
24 KiB
Ruby

# frozen_string_literal: true
class PostMover
attr_reader :original_topic, :destination_topic, :user, :post_ids
def self.move_types
@move_types ||= Enum.new(:new_topic, :existing_topic)
end
def initialize(original_topic, user, post_ids, move_to_pm: false)
@original_topic = original_topic
@user = user
@post_ids = post_ids
@move_to_pm = move_to_pm
end
def to_topic(id, participants: nil, chronological_order: false)
@move_type = PostMover.move_types[:existing_topic]
@chronological_order = chronological_order
topic = Topic.find_by_id(id)
if topic.archetype != @original_topic.archetype &&
[@original_topic.archetype, topic.archetype].include?(Archetype.private_message)
raise Discourse::InvalidParameters
end
Topic.transaction { move_posts_to topic }
add_allowed_users(participants) if participants.present? && @move_to_pm
enqueue_jobs(topic)
topic
end
def to_new_topic(title, category_id = nil, tags = nil)
@move_type = PostMover.move_types[:new_topic]
post = Post.find_by(id: post_ids.first)
raise Discourse::InvalidParameters unless post
archetype = @move_to_pm ? Archetype.private_message : Archetype.default
topic =
Topic.transaction do
new_topic =
Topic.create!(
user: post.user,
title: title,
category_id: category_id,
created_at: post.created_at,
archetype: archetype,
)
DiscourseTagging.tag_topic_by_names(new_topic, Guardian.new(user), tags)
move_posts_to new_topic
watch_new_topic
update_topic_excerpt new_topic
new_topic
end
enqueue_jobs(topic)
topic
end
private
def update_topic_excerpt(topic)
topic.update_excerpt(topic.first_post.excerpt_for_topic)
end
def move_posts_to(topic)
Guardian.new(user).ensure_can_see! topic
@destination_topic = topic
# when a topic contains some posts after moving posts to another topic we shouldn't close it
# two types of posts should prevent a topic from closing:
# 1. regular posts
# 2. almost all whispers
# we should only exclude whispers with action_code: 'split_topic'
# because we use such whispers as a small-action posts when moving posts to the secret message
# (in this case we don't want everyone to see that posts were moved, that's why we use whispers)
original_topic_posts_count =
@original_topic
.posts
.where(
"post_type = ? or (post_type = ? and action_code != 'split_topic')",
Post.types[:regular],
Post.types[:whisper],
)
.count
moving_all_posts = original_topic_posts_count == posts.length
@first_post_number_moved =
posts.first.is_first_post? ? posts[1]&.post_number : posts.first.post_number
create_temp_table
move_each_post
handle_moved_references
create_moderator_post_in_original_topic
update_statistics
update_user_actions
update_last_post_stats
update_upload_security_status
update_bookmarks
close_topic_and_schedule_deletion if moving_all_posts
destination_topic.reload
destination_topic
end
def create_temp_table
DB.exec("DROP TABLE IF EXISTS moved_posts") if Rails.env.test?
DB.exec <<~SQL
CREATE TEMPORARY TABLE moved_posts (
old_topic_id INTEGER,
old_post_id INTEGER,
old_post_number INTEGER,
new_topic_id INTEGER,
new_topic_title VARCHAR,
new_post_id INTEGER,
new_post_number INTEGER
) ON COMMIT DROP;
CREATE INDEX moved_posts_old_post_number ON moved_posts(old_post_number);
CREATE INDEX moved_posts_old_post_id ON moved_posts(old_post_id);
SQL
end
def handle_moved_references
move_incoming_emails
move_notifications
update_reply_counts
update_quotes
move_first_post_replies
delete_post_replies
copy_shifted_post_timings_to_temp
delete_invalid_post_timings
copy_shifted_post_timings_from_temp
move_post_timings
copy_first_post_timings
copy_topic_users
end
def move_each_post
if @chronological_order
move_each_post_chronological
else
move_each_post_sequential
end
end
def move_each_post_sequential
max_post_number = destination_topic.max_post_number + 1
@post_creator = nil
@move_map = {}
@reply_count = {}
posts.each_with_index do |post, offset|
@move_map[post.post_number] = offset + max_post_number
if post.reply_to_post_number.present?
