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discourse/app/models/topic.rb

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require_dependency 'slug'
require_dependency 'avatar_lookup'
require_dependency 'topic_view'
require_dependency 'rate_limiter'
require_dependency 'text_sentinel'
require_dependency 'text_cleaner'
require_dependency 'archetype'
require_dependency 'html_prettify'
require_dependency 'discourse_tagging'
require_dependency 'search_indexer'
require_dependency 'list_controller'
require_dependency 'topic_posters_summary'
require_dependency 'topic_featured_users'
class Topic < ActiveRecord::Base
class UserExists < StandardError; end
include ActionView::Helpers::SanitizeHelper
include RateLimiter::OnCreateRecord
include HasCustomFields
include Trashable
include Searchable
include LimitedEdit
extend Forwardable
def_delegator :featured_users, :user_ids, :featured_user_ids
def_delegator :featured_users, :choose, :feature_topic_users
def_delegator :notifier, :watch!, :notify_watch!
def_delegator :notifier, :track!, :notify_tracking!
def_delegator :notifier, :regular!, :notify_regular!
def_delegator :notifier, :mute!, :notify_muted!
def_delegator :notifier, :toggle_mute, :toggle_mute
attr_accessor :allowed_user_ids, :tags_changed, :includes_destination_category
DiscourseEvent.on(:site_setting_saved) do |site_setting|
if site_setting.name.to_s == "slug_generation_method" && site_setting.saved_change_to_value?
Scheduler::Defer.later("Null topic slug") do
Topic.update_all(slug: nil)
end
end
end
def self.max_fancy_title_length
400
end
def featured_users
@featured_users ||= TopicFeaturedUsers.new(self)
end
def trash!(trashed_by = nil)
if deleted_at.nil?
update_category_topic_count_by(-1)
CategoryTagStat.topic_deleted(self) if self.tags.present?
end
super(trashed_by)
update_flagged_posts_count
self.topic_embed.trash! if has_topic_embed?
end
def recover!
unless deleted_at.nil?
update_category_topic_count_by(1)
CategoryTagStat.topic_recovered(self) if self.tags.present?
end
super
update_flagged_posts_count
unless (topic_embed = TopicEmbed.with_deleted.find_by_topic_id(id)).nil?
topic_embed.recover!
end
end
rate_limit :default_rate_limiter
rate_limit :limit_topics_per_day
rate_limit :limit_private_messages_per_day
validates :title, if: Proc.new { |t| t.new_record? || t.title_changed? },
presence: true,
topic_title_length: true,
censored_words: true,
quality_title: { unless: :private_message? },
max_emojis: true,
unique_among: { unless: Proc.new { |t| (SiteSetting.allow_duplicate_topic_titles? || t.private_message?) },
message: :has_already_been_used,
allow_blank: true,
case_sensitive: false,
collection: Proc.new { Topic.listable_topics } }
validates :category_id,
presence: true,
exclusion: {
in: Proc.new { [SiteSetting.uncategorized_category_id] }
},
if: Proc.new { |t|
(t.new_record? || t.category_id_changed?) &&
!SiteSetting.allow_uncategorized_topics &&
(t.archetype.nil? || t.regular?)
}
validates :featured_link, allow_nil: true, url: true
validate if: :featured_link do
errors.add(:featured_link, :invalid_category) unless !featured_link_changed? ||
Guardian.new.can_edit_featured_link?(category_id)
end
before_validation do
self.title = TextCleaner.clean_title(TextSentinel.title_sentinel(title).text) if errors[:title].empty?
self.featured_link = self.featured_link.strip.presence if self.featured_link
end
belongs_to :category
has_many :category_users, through: :category
has_many :posts
has_many :ordered_posts, -> { order(post_number: :asc) }, class_name: "Post"
has_many :topic_allowed_users
has_many :topic_allowed_groups
has_many :group_archived_messages, dependent: :destroy
has_many :user_archived_messages, dependent: :destroy
has_many :allowed_groups, through: :topic_allowed_groups, source: :group
has_many :allowed_group_users, through: :allowed_groups, source: :users
has_many :allowed_users, through: :topic_allowed_users, source: :user
has_many :queued_posts
has_many :topic_tags
has_many :tags, through: :topic_tags, dependent: :destroy # dependent destroy applies to the topic_tags records
has_many :tag_users, through: :tags
has_one :top_topic
has_one :shared_draft, dependent: :destroy
belongs_to :user
belongs_to :last_poster, class_name: 'User', foreign_key: :last_post_user_id
belongs_to :featured_user1, class_name: 'User', foreign_key: :featured_user1_id
belongs_to :featured_user2, class_name: 'User', foreign_key: :featured_user2_id
belongs_to :featured_user3, class_name: 'User', foreign_key: :featured_user3_id
belongs_to :featured_user4, class_name: 'User', foreign_key: :featured_user4_id
has_many :topic_users
has_many :topic_links
has_many :topic_invites
has_many :invites, through: :topic_invites, source: :invite
has_many :topic_timers, dependent: :destroy
has_one :user_warning
has_one :first_post, -> { where post_number: 1 }, class_name: 'Post'
has_one :topic_search_data
has_one :topic_embed, dependent: :destroy
# When we want to temporarily attach some data to a forum topic (usually before serialization)
attr_accessor :user_data
attr_accessor :posters # TODO: can replace with posters_summary once we remove old list code
attr_accessor :participants
attr_accessor :topic_list
attr_accessor :meta_data
attr_accessor :include_last_poster
attr_accessor :import_mode # set to true to optimize creation and save for imports
# The regular order
scope :topic_list_order, -> { order('topics.bumped_at desc') }
# Return private message topics
scope :private_messages, -> { where(archetype: Archetype.private_message) }
scope :listable_topics, -> { where('topics.archetype <> ?', Archetype.private_message) }
scope :by_newest, -> { order('topics.created_at desc, topics.id desc') }
scope :visible, -> { where(visible: true) }
scope :created_since, lambda { |time_ago| where('topics.created_at > ?', time_ago) }
scope :secured, lambda { |guardian = nil|
ids = guardian.secure_category_ids if guardian
# Query conditions
condition = if ids.present?
