discourse/lib/topic_query.rb

1222 lines
38 KiB
Ruby

# frozen_string_literal: true
#
# Helps us find topics.
# Returns a TopicList object containing the topics found.
#
class TopicQuery
include PrivateMessageLists
PG_MAX_INT ||= 2_147_483_647
DEFAULT_PER_PAGE_COUNT ||= 30
def self.validators
@validators ||=
begin
int = lambda { |x| Integer === x || (String === x && x.match?(/\A-?[0-9]+\z/)) }
zero_up_to_max_int = lambda { |x| int.call(x) && x.to_i.between?(0, PG_MAX_INT) }
array_or_string = lambda { |x| Array === x || String === x }
{
max_posts: zero_up_to_max_int,
min_posts: zero_up_to_max_int,
page: zero_up_to_max_int,
tags: array_or_string,
}
end
end
def self.validate?(option, value)
if fn = validators[option.to_sym]
fn.call(value)
else
true
end
end
def self.public_valid_options
# For these to work in Ember, add them to `controllers/discovery-sortable.js`
@public_valid_options ||= %i[
page
before
bumped_before
topic_ids
category
order
ascending
min_posts
max_posts
status
filter
state
search
q
f
group_name
tags
match_all_tags
no_subcategories
no_tags
exclude_tag
]
end
def self.valid_options
@valid_options ||=
public_valid_options +
%i[
except_topic_ids
limit
page
per_page
visible
guardian
no_definitions
destination_category_id
include_all_pms
include_pms
]
end
# Maps `order` to a columns in `topics`
SORTABLE_MAPPING = {
"likes" => "like_count",
"op_likes" => "op_likes",
"views" => "views",
"posts" => "posts_count",
"activity" => "bumped_at",
"posters" => "participant_count",
"category" => "category_id",
"created" => "created_at",
}
cattr_accessor :results_filter_callbacks
self.results_filter_callbacks = []
attr_accessor :options, :user, :guardian
def self.add_custom_filter(key, &blk)
@custom_filters ||= {}
valid_options << key
public_valid_options << key
@custom_filters[key] = blk
end
def self.remove_custom_filter(key)
@custom_filters.delete(key)
public_valid_options.delete(key)
valid_options.delete(key)
@custom_filters = nil if @custom_filters.length == 0
end
def self.apply_custom_filters(results, topic_query)
if @custom_filters
@custom_filters.each { |key, filter| results = filter.call(results, topic_query) }
end
results
end
def initialize(user = nil, options = {})
options.assert_valid_keys(TopicQuery.valid_options)
@options = options.dup
@user = user
@guardian = options[:guardian] || Guardian.new(@user)
end
def joined_topic_user(list = nil)
(list || Topic).joins(
"LEFT OUTER JOIN topic_users AS tu ON (topics.id = tu.topic_id AND tu.user_id = #{@user.id.to_i})",
)
end
def get_pm_params(topic)
if topic.private_message?
my_group_ids =
topic
.topic_allowed_groups
.joins(
"
LEFT JOIN group_users gu
ON topic_allowed_groups.group_id = gu.group_id
AND gu.user_id = #{@user.id.to_i}
",
)
.where("gu.group_id IS NOT NULL")
.pluck(:group_id)
target_group_ids = topic.topic_allowed_groups.pluck(:group_id)
target_users = topic.topic_allowed_users
if my_group_ids.present?
# strip out users in groups you already belong to
target_users =
target_users.joins(
"LEFT JOIN group_users gu ON gu.user_id = topic_allowed_users.user_id AND #{DB.sql_fragment("gu.group_id IN (?)", my_group_ids)}",
).where("gu.group_id IS NULL")
end
target_user_ids =
target_users.where("NOT topic_allowed_users.user_id = ?", @user.id).pluck(:user_id)
{
topic: topic,
my_group_ids: my_group_ids,
target_group_ids: target_group_ids,
target_user_ids: target_user_ids,
}
end
end
def list_related_for(topic, pm_params: nil)
return if !topic.private_message?
return if @user.blank?
return if !@user.in_any_groups?(SiteSetting.personal_message_enabled_groups_map)
builder = SuggestedTopicsBuilder.new(topic)
pm_params = pm_params || get_pm_params(topic)
if pm_params[:my_group_ids].present?