@reply_count[post.reply_to_post_number] = (@reply_count[post.reply_to_post_number] || 0) + 1
end
end
posts.each do |post|
metadata = movement_metadata(post, new_post_number: @move_map[post.post_number])
new_post = post.is_first_post? ? create_first_post(post) : move(post)
store_movement(metadata, new_post)
if @move_to_pm && !destination_topic.topic_allowed_users.exists?(user_id: post.user_id)
destination_topic.topic_allowed_users.create!(user_id: post.user_id)
end
end
end
def move_each_post_chronological
destination_posts = destination_topic.ordered_posts.with_deleted
# drops posts from destination_topic until it finds one that was created after posts.first
min_created_at = posts.first.created_at
moved_posts = destination_posts.drop_while { |post| post.created_at <= min_created_at }
# if no post in destination_topic was created after posts.first it's equal to sequential
if moved_posts.empty?
initial_post_number = destination_topic.max_post_number + 1
else
initial_post_number = moved_posts.first.post_number
end
last_index = 0
posts.each do |post|
while last_index < moved_posts.length && moved_posts[last_index].created_at <= post.created_at
last_index += 1
end
moved_posts.insert(last_index, post)
end
@post_creator = nil
@move_map = {}
@shift_map = {}
@reply_count = {}
next_post_number = initial_post_number
moved_posts.each do |post|
if post.topic_id == destination_topic.id
# avoid shifting to a lower post number
next_post_number = post.post_number if post.post_number > next_post_number
@shift_map[post.post_number] = next_post_number
else
@move_map[post.post_number] = next_post_number
if post.reply_to_post_number.present?
@reply_count[post.reply_to_post_number] = (@reply_count[post.reply_to_post_number] || 0) +
1
end
end
next_post_number += 1
end
moved_posts.reverse_each do |post|
if post.topic_id == destination_topic.id
metadata = movement_metadata(post, new_post_number: @shift_map[post.post_number])
new_post = move_same_topic(post)
else
metadata = movement_metadata(post, new_post_number: @move_map[post.post_number])
new_post = post.is_first_post? ? create_first_post(post) : move(post)
if @move_to_pm && !destination_topic.topic_allowed_users.exists?(user_id: post.user_id)
destination_topic.topic_allowed_users.create!(user_id: post.user_id)
end
end
store_movement(metadata, new_post)
end
# change topic owner if there's a new first post
destination_topic.update_column(:user_id, posts.first.user_id) if initial_post_number == 1
end
def create_first_post(post)
@post_creator =
PostCreator.new(
post.user,
raw: post.raw,
topic_id: destination_topic.id,
acting_user: user,
cook_method: post.cook_method,
via_email: post.via_email,
raw_email: post.raw_email,
skip_validations: true,
created_at: post.created_at,
guardian: Guardian.new(user),
skip_jobs: true,
)
new_post = @post_creator.create!
move_email_logs(post, new_post)
PostAction.copy(post, new_post)
attrs_to_update = { reply_count: @reply_count[1] || 0 }
if new_post.post_number != @move_map[post.post_number]
attrs_to_update[:post_number] = @move_map[post.post_number]
attrs_to_update[:sort_order] = @move_map[post.post_number]
end
new_post.update_columns(attrs_to_update)
new_post.custom_fields = post.custom_fields
new_post.save_custom_fields
DiscourseEvent.trigger(:post_moved, new_post, original_topic.id)
# we don't want to keep the old topic's OP bookmarked when we are
# moving it into a new topic
Bookmark.where(bookmarkable: post).update_all(bookmarkable_id: new_post.id)
new_post
end
def move(post)
update = {
reply_count: @reply_count[post.post_number] || 0,
post_number: @move_map[post.post_number],
