319 lines
10 KiB
Ruby
319 lines
10 KiB
Ruby
require_dependency "concern/positionable"
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class Category < ActiveRecord::Base
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include Concern::Positionable
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belongs_to :topic, dependent: :destroy
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if rails4?
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belongs_to :topic_only_relative_url,
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-> { select "id, title, slug" },
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class_name: "Topic",
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foreign_key: "topic_id"
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else
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belongs_to :topic_only_relative_url,
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select: "id, title, slug",
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class_name: "Topic",
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foreign_key: "topic_id"
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end
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belongs_to :user
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belongs_to :latest_post, class_name: "Post"
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has_many :topics
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has_many :category_featured_topics
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has_many :featured_topics, through: :category_featured_topics, source: :topic
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has_many :category_featured_users
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has_many :featured_users, through: :category_featured_users, source: :user
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has_many :category_groups
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has_many :groups, through: :category_groups
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validates :user_id, presence: true
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validates :name, presence: true, uniqueness: true, length: { in: 1..50 }
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validate :parent_category_validator
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before_validation :ensure_slug
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after_save :invalidate_site_cache
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before_save :apply_permissions
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after_create :create_category_definition
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after_create :publish_categories_list
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after_destroy :invalidate_site_cache
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after_destroy :publish_categories_list
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has_one :category_search_data
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belongs_to :parent_category, class_name: 'Category'
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scope :latest, ->{ order('topic_count desc') }
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scope :secured, ->(guardian = nil) {
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ids = guardian.secure_category_ids if guardian
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if ids.present?
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where("NOT categories.read_restricted or categories.id in (:cats)", cats: ids).references(:categories)
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else
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where("NOT categories.read_restricted").references(:categories)
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end
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}
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scope :topic_create_allowed, ->(guardian) {
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if guardian.anonymous?
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where("1=0")
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else
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scoped_to_permissions(guardian, [:full])
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end
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}
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scope :post_create_allowed, ->(guardian) {
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if guardian.anonymous?
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where("1=0")
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else
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scoped_to_permissions(guardian, [:create_post, :full])
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end
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}
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delegate :post_template, to: 'self.class'
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# permission is just used by serialization
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# we may consider wrapping this in another spot
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attr_accessor :displayable_topics, :permission, :subcategory_ids
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def self.scoped_to_permissions(guardian, permission_types)
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if guardian && guardian.is_staff?
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rails4? ? all : scoped
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else
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permission_types = permission_types.map{ |permission_type|
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CategoryGroup.permission_types[permission_type]
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}
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where("categories.id in (
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SELECT c.id FROM categories c
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WHERE (
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NOT c.read_restricted AND
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(
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NOT EXISTS(
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SELECT 1 FROM category_groups cg WHERE cg.category_id = categories.id )
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) OR EXISTS(
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SELECT 1 FROM category_groups cg
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WHERE permission_type in (?) AND
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cg.category_id = categories.id AND
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group_id IN (
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SELECT g.group_id FROM group_users g where g.user_id = ? UNION SELECT ?
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)
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)
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)
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)", permission_types,(!guardian || guardian.user.blank?) ? -1 : guardian.user.id, Group[:everyone].id)
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end
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end
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# Internal: Update category stats: # of topics in past year, month, week for
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# all categories.
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def self.update_stats
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topics = Topic
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.select("COUNT(*) topic_count")
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.where("topics.category_id = categories.id")
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.where("categories.topic_id <> topics.id")
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.visible
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topics_with_post_count = Topic
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.select("topics.category_id, COUNT(*) topic_count, SUM(topics.posts_count) post_count")
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.where("topics.id NOT IN (select cc.topic_id from categories cc WHERE topic_id IS NOT NULL)")
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.group("topics.category_id")
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.visible.to_sql
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topics_year = topics.created_since(1.year.ago).to_sql
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topics_month = topics.created_since(1.month.ago).to_sql
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topics_week = topics.created_since(1.week.ago).to_sql
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Category.exec_sql <<SQL
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UPDATE categories c
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SET topic_count = x.topic_count,
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post_count = x.post_count
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FROM (#{topics_with_post_count}) x
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WHERE x.category_id = c.id AND
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(c.topic_count <> x.topic_count OR c.post_count <> x.post_count)
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SQL
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# TODO don't update unchanged data
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Category.update_all("topics_year = (#{topics_year}),
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topics_month = (#{topics_month}),
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topics_week = (#{topics_week})")
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end
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# Internal: Generate the text of post prompting to enter category
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# description.
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def self.post_template
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I18n.t("category.post_template", replace_paragraph: I18n.t("category.replace_paragraph"))
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end
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def create_category_definition
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t = Topic.new(title: I18n.t("category.topic_prefix", category: name), user: user, pinned_at: Time.now, category_id: id)
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t.skip_callbacks = true
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t.save!
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update_column(:topic_id, t.id)
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t.posts.create(raw: post_template, user: user)
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end
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def topic_url
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topic_only_relative_url.try(:relative_url)
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end
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def ensure_slug
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if name.present?
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self.name.strip!
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self.slug = Slug.for(name)
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return if self.slug.blank?
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# If a category with that slug already exists, set the slug to nil so the category can be found
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# another way.
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category = Category.where(slug: self.slug)
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category = category.where("id != ?", id) if id.present?
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self.slug = '' if category.exists?
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end
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end
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# Categories are cached in the site json, so the caches need to be
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# invalidated whenever the category changes.
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def invalidate_site_cache
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Site.invalidate_cache
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end
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def publish_categories_list
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MessageBus.publish('/categories', {categories: ActiveModel::ArraySerializer.new(Category.latest).as_json})
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end
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def parent_category_validator
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if parent_category_id
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errors.add(:parent_category_id, I18n.t("category.errors.self_parent")) if parent_category_id == id
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grandfather_id = Category.where(id: parent_category_id).pluck(:parent_category_id).first
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errors.add(:base, I18n.t("category.errors.depth")) if grandfather_id
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end
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end
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def group_names=(names)
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# this line bothers me, destroying in AR can not seem to be queued, thinking of extending it
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category_groups.destroy_all unless new_record?
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ids = Group.where(name: names.split(",")).pluck(:id)
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ids.each do |id|
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category_groups.build(group_id: id)
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end
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end
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# will reset permission on a topic to a particular
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# set.
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#
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# Available permissions are, :full, :create_post, :readonly
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# hash can be:
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#
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# :everyone => :full - everyone has everything
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# :everyone => :readonly, :staff => :full
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# 7 => 1 # you can pass a group_id and permission id
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def set_permissions(permissions)
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self.read_restricted, @permissions = Category.resolve_permissions(permissions)
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# Ideally we can just call .clear here, but it runs SQL, we only want to run it
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# on save.
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end
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def permissions=(permissions)
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set_permissions(permissions)
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end
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def apply_permissions
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if @permissions
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category_groups.destroy_all
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@permissions.each do |group_id, permission_type|
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category_groups.build(group_id: group_id, permission_type: permission_type)
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end
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@permissions = nil
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end
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end
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def secure_group_ids
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if self.read_restricted?
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groups.pluck("groups.id")
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end
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end
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def update_latest
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latest_post_id = Post
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.order("posts.created_at desc")
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.where("NOT hidden")
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.joins("join topics on topics.id = topic_id")
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.where("topics.category_id = :id", id: self.id)
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.limit(1)
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.pluck("posts.id")
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.first
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latest_topic_id = Topic
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.order("topics.created_at desc")
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.where("visible")
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.where("topics.category_id = :id", id: self.id)
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.limit(1)
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.pluck("topics.id")
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.first
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self.update_attributes(latest_topic_id: latest_topic_id, latest_post_id: latest_post_id)
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end
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def self.resolve_permissions(permissions)
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read_restricted = true
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everyone = Group::AUTO_GROUPS[:everyone]
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full = CategoryGroup.permission_types[:full]
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mapped = permissions.map do |group,permission|
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group = group.id if Group === group
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# subtle, using Group[] ensures the group exists in the DB
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group = Group[group.to_sym].id unless Fixnum === group
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permission = CategoryGroup.permission_types[permission] unless Fixnum === permission
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[group, permission]
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end
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mapped.each do |group, permission|
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if group == everyone && permission == full
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return [false, []]
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end
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read_restricted = false if group == everyone
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end
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[read_restricted, mapped]
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end
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end
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# == Schema Information
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#
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# Table name: categories
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#
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# id :integer not null, primary key
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# name :string(50) not null
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# color :string(6) default("AB9364"), not null
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# topic_id :integer
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# topic_count :integer default(0), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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# user_id :integer not null
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# topics_year :integer
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# topics_month :integer
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# topics_week :integer
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# slug :string(255) not null
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# description :text
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# text_color :string(6) default("FFFFFF"), not null
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# hotness :float default(5.0), not null
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# read_restricted :boolean default(FALSE), not null
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# auto_close_days :float
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#
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# Indexes
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#
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# index_categories_on_forum_thread_count (topic_count)
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# index_categories_on_name (name) UNIQUE
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#
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