["NOT read_restricted OR id IN (:cats)", cats: ids]
else
["NOT read_restricted"]
end
where("topics.category_id IS NULL OR topics.category_id IN (SELECT id FROM categories WHERE #{condition[0]})", condition[1])
}
IN_CATEGORY_AND_SUBCATEGORIES_SQL = <<~SQL
t.category_id = :category_id
OR t.category_id IN (SELECT id FROM categories WHERE categories.parent_category_id = :category_id)
SQL
scope :in_category_and_subcategories, lambda { |category_id|
where("topics.category_id = ? OR topics.category_id IN (SELECT id FROM categories WHERE categories.parent_category_id = ?)",
category_id,
category_id) if category_id
}
scope :with_subtype, ->(subtype) { where('topics.subtype = ?', subtype) }
attr_accessor :ignore_category_auto_close
attr_accessor :skip_callbacks
before_create do
initialize_default_values
end
after_create do
unless skip_callbacks
changed_to_category(category)
advance_draft_sequence
end
end
before_save do
unless skip_callbacks
ensure_topic_has_a_category
end
if title_changed?
write_attribute(:fancy_title, Topic.fancy_title(title))
end
if category_id_changed? || new_record?
inherit_auto_close_from_category
end
end
after_save do
banner = "banner".freeze
if archetype_before_last_save == banner || archetype == banner
ApplicationController.banner_json_cache.clear
end
if tags_changed || saved_change_to_attribute?(:category_id)
SearchIndexer.queue_post_reindex(self.id)
if tags_changed
TagUser.auto_watch(topic_id: id)
TagUser.auto_track(topic_id: id)
self.tags_changed = false
end
end
SearchIndexer.index(self)
UserActionCreator.log_topic(self)
end
after_update do
if saved_changes[:category_id] && self.tags.present?
CategoryTagStat.topic_moved(self, *saved_changes[:category_id])
end
end
def initialize_default_values
self.bumped_at ||= Time.now
self.last_post_user_id ||= user_id
end
def inherit_auto_close_from_category
if !self.closed &&
!@ignore_category_auto_close &&
self.category &&
self.category.auto_close_hours &&
!public_topic_timer&.execute_at
self.set_or_create_timer(
TopicTimer.types[:close],
self.category.auto_close_hours,
based_on_last_post: self.category.auto_close_based_on_last_post
)
end
end
def advance_draft_sequence
if self.private_message?
DraftSequence.next!(user, Draft::NEW_PRIVATE_MESSAGE)
else
DraftSequence.next!(user, Draft::NEW_TOPIC)
end
end
def ensure_topic_has_a_category
if category_id.nil? && (archetype.nil? || self.regular?)
self.category_id = category&.id || SiteSetting.uncategorized_category_id
end
end
def self.visible_post_types(viewed_by = nil)
types = Post.types
result = [types[:regular], types[:moderator_action], types[:small_action]]
result << types[:whisper] if viewed_by&.staff?
result
end
def self.top_viewed(max = 10)
Topic.listable_topics.visible.secured.order('views desc').limit(max)
end
def self.recent(max = 10)
Topic.listable_topics.visible.secured.order('created_at desc').limit(max)
end
def self.count_exceeds_minimum?
count > SiteSetting.minimum_topics_similar
end
def best_post
posts.where(post_type: Post.types[:regular], user_deleted: false).order('score desc nulls last').limit(1).first
end
def has_flags?
FlagQuery.flagged_post_actions(filter: "active")
.where("topics.id" => id)
.exists?
end
def is_official_warning?
subtype == TopicSubtype.moderator_warning
end
# all users (in groups or directly targetted) that are going to get the pm
def all_allowed_users
moderators_sql = " UNION #{User.moderators.to_sql}" if private_message? && (has_flags? || is_official_warning?)
User.from("(#{allowed_users.to_sql} UNION #{allowed_group_users.to_sql}#{moderators_sql}) as users")
end
# Additional rate limits on topics: per day and private messages per day
def limit_topics_per_day
if user && user.new_user_posting_on_first_day?
limit_first_day_topics_per_day
else
apply_per_day_rate_limit_for("topics", :max_topics_per_day)
end
end
def limit_private_messages_per_day
return unless private_message?
apply_per_day_rate_limit_for("pms", :max_personal_messages_per_day)
end
def self.fancy_title(title)
return unless escaped = ERB::Util.html_escape(title)
fancy_title = Emoji.unicode_unescape(HtmlPrettify.render(escaped))
fancy_title.length > Topic.max_fancy_title_length ? escaped : fancy_title
end
def fancy_title
return ERB::Util.html_escape(title) unless SiteSetting.title_fancy_entities?
unless fancy_title = read_attribute(:fancy_title)
fancy_title = Topic.fancy_title(title)
write_attribute(:fancy_title, fancy_title)
if !new_record? && !Discourse.readonly_mode?
# make sure data is set in table, this also allows us to change algorithm
# by simply nulling this column
DB.exec("UPDATE topics SET fancy_title = :fancy_title where id = :id", id: self.id, fancy_title: fancy_title)
end
end
fancy_title
end
def pending_posts_count
queued_posts.new_count
end
# Returns hot topics since a date for display in email digest.
def self.for_digest(user, since, opts = nil)
opts = opts || {}
score = "#{ListController.best_period_for(since)}_score"
topics = Topic
.visible
.secured(Guardian.new(user))
.joins("LEFT OUTER JOIN topic_users ON topic_users.topic_id = topics.id AND topic_users.user_id = #{user.id.to_i}")
.joins("LEFT OUTER JOIN category_users ON category_users.category_id = topics.category_id AND category_users.user_id = #{user.id.to_i}")
.joins("LEFT OUTER JOIN users ON users.id = topics.user_id")
.where(closed: false, archived: false)
.where("COALESCE(topic_users.notification_level, 1) <> ?", TopicUser.notification_levels[:muted])
.created_since(since)
.where('topics.created_at < ?', (SiteSetting.editing_grace_period || 0).seconds.ago)
.listable_topics
.includes(:category)
unless opts[:include_tl0] || user.user_option.try(:include_tl0_in_digests)
topics = topics.where("COALESCE(users.trust_level, 0) > 0")
end
if !!opts[:top_order]
topics = topics.joins("LEFT OUTER JOIN top_topics ON top_topics.topic_id = topics.id")
.order(TopicQuerySQL.order_top_with_notification_levels(score))
end
if opts[:limit]
topics = topics.limit(opts[:limit])
end
# Remove category topics
category_topic_ids = Category.pluck(:topic_id).compact!
