discourse/app/models/category_list.rb

190 lines
6.1 KiB
Ruby

require_dependency 'pinned_check'
class CategoryList
include ActiveModel::Serialization
attr_accessor :categories,
:topic_users,
:uncategorized,
:draft,
:draft_key,
:draft_sequence
def initialize(guardian=nil, options = {})
@guardian = guardian || Guardian.new
@options = options
find_relevant_topics unless latest_post_only?
find_categories
prune_empty
find_user_data
sort_unpinned
trim_results
end
private
def latest_post_only?
@options[:latest_posts] and latest_posts_count == 1
end
def include_latest_posts?
@options[:latest_posts] and latest_posts_count > 1
end
def latest_posts_count
@options[:latest_posts].to_i > 0 ? @options[:latest_posts].to_i : SiteSetting.category_featured_topics
end
# Retrieve a list of all the topics we'll need
def find_relevant_topics
@topics_by_category_id = {}
category_featured_topics = CategoryFeaturedTopic.select([:category_id, :topic_id]).order(:rank)
@topics_by_id = {}
@all_topics = Topic.where(id: category_featured_topics.map(&:topic_id))
@all_topics = @all_topics.includes(:last_poster) if include_latest_posts?
@all_topics.each do |t|
t.include_last_poster = true if include_latest_posts? # hint for serialization
@topics_by_id[t.id] = t
end
category_featured_topics.each do |cft|
@topics_by_category_id[cft.category_id] ||= []
@topics_by_category_id[cft.category_id] << cft.topic_id
end
end
# Find a list of all categories to associate the topics with
def find_categories
@categories = Category
.includes(:featured_users, :topic_only_relative_url, subcategories: [:topic_only_relative_url])
.secured(@guardian)
if @options[:parent_category_id].present?
@categories = @categories.where('categories.parent_category_id = ?', @options[:parent_category_id].to_i)
end
@categories = @categories.where(suppress_from_homepage: false) if @options[:is_homepage]
if SiteSetting.fixed_category_positions
@categories = @categories.order('position ASC').order('id ASC')
else
@categories = @categories.order('COALESCE(categories.posts_week, 0) DESC')
.order('COALESCE(categories.posts_month, 0) DESC')
.order('COALESCE(categories.posts_year, 0) DESC')
.order('id ASC')
end
if latest_post_only?
@categories = @categories.includes(latest_post: { topic: :last_poster })
end
@categories = @categories.to_a
category_user = {}
unless @guardian.anonymous?
category_user = Hash[*CategoryUser.where(user: @guardian.user).pluck(:category_id, :notification_level).flatten]
end
allowed_topic_create = Set.new(Category.topic_create_allowed(@guardian).pluck(:id))
@categories.each do |category|
category.notification_level = category_user[category.id]
category.permission = CategoryGroup.permission_types[:full] if allowed_topic_create.include?(category.id)
category.has_children = category.subcategories.present?
end
if @options[:parent_category_id].blank?
subcategories = {}
to_delete = Set.new
@categories.each do |c|
if c.parent_category_id.present?
subcategories[c.parent_category_id] ||= []
subcategories[c.parent_category_id] << c.id
to_delete << c
end
end
if subcategories.present?
@categories.each do |c|
c.subcategory_ids = subcategories[c.id]
end
@categories.delete_if {|c| to_delete.include?(c) }
end
end
if latest_post_only?
@all_topics = []
@categories.each do |c|
if c.latest_post && c.latest_post.topic && @guardian.can_see?(c.latest_post.topic)
c.displayable_topics = [c.latest_post.topic]
topic = c.latest_post.topic
topic.include_last_poster = true # hint for serialization
@all_topics << topic
end
end
end
if @topics_by_category_id
@categories.each do |c|
topics_in_cat = @topics_by_category_id[c.id]
if topics_in_cat.present?
c.displayable_topics = []
topics_in_cat.each do |topic_id|
topic = @topics_by_id[topic_id]
if topic.present? && @guardian.can_see?(topic)
# topic.category is very slow under rails 4.2
topic.association(:category).target = c
c.displayable_topics << topic
end
end
end
end
end
end
def prune_empty
unless SiteSetting.allow_uncategorized_topics
# HACK: Don't show uncategorized to anyone if not allowed
@categories.delete_if do |c|
c.uncategorized? && c.displayable_topics.blank?
end
end
end
# Get forum topic user records if appropriate
def find_user_data
if @guardian.current_user && @all_topics.present?
topic_lookup = TopicUser.lookup_for(@guardian.current_user, @all_topics)
# Attach some data for serialization to each topic
@all_topics.each { |ft| ft.user_data = topic_lookup[ft.id] }
end
end
def sort_unpinned
if @guardian.current_user && @all_topics.present?
# Put unpinned topics at the end of the list
@categories.each do |c|
next if c.displayable_topics.blank? || c.displayable_topics.size <= latest_posts_count
unpinned = []
c.displayable_topics.each do |t|
unpinned << t if t.pinned_at && PinnedCheck.unpinned?(t, t.user_data)
end
unless unpinned.empty?
c.displayable_topics = (c.displayable_topics - unpinned) + unpinned
end
end
end
end
def trim_results
@categories.each do |c|
next if c.displayable_topics.blank?
c.displayable_topics = c.displayable_topics[0,latest_posts_count]
end
end
end