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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 'discourse_featured_link'
class Topic < ActiveRecord::Base
include ActionView::Helpers::SanitizeHelper
include RateLimiter::OnCreateRecord
include HasCustomFields
include Trashable
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
def self.max_sort_order
@max_sort_order ||= (2 ** 31) - 1
end
def featured_users
@featured_users ||= TopicFeaturedUsers.new(self)
end
def trash!(trashed_by=nil)
update_category_topic_count_by(-1) if deleted_at.nil?
super(trashed_by)
update_flagged_posts_count
end
def recover!
update_category_topic_count_by(1) unless deleted_at.nil?
super
update_flagged_posts_count
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,
:quality_title => { :unless => :private_message? },
: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.archetype == Archetype.default) &&
(!t.user_id || !t.user.staff?)
}
validates :featured_link, allow_nil: true, format: URI::regexp(%w(http https))
validate if: :featured_link do
errors.add(:featured_link, :invalid_category) unless 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?
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_group_users, through: :allowed_groups, source: :users
has_many :allowed_groups, through: :topic_allowed_groups, source: :group
has_many :allowed_users, through: :topic_allowed_users, source: :user
has_many :queued_posts
has_many :topic_tags, dependent: :destroy
has_many :tags, through: :topic_tags
has_many :tag_users, through: :tags
has_one :top_topic
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
belongs_to :auto_close_user, class_name: 'User', foreign_key: :auto_close_user_id
has_many :topic_users
has_many :topic_links
has_many :topic_invites
has_many :invites, through: :topic_invites, source: :invite
has_one :warning
has_one :first_post, -> {where post_number: 1}, class_name: Post
# 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])
}
attr_accessor :ignore_category_auto_close
attr_accessor :skip_callbacks
before_create do
initialize_default_values
inherit_auto_close_from_category
end
after_create do
unless skip_callbacks
changed_to_category(category)
advance_draft_sequence
end
end
before_save do
unless skip_callbacks
cancel_auto_close_job
ensure_topic_has_a_category
end
if title_changed?
write_attribute :fancy_title, Topic.fancy_title(title)
end
end
after_save do
unless skip_callbacks
schedule_auto_close_job
end
banner = "banner".freeze
if archetype_was == banner || archetype == banner
ApplicationController.banner_json_cache.clear
end
if tags_changed
TagUser.auto_watch(topic_id: id)
TagUser.auto_track(topic_id: id)
self.tags_changed = false
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 !@ignore_category_auto_close && self.category && self.category.auto_close_hours && self.auto_close_at.nil?
self.auto_close_based_on_last_post = self.category.auto_close_based_on_last_post
set_auto_close(self.category.auto_close_hours)
end
end
def advance_draft_sequence
if archetype == Archetype.private_message
DraftSequence.next!(user, Draft::NEW_PRIVATE_MESSAGE)
else
DraftSequence.next!(user, Draft::NEW_TOPIC)
end
end
def cancel_auto_close_job
if (auto_close_at_changed? && !auto_close_at_was.nil?) || (auto_close_user_id_changed? && auto_close_at)
self.auto_close_started_at ||= Time.zone.now if auto_close_at
Jobs.cancel_scheduled_job(:close_topic, topic_id: id)
end
end
def schedule_auto_close_job
if auto_close_at && (auto_close_at_changed? || auto_close_user_id_changed?)
options = { topic_id: id, user_id: auto_close_user_id || user_id }
Jobs.enqueue_at(auto_close_at, :close_topic, options)
end
end
def ensure_topic_has_a_category
if category_id.nil? && (archetype.nil? || archetype == Archetype.default)
self.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.try(: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("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_private_messages_per_day)
end
def self.fancy_title(title)
escaped = ERB::Util.html_escape(title)
return unless escaped
HtmlPrettify.render(escaped)
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)
unless new_record?