if category_topic_ids.present?
topics = topics.where("topics.id NOT IN (?)", category_topic_ids)
end
# Remove muted categories
muted_category_ids = CategoryUser.where(user_id: user.id, notification_level: CategoryUser.notification_levels[:muted]).pluck(:category_id)
if SiteSetting.digest_suppress_categories.present?
muted_category_ids += SiteSetting.digest_suppress_categories.split("|").map(&:to_i)
muted_category_ids = muted_category_ids.uniq
end
if muted_category_ids.present?
topics = topics.where("topics.category_id NOT IN (?)", muted_category_ids)
end
# Remove muted tags
muted_tag_ids = TagUser.lookup(user, :muted).pluck(:tag_id)
unless muted_tag_ids.empty?
# If multiple tags per topic, include topics with tags that aren't muted,
# and don't forget untagged topics.
topics = topics.where(
"EXISTS ( SELECT 1 FROM topic_tags WHERE topic_tags.topic_id = topics.id AND tag_id NOT IN (?) )
OR NOT EXISTS (SELECT 1 FROM topic_tags WHERE topic_tags.topic_id = topics.id)", muted_tag_ids)
end
topics
end
# Using the digest query, figure out what's new for a user since last seen
def self.new_since_last_seen(user, since, featured_topic_ids = nil)
topics = Topic.for_digest(user, since)
featured_topic_ids ? topics.where("topics.id NOT IN (?)", featured_topic_ids) : topics
end
def meta_data=(data)
custom_fields.replace(data)
end
def meta_data
custom_fields
end
def update_meta_data(data)
custom_fields.update(data)
save
end
def reload(options = nil)
@post_numbers = nil
@public_topic_timer = nil
@private_topic_timer = nil
@is_category_topic = nil
super(options)
end
def post_numbers
@post_numbers ||= posts.order(:post_number).pluck(:post_number)
end
def age_in_minutes
((Time.zone.now - created_at) / 1.minute).round
end
def self.listable_count_per_day(start_date, end_date, category_id = nil)
result = listable_topics.where("topics.created_at >= ? AND topics.created_at <= ?", start_date, end_date)
result = result.group('date(topics.created_at)').order('date(topics.created_at)')
result = result.where(category_id: category_id) if category_id
result.count
end
def private_message?
archetype == Archetype.private_message
end
def regular?
self.archetype == Archetype.default
end
MAX_SIMILAR_BODY_LENGTH ||= 200
def self.similar_to(title, raw, user = nil)
return [] if title.blank?
raw = raw.presence || ""
search_data = "#{title} #{raw[0...MAX_SIMILAR_BODY_LENGTH]}".strip
filter_words = Search.prepare_data(search_data)
ts_query = Search.ts_query(term: filter_words, joiner: "|")
candidates = Topic
.visible
.listable_topics
.secured(Guardian.new(user))
.joins("JOIN topic_search_data s ON topics.id = s.topic_id")
.joins("LEFT JOIN categories c ON topics.id = c.topic_id")
.where("search_data @@ #{ts_query}")
.where("c.topic_id IS NULL")
.order("ts_rank(search_data, #{ts_query}) DESC")
.limit(SiteSetting.max_similar_results * 3)
candidate_ids = candidates.pluck(:id)
return [] if candidate_ids.blank?
similars = Topic
.joins("JOIN posts AS p ON p.topic_id = topics.id AND p.post_number = 1")
.where("topics.id IN (?)", candidate_ids)
.order("similarity DESC")
.limit(SiteSetting.max_similar_results)
if raw.present?
similars
.select(sanitize_sql_array(["topics.*, similarity(topics.title, :title) + similarity(p.raw, :raw) AS similarity, p.cooked AS blurb", title: title, raw: raw]))
.where("similarity(topics.title, :title) + similarity(p.raw, :raw) > 0.2", title: title, raw: raw)
else
similars
.select(sanitize_sql_array(["topics.*, similarity(topics.title, :title) AS similarity, p.cooked AS blurb", title: title]))
.where("similarity(topics.title, :title) > 0.2", title: title)
end
end
def update_status(status, enabled, user, opts = {})
TopicStatusUpdater.new(self, user).update!(status, enabled, opts)
DiscourseEvent.trigger(:topic_status_updated, self, status, enabled)
end
# Atomically creates the next post number
def self.next_post_number(topic_id, opts = {})
highest = DB.query_single("SELECT coalesce(max(post_number),0) AS max FROM posts WHERE topic_id = ?", topic_id).first.to_i
if opts[:whisper]
result = DB.query_single(<<~SQL, highest, topic_id)
UPDATE topics
SET highest_staff_post_number = ? + 1
WHERE id = ?
RETURNING highest_staff_post_number
SQL
result.first.to_i
else
reply_sql = opts[:reply] ? ", reply_count = reply_count + 1" : ""
posts_sql = opts[:post] ? ", posts_count = posts_count + 1" : ""
result = DB.query_single(<<~SQL, highest: highest, topic_id: topic_id)
UPDATE topics
SET highest_staff_post_number = :highest + 1,
highest_post_number = :highest + 1
#{reply_sql}
#{posts_sql}
WHERE id = :topic_id
RETURNING highest_post_number
SQL
result.first.to_i
end
end
def self.reset_all_highest!