reply_to_post_number: @move_map[post.reply_to_post_number],
topic_id: destination_topic.id,
sort_order: @move_map[post.post_number],
baked_version: nil,
}
update[:reply_to_user_id] = nil unless @move_map[post.reply_to_post_number]
post.attributes = update
post.save(validate: false)
DiscourseEvent.trigger(:post_moved, post, original_topic.id)
# Move any links from the post to the new topic
post.topic_links.update_all(topic_id: destination_topic.id)
post
end
def move_same_topic(post)
update = {
post_number: @shift_map[post.post_number],
sort_order: @shift_map[post.post_number],
baked_version: nil,
}
if @shift_map[post.reply_to_post_number]
update[:reply_to_post_number] = @shift_map[post.reply_to_post_number]
end
post.attributes = update
post.save(validate: false)
post
end
def movement_metadata(post, new_post_number: nil)
{
old_topic_id: post.topic_id,
old_post_id: post.id,
old_post_number: post.post_number,
new_topic_id: destination_topic.id,
new_post_number: new_post_number,
new_topic_title: destination_topic.title,
}
end
def store_movement(metadata, new_post)
metadata[:new_post_id] = new_post.id
DB.exec(<<~SQL, metadata)
INSERT INTO moved_posts(old_topic_id, old_post_id, old_post_number, new_topic_id, new_topic_title, new_post_id, new_post_number)
VALUES (:old_topic_id, :old_post_id, :old_post_number, :new_topic_id, :new_topic_title, :new_post_id, :new_post_number)
SQL
end
def move_incoming_emails
DB.exec <<~SQL
UPDATE incoming_emails ie
SET topic_id = mp.new_topic_id,
post_id = mp.new_post_id
FROM moved_posts mp
WHERE ie.topic_id = mp.old_topic_id AND ie.post_id = mp.old_post_id
AND mp.old_topic_id <> mp.new_topic_id
SQL
end
def move_email_logs(old_post, new_post)
EmailLog.where(post_id: old_post.id).update_all(post_id: new_post.id)
end
def move_notifications
DB.exec <<~SQL
UPDATE notifications n
SET topic_id = mp.new_topic_id,
post_number = mp.new_post_number,
data = (data :: JSONB ||
jsonb_strip_nulls(
jsonb_build_object(
'topic_title', CASE WHEN data :: JSONB ->> 'topic_title' IS NULL
THEN NULL
ELSE mp.new_topic_title END
)
)) :: JSON
FROM moved_posts mp
WHERE n.topic_id = mp.old_topic_id AND n.post_number = mp.old_post_number
AND n.notification_type <> #{Notification.types[:watching_first_post]}
SQL
end
def update_reply_counts
DB.exec <<~SQL
UPDATE posts p
SET reply_count = GREATEST(0, reply_count - x.moved_reply_count)
FROM (
SELECT r.post_id, mp.new_topic_id, COUNT(1) AS moved_reply_count
FROM moved_posts mp
JOIN post_replies r ON (mp.old_post_id = r.reply_post_id)
GROUP BY r.post_id, mp.new_topic_id
) x
WHERE x.post_id = p.id AND x.new_topic_id <> p.topic_id
SQL
end
def update_quotes
DB.exec <<~SQL
UPDATE posts p
SET raw = REPLACE(p.raw,
', post:' || mp.old_post_number || ', topic:' || mp.old_topic_id,
', post:' || mp.new_post_number || ', topic:' || mp.new_topic_id),
baked_version = NULL
FROM moved_posts mp, quoted_posts qp
WHERE p.id = qp.post_id AND mp.old_post_id = qp.quoted_post_id
SQL
end
def move_first_post_replies
DB.exec <<~SQL
UPDATE post_replies pr
SET post_id = mp.new_post_id
FROM moved_posts mp
WHERE mp.old_post_id <> mp.new_post_id AND pr.post_id = mp.old_post_id AND
EXISTS (SELECT 1 FROM moved_posts mr WHERE mr.new_post_id = pr.reply_post_id)
SQL
end
def delete_post_replies
DB.exec <<~SQL
DELETE FROM post_replies pr USING moved_posts mp
WHERE (SELECT topic_id FROM posts WHERE id = pr.post_id) <>
(SELECT topic_id FROM posts WHERE id = pr.reply_post_id)
AND (pr.reply_post_id = mp.old_post_id OR pr.post_id = mp.old_post_id)
SQL
end
def copy_shifted_post_timings_to_temp
DB.exec("DROP TABLE IF EXISTS temp_post_timings") if Rails.env.test?