builder.add_results(
related_messages_group(
pm_params.merge(
count: [6, builder.results_left].max,
exclude: builder.excluded_topic_ids,
),
),
)
else
builder.add_results(
related_messages_user(
pm_params.merge(
count: [6, builder.results_left].max,
exclude: builder.excluded_topic_ids,
),
),
)
end
params = { unordered: true }
params[:preload_posters] = true
create_list(:suggested, params, builder.results)
end
# Return a list of suggested topics for a topic
# The include_random param was added so plugins can generate a suggested topics list without the random topics
def list_suggested_for(topic, pm_params: nil, include_random: true)
# Don't suggest messages unless we have a user, and private messages are
# enabled.
if topic.private_message? &&
(@user.blank? || !@user.in_any_groups?(SiteSetting.personal_message_enabled_groups_map))
return
end
builder = SuggestedTopicsBuilder.new(topic)
pm_params = pm_params || get_pm_params(topic)
if DiscoursePluginRegistry.list_suggested_for_providers.any?
DiscoursePluginRegistry.list_suggested_for_providers.each do |provider|
suggested = provider.call(topic, pm_params, self)
builder.add_results(suggested[:result]) if suggested && !suggested[:result].blank?
end
end
# When logged in we start with different results
if @user
if topic.private_message?
unless builder.full?
builder.add_results(new_messages(pm_params.merge(count: builder.results_left)))
end
unless builder.full?
builder.add_results(unread_messages(pm_params.merge(count: builder.results_left)))
end
else
builder.add_results(
unread_results(
topic: topic,
per_page: builder.results_left,
max_age: SiteSetting.suggested_topics_unread_max_days_old,
),
:high,
)
unless builder.full?
builder.add_results(new_results(topic: topic, per_page: builder.category_results_left))
end
end
end
if !topic.private_message?
if include_random && !builder.full?
builder.add_results(
random_suggested(topic, builder.results_left, builder.excluded_topic_ids),
)
end
end
params = { unordered: true }
params[:preload_posters] = true if topic.private_message?
create_list(:suggested, params, builder.results)
end
# The latest view of topics
def list_latest
create_list(:latest, {}, latest_results)
end
def list_filter
topics_filter =
TopicsFilter.new(
guardian: @guardian,
scope: latest_results(include_muted: false, skip_ordering: true),
)
results = topics_filter.filter_from_query_string(@options[:q])
if !topics_filter.topic_notification_levels.include?(NotificationLevels.all[:muted])
results = remove_muted_topics(results, @user)
end
results = apply_ordering(results) if results.order_values.empty?
create_list(:filter, {}, results)
end
def list_read
create_list(:read, unordered: true) do |topics|
topics.where("tu.last_visited_at IS NOT NULL").order("tu.last_visited_at DESC")
end
end
def list_new
if @user&.new_new_view_enabled?
create_list(:new, { unordered: true }, new_and_unread_results)
else
create_list(:new, { unordered: true }, new_results)
end
end
def list_unread
create_list(:unread, { unordered: true }, unread_results)
end
def list_unseen
create_list(:unseen, { unordered: true }, unseen_results)
end
def list_posted
create_list(:posted) { |l| l.where("tu.posted") }
end
def list_bookmarks
create_list(:bookmarks) { |l| l.where("tu.bookmarked") }
end
def list_top_for(period)
score_column = TopTopic.score_column_for_period(period)
create_list(:top, unordered: true) do |topics|
topics = remove_muted_categories(topics, @user)
topics = topics.joins(:top_topic).where("top_topics.#{score_column} > 0")
if period == :yearly && @user.try(:trust_level) == TrustLevel[0]
topics.order(<<~SQL)
CASE WHEN (
COALESCE(topics.pinned_at, '1900-01-01') > COALESCE(tu.cleared_pinned_at, '1900-01-01')
) THEN 0 ELSE 1 END,
top_topics.#{score_column} DESC,
topics.bumped_at DESC
SQL
else
topics.order(<<~SQL)
COALESCE(top_topics.#{score_column}, 0) DESC, topics.bumped_at DESC
SQL
end
end
end
def list_topics_by(user)
@options[:filtered_to_user] = user.id
create_list(:user_topics) { |topics| topics.where(user_id: user.id) }
end
def list_group_topics(group)
list =
default_results.where(
"
topics.user_id IN (
SELECT user_id FROM group_users gu WHERE gu.group_id = ?
