Class: TopicQuery

Inherits:
Object
  • Object
show all
Includes:
PrivateMessageLists
Defined in:
lib/topic_query.rb,
lib/topic_query/private_message_lists.rb

Overview

Helps us find topics. Returns a TopicList object containing the topics found.

Defined Under Namespace

Modules: PrivateMessageLists

Constant Summary collapse

PG_MAX_INT =
2_147_483_647
DEFAULT_PER_PAGE_COUNT =
30
SORTABLE_MAPPING =

Maps ‘order` to a columns in `topics`

{
  "likes" => "like_count",
  "op_likes" => "op_likes",
  "views" => "views",
  "posts" => "posts_count",
  "activity" => "bumped_at",
  "posters" => "participant_count",
  "category" => "category_id",
  "created" => "created_at",
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from PrivateMessageLists

#filter_private_message_new, #filter_private_messages_unread, #list_private_messages, #list_private_messages_archive, #list_private_messages_direct_and_groups, #list_private_messages_group, #list_private_messages_group_archive, #list_private_messages_group_new, #list_private_messages_group_unread, #list_private_messages_new, #list_private_messages_sent, #list_private_messages_tag, #list_private_messages_unread, #list_private_messages_warnings, #private_messages_for

Constructor Details

#initialize(user = nil, options = {}) ⇒ TopicQuery

Returns a new instance of TopicQuery.



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# File 'lib/topic_query.rb', line 141

def initialize(user = nil, options = {})
  options.assert_valid_keys(TopicQuery.valid_options)
  @options = options.dup
  @user = user
  @guardian = options[:guardian] || Guardian.new(@user)
end

Instance Attribute Details

#guardianObject

Returns the value of attribute guardian.



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# File 'lib/topic_query.rb', line 118

def guardian
  @guardian
end

#optionsObject

Returns the value of attribute options.



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# File 'lib/topic_query.rb', line 118

def options
  @options
end

#userObject

Returns the value of attribute user.



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# File 'lib/topic_query.rb', line 118

def user
  @user
end

Class Method Details

.add_custom_filter(key, &blk) ⇒ Object



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# File 'lib/topic_query.rb', line 120

def self.add_custom_filter(key, &blk)
  @custom_filters ||= {}
  valid_options << key
  public_valid_options << key
  @custom_filters[key] = blk
end

.apply_custom_filters(results, topic_query) ⇒ Object



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# File 'lib/topic_query.rb', line 134

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

.new_filter(list, treat_as_new_topic_start_date: nil, treat_as_new_topic_clause_sql: nil) ⇒ Object



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# File 'lib/topic_query.rb', line 429

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

.public_valid_optionsObject



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# File 'lib/topic_query.rb', line 58

def self.public_valid_options
  # For these to work in Ember, add them to `controllers/discovery/list.js`
  @public_valid_options ||= %i[
    page
    before
    bumped_before
    topic_ids
    category
    order
    ascending
    min_posts
    max_posts
    status
    filter
    state
    search
    q
    f
    subset
    group_name
    tags
    match_all_tags
    no_subcategories
    no_tags
    exclude_tag
  ]
end

.remove_custom_filter(key) ⇒ Object



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# File 'lib/topic_query.rb', line 127

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

.tracked_filter(list, user_id) ⇒ Object

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.



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# File 'lib/topic_query.rb', line 456

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

.unread_filter(list, whisperer: false) ⇒ Object



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# File 'lib/topic_query.rb', line 443

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

.valid_optionsObject



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# File 'lib/topic_query.rb', line 86

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

.validate?(option, value) ⇒ Boolean

Returns:

  • (Boolean)


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# File 'lib/topic_query.rb', line 50

def self.validate?(option, value)
  if fn = validators[option.to_sym]
    fn.call(value)
  else
    true
  end
end

.validatorsObject



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# File 'lib/topic_query.rb', line 14

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 }
      string = lambda { |x| String === x }
      true_or_false = lambda { |x| x == true || x == false || x == "true" || x == "false" }

      {
        page: zero_up_to_max_int,
        before: zero_up_to_max_int,
        bumped_before: zero_up_to_max_int,
        topic_ids: array_or_string,
        category: string,
        order: string,
        ascending: true_or_false,
        min_posts: zero_up_to_max_int,
        max_posts: zero_up_to_max_int,
        status: string,
        filter: string,
        state: string,
        search: string,
        q: string,
        f: string,
        subset: string,
        group_name: string,
        tags: array_or_string,
        match_all_tags: true_or_false,
        no_subcategories: true_or_false,
        no_tags: true_or_false,
        exclude_tag: string,
      }
    end
end

Instance Method Details

#create_list(filter, options = {}, topics = nil) ⇒ Object



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# File 'lib/topic_query.rb', line 519

