mirror of
https://github.com/codeninjasllc/discourse.git
synced 2024-12-11 00:02:05 -05:00
196 lines
6.5 KiB
Ruby
196 lines
6.5 KiB
Ruby
require_dependency 'pinned_check'
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class CategoryList
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include ActiveModel::Serialization
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attr_accessor :categories,
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:topic_users,
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:uncategorized,
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:draft,
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:draft_key,
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:draft_sequence
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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 unless latest_post_only?
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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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end
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private
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def latest_post_only?
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@options[:latest_posts] and latest_posts_count == 1
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end
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def include_latest_posts?
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@options[:latest_posts] and latest_posts_count > 1
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end
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def latest_posts_count
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@options[:latest_posts].to_i > 0 ? @options[:latest_posts].to_i : SiteSetting.category_featured_topics
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end
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# Retrieve a list of all the topics we'll need
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def find_relevant_topics
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@topics_by_category_id = {}
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category_featured_topics = CategoryFeaturedTopic.select([:category_id, :topic_id]).order(:rank)
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@topics_by_id = {}
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@all_topics = Topic.where(id: category_featured_topics.map(&:topic_id))
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@all_topics = @all_topics.includes(:last_poster) if include_latest_posts?
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@all_topics.each do |t|
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t.include_last_poster = true if include_latest_posts? # hint for serialization
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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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# Find a list of all categories to associate the topics with
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def find_categories
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@categories = Category
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.includes(:featured_users, :topic_only_relative_url, subcategories: [:topic_only_relative_url])
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.secured(@guardian)
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if @options[:parent_category_id].present?
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@categories = @categories.where('categories.parent_category_id = ?', @options[:parent_category_id].to_i)
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end
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@categories = @categories.where(suppress_from_homepage: false) if @options[:is_homepage]
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if SiteSetting.fixed_category_positions
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@categories = @categories.order('position ASC').order('id ASC')
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else
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@categories = @categories.order('COALESCE(categories.posts_week, 0) DESC')
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.order('COALESCE(categories.posts_month, 0) DESC')
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.order('COALESCE(categories.posts_year, 0) DESC')
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.order('id ASC')
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end
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if latest_post_only?
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@categories = @categories.includes(latest_post: { topic: :last_poster })
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end
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@categories = @categories.to_a
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category_user = {}
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unless @guardian.anonymous?
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category_user = Hash[*CategoryUser.where(user: @guardian.user).pluck(:category_id, :notification_level).flatten]
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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.each do |category|
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category.notification_level = category_user[category.id]
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category.permission = CategoryGroup.permission_types[:full] if allowed_topic_create.include?(category.id)
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category.has_children = category.subcategories.present?
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end
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if @options[:parent_category_id].blank?
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subcategories = {}
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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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subcategories[c.parent_category_id] ||= []
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subcategories[c.parent_category_id] << c.id
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to_delete << c
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end
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end
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if subcategories.present?
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@categories.each do |c|
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c.subcategory_ids = subcategories[c.id]
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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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end
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if latest_post_only?
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@all_topics = []
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@categories.each do |c|
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if c.latest_post && c.latest_post.topic && @guardian.can_see?(c.latest_post.topic)
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c.displayable_topics = [c.latest_post.topic]
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topic = c.latest_post.topic
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topic.include_last_poster = true # hint for serialization
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@all_topics << topic
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end
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end
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end
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if @topics_by_category_id
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@categories.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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# Remove any empty categories unless we can create them (so we can see the controls)
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def prune_empty
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if !@guardian.can_create?(Category)
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# Remove categories with no featured topics unless we have the ability to edit one
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@categories.delete_if do |c|
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c.displayable_topics.blank? && c.description.blank?
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end
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elsif !SiteSetting.allow_uncategorized_topics
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# Don't show uncategorized to admins either, if uncategorized topics are not allowed
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# and there are none.
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@categories.delete_if do |c|
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c.uncategorized? && c.displayable_topics.blank?
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end
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end
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end
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# Get forum topic user records if appropriate
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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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# Attach some data for serialization to each topic
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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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def sort_unpinned
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if @guardian.current_user && @all_topics.present?
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# Put unpinned topics at the end of the list
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@categories.each do |c|
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next if c.displayable_topics.blank? || c.displayable_topics.size <= latest_posts_count
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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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unless unpinned.empty?
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c.displayable_topics = (c.displayable_topics - unpinned) + unpinned
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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 trim_results
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@categories.each do |c|
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next if c.displayable_topics.blank?
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c.displayable_topics = c.displayable_topics[0,latest_posts_count]
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end
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end
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end
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