DB.exec <<~SQL
WITH
X as (
SELECT topic_id,
COALESCE(MAX(post_number), 0) highest_post_number
FROM posts
WHERE deleted_at IS NULL
GROUP BY topic_id
),
Y as (
SELECT topic_id,
coalesce(MAX(post_number), 0) highest_post_number,
count(*) posts_count,
max(created_at) last_posted_at
FROM posts
WHERE deleted_at IS NULL AND post_type <> 4
GROUP BY topic_id
)
UPDATE topics
SET
highest_staff_post_number = X.highest_post_number,
highest_post_number = Y.highest_post_number,
last_posted_at = Y.last_posted_at,
posts_count = Y.posts_count
FROM X, Y
WHERE
topics.archetype <> 'private_message' AND
X.topic_id = topics.id AND
Y.topic_id = topics.id AND (
topics.highest_staff_post_number <> X.highest_post_number OR
topics.highest_post_number <> Y.highest_post_number OR
topics.last_posted_at <> Y.last_posted_at OR
topics.posts_count <> Y.posts_count
)
SQL
DB.exec <<~SQL
WITH
X as (
SELECT topic_id,
COALESCE(MAX(post_number), 0) highest_post_number
FROM posts
WHERE deleted_at IS NULL
GROUP BY topic_id
),
Y as (
SELECT topic_id,
coalesce(MAX(post_number), 0) highest_post_number,
count(*) posts_count,
max(created_at) last_posted_at
FROM posts
WHERE deleted_at IS NULL AND post_type <> 3 AND post_type <> 4
GROUP BY topic_id
)
UPDATE topics
SET
highest_staff_post_number = X.highest_post_number,
highest_post_number = Y.highest_post_number,
last_posted_at = Y.last_posted_at,
posts_count = Y.posts_count
FROM X, Y
WHERE
topics.archetype = 'private_message' AND
X.topic_id = topics.id AND
Y.topic_id = topics.id AND (
topics.highest_staff_post_number <> X.highest_post_number OR
topics.highest_post_number <> Y.highest_post_number OR
topics.last_posted_at <> Y.last_posted_at OR
topics.posts_count <> Y.posts_count
)
SQL
end
# If a post is deleted we have to update our highest post counters
def self.reset_highest(topic_id)
archetype = Topic.where(id: topic_id).pluck(:archetype).first
# ignore small_action replies for private messages
post_type = archetype == Archetype.private_message ? " AND post_type <> #{Post.types[:small_action]}" : ''
result = DB.query_single(<<~SQL, topic_id: topic_id)
UPDATE topics
SET
highest_staff_post_number = (
SELECT COALESCE(MAX(post_number), 0) FROM posts
WHERE topic_id = :topic_id AND
deleted_at IS NULL
),
highest_post_number = (
SELECT COALESCE(MAX(post_number), 0) FROM posts
WHERE topic_id = :topic_id AND
deleted_at IS NULL AND
post_type <> 4
#{post_type}
),
posts_count = (
SELECT count(*) FROM posts
WHERE deleted_at IS NULL AND
topic_id = :topic_id AND
post_type <> 4
#{post_type}
),
last_posted_at = (
SELECT MAX(created_at) FROM posts
WHERE topic_id = :topic_id AND
deleted_at IS NULL AND
post_type <> 4
#{post_type}
)
WHERE id = :topic_id
RETURNING highest_post_number
SQL
highest_post_number = result.first.to_i
# Update the forum topic user records
DB.exec(<<~SQL, highest: highest_post_number, topic_id: topic_id)
UPDATE topic_users
SET last_read_post_number = CASE
WHEN last_read_post_number > :highest THEN :highest
ELSE last_read_post_number
END,
highest_seen_post_number = CASE
WHEN highest_seen_post_number > :highest THEN :highest
ELSE highest_seen_post_number
END
WHERE topic_id = :topic_id
SQL
end
# This calculates the geometric mean of the posts and stores it with the topic
def self.calculate_avg_time(min_topic_age = nil)
builder = DB.build <<~SQL
UPDATE topics
SET avg_time = x.gmean
FROM (SELECT topic_id,
round(exp(avg(ln(avg_time)))) AS gmean
FROM posts
WHERE avg_time > 0 AND avg_time IS NOT NULL
GROUP BY topic_id) AS x
/*where*/
SQL
builder.where <<~SQL
x.topic_id = topics.id AND
(topics.avg_time <> x.gmean OR topics.avg_time IS NULL)
SQL
if min_topic_age
builder.where("topics.bumped_at > :bumped_at", bumped_at: min_topic_age)
end
builder.exec
end
def changed_to_category(new_category)
return true if new_category.blank? || Category.exists?(topic_id: id)
return false if new_category.id == SiteSetting.uncategorized_category_id && !SiteSetting.allow_uncategorized_topics
Topic.transaction do
old_category = category
if self.category_id != new_category.id
self.update_attribute(:category_id, new_category.id)
if old_category
Category
.where(id: old_category.id)
.update_all("topic_count = topic_count - 1")
end
# when a topic changes category we may have to start watching it
# if we happen to have read state for it
CategoryUser.auto_watch(category_id: new_category.id, topic_id: self.id)
CategoryUser.auto_track(category_id: new_category.id, topic_id: self.id)
if post = self.ordered_posts.first
notified_user_ids = [post.user_id, post.last_editor_id].uniq
DB.after_commit do
Jobs.enqueue(:notify_category_change, post_id: post.id, notified_user_ids: notified_user_ids)
end
end
end
Category.where(id: new_category.id).update_all("topic_count = topic_count + 1")
CategoryFeaturedTopic.feature_topics_for(old_category) unless @import_mode
CategoryFeaturedTopic.feature_topics_for(new_category) unless @import_mode || old_category.try(:id) == new_category.id
end
true
end
def add_small_action(user, action_code, who = nil, opts = {})
custom_fields = {}
custom_fields["action_code_who"] = who if who.present?
opts = opts.merge(
post_type: Post.types[:small_action],
action_code: action_code,
custom_fields: custom_fields
)
add_moderator_post(user, nil, opts)
end
def add_moderator_post(user, text, opts = nil)
opts ||= {}
new_post = nil
creator = PostCreator.new(user,
raw: text,
post_type: opts[:post_type] || Post.types[:moderator_action],
action_code: opts[:action_code],
no_bump: opts[:bump].blank?,
topic_id: self.id,
skip_validations: true,
custom_fields: opts[:custom_fields])
if (new_post = creator.create) && new_post.present?
increment!(:moderator_posts_count) if new_post.persisted?