)
",
group.id.to_i,
)
create_list(:group_topics, {}, list)
end
def list_category_topic_ids(category)
query = default_results(category: category.id)
pinned_ids =
query
.where("topics.pinned_at IS NOT NULL AND topics.category_id = ?", category.id)
.limit(nil)
.order("pinned_at DESC")
.pluck(:id)
non_pinned_ids =
query.where("topics.pinned_at IS NULL OR topics.category_id <> ?", category.id).pluck(:id)
(pinned_ids + non_pinned_ids)
end
def list_new_in_category(category)
create_list(:new_in_category, unordered: true, category: category.id) do |list|
list.by_newest.first(25)
end
end
def self.new_filter(list, treat_as_new_topic_start_date: nil, treat_as_new_topic_clause_sql: nil)
if treat_as_new_topic_start_date
list =
list.where("topics.created_at >= :created_at", created_at: treat_as_new_topic_start_date)
else
list = list.where("topics.created_at >= #{treat_as_new_topic_clause_sql}")
end
list.where("tu.last_read_post_number IS NULL").where(
"COALESCE(tu.notification_level, :tracking) >= :tracking",
tracking: TopicUser.notification_levels[:tracking],
)
end
def self.unread_filter(list, whisperer: false)
col_name = whisperer ? "highest_staff_post_number" : "highest_post_number"
list.where("tu.last_read_post_number < topics.#{col_name}").where(
"COALESCE(tu.notification_level, :regular) >= :tracking",
regular: TopicUser.notification_levels[:regular],
tracking: TopicUser.notification_levels[:tracking],
)
end
# Any changes here will need to be reflected in `lib/topic-list-tracked-filter.js` for the `isTrackedTopic` function on
# the client side. The `f=tracked` query param is not heavily used so we do not want to be querying for a topic's
# tracked status by default. Instead, the client will handle the filtering when the `f=tracked` query params is present.
def self.tracked_filter(list, user_id)
tracked_category_ids_sql = <<~SQL
SELECT cd.category_id FROM category_users cd
WHERE cd.user_id = :user_id AND cd.notification_level >= :tracking
SQL
has_sub_sub_categories = SiteSetting.max_category_nesting == 3
sql = +<<~SQL
topics.category_id IN (
SELECT
c.id
FROM categories c
#{has_sub_sub_categories ? "LEFT JOIN categories parent_categories ON parent_categories.id = c.parent_category_id" : ""}
WHERE (c.id IN (#{tracked_category_ids_sql}))
OR c.parent_category_id IN (#{tracked_category_ids_sql})
#{has_sub_sub_categories ? "OR (parent_categories.id IS NOT NULL AND parent_categories.parent_category_id IN (#{tracked_category_ids_sql}))" : ""}
)
SQL
sql << <<~SQL if SiteSetting.tagging_enabled
OR topics.id IN (
SELECT tt.topic_id FROM topic_tags tt WHERE tt.tag_id IN (
SELECT tu.tag_id
FROM tag_users tu
WHERE tu.user_id = :user_id AND tu.notification_level >= :tracking
)
)
SQL
list.where(sql, user_id: user_id, tracking: NotificationLevels.all[:tracking])
end
def prioritize_pinned_topics(topics, options)
pinned_clause =
if options[:category_id]
+"topics.category_id = #{options[:category_id].to_i} AND"
else
+"pinned_globally AND "
end
pinned_clause << " pinned_at IS NOT NULL "
if @user
pinned_clause << " AND (topics.pinned_at > tu.cleared_pinned_at OR tu.cleared_pinned_at IS NULL)"
end
unpinned_topics = topics.where("NOT ( #{pinned_clause} )")
pinned_topics = topics.dup.offset(nil).where(pinned_clause).reorder(pinned_at: :desc)
per_page = options[:per_page] || per_page_setting
limit = per_page unless options[:limit] == false
page = options[:page].to_i
if page == 0
(pinned_topics + unpinned_topics)[0...limit] if limit
else
offset = (page * per_page) - pinned_topics.length
offset = 0 if offset <= 0
unpinned_topics.offset(offset).to_a
end
end
def create_list(filter, options = {}, topics = nil)
options[:filter] ||= filter
topics ||= default_results(options)
topics = yield(topics) if block_given?