# make sure data is set in table, this also allows us to change algorithm
# by simply nulling this column
exec_sql("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)
.listable_topics
.includes(:category)
unless 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?
topics = topics.joins("LEFT OUTER JOIN topic_tags ON topic_tags.topic_id = topics.id")
.where("topic_tags.tag_id NOT IN (?)", 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 featured_link
custom_fields[DiscourseFeaturedLink::CUSTOM_FIELD_NAME]
end
def featured_link=(link)
custom_fields[DiscourseFeaturedLink::CUSTOM_FIELD_NAME] = link.strip
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
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 has_meta_data_boolean?(key)
meta_data_string(key) == 'true'
end
def meta_data_string(key)
custom_fields[key.to_s]
end
def self.listable_count_per_day(start_date, end_date, category_id=nil)
result = listable_topics.where('created_at >= ? and created_at <= ?', start_date, end_date)
result = result.where(category_id: category_id) if category_id
result.group('date(created_at)').order('date(created_at)').count
end
def private_message?
archetype == Archetype.private_message
end
MAX_SIMILAR_BODY_LENGTH = 200
# Search for similar topics
def self.similar_to(title, raw, user=nil)
return [] unless title.present?
return [] unless raw.present?
filter_words = Search.prepare_data(title + " " + raw[0...MAX_SIMILAR_BODY_LENGTH]);
ts_query = Search.ts_query(filter_words, nil, "|")
# Exclude category definitions from similar topic suggestions
candidates = Topic.visible
.secured(Guardian.new(user))
.listable_topics
.joins('JOIN topic_search_data s ON topics.id = s.topic_id')
.where("search_data @@ #{ts_query}")
.order("ts_rank(search_data, #{ts_query}) DESC")
.limit(SiteSetting.max_similar_results * 3)
exclude_topic_ids = Category.pluck(:topic_id).compact!
if exclude_topic_ids.present?
candidates = candidates.where("topics.id NOT IN (?)", exclude_topic_ids)
end
candidate_ids = candidates.pluck(:id)
return [] unless candidate_ids.present?
similar = Topic.select(sanitize_sql_array(["topics.*, similarity(topics.title, :title) + similarity(topics.title, :raw) AS similarity, p.cooked as blurb", title: title, raw: raw]))
.joins("JOIN posts AS p ON p.topic_id = topics.id AND p.post_number = 1")
.limit(SiteSetting.max_similar_results)
.where("topics.id IN (?)", candidate_ids)
.where("similarity(topics.title, :title) + similarity(topics.title, :raw) > 0.2", raw: raw, title: title)
.order('similarity desc')
similar
end
def update_status(status, enabled, user, opts={})
TopicStatusUpdate.new(self, user).update!(status, enabled, opts)
DiscourseEvent.trigger(:topic_status_updated, self.id, status, enabled)
end
# Atomically creates the next post number
def self.next_post_number(topic_id, reply = false, whisper = false)
highest = exec_sql("select coalesce(max(post_number),0) as max from posts where topic_id = ?", topic_id).first['max'].to_i
if whisper
result = exec_sql("UPDATE topics
SET highest_staff_post_number = ? + 1
WHERE id = ?
RETURNING highest_staff_post_number", highest, topic_id)
result.first['highest_staff_post_number'].to_i
else
reply_sql = reply ? ", reply_count = reply_count + 1" : ""
result = exec_sql("UPDATE topics
SET highest_staff_post_number = :highest + 1,
highest_post_number = :highest + 1#{reply_sql},
posts_count = posts_count + 1
WHERE id = :topic_id
RETURNING highest_post_number", highest: highest, topic_id: topic_id)
result.first['highest_post_number'].to_i
end
end
def self.reset_all_highest!
exec_sql <<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
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)
result = exec_sql "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
),
posts_count = (
SELECT count(*) FROM posts
WHERE deleted_at IS NULL AND
topic_id = :topic_id AND
post_type <> 4
),
last_posted_at = (
SELECT MAX(created_at) FROM posts
WHERE topic_id = :topic_id AND
deleted_at IS NULL AND
post_type <> 4
)
WHERE id = :topic_id
RETURNING highest_post_number", topic_id: topic_id
highest_post_number = result.first['highest_post_number'].to_i
# Update the forum topic user records
exec_sql "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",
highest: highest_post_number,
topic_id: topic_id
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 = SqlBuilder.new("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*/")
builder.where("x.topic_id = topics.id AND
(topics.avg_time <> x.gmean OR topics.avg_time IS NULL)")
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.find_by(topic_id: id).present?