# If we are moving posts, we want to insert the moderator post where the previous posts were
# in the stream, not at the end.
new_post.update_attributes!(post_number: opts[:post_number], sort_order: opts[:post_number]) if opts[:post_number].present?
# Grab any links that are present
TopicLink.extract_from(new_post)
QuotedPost.extract_from(new_post)
end
new_post
end
def change_category_to_id(category_id)
return false if private_message?
new_category_id = category_id.to_i
# if the category name is blank, reset the attribute
new_category_id = SiteSetting.uncategorized_category_id if new_category_id == 0
return true if self.category_id == new_category_id
cat = Category.find_by(id: new_category_id)
return false unless cat
changed_to_category(cat)
end
def remove_allowed_group(removed_by, name)
if group = Group.find_by(name: name)
group_user = topic_allowed_groups.find_by(group_id: group.id)
if group_user
group_user.destroy
add_small_action(removed_by, "removed_group", group.name)
return true
end
end
false
end
def remove_allowed_user(removed_by, username)
user = username.is_a?(User) ? username : User.find_by(username: username)
if user
topic_user = topic_allowed_users.find_by(user_id: user.id)
if topic_user
topic_user.destroy
if user.id == removed_by&.id
removed_by = Discourse.system_user
add_small_action(removed_by, "user_left", user.username)
else
add_small_action(removed_by, "removed_user", user.username)
end
return true
end
end
false
end
def reached_recipients_limit?
return false unless private_message?
topic_allowed_users.count + topic_allowed_groups.count >= SiteSetting.max_allowed_message_recipients
end
def invite_group(user, group)
TopicAllowedGroup.create!(topic_id: id, group_id: group.id)
last_post = posts.order('post_number desc').where('not hidden AND posts.deleted_at IS NULL').first
if last_post
Jobs.enqueue(:post_alert, post_id: last_post.id)
add_small_action(user, "invited_group", group.name)
group_id = group.id
group.users.where(
"group_users.notification_level > ? AND user_id != ?",
NotificationLevels.all[:muted], user.id
).find_each do |u|
u.notifications.create!(
notification_type: Notification.types[:invited_to_private_message],
topic_id: self.id,
post_number: 1,
data: {
topic_title: self.title,
display_username: user.username,
group_id: group_id
}.to_json
)
end
end
true
end
def invite(invited_by, username_or_email, group_ids = nil, custom_message = nil)
target_user = User.find_by_username_or_email(username_or_email)
guardian = Guardian.new(invited_by)
is_email = username_or_email =~ /^.+@.+$/
if target_user
if topic_allowed_users.exists?(user_id: target_user.id)
raise UserExists.new(I18n.t("topic_invite.user_exists"))
end
if invite_existing_muted?(target_user, invited_by)
return true
end
if private_message?
!!invite_to_private_message(invited_by, target_user, guardian)
else
!!invite_to_topic(invited_by, target_user, group_ids, guardian)
end
elsif is_email && guardian.can_invite_via_email?(self)
!!Invite.invite_by_email(
username_or_email, invited_by, self, group_ids, custom_message
)
end
end
def invite_existing_muted?(target_user, invited_by)
if invited_by.id &&
MutedUser.where(user_id: target_user.id, muted_user_id: invited_by.id)
.joins(:muted_user)
.where('NOT admin AND NOT moderator')
.exists?
return true
end
if TopicUser.where(
topic: self,
user: target_user,
notification_level: TopicUser.notification_levels[:muted]
).exists?
return true
end
false
end
def email_already_exists_for?(invite)
invite.email_already_exists && private_message?
end
def grant_permission_to_user(lower_email)
user = User.find_by_email(lower_email)
topic_allowed_users.create!(user_id: user.id)
end
def max_post_number
posts.with_deleted.maximum(:post_number).to_i
end
def move_posts(moved_by, post_ids, opts)
post_mover = PostMover.new(self, moved_by, post_ids, move_to_pm: opts[:archetype].present? && opts[:archetype] == "private_message")
if opts[:destination_topic_id]
topic = post_mover.to_topic(opts[:destination_topic_id], participants: opts[:participants])
DiscourseEvent.trigger(:topic_merged,
post_mover.original_topic,
post_mover.destination_topic
)
topic
elsif opts[:title]
post_mover.to_new_topic(opts[:title], opts[:category_id], opts[:tags])
end
end
# Updates the denormalized statistics of a topic including featured posters. They shouldn't
# go out of sync unless you do something drastic live move posts from one topic to another.
# this recalculates everything.
def update_statistics
feature_topic_users
update_action_counts
Topic.reset_highest(id)
end
def update_flagged_posts_count
PostAction.update_flagged_posts_count
end
def update_action_counts
update_column(:like_count, Post.where(topic_id: id).sum(:like_count))
end
def posters_summary(options = {}) # avatar lookup in options
@posters_summary ||= TopicPostersSummary.new(self, options).summary
end
def participants_summary(options = {})
@participants_summary ||= TopicParticipantsSummary.new(self, options).summary
end
def make_banner!(user)
# only one banner at the same time
previous_banner = Topic.where(archetype: Archetype.banner).first
previous_banner.remove_banner!(user) if previous_banner.present?