topics =
DiscoursePluginRegistry.apply_modifier(:topic_query_create_list_topics, topics, options, self)
options = options.merge(@options)
if %w[activity default].include?(options[:order] || "activity") && !options[:unordered] &&
filter != :private_messages
topics = prioritize_pinned_topics(topics, options)
end
topics = topics.to_a
if options[:preload_posters]
user_ids = []
topics.each do |ft|
user_ids << ft.user_id << ft.last_post_user_id << ft.featured_user_ids <<
ft.allowed_user_ids
end
user_lookup = UserLookup.new(user_ids)
# memoize for loop so we don't keep looking these up
translations = TopicPostersSummary.translations
topics.each do |t|
t.posters = t.posters_summary(user_lookup: user_lookup, translations: translations)
end
end
topics.each do |t|
t.allowed_user_ids = filter == :private_messages ? t.allowed_users.map { |u| u.id } : []
end
list = TopicList.new(filter, @user, topics, options.merge(@options))
list.per_page = options[:per_page] || per_page_setting
list
end
def latest_results(options = {})
result = default_results(options)
result = remove_muted(result, @user, options)
result = apply_shared_drafts(result, get_category_id(options[:category]), options)
# plugins can remove topics here:
self.class.results_filter_callbacks.each do |filter_callback|
result = filter_callback.call(:latest, result, @user, options)
end
result
end
def unseen_results(options = {})
result = default_results(options)
result = unseen_filter(result, @user.first_seen_at, @user.whisperer?) if @user
result = remove_muted(result, @user, options)
result = apply_shared_drafts(result, get_category_id(options[:category]), options)
# plugins can remove topics here:
self.class.results_filter_callbacks.each do |filter_callback|
result = filter_callback.call(:latest, result, @user, options)
end
result
end
def unread_results(options = {})
result =
TopicQuery.unread_filter(
default_results(options.reverse_merge(unordered: true)),
whisperer: @user&.whisperer?,
).order("CASE WHEN topics.user_id = tu.user_id THEN 1 ELSE 2 END")
result = apply_max_age_limit(result, options)
self.class.results_filter_callbacks.each do |filter_callback|
result = filter_callback.call(:unread, result, @user, options)
end
suggested_ordering(result, options)
end
def new_results(options = {})
# TODO does this make sense or should it be ordered on created_at
# it is ordering on bumped_at now
result =
TopicQuery.new_filter(
default_results(options.reverse_merge(unordered: true)),
treat_as_new_topic_start_date: @user.user_option.treat_as_new_topic_start_date,
)
result = remove_muted(result, @user, options)
result = remove_dismissed(result, @user)
self.class.results_filter_callbacks.each do |filter_callback|
result = filter_callback.call(:new, result, @user, options)
end
suggested_ordering(result, options)
end
def new_and_unread_results(options = {})
base = default_results(options.reverse_merge(unordered: true))
new_results =
TopicQuery.new_filter(
base,
treat_as_new_topic_start_date: @user.user_option.treat_as_new_topic_start_date,
)
new_results = remove_muted(new_results, @user, options)
new_results = remove_dismissed(new_results, @user)
unread_results =
apply_max_age_limit(TopicQuery.unread_filter(base, whisperer: @user&.whisperer?), options)
base.joins_values.concat(new_results.joins_values, unread_results.joins_values)
base.joins_values.uniq!
results = base.merge(new_results.or(unread_results))
results = results.order("CASE WHEN topics.user_id = tu.user_id THEN 1 ELSE 2 END")
suggested_ordering(results, options)
end
protected
def per_page_setting
DEFAULT_PER_PAGE_COUNT
end
def apply_shared_drafts(result, category_id, options)
# PERF: avoid any penalty if there are no shared drafts enabled
# on some sites the cost can be high eg: gearbox
return result if SiteSetting.shared_drafts_category == ""
drafts_category_id = SiteSetting.shared_drafts_category.to_i
viewing_shared = category_id && category_id == drafts_category_id
if guardian.can_see_shared_draft?
if options[:destination_category_id]
destination_category_id = get_category_id(options[:destination_category_id])
topic_ids = SharedDraft.where(category_id: destination_category_id).pluck(:topic_id)
return result.where(id: topic_ids)
end
return result.includes(:shared_draft).references(:shared_draft) if viewing_shared
elsif viewing_shared
return(
result.joins("LEFT OUTER JOIN shared_drafts sd ON sd.topic_id = topics.id").where(
"sd.id IS NULL",
)
)
end
result.where("topics.category_id != ?", drafts_category_id)
end
def apply_ordering(result, options = {})
sort_column = SORTABLE_MAPPING[options[:order]] || "default"
sort_dir = (options[:ascending] == "true") ? "ASC" : "DESC"