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)

  apply_pinning = filter != :private_messages
  apply_pinning &&= %w[activity default].include?(options[:order] || "activity")
  apply_pinning &&= !options[:unordered] || options[:prioritize_pinned]

  topics = prioritize_pinned_topics(topics, options) if apply_pinning

  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|
    if filter == :private_messages
      t.allowed_user_ids = t.allowed_users.map { |u| u.id }
      t.allowed_group_ids = t.allowed_groups.map { |g| g.id }
    else
      t.allowed_user_ids = []
      t.allowed_group_ids = []
    end
  end

  list = TopicList.new(filter, @user, topics, options.merge(@options))
  list.per_page = options[:per_page] || per_page_setting
  list
end

#get_pm_params(topic) ⇒ Object



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# File 'lib/topic_query.rb', line 154

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

#joined_topic_user(list = nil) ⇒ Object



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# File 'lib/topic_query.rb', line 148

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

#latest_results(options = {}) ⇒ Object



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# File 'lib/topic_query.rb', line 568

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

#list_bookmarksObject



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# File 'lib/topic_query.rb', line 355

def list_bookmarks
  create_list(:bookmarks) { |l| l.where("tu.bookmarked") }
end

#list_category_topic_ids(category) ⇒ Object



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# File 'lib/topic_query.rb', line 410

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

#list_filterObject



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# File 'lib/topic_query.rb', line 302

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

#list_group_topics(group) ⇒ Object



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# File 'lib/topic_query.rb', line 396

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

#list_hotObject



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# File 'lib/topic_query.rb', line 359

def list_hot
  create_list(:hot, unordered: true, prioritize_pinned: true) do |topics|
    topics = remove_muted_topics(topics, user)
    topics = remove_muted_categories(topics, user, exclude: options[:category])
    TopicQuery.remove_muted_tags(topics, user, options)
    topics.joins("JOIN topic_hot_scores on topics.id = topic_hot_scores.topic_id").order(
      "topic_hot_scores.score DESC",
    )
  end
end

#list_latestObject

The latest view of topics



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# File 'lib/topic_query.rb', line 298

def list_latest
  create_list(:latest, {}, latest_results)
end

#list_newObject



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# File 'lib/topic_query.rb', line 326

def list_new
  if @user&.new_new_view_enabled?
    list =
      case @options[:subset]
      when "topics"
        new_results
      when "replies"
        unread_results
      else
        new_and_unread_results
      end
    create_list(:new, { unordered: true }, list)
  else
    create_list(:new, { unordered: true }, new_results)
  end
end

#list_new_in_category(category) ⇒ Object



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# File 'lib/topic_query.rb', line 423

def list_new_in_category(category)
  create_list(:new_in_category, unordered: true, category: category.id) do |list|
    list.by_newest.limit(25)
  end
end

#list_postedObject



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# File 'lib/topic_query.rb', line 351

def list_posted
  create_list(:posted) { |l| l.where("tu.posted") }
end

#list_readObject



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# File 'lib/topic_query.rb', line 320

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


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# File 'lib/topic_query.rb', line 193

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

#list_suggested_for(topic, pm_params: nil, include_random: true) ⇒ Object

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



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# File 'lib/topic_query.rb', line 229

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
      if @user.new_new_view_enabled?
        builder.add_results(
          new_and_unread_results(
            topic:,
            per_page: builder.results_left,
            max_age: SiteSetting.suggested_topics_unread_max_days_old,
          ),
        )
      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
  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

#list_top_for(period) ⇒ Object



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# File 'lib/topic_query.rb', line 370

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

#list_topics_by(user) ⇒ Object



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# File 'lib/topic_query.rb', line 391

def list_topics_by(user)
  @options[:filtered_to_user] = user.id
  create_list(:user_topics) { |topics| topics.where(user_id: user.id) }
end

#list_unreadObject



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# File 'lib/topic_query.rb', line 343

def list_unread
  create_list(:unread, { unordered: true }, unread_results)
end

#list_unseenObject



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# File 'lib/topic_query.rb', line 347

def list_unseen
  create_list(:unseen, { unordered: true }, unseen_results)
end

#new_and_unread_results(options = {}) ⇒ Object



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# File 'lib/topic_query.rb', line 629

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

#new_results(options = {}) ⇒ Object



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# File 'lib/topic_query.rb', line 611

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

#prioritize_pinned_topics(topics, options) ⇒ Object



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# File 'lib/topic_query.rb', line 489

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

#unread_results(options = {}) ⇒ Object



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# File 'lib/topic_query.rb', line 595

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

#unseen_results(options = {}) ⇒ Object



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# File 'lib/topic_query.rb', line 581

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