# copy post_timings for shifted posts to a temp table using the new_post_number
# they'll be copied back after delete_invalid_post_timings makes room for them
DB.exec <<~SQL
CREATE TEMPORARY TABLE temp_post_timings ON COMMIT DROP
AS (
SELECT pt.topic_id, mp.new_post_number as post_number, pt.user_id, pt.msecs
FROM post_timings pt
JOIN moved_posts mp
ON mp.old_topic_id = pt.topic_id
AND mp.old_post_number = pt.post_number
AND mp.old_topic_id = mp.new_topic_id
)
SQL
end
def copy_shifted_post_timings_from_temp
DB.exec <<~SQL
INSERT INTO post_timings (topic_id, user_id, post_number, msecs)
SELECT topic_id, user_id, post_number, msecs FROM temp_post_timings
SQL
end
def copy_first_post_timings
DB.exec <<~SQL
INSERT INTO post_timings (topic_id, user_id, post_number, msecs)
SELECT mp.new_topic_id, pt.user_id, mp.new_post_number, pt.msecs
FROM post_timings pt
JOIN moved_posts mp ON (pt.topic_id = mp.old_topic_id AND pt.post_number = mp.old_post_number)
WHERE mp.old_post_id <> mp.new_post_id
ON CONFLICT (topic_id, post_number, user_id) DO UPDATE
SET msecs = GREATEST(post_timings.msecs, excluded.msecs)
SQL
end
def delete_invalid_post_timings
DB.exec <<~SQL
DELETE
FROM post_timings pt
USING moved_posts mp
WHERE pt.topic_id = mp.new_topic_id
AND pt.post_number = mp.new_post_number
SQL
end
def move_post_timings
DB.exec <<~SQL
UPDATE post_timings pt
SET topic_id = mp.new_topic_id,
post_number = mp.new_post_number
FROM moved_posts mp
WHERE pt.topic_id = mp.old_topic_id
AND pt.post_number = mp.old_post_number
AND mp.old_post_id = mp.new_post_id
AND mp.old_topic_id <> mp.new_topic_id
SQL
end
def copy_topic_users
params = {
old_topic_id: original_topic.id,
new_topic_id: destination_topic.id,
old_highest_post_number: destination_topic.highest_post_number,
old_highest_staff_post_number: destination_topic.highest_staff_post_number,
}
DB.exec(<<~SQL, params)
INSERT INTO topic_users(user_id, topic_id, posted, last_read_post_number,
last_emailed_post_number, first_visited_at, last_visited_at, notification_level,
notifications_changed_at, notifications_reason_id)
SELECT tu.user_id,
:new_topic_id AS topic_id,
EXISTS(
SELECT 1
FROM posts p
WHERE p.topic_id = :new_topic_id
AND p.user_id = tu.user_id
LIMIT 1
) AS posted,
(
SELECT MAX(lr.new_post_number)
FROM moved_posts lr
WHERE lr.old_topic_id = tu.topic_id
AND lr.old_post_number <= tu.last_read_post_number
AND lr.old_topic_id <> lr.new_topic_id
) AS last_read_post_number,
(
SELECT MAX(le.new_post_number)
FROM moved_posts le
WHERE le.old_topic_id = tu.topic_id
AND le.old_post_number <= tu.last_emailed_post_number
AND le.old_topic_id <> le.new_topic_id
) AS last_emailed_post_number,
GREATEST(tu.first_visited_at, t.created_at) AS first_visited_at,
GREATEST(tu.last_visited_at, t.created_at) AS last_visited_at,
tu.notification_level,
tu.notifications_changed_at,
tu.notifications_reason_id
FROM topic_users tu
JOIN topics t ON (t.id = :new_topic_id)
WHERE tu.topic_id = :old_topic_id
AND GREATEST(
tu.last_read_post_number,
tu.last_emailed_post_number
) >= (SELECT MIN(mp.old_post_number) FROM moved_posts mp WHERE mp.old_topic_id <> mp.new_topic_id)
ON CONFLICT (topic_id, user_id) DO UPDATE
SET posted = excluded.posted,
last_read_post_number = CASE
WHEN topic_users.last_read_post_number = :old_highest_staff_post_number OR (
:old_highest_post_number < :old_highest_staff_post_number
AND topic_users.last_read_post_number = :old_highest_post_number
AND NOT EXISTS(SELECT 1
FROM users u
WHERE u.id = topic_users.user_id
AND (admin OR moderator))
) THEN
GREATEST(topic_users.last_read_post_number,
excluded.last_read_post_number)
ELSE topic_users.last_read_post_number END,
last_emailed_post_number = CASE
WHEN topic_users.last_emailed_post_number = :old_highest_staff_post_number OR (
:old_highest_post_number < :old_highest_staff_post_number
AND topic_users.last_emailed_post_number = :old_highest_post_number
AND NOT EXISTS(SELECT 1
FROM users u
WHERE u.id = topic_users.user_id
AND (admin OR moderator))
) THEN
GREATEST(topic_users.last_emailed_post_number,
excluded.last_emailed_post_number)
ELSE topic_users.last_emailed_post_number END,
first_visited_at = LEAST(topic_users.first_visited_at, excluded.first_visited_at),
last_visited_at = GREATEST(topic_users.last_visited_at, excluded.last_visited_at)
SQL
end
def update_statistics
destination_topic.update_statistics
original_topic.update_statistics
TopicUser.update_post_action_cache(
topic_id: [original_topic.id, destination_topic.id],
post_id: @post_ids,
)
end
def update_user_actions
UserAction.synchronize_target_topic_ids(posts.map(&:id))
end
def create_moderator_post_in_original_topic
move_type_str = PostMover.move_types[@move_type].to_s
move_type_str.sub!("topic", "message") if @move_to_pm
message =
I18n.with_locale(SiteSetting.default_locale) do
I18n.t(
"move_posts.#{move_type_str}_moderator_post",
count: posts.length,
topic_link:
(
if posts.first.is_first_post?