# If we are sorting in the default order desc, we should consider including pinned
# topics. Otherwise, just use bumped_at.
if sort_column == "default"
if sort_dir == "DESC"
# If something requires a custom order, for example "unread" which sorts the least read
# to the top, do nothing
return result if options[:unordered]
end
sort_column = "bumped_at"
end
# If we are sorting by category, actually use the name
if sort_column == "category_id"
# TODO forces a table scan, slow
return result.references(:categories).order(<<~SQL)
CASE WHEN categories.id = #{SiteSetting.uncategorized_category_id.to_i} THEN '' ELSE categories.name END #{sort_dir}
SQL
end
if sort_column == "op_likes"
return(
result.includes(:first_post).order(
"(SELECT like_count FROM posts p3 WHERE p3.topic_id = topics.id AND p3.post_number = 1) #{sort_dir}",
)
)
end
if sort_column.start_with?("custom_fields")
field = sort_column.split(".")[1]
return(
result.order(
"(SELECT CASE WHEN EXISTS (SELECT true FROM topic_custom_fields tcf WHERE tcf.topic_id::integer = topics.id::integer AND tcf.name = '#{field}') THEN (SELECT value::integer FROM topic_custom_fields tcf WHERE tcf.topic_id::integer = topics.id::integer AND tcf.name = '#{field}') ELSE 0 END) #{sort_dir}",
)
)
end
result.order("topics.#{sort_column} #{sort_dir}")
end
def get_category_id(category_id_or_slug)
return nil unless category_id_or_slug.present?
category_id = category_id_or_slug.to_i
if category_id == 0
category_id = Category.where(slug: category_id_or_slug, parent_category_id: nil).pick(:id)
end
category_id
end
# Create results based on a bunch of default options
def default_results(options = {})
options.reverse_merge!(@options)
options.reverse_merge!(per_page: per_page_setting) unless options[:limit] == false
# Whether to include unlisted (visible = false) topics
viewing_own_topics = @user && @user.id == options[:filtered_to_user]
if options[:visible].nil?
options[:visible] = true if @user.nil? || @user.regular?
options[:visible] = false if @guardian.can_see_unlisted_topics? || viewing_own_topics
end
# Start with a list of all topics
result = Topic.includes(:category)
if @user
result =
result.joins(
"LEFT OUTER JOIN topic_users AS tu ON (topics.id = tu.topic_id AND tu.user_id = #{@user.id.to_i})",
).references("tu")
end
category_id = get_category_id(options[:category])
@options[:category_id] = category_id
if category_id
if options[:no_subcategories]
result = result.where("topics.category_id = ?", category_id)
else
result = result.where("topics.category_id IN (?)", Category.subcategory_ids(category_id))
if !SiteSetting.show_category_definitions_in_topic_lists
result =
result.where(
"categories.topic_id IS DISTINCT FROM topics.id OR topics.category_id = ?",
category_id,
)
end
end
result = result.references(:categories)
if !@options[:order]
filter = (options[:filter] || options[:f])
# category default sort order
sort_order, sort_ascending =
Category.where(id: category_id).pick(:sort_order, :sort_ascending)
if sort_order && (filter.blank? || %i[latest unseen].include?(filter))
options[:order] = sort_order
options[:ascending] = !!sort_ascending ? "true" : "false"
else
options[:order] = "default"
options[:ascending] = "false"
end
end
end
if SiteSetting.tagging_enabled
result = result.includes(:tags)
result = filter_by_tags(result)
end
result = apply_ordering(result, options) if !options[:skip_ordering]
all_listable_topics =
@guardian.filter_allowed_categories(
Topic.unscoped.listable_topics,
category_id_column: "categories.id",
)
if options[:include_pms] || options[:include_all_pms]
all_pm_topics =
if options[:include_all_pms] && @guardian.is_admin?