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.category_id = new_category.id
self.update_column(:category_id, new_category.id)
Category.where(id: old_category.id).update_all("topic_count = topic_count - 1") if old_category
# 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)
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.id == new_category.id
end
true
end
def add_small_action(user, action_code, who=nil)
custom_fields = {}
custom_fields["action_code_who"] = who if who.present?
add_moderator_post(user, nil, post_type: Post.types[:small_action], action_code: action_code, custom_fields: custom_fields)
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?,
skip_notifications: opts[:skip_notifications],
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)
if user = User.find_by(username: username)
topic_user = topic_allowed_users.find_by(user_id: user.id)
if topic_user
topic_user.destroy
add_small_action(removed_by, "removed_user", user.username)
return true
end
end
false
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
# ensure all the notifications are out
PostAlerter.new.after_save_post(last_post)
add_small_action(user, "invited_group", group.name)
end
true
end
# Invite a user to the topic by username or email. Returns success/failure
def invite(invited_by, username_or_email, group_ids=nil, custom_message=nil)
if private_message?
# If the user exists, add them to the message.
user = User.find_by_username_or_email(username_or_email)
raise StandardError.new I18n.t("topic_invite.user_exists") if user.present? && topic_allowed_users.where(user_id: user.id).exists?
if user && topic_allowed_users.create!(user_id: user.id)
# Create a small action message
add_small_action(invited_by, "invited_user", user.username)
# Notify the user they've been invited
user.notifications.create(notification_type: Notification.types[:invited_to_private_message],
topic_id: id,
post_number: 1,
data: { topic_title: title,
display_username: invited_by.username }.to_json)
return true
end
end
if username_or_email =~ /^.+@.+$/ && !SiteSetting.enable_sso && SiteSetting.enable_local_logins
# rate limit topic invite
RateLimiter.new(invited_by, "topic-invitations-per-day", SiteSetting.max_topic_invitations_per_day, 1.day.to_i).performed!
# NOTE callers expect an invite object if an invite was sent via email
invite_by_email(invited_by, username_or_email, group_ids, custom_message)
else
# invite existing member to a topic
user = User.find_by_username(username_or_email)
raise StandardError.new I18n.t("topic_invite.user_exists") if user.present? && topic_allowed_users.where(user_id: user.id).exists?
if user && topic_allowed_users.create!(user_id: user.id)
# rate limit topic invite
RateLimiter.new(invited_by, "topic-invitations-per-day", SiteSetting.max_topic_invitations_per_day, 1.day.to_i).performed!
# Notify the user they've been invited
user.notifications.create(notification_type: Notification.types[:invited_to_topic],
topic_id: id,
post_number: 1,
data: { topic_title: title,
display_username: invited_by.username }.to_json)
return true
else
false
end
end
end
def invite_by_email(invited_by, email, group_ids=nil, custom_message=nil)
Invite.invite_by_email(email, invited_by, self, group_ids, custom_message)
end
def email_already_exists_for?(invite)
invite.email_already_exists and 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)
if opts[:destination_topic_id]
post_mover.to_topic opts[:destination_topic_id]
elsif opts[:title]
post_mover.to_new_topic(opts[:title], opts[:category_id])
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 = {})
@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?
self.archetype = Archetype.banner
self.add_moderator_post(user, I18n.t("archetypes.banner.message.make"))
self.save
MessageBus.publish('/site/banner', banner)
end
def remove_banner!(user)
self.archetype = Archetype.default
self.add_moderator_post(user, I18n.t("archetypes.banner.message.remove"))
self.save
MessageBus.publish('/site/banner', nil)
end
def banner
post = self.posts.order(:post_number).limit(1).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/#{slug}/#{id}"
url << "/#{post_number}" if post_number.to_i > 1
url
end
def relative_url(post_number=nil)
Topic.relative_url(id, slug, post_number)
end
def unsubscribe_url
"#{url}/unsubscribe"
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=nil)
pinned_until = Time.parse(pinned_until) rescue nil
update_columns(
pinned_at: status ? Time.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 self.auto_close
Topic.where("NOT closed AND auto_close_at < ? AND auto_close_user_id IS NOT NULL", 1.minute.ago).each do |t|
t.auto_close
end
end
def auto_close(closer = nil)
if auto_close_at && !closed? && !deleted_at && auto_close_at < 5.minutes.from_now
closer ||= auto_close_user
if Guardian.new(closer).can_moderate?(self)
update_status('autoclosed', true, closer)