"[#{destination_topic.title}](#{destination_topic.relative_url})"
else
"[#{destination_topic.title}](#{posts.first.url})"
end
),
)
end
post_type = @move_to_pm ? Post.types[:whisper] : Post.types[:small_action]
original_topic.add_moderator_post(
user,
message,
post_type: post_type,
action_code: "split_topic",
post_number: @first_post_number_moved,
)
end
def posts
@posts ||=
begin
Post
.where(topic: @original_topic, id: post_ids)
.where.not(post_type: Post.types[:small_action])
.where.not(raw: "")
.order(:created_at)
.tap { |posts| raise Discourse::InvalidParameters.new(:post_ids) if posts.empty? }
end
end
def update_last_post_stats
post = destination_topic.ordered_posts.where.not(post_type: Post.types[:whisper]).last
if post && post_ids.include?(post.id)
attrs = {}
attrs[:last_posted_at] = post.created_at
attrs[:last_post_user_id] = post.user_id
attrs[:bumped_at] = Time.now
attrs[:updated_at] = Time.now
destination_topic.update_columns(attrs)
end
end
def update_upload_security_status
DB.after_commit { Jobs.enqueue(:update_topic_upload_security, topic_id: @destination_topic.id) }
end
def update_bookmarks
DB.after_commit do
Jobs.enqueue(:sync_topic_user_bookmarked, topic_id: @original_topic.id)
Jobs.enqueue(:sync_topic_user_bookmarked, topic_id: @destination_topic.id)
end
end
def watch_new_topic
if @destination_topic.archetype == Archetype.private_message
if @original_topic.archetype == Archetype.private_message
notification_levels =
TopicUser
.where(topic_id: @original_topic.id, user_id: posts.pluck(:user_id))
.pluck(:user_id, :notification_level)
.to_h
else
notification_levels =
posts
.pluck(:user_id)
.uniq
.map { |user_id| [user_id, TopicUser.notification_levels[:watching]] }
.to_h
end
else
notification_levels = [[@destination_topic.user_id, TopicUser.notification_levels[:watching]]]
end
notification_levels.each do |user_id, notification_level|
TopicUser.change(
user_id,
@destination_topic.id,
notification_level: notification_level,
notifications_reason_id:
TopicUser.notification_reasons[
destination_topic.user_id == user_id ? :created_topic : :created_post
],
)
end
end
def add_allowed_users(usernames)
return unless usernames.present?
names = usernames.split(",").flatten
User
.where(username: names)
.find_each do |user|
unless destination_topic.topic_allowed_users.where(user_id: user.id).exists?
destination_topic.topic_allowed_users.build(user_id: user.id)
end
end
destination_topic.save!
end
def enqueue_jobs(topic)
@post_creator.enqueue_jobs if @post_creator
Jobs.enqueue(:notify_moved_posts, post_ids: post_ids, moved_by_id: user.id)
Jobs.enqueue(:delete_inaccessible_notifications, topic_id: topic.id)
end
def close_topic_and_schedule_deletion
@original_topic.update_status("closed", true, @user)
days_to_deleting = SiteSetting.delete_merged_stub_topics_after_days
if days_to_deleting > 0
@original_topic.set_or_create_timer(
TopicTimer.types[:delete],
days_to_deleting * 24,
by_user: @user,
)
end
end
end