Topic.unscoped.private_messages
else
Topic.unscoped.private_messages_for_user(@user)
end
result = result.merge(all_listable_topics.or(all_pm_topics))
else
result = result.merge(all_listable_topics)
end
# Don't include the category topics if excluded
if options[:no_definitions]
result = result.where("COALESCE(categories.topic_id, 0) <> topics.id")
end
result = result.limit(options[:per_page]) unless options[:limit] == false
result = result.visible if options[:visible]
result =
result.where.not(topics: { id: options[:except_topic_ids] }).references(:topics) if options[
:except_topic_ids
]
if options[:page]
offset = options[:page].to_i * options[:per_page]
result = result.offset(offset) if offset > 0
end
if options[:topic_ids]
result = result.where("topics.id in (?)", options[:topic_ids]).references(:topics)
end
if search = options[:search].presence
result =
result.where(
"topics.id in (select pp.topic_id from post_search_data pd join posts pp on pp.id = pd.post_id where pd.search_data @@ #{Search.ts_query(term: search.to_s)})",
)
end
# NOTE protect against SYM attack can be removed with Ruby 2.2
#
state = options[:state]
if @user && state && TopicUser.notification_levels.keys.map(&:to_s).include?(state)
level = TopicUser.notification_levels[state.to_sym]
result =
result.where(
"topics.id IN (
SELECT topic_id
FROM topic_users
WHERE user_id = ? AND
notification_level = ?)",
@user.id,
level,
)
end
if before = options[:before]
if (before = before.to_i) > 0
result = result.where("topics.created_at < ?", before.to_i.days.ago)
end
end
if bumped_before = options[:bumped_before]
if (bumped_before = bumped_before.to_i) > 0
result = result.where("topics.bumped_at < ?", bumped_before.to_i.days.ago)
end
end
if status = options[:status]
result =
TopicsFilter.new(scope: result, guardian: @guardian).filter_status(
status: options[:status],
category_id: options[:category],
)
end
if (filter = (options[:filter] || options[:f])) && @user
action = (PostActionType.types[:like] if filter == "liked")
if action
result =
result.where(
"topics.id IN (SELECT pp.topic_id
FROM post_actions pa
JOIN posts pp ON pp.id = pa.post_id
WHERE pa.user_id = :user_id AND
pa.post_action_type_id = :action AND
pa.deleted_at IS NULL
)",
user_id: @user.id,
action: action,
)
end
result = TopicQuery.tracked_filter(result, @user.id) if filter == "tracked"
end
result = result.where("topics.posts_count <= ?", options[:max_posts]) if options[
:max_posts
].present?
result = result.where("topics.posts_count >= ?", options[:min_posts]) if options[
:min_posts
].present?
result = TopicQuery.apply_custom_filters(result, self)
result
end
def remove_muted(list, user, options)
if options && (options[:include_muted].nil? || options[:include_muted]) &&
options[:state] != "muted"
list = remove_muted_topics(list, user)
end
list = remove_muted_categories(list, user, exclude: options[:category])
TopicQuery.remove_muted_tags(list, user, options)
end
def remove_muted_topics(list, user)
if user
list =
list.where(
"COALESCE(tu.notification_level,1) > :muted",
muted: TopicUser.notification_levels[:muted],
)
end
list
end
def remove_muted_categories(list, user, opts = nil)
category_id = get_category_id(opts[:exclude]) if opts
if user
list =
list
.references("cu")
.joins(
"LEFT JOIN category_users ON category_users.category_id = topics.category_id AND category_users.user_id = #{user.id}",
)
.where(
"topics.category_id = :category_id
OR
(COALESCE(category_users.notification_level, :default) <> :muted AND (topics.category_id IS NULL OR topics.category_id NOT IN(:indirectly_muted_category_ids)))
OR tu.notification_level > :regular",
category_id: category_id || -1,
default: CategoryUser.default_notification_level,
indirectly_muted_category_ids:
CategoryUser.indirectly_muted_category_ids(user).presence || [-1],
muted: CategoryUser.notification_levels[:muted],
regular: TopicUser.notification_levels[:regular],
)
elsif SiteSetting.mute_all_categories_by_default
category_ids = [
SiteSetting.default_categories_watching.split("|"),
SiteSetting.default_categories_tracking.split("|"),
SiteSetting.default_categories_watching_first_post.split("|"),
SiteSetting.default_categories_normal.split("|"),
].flatten.map(&:to_i)
category_ids << category_id if category_id.present? && category_ids.exclude?(category_id)
list = list.where("categories.id IN (?)", category_ids) if category_ids.present?
else
category_ids = SiteSetting.default_categories_muted.split("|").map(&:to_i)
category_ids -= [category_id] if category_id.present? && category_ids.include?(category_id)
list = list.where("categories.id NOT IN (?)", category_ids) if category_ids.present?
end
list
end
def self.remove_muted_tags(list, user, opts = {})
if !SiteSetting.tagging_enabled || SiteSetting.remove_muted_tags_from_latest == "never"
return list
end
muted_tag_ids = []
if user.present?
muted_tag_ids = TagUser.lookup(user, :muted).pluck(:tag_id)
else
muted_tag_names = SiteSetting.default_tags_muted.split("|")
muted_tag_ids = Tag.where(name: muted_tag_names).pluck(:id) if muted_tag_names.present?
end
return list if muted_tag_ids.blank?
