131 lines
3.8 KiB
Ruby
131 lines
3.8 KiB
Ruby
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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end
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private
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def latest_post_only?
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@options[:latest_post_only]
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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.each do |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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# 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)
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.secured(@guardian)
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if latest_post_only?
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@categories = @categories
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.includes(:latest_post => {:topic => :last_poster} )
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.order('position ASC')
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else
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@categories = @categories
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.order('COALESCE(categories.topics_week, 0) DESC')
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.order('COALESCE(categories.topics_month, 0) DESC')
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.order('COALESCE(categories.topics_year, 0) DESC')
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end
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@categories = @categories.to_a
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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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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
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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?
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topic.category = 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 topics unless we can create them (so we can see the controls)
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def prune_empty
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unless @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 { |c|
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c.displayable_topics.blank? && c.description.blank?
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}
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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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end
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