UserProfile.where("dismissed_banner_key IS NOT NULL")
.update_all(dismissed_banner_key: nil)
self.archetype = Archetype.banner
self.add_small_action(user, "banner.enabled")
self.save
MessageBus.publish('/site/banner', banner)
end
def remove_banner!(user)
self.archetype = Archetype.default
self.add_small_action(user, "banner.disabled")
self.save
MessageBus.publish('/site/banner', nil)
end
def banner
post = self.ordered_posts.first
{
html: post.cooked,
key: self.id,
url: self.url
}
end
# Even if the slug column in the database is null, topic.slug will return something:
def slug
unless slug = read_attribute(:slug)
return '' unless title.present?
slug = Slug.for(title)
if new_record?
write_attribute(:slug, slug)
else
update_column(:slug, slug)
end
end
slug
end
def title=(t)
slug = Slug.for(t.to_s)
write_attribute(:slug, slug)
write_attribute(:fancy_title, nil)
write_attribute(:title, t)
end
# NOTE: These are probably better off somewhere else.
# Having a model know about URLs seems a bit strange.
def last_post_url
"#{Discourse.base_uri}/t/#{slug}/#{id}/#{posts_count}"
end
def self.url(id, slug, post_number = nil)
url = "#{Discourse.base_url}/t/#{slug}/#{id}"
url << "/#{post_number}" if post_number.to_i > 1
url
end
def url(post_number = nil)
self.class.url id, slug, post_number
end
def self.relative_url(id, slug, post_number = nil)
url = "#{Discourse.base_uri}/t/"
url << "#{slug}/" if slug.present?
url << id.to_s
url << "/#{post_number}" if post_number.to_i > 1
url
end
def slugless_url(post_number = nil)
Topic.relative_url(id, nil, post_number)
end
def relative_url(post_number = nil)
Topic.relative_url(id, slug, post_number)
end
def clear_pin_for(user)
return unless user.present?
TopicUser.change(user.id, id, cleared_pinned_at: Time.now)
end
def re_pin_for(user)
return unless user.present?
TopicUser.change(user.id, id, cleared_pinned_at: nil)
end
def update_pinned(status, global = false, pinned_until = "")
pinned_until ||= ''
pinned_until = begin
Time.parse(pinned_until)
rescue ArgumentError
end
update_columns(
pinned_at: status ? Time.zone.now : nil,
pinned_globally: global,
pinned_until: pinned_until
)
Jobs.cancel_scheduled_job(:unpin_topic, topic_id: self.id)
Jobs.enqueue_at(pinned_until, :unpin_topic, topic_id: self.id) if pinned_until
end
def draft_key
"#{Draft::EXISTING_TOPIC}#{id}"
end
def notifier
@topic_notifier ||= TopicNotifier.new(self)
end
def muted?(user)
if user && user.id
notifier.muted?(user.id)
end
end
def self.ensure_consistency!
# unpin topics that might have been missed
Topic.where("pinned_until < now()").update_all(pinned_at: nil, pinned_globally: false, pinned_until: nil)
end
def public_topic_timer
@public_topic_timer ||= topic_timers.find_by(deleted_at: nil, public_type: true)
end
def private_topic_timer(user)
@private_topic_Timer ||= topic_timers.find_by(deleted_at: nil, public_type: false, user_id: user.id)
end
def delete_topic_timer(status_type, by_user: Discourse.system_user)
options = { status_type: status_type }
options.merge!(user: by_user) unless TopicTimer.public_types[status_type]
self.topic_timers.find_by(options)&.trash!(by_user)
nil
end
# Valid arguments for the time:
# * An integer, which is the number of hours from now to update the topic's status.
# * A timestamp, like "2013-11-25 13:00", when the topic's status should update.
# * A timestamp with timezone in JSON format. (e.g., "2013-11-26T21:00:00.000Z")
# * `nil` to delete the topic's status update.
# Options:
# * by_user: User who is setting the topic's status update.
# * based_on_last_post: True if time should be based on timestamp of the last post.
# * category_id: Category that the update will apply to.
def set_or_create_timer(status_type, time, by_user: nil, based_on_last_post: false, category_id: SiteSetting.uncategorized_category_id)
return delete_topic_timer(status_type, by_user: by_user) if time.blank?
public_topic_timer = !!TopicTimer.public_types[status_type]
topic_timer_options = { topic: self, public_type: public_topic_timer }
topic_timer_options.merge!(user: by_user) unless public_topic_timer
topic_timer = TopicTimer.find_or_initialize_by(topic_timer_options)
topic_timer.status_type = status_type
time_now = Time.zone.now
topic_timer.based_on_last_post = !based_on_last_post.blank?
if status_type == TopicTimer.types[:publish_to_category]
topic_timer.category = Category.find_by(id: category_id)
end
if topic_timer.based_on_last_post
num_hours = time.to_f
if num_hours > 0
last_post_created_at = self.ordered_posts.last.present? ? self.ordered_posts.last.created_at : time_now
topic_timer.execute_at = last_post_created_at + num_hours.hours
topic_timer.created_at = last_post_created_at
end
else
utc = Time.find_zone("UTC")
is_float = (Float(time) rescue nil)
if is_float
num_hours = time.to_f
topic_timer.execute_at = num_hours.hours.from_now if num_hours > 0
else
timestamp = utc.parse(time)
raise Discourse::InvalidParameters unless timestamp
# a timestamp in client's time zone, like "2015-5-27 12:00"
topic_timer.execute_at = timestamp
topic_timer.errors.add(:execute_at, :invalid) if timestamp < utc.now
end
end
if topic_timer.execute_at
if by_user&.staff? || by_user&.trust_level == TrustLevel[4]
topic_timer.user = by_user
else
topic_timer.user ||= (self.user.staff? || self.user.trust_level == TrustLevel[4] ? self.user : Discourse.system_user)
end
if self.persisted?
topic_timer.save!
else
self.topic_timers << topic_timer
end
topic_timer
end
end
def read_restricted_category?
category && category.read_restricted
end
def acting_user
@acting_user || user
end
def acting_user=(u)
@acting_user = u
end
def secure_group_ids
@secure_group_ids ||= if self.category && self.category.read_restricted?
self.category.secure_group_ids
end
end
def has_topic_embed?