# if viewing the topic list for a muted tag, show all the topics
if !opts[:no_tags] && opts[:tags].present?
if TagUser
.lookup(user, :muted)
.joins(:tag)
.where("lower(tags.name) = ?", opts[:tags].first.downcase)
.exists?
return list
end
end
if SiteSetting.remove_muted_tags_from_latest == "always"
list =
list.where(
"
NOT EXISTS(
SELECT 1
FROM topic_tags tt
WHERE tt.tag_id IN (:tag_ids)
AND tt.topic_id = topics.id)",
tag_ids: muted_tag_ids,
)
else
list =
list.where(
"
EXISTS (
SELECT 1
FROM topic_tags tt
WHERE tt.tag_id NOT IN (:tag_ids)
AND tt.topic_id = topics.id
) OR NOT EXISTS (SELECT 1 FROM topic_tags tt WHERE tt.topic_id = topics.id)",
tag_ids: muted_tag_ids,
)
end
end
def remove_dismissed(list, user)
if user
list.joins(<<~SQL).where("dismissed_topic_users.id IS NULL")
LEFT JOIN dismissed_topic_users
ON dismissed_topic_users.topic_id = topics.id
AND dismissed_topic_users.user_id = #{user.id.to_i}
SQL
else
list
end
end
def new_messages(params)
TopicQuery.new_filter(
messages_for_groups_or_user(params[:my_group_ids]),
treat_as_new_topic_start_date: Time.at(SiteSetting.min_new_topics_time).to_datetime,
).limit(params[:count])
end
def unread_messages(params)
query =
TopicQuery.unread_filter(
messages_for_groups_or_user(params[:my_group_ids]),
whisperer: @user.whisperer?,
)
first_unread_pm_at =
if params[:my_group_ids].present?
GroupUser.where(user_id: @user.id, group_id: params[:my_group_ids]).minimum(
:first_unread_pm_at,
)
else
UserStat.where(user_id: @user.id).pick(:first_unread_pm_at)
end
query = query.where("topics.updated_at >= ?", first_unread_pm_at) if first_unread_pm_at
query = query.limit(params[:count]) if params[:count]
query
end
def related_messages_user(params)
messages = messages_for_user.limit(params[:count])
messages = allowed_messages(messages, params)
end
def related_messages_group(params)
messages = messages_for_groups_or_user(params[:my_group_ids]).limit(params[:count])
messages = allowed_messages(messages, params)
end
def allowed_messages(messages, params)
user_ids = (params[:target_user_ids] || [])
group_ids = ((params[:target_group_ids] - params[:my_group_ids]) || [])
if user_ids.present?
messages =
messages.joins(
"
LEFT JOIN topic_allowed_users ta2
ON topics.id = ta2.topic_id
AND #{DB.sql_fragment("ta2.user_id IN (?)", user_ids)}
",
)
end
if group_ids.present?
messages =
messages.joins(
"
LEFT JOIN topic_allowed_groups tg2
ON topics.id = tg2.topic_id
AND #{DB.sql_fragment("tg2.group_id IN (?)", group_ids)}
",
)
end
messages =
if user_ids.present? && group_ids.present?
messages.where("ta2.topic_id IS NOT NULL OR tg2.topic_id IS NOT NULL")
elsif user_ids.present?
messages.where("ta2.topic_id IS NOT NULL")
elsif group_ids.present?
messages.where("tg2.topic_id IS NOT NULL")
end
end
def messages_for_groups_or_user(group_ids)
if group_ids.present?
base_messages.joins(
"
LEFT JOIN (
SELECT * FROM topic_allowed_groups _tg
LEFT JOIN group_users gu
ON gu.user_id = #{@user.id.to_i}
AND gu.group_id = _tg.group_id
WHERE #{DB.sql_fragment("gu.group_id IN (?)", group_ids)}
) tg ON topics.id = tg.topic_id
",
).where("tg.topic_id IS NOT NULL")
else
messages_for_user
end
end
def messages_for_user
base_messages.joins(
"
LEFT JOIN topic_allowed_users ta
ON topics.id = ta.topic_id
AND ta.user_id = #{@user.id.to_i}
",
).where("ta.topic_id IS NOT NULL")
end
def base_messages
query =
Topic.where("topics.archetype = ?", Archetype.private_message).joins(
"LEFT JOIN topic_users tu ON topics.id = tu.topic_id AND tu.user_id = #{@user.id.to_i}",
)
query = query.includes(:tags) if SiteSetting.tagging_enabled
query.order("topics.bumped_at DESC")
end
def random_suggested(topic, count, excluded_topic_ids = [])
result = default_results(unordered: true, per_page: count).where(closed: false, archived: false)
if SiteSetting.limit_suggested_to_category
excluded_topic_ids += Category.where(id: topic.category_id).pluck(:id)
else
excluded_topic_ids += Category.topic_ids.to_a
end
result =
result.where("topics.id NOT IN (?)", excluded_topic_ids) unless excluded_topic_ids.empty?
