247 lines
7.7 KiB
Ruby
247 lines
7.7 KiB
Ruby
# frozen_string_literal: true
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class CategoryList
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include ActiveModel::Serialization
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cattr_accessor :preloaded_topic_custom_fields
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self.preloaded_topic_custom_fields = Set.new
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attr_accessor :categories, :uncategorized
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def self.register_included_association(association)
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@included_assocations ||= []
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@included_assocations << association if !@included_assocations.include?(association)
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end
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def self.included_associations
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[
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:uploaded_background,
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:uploaded_logo,
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:uploaded_logo_dark,
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:topic_only_relative_url,
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subcategories: [:topic_only_relative_url],
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].concat(@included_assocations || [])
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end
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def initialize(guardian = nil, options = {})
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@guardian = guardian || Guardian.new
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@options = options
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find_relevant_topics if options[:include_topics]
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find_categories
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prune_empty
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find_user_data
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sort_unpinned
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trim_results
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demote_muted
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if preloaded_topic_custom_fields.present?
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displayable_topics = @categories.map(&:displayable_topics)
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displayable_topics.flatten!
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displayable_topics.compact!
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if displayable_topics.present?
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Topic.preload_custom_fields(displayable_topics, preloaded_topic_custom_fields)
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end
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end
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end
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def preload_key
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"categories_list"
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end
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def self.order_categories(categories)
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if SiteSetting.fixed_category_positions
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categories.order(:position, :id)
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else
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allowed_category_ids = categories.pluck(:id) << nil # `nil` is necessary to include categories without any associated topics
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categories
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.left_outer_joins(:featured_topics)
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.where(topics: { category_id: allowed_category_ids })
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.group("categories.id")
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.order("max(topics.bumped_at) DESC NULLS LAST")
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.order("categories.id ASC")
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end
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end
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private
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def find_relevant_topics
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@topics_by_id = {}
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@topics_by_category_id = {}
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category_featured_topics = CategoryFeaturedTopic.select(%i[category_id topic_id]).order(:rank)
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@all_topics =
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Topic.where(id: category_featured_topics.map(&:topic_id)).includes(
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:shared_draft,
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:category,
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{ topic_thumbnails: %i[optimized_image upload] },
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)
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@all_topics = @all_topics.joins(:tags).where(tags: { name: @options[:tag] }) if @options[
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:tag
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].present?
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if @guardian.authenticated?
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@all_topics =
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@all_topics
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.joins(
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"LEFT JOIN topic_users tu ON topics.id = tu.topic_id AND tu.user_id = #{@guardian.user.id.to_i}",
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)
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.joins(
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"LEFT JOIN category_users ON category_users.category_id = topics.category_id AND category_users.user_id = #{@guardian.user.id}",
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)
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.where(
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"COALESCE(tu.notification_level,1) > :muted",
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muted: TopicUser.notification_levels[:muted],
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)
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end
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@all_topics = TopicQuery.remove_muted_tags(@all_topics, @guardian.user).includes(:last_poster)
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@all_topics.each do |t|
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# hint for the serializer
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t.include_last_poster = true
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t.dismissed = dismissed_topic?(t)
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@topics_by_id[t.id] = t
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end
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category_featured_topics.each do |cft|
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@topics_by_category_id[cft.category_id] ||= []
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@topics_by_category_id[cft.category_id] << cft.topic_id
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end
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end
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def dismissed_topic?(topic)
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if @guardian.current_user
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@dismissed_topic_users_lookup ||=
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DismissedTopicUser.lookup_for(@guardian.current_user, @all_topics)
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@dismissed_topic_users_lookup.include?(topic.id)
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else
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false
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end
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end
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def find_categories
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query = Category.includes(CategoryList.included_associations).secured(@guardian)
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query =
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query.where(
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"categories.parent_category_id = ?",
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@options[:parent_category_id].to_i,
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) if @options[:parent_category_id].present?
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query = self.class.order_categories(query)
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query =
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DiscoursePluginRegistry.apply_modifier(:category_list_find_categories_query, query, self)
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@categories = query.to_a
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include_subcategories = @options[:include_subcategories] == true
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notification_levels = CategoryUser.notification_levels_for(@guardian.user)
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default_notification_level = CategoryUser.default_notification_level
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if @options[:parent_category_id].blank?
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subcategory_ids = {}
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subcategory_list = {}
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to_delete = Set.new
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@categories.each do |c|
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if c.parent_category_id.present?
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subcategory_ids[c.parent_category_id] ||= []
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subcategory_ids[c.parent_category_id] << c.id
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if include_subcategories
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subcategory_list[c.parent_category_id] ||= []
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subcategory_list[c.parent_category_id] << c
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end
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to_delete << c
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end
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end
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@categories.each do |c|
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c.subcategory_ids = subcategory_ids[c.id] || []
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c.subcategory_list = subcategory_list[c.id] || [] if include_subcategories
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end
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@categories.delete_if { |c| to_delete.include?(c) }
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end
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allowed_topic_create = Set.new(Category.topic_create_allowed(@guardian).pluck(:id))
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categories_with_descendants.each do |category|
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category.notification_level = notification_levels[category.id] || default_notification_level
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category.permission = CategoryGroup.permission_types[:full] if allowed_topic_create.include?(
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category.id,
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)
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category.has_children = category.subcategories.present?
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end
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if @topics_by_category_id
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categories_with_descendants.each do |c|
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topics_in_cat = @topics_by_category_id[c.id]
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if topics_in_cat.present?
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c.displayable_topics = []
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topics_in_cat.each do |topic_id|
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topic = @topics_by_id[topic_id]
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if topic.present? && @guardian.can_see?(topic)
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# topic.category is very slow under rails 4.2
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topic.association(:category).target = c
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c.displayable_topics << topic
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end
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end
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end
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end
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end
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end
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def prune_empty
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return if SiteSetting.allow_uncategorized_topics
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@categories.delete_if { |c| c.uncategorized? }
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end
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# Attach some data for serialization to each topic
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def find_user_data
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if @guardian.current_user && @all_topics.present?
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topic_lookup = TopicUser.lookup_for(@guardian.current_user, @all_topics)
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@all_topics.each { |ft| ft.user_data = topic_lookup[ft.id] }
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end
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end
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# Put unpinned topics at the end of the list
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def sort_unpinned
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if @guardian.current_user && @all_topics.present?
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categories_with_descendants.each do |c|
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next if c.displayable_topics.blank? || c.displayable_topics.size <= c.num_featured_topics
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unpinned = []
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c.displayable_topics.each do |t|
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unpinned << t if t.pinned_at && PinnedCheck.unpinned?(t, t.user_data)
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end
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c.displayable_topics = (c.displayable_topics - unpinned) + unpinned unless unpinned.empty?
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end
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end
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end
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def demote_muted
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muted_categories = @categories.select { |category| category.notification_level == 0 }
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@categories = @categories.reject { |category| category.notification_level == 0 }
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@categories.concat muted_categories
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end
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def trim_results
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categories_with_descendants.each do |c|
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next if c.displayable_topics.blank?
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c.displayable_topics = c.displayable_topics[0, c.num_featured_topics]
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end
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end
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def categories_with_descendants(categories = @categories)
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return @categories_with_children if @categories_with_children && (categories == @categories)
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return nil if categories.nil?
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result = categories.flat_map { |c| [c, *categories_with_descendants(c.subcategory_list)] }
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@categories_with_children = result if categories == @categories
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result
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end
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end
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