TopicEmbed.where(topic_id: id).exists?
end
def expandable_first_post?
SiteSetting.embed_truncate? && has_topic_embed?
end
def message_archived?(user)
return false unless user && user.id
# tricky query but this checks to see if message is archived for ALL groups you belong to
# OR if you have it archived as a user explicitly
sql = <<~SQL
SELECT 1
WHERE
(
SELECT count(*) FROM topic_allowed_groups tg
JOIN group_archived_messages gm
ON gm.topic_id = tg.topic_id AND
gm.group_id = tg.group_id
WHERE tg.group_id IN (SELECT g.group_id FROM group_users g WHERE g.user_id = :user_id)
AND tg.topic_id = :topic_id
) =
(
SELECT case when count(*) = 0 then -1 else count(*) end FROM topic_allowed_groups tg
WHERE tg.group_id IN (SELECT g.group_id FROM group_users g WHERE g.user_id = :user_id)
AND tg.topic_id = :topic_id
)
UNION ALL
SELECT 1 FROM topic_allowed_users tu
JOIN user_archived_messages um ON um.user_id = tu.user_id AND um.topic_id = tu.topic_id
WHERE tu.user_id = :user_id AND tu.topic_id = :topic_id
SQL
DB.exec(sql, user_id: user.id, topic_id: id) > 0
end
TIME_TO_FIRST_RESPONSE_SQL ||= <<-SQL
SELECT AVG(t.hours)::float AS "hours", t.created_at AS "date"
FROM (
SELECT t.id, t.created_at::date AS created_at, EXTRACT(EPOCH FROM MIN(p.created_at) - t.created_at)::float / 3600.0 AS "hours"
FROM topics t
LEFT JOIN posts p ON p.topic_id = t.id
/*where*/
GROUP BY t.id
) t
GROUP BY t.created_at
ORDER BY t.created_at
SQL
TIME_TO_FIRST_RESPONSE_TOTAL_SQL ||= <<-SQL
SELECT AVG(t.hours)::float AS "hours"
FROM (
SELECT t.id, EXTRACT(EPOCH FROM MIN(p.created_at) - t.created_at)::float / 3600.0 AS "hours"
FROM topics t
LEFT JOIN posts p ON p.topic_id = t.id
/*where*/
GROUP BY t.id
) t
SQL
def self.time_to_first_response(sql, opts = nil)
opts ||= {}
builder = DB.build(sql)
builder.where("t.created_at >= :start_date", start_date: opts[:start_date]) if opts[:start_date]
builder.where("t.created_at < :end_date", end_date: opts[:end_date]) if opts[:end_date]
builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: opts[:category_id]) if opts[:category_id]
builder.where("t.archetype <> '#{Archetype.private_message}'")
builder.where("t.deleted_at IS NULL")
builder.where("p.deleted_at IS NULL")
builder.where("p.post_number > 1")
builder.where("p.user_id != t.user_id")
builder.where("p.user_id in (:user_ids)", user_ids: opts[:user_ids]) if opts[:user_ids]
builder.where("p.post_type = :post_type", post_type: Post.types[:regular])
builder.where("EXTRACT(EPOCH FROM p.created_at - t.created_at) > 0")
builder.query_hash
end
def self.time_to_first_response_per_day(start_date, end_date, opts = {})
time_to_first_response(TIME_TO_FIRST_RESPONSE_SQL, opts.merge(start_date: start_date, end_date: end_date))
end
def self.time_to_first_response_total(opts = nil)
total = time_to_first_response(TIME_TO_FIRST_RESPONSE_TOTAL_SQL, opts)
total.first["hours"].to_f.round(2)
end
WITH_NO_RESPONSE_SQL ||= <<-SQL
SELECT COUNT(*) as count, tt.created_at AS "date"
FROM (
SELECT t.id, t.created_at::date AS created_at, MIN(p.post_number) first_reply
FROM topics t
LEFT JOIN posts p ON p.topic_id = t.id AND p.user_id != t.user_id AND p.deleted_at IS NULL AND p.post_type = #{Post.types[:regular]}
/*where*/
GROUP BY t.id
) tt
WHERE tt.first_reply IS NULL OR tt.first_reply < 2
GROUP BY tt.created_at
ORDER BY tt.created_at
SQL
def self.with_no_response_per_day(start_date, end_date, category_id = nil)
builder = DB.build(WITH_NO_RESPONSE_SQL)
builder.where("t.created_at >= :start_date", start_date: start_date) if start_date
builder.where("t.created_at < :end_date", end_date: end_date) if end_date
builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: category_id) if category_id
builder.where("t.archetype <> '#{Archetype.private_message}'")
builder.where("t.deleted_at IS NULL")
builder.query_hash
end
WITH_NO_RESPONSE_TOTAL_SQL ||= <<-SQL
SELECT COUNT(*) as count
FROM (
SELECT t.id, MIN(p.post_number) first_reply
FROM topics t
LEFT JOIN posts p ON p.topic_id = t.id AND p.user_id != t.user_id AND p.deleted_at IS NULL AND p.post_type = #{Post.types[:regular]}
/*where*/
GROUP BY t.id
) tt
WHERE tt.first_reply IS NULL OR tt.first_reply < 2
SQL
def self.with_no_response_total(opts = {})
builder = DB.build(WITH_NO_RESPONSE_TOTAL_SQL)
builder.where(IN_CATEGORY_AND_SUBCATEGORIES_SQL, category_id: opts[:category_id]) if opts[:category_id]
builder.where("t.archetype <> '#{Archetype.private_message}'")
builder.where("t.deleted_at IS NULL")
builder.query_single.first.to_i
end
def convert_to_public_topic(user)
public_topic = TopicConverter.new(self, user).convert_to_public_topic
add_small_action(user, "public_topic") if public_topic
public_topic
end
def convert_to_private_message(user)
private_topic = TopicConverter.new(self, user).convert_to_private_message
add_small_action(user, "private_topic") if private_topic
private_topic
end
def pm_with_non_human_user?
sql = <<~SQL
SELECT 1 FROM topics
LEFT JOIN topic_allowed_groups ON topics.id = topic_allowed_groups.topic_id
WHERE topic_allowed_groups.topic_id IS NULL
AND topics.archetype = :private_message
AND topics.id = :topic_id
AND (
SELECT COUNT(*) FROM topic_allowed_users
WHERE topic_allowed_users.topic_id = :topic_id
AND topic_allowed_users.user_id > 0
) = 1
SQL
result = DB.exec(sql, private_message: Archetype.private_message, topic_id: self.id)
result != 0
end
def featured_link_root_domain
MiniSuffix.domain(URI.parse(URI.encode(self.featured_link)).hostname)
end
def self.private_message_topics_count_per_day(start_date, end_date, topic_subtype)
private_messages
.with_subtype(topic_subtype)
.where('topics.created_at >= ? AND topics.created_at <= ?', start_date, end_date)
.group('date(topics.created_at)')
.order('date(topics.created_at)')
.count
end
def is_category_topic?
@is_category_topic ||= Category.exists?(topic_id: self.id.to_i)
end
def reset_bumped_at
post = ordered_posts.where(
user_deleted: false,
hidden: false,
post_type: Post.types[:regular]
).last || first_post
update!(bumped_at: post.created_at)
end
private
def invite_to_private_message(invited_by, target_user, guardian)
if !guardian.can_send_private_message?(target_user)
raise UserExists.new(I18n.t(
"activerecord.errors.models.topic.attributes.base.cant_send_pm"
))
end
Topic.transaction do
rate_limit_topic_invitation(invited_by)
topic_allowed_users.create!(user_id: target_user.id)
add_small_action(invited_by, "invited_user", target_user.username)
create_invite_notification!(
target_user,
Notification.types[:invited_to_private_message],
invited_by.username
)
end
end
def invite_to_topic(invited_by, target_user, group_ids, guardian)
Topic.transaction do
rate_limit_topic_invitation(invited_by)
if group_ids
(
self.category.groups.where(id: group_ids).where(automatic: false) -
target_user.groups.where(automatic: false)
).each do |group|
if guardian.can_edit_group?(group)
group.add(target_user)
GroupActionLogger
.new(invited_by, group)
.log_add_user_to_group(target_user)
end
end
end
if Guardian.new(target_user).can_see_topic?(self)
create_invite_notification!(
target_user,
Notification.types[:invited_to_topic],
invited_by.username
)
end
end
end
def update_category_topic_count_by(num)
if category_id.present?
Category.where(['id = ?', category_id]).update_all("topic_count = topic_count " + (num > 0 ? '+' : '') + "#{num}")
end
end
def limit_first_day_topics_per_day
apply_per_day_rate_limit_for("first-day-topics", :max_topics_in_first_day)
end
def apply_per_day_rate_limit_for(key, method_name)
RateLimiter.new(user, "#{key}-per-day", SiteSetting.send(method_name), 1.day.to_i)
end
def create_invite_notification!(target_user, notification_type, username)
target_user.notifications.create!(
notification_type: notification_type,
topic_id: self.id,
post_number: 1,
data: {
topic_title: self.title,
display_username: username
}.to_json
)
end
def rate_limit_topic_invitation(invited_by)
RateLimiter.new(
invited_by,
"topic-invitations-per-day",
SiteSetting.max_topic_invitations_per_day,
1.day.to_i
).performed!
true
end
end
# == Schema Information
#
# Table name: topics
#
# id :integer not null, primary key
# title :string not null
# last_posted_at :datetime
# created_at :datetime not null
# updated_at :datetime not null
# views :integer default(0), not null
# posts_count :integer default(0), not null
# user_id :integer
# last_post_user_id :integer not null
# reply_count :integer default(0), not null
# featured_user1_id :integer
# featured_user2_id :integer
# featured_user3_id :integer
# avg_time :integer
# deleted_at :datetime
# highest_post_number :integer default(0), not null
# image_url :string
# like_count :integer default(0), not null
# incoming_link_count :integer default(0), not null
# category_id :integer
# visible :boolean default(TRUE), not null
# moderator_posts_count :integer default(0), not null
# closed :boolean default(FALSE), not null
# archived :boolean default(FALSE), not null
# bumped_at :datetime not null
# has_summary :boolean default(FALSE), not null
# archetype :string default("regular"), not null
# featured_user4_id :integer
# notify_moderators_count :integer default(0), not null
# spam_count :integer default(0), not null
# pinned_at :datetime
# score :float
# subtype :string
# slug :string
# deleted_by_id :integer
# participant_count :integer default(1)
# word_count :integer
# excerpt :string(1000)
# pinned_globally :boolean default(FALSE), not null
# pinned_until :datetime
# fancy_title :string(400)
# highest_staff_post_number :integer default(0), not null
# featured_link :string
#
# Indexes
#
# idx_topics_front_page (deleted_at,visible,archetype,category_id,id)
# idx_topics_user_id_deleted_at (user_id) WHERE (deleted_at IS NULL)
# idxtopicslug (slug) WHERE ((deleted_at IS NULL) AND (slug IS NOT NULL))
# index_topics_on_bumped_at (bumped_at)
# index_topics_on_created_at_and_visible (created_at,visible) WHERE ((deleted_at IS NULL) AND ((archetype)::text <> 'private_message'::text))
# index_topics_on_id_and_deleted_at (id,deleted_at)
# index_topics_on_lower_title (lower((title)::text))
# index_topics_on_pinned_at (pinned_at) WHERE (pinned_at IS NOT NULL)
# index_topics_on_pinned_globally (pinned_globally) WHERE pinned_globally
#
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