result = remove_muted_categories(result, @user)
result = remove_muted_topics(result, @user)
# If we are in a category, prefer it for the random results
if topic.category_id
result =
result.order("CASE WHEN topics.category_id = #{topic.category_id.to_i} THEN 0 ELSE 1 END")
end
# Best effort, it over selects, however if you have a high number
# of muted categories there is tiny chance we will not select enough
# in particular this can happen if current category is empty and tons
# of muted, big edge case
#
# we over select in case cache is stale
max = (count * 1.3).to_i
ids = SiteSetting.limit_suggested_to_category ? [] : RandomTopicSelector.next(max)
ids.concat(RandomTopicSelector.next(max, topic.category))
result.where(id: ids.uniq)
end
def suggested_ordering(result, options)
# Prefer unread in the same category
if options[:topic] && options[:topic].category_id
result =
result.order(
"CASE WHEN topics.category_id = #{options[:topic].category_id.to_i} THEN 0 ELSE 1 END",
)
end
result.order("topics.bumped_at DESC")
end
private
def unseen_filter(list, user_first_seen_at, whisperer)
list = list.where("topics.bumped_at >= ?", user_first_seen_at)
col_name = whisperer ? "highest_staff_post_number" : "highest_post_number"
list.where("tu.last_read_post_number IS NULL OR tu.last_read_post_number < topics.#{col_name}")
end
def apply_max_age_limit(results, options)
if @user
# micro optimisation so we don't load up all of user stats which we do not need
unread_at =
DB.query_single("select first_unread_at from user_stats where user_id = ?", @user.id).first
if max_age = options[:max_age]
max_age_date = max_age.days.ago
unread_at ||= max_age_date
unread_at = unread_at > max_age_date ? unread_at : max_age_date
end
# perf note, in the past we tried doing this in a subquery but performance was
# terrible, also tried with a join and it was bad
results = results.where("topics.updated_at >= ?", unread_at)
end
results
end
def filter_by_tags(result)
tags_arg = @options[:tags]
if tags_arg && tags_arg.size > 0
tags_arg = tags_arg.split if String === tags_arg
tags_query = tags_arg[0].is_a?(String) ? Tag.where_name(tags_arg) : Tag.where(id: tags_arg)
tags = tags_query.select(:id, :target_tag_id).map { |t| t.target_tag_id || t.id }.uniq
if ActiveModel::Type::Boolean.new.cast(@options[:match_all_tags])
# ALL of the given tags:
if tags_arg.length == tags.length
tags.each_with_index do |tag, index|
sql_alias = ["t", index].join
result =
result.joins(
"INNER JOIN topic_tags #{sql_alias} ON #{sql_alias}.topic_id = topics.id AND #{sql_alias}.tag_id = #{tag}",
)
end
else
result = result.none # don't return any results unless all tags exist in the database
end
else
# ANY of the given tags:
result = result.joins(:tags).where("tags.id in (?)", tags)
end
# TODO: this is very side-effecty and should be changed
# It is done cause further up we expect normalized tags
@options[:tags] = tags
elsif @options[:no_tags]
# the following will do: ("topics"."id" NOT IN (SELECT DISTINCT "topic_tags"."topic_id" FROM "topic_tags"))
result = result.where.not(id: TopicTag.distinct.select(:topic_id))
end
if @options[:exclude_tag].present? &&
!DiscourseTagging.hidden_tag_names(@guardian).include?(@options[:exclude_tag])
result = result.where(<<~SQL, name: @options[:exclude_tag])
topics.id NOT IN (
SELECT topic_tags.topic_id
FROM topic_tags
INNER JOIN tags ON tags.id = topic_tags.tag_id
WHERE tags.name = :name
)
SQL
end
result
end
end