end
end
end
# Valid arguments for the auto close time:
# * An integer, which is the number of hours from now to close the topic.
# * A time, like "12:00", which is the time at which the topic will close in the current day
# or the next day if that time has already passed today.
# * A timestamp, like "2013-11-25 13:00", when the topic should close.
# * A timestamp with timezone in JSON format. (e.g., "2013-11-26T21:00:00.000Z")
# * nil, to prevent the topic from automatically closing.
# Options:
# * by_user: User who is setting the auto close time
# * timezone_offset: (Integer) offset from UTC in minutes of the given argument. Default 0.
def set_auto_close(arg, opts={})
self.auto_close_hours = nil
by_user = opts[:by_user]
offset_minutes = opts[:timezone_offset]
if self.auto_close_based_on_last_post
num_hours = arg.to_f
if num_hours > 0
last_post_created_at = self.ordered_posts.last.try(:created_at) || Time.zone.now
self.auto_close_at = last_post_created_at + num_hours.hours
self.auto_close_hours = num_hours
else
self.auto_close_at = nil
end
else
utc = Time.find_zone("UTC")
if arg.is_a?(String) && m = /^(\d{1,2}):(\d{2})(?:\s*[AP]M)?$/i.match(arg.strip)
# a time of day in client's time zone, like "15:00"
now = utc.now
self.auto_close_at = utc.local(now.year, now.month, now.day, m[1].to_i, m[2].to_i)
self.auto_close_at += offset_minutes * 60 if offset_minutes
self.auto_close_at += 1.day if self.auto_close_at < now
self.auto_close_hours = -1
elsif arg.is_a?(String) && arg.include?("-") && timestamp = utc.parse(arg)
# a timestamp in client's time zone, like "2015-5-27 12:00"
self.auto_close_at = timestamp
self.auto_close_at += offset_minutes * 60 if offset_minutes
self.auto_close_hours = -1
self.errors.add(:auto_close_at, :invalid) if timestamp < Time.zone.now
else
num_hours = arg.to_f
if num_hours > 0
self.auto_close_at = num_hours.hours.from_now
self.auto_close_hours = num_hours
else
self.auto_close_at = nil
end
end
end
if self.auto_close_at.nil?
self.auto_close_started_at = nil
else
if self.auto_close_based_on_last_post
self.auto_close_started_at = Time.zone.now
else
self.auto_close_started_at ||= Time.zone.now
end
if by_user.try(:staff?) || by_user.try(:trust_level) == TrustLevel[4]
self.auto_close_user = by_user
else
self.auto_close_user ||= (self.user.staff? || self.user.trust_level == TrustLevel[4] ? self.user : Discourse.system_user)
end
if self.auto_close_at.try(:<, Time.zone.now)
auto_close(auto_close_user)
end
end
self
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
sql = <<SQL
SELECT 1 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
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
User.exec_sql(sql, user_id: user.id, topic_id: id).to_a.length > 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 = SqlBuilder.new(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("t.category_id = :category_id", 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("EXTRACT(EPOCH FROM p.created_at - t.created_at) > 0")
builder.exec
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
/*where*/
GROUP BY t.id
) tt
WHERE tt.first_reply IS NULL
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 = SqlBuilder.new(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("t.category_id = :category_id", category_id: category_id) if category_id
builder.where("t.archetype <> '#{Archetype.private_message}'")
builder.where("t.deleted_at IS NULL")
builder.exec
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
/*where*/
GROUP BY t.id
) tt
WHERE tt.first_reply IS NULL
SQL
def self.with_no_response_total(opts={})
builder = SqlBuilder.new(WITH_NO_RESPONSE_TOTAL_SQL)
builder.where("t.category_id = :category_id", category_id: opts[:category_id]) if opts[:category_id]
builder.where("t.archetype <> '#{Archetype.private_message}'")
builder.where("t.deleted_at IS NULL")
builder.exec.first["count"].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
private
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
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
# vote_count :integer default(0), 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
# percent_rank :float default(1.0), not null
# subtype :string
# slug :string
# auto_close_at :datetime
# auto_close_user_id :integer
# auto_close_started_at :datetime
# deleted_by_id :integer
# participant_count :integer default(1)
# word_count :integer
# excerpt :string(1000)
# pinned_globally :boolean default(FALSE), not null
# auto_close_based_on_last_post :boolean default(FALSE)
# auto_close_hours :float
# pinned_until :datetime
# fancy_title :string(400)
# highest_staff_post_number :integer default(0), not null
#
# Indexes
#
# idx_topics_front_page (deleted_at,visible,archetype,category_id,id)
# idx_topics_user_id_deleted_at (user_id)
# index_topics_on_bumped_at (bumped_at)
# index_topics_on_created_at_and_visible (created_at,visible)
# index_topics_on_id_and_deleted_at (id,deleted_at)
# index_topics_on_pinned_at (pinned_at)
# index_topics_on_pinned_globally (pinned_globally)
#
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