Class: Site

Inherits:
Object
  • Object
show all
Includes:
ActiveModel::Serialization
Defined in:
app/models/site.rb

Overview

A class we can use to serialize the site data

Constant Summary collapse

SITE_JSON_CHANNEL =
"/site_json"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(guardian) ⇒ Site

Returns a new instance of Site.



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# File 'app/models/site.rb', line 36

def initialize(guardian)
  @guardian = guardian
end

Class Method Details

.add_categories_callbacks(&block) ⇒ Object



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# File 'app/models/site.rb', line 28

def self.add_categories_callbacks(&block)
  categories_callbacks << block
end

.all_categories_cacheObject



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# File 'app/models/site.rb', line 64

def self.all_categories_cache
  # Categories do not change often so there is no need for us to run the
  # same query and spend time creating ActiveRecord objects for every requests.
  #
  # Do note that any new association added to the eager loading needs a
  # corresponding ActiveRecord callback to clear the categories cache.
  Discourse
    .cache
    .fetch(categories_cache_key, expires_in: 30.minutes) do
      categories =
        begin
          query =
            Category
              .includes(
                :uploaded_logo,
                :uploaded_logo_dark,
                :uploaded_background,
                :tags,
                :tag_groups,
                :form_templates,
                category_required_tag_groups: :tag_group,
              )
              .joins("LEFT JOIN topics t on t.id = categories.topic_id")
              .select("categories.*, t.slug topic_slug")
              .order(:position)

          query =
            DiscoursePluginRegistry.apply_modifier(:site_all_categories_cache_query, query, self)

          query.to_a
        end

      if preloaded_category_custom_fields.present?
        Category.preload_custom_fields(categories, preloaded_category_custom_fields)
      end

      ActiveModel::ArraySerializer.new(
        categories,
        each_serializer: SiteCategorySerializer,
      ).as_json
    end
end

.categories_cache_keyObject



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# File 'app/models/site.rb', line 56

def self.categories_cache_key
  "site_categories_#{Discourse.git_version}"
end

.categories_callbacksObject



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# File 'app/models/site.rb', line 32

def self.categories_callbacks
  @categories_callbacks ||= []
end

.clear_anon_cache!Object



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# File 'app/models/site.rb', line 227

def self.clear_anon_cache!
  # publishing forces the sequence up
  # the cache is validated based on the sequence
  MessageBus.publish(SITE_JSON_CHANNEL, "")
end

.clear_cacheObject



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# File 'app/models/site.rb', line 60

def self.clear_cache
  Discourse.cache.delete(categories_cache_key)
end

.json_for(guardian) ⇒ Object



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# File 'app/models/site.rb', line 178

def self.json_for(guardian)
  if guardian.anonymous? && SiteSetting.
    return(
      {
        periods: TopTopic.periods.map(&:to_s),
        filters: Discourse.filters.map(&:to_s),
        user_fields:
          UserField
            .includes(:user_field_options)
            .order(:position)
            .all
            .map { |userfield| UserFieldSerializer.new(userfield, root: false, scope: guardian) },
        auth_providers:
          Discourse.enabled_auth_providers.map do |provider|
            AuthProviderSerializer.new(provider, root: false, scope: guardian)
          end,
      }.to_json
    )
  end

  seq = nil

  if guardian.anonymous?
    seq = MessageBus.last_id("/site_json")

    cached_json, cached_seq, cached_version =
      Discourse.redis.mget("site_json", "site_json_seq", "site_json_version")

    if cached_json && seq == cached_seq.to_i && Discourse.git_version == cached_version
      return cached_json
    end
  end

  site = Site.new(guardian)
  json = MultiJson.dump(SiteSerializer.new(site, root: false, scope: guardian))

  if guardian.anonymous?
    Discourse.redis.multi do |transaction|
      transaction.setex "site_json", 1800, json
      transaction.set "site_json_seq", seq
      transaction.set "site_json_version", Discourse.git_version
    end
  end

  json
end

.reset_preloaded_category_custom_fieldsObject



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# File 'app/models/site.rb', line 9

def self.reset_preloaded_category_custom_fields
  self.preloaded_category_custom_fields = Set.new
end

Instance Method Details

#archetypesObject



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# File 'app/models/site.rb', line 170

def archetypes
  Archetype.list.reject { |t| t.id == Archetype.private_message }
end

#auth_providersObject



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# File 'app/models/site.rb', line 174

def auth_providers
  Discourse.enabled_auth_providers
end

#categoriesObject



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# File 'app/models/site.rb', line 107

def categories
  @categories ||=
    begin
      categories = []

      self.class.all_categories_cache.each do |category|
        if @guardian.can_see_serialized_category?(
             category_id: category[:id],
             read_restricted: category[:read_restricted],
           )
          categories << category
        end
      end

      with_children = Set.new
      categories.each { |c| with_children << c[:parent_category_id] if c[:parent_category_id] }

      allowed_topic_create = nil
      unless @guardian.is_admin?
        allowed_topic_create_ids =
          @guardian.anonymous? ? [] : Category.topic_create_allowed(@guardian).pluck(:id)
        allowed_topic_create = Set.new(allowed_topic_create_ids)
      end

      by_id = {}

      notification_levels = CategoryUser.notification_levels_for(@guardian.user)
      default_notification_level = CategoryUser.default_notification_level

      categories.each do |category|
        category[:notification_level] = notification_levels[category[:id]] ||
          default_notification_level
        category[:permission] = CategoryGroup.permission_types[
          :full
        ] if allowed_topic_create&.include?(category[:id]) || @guardian.is_admin?
        category[:has_children] = with_children.include?(category[:id])

        category[:can_edit] = @guardian.can_edit_serialized_category?(
          category_id: category[:id],
          read_restricted: category[:read_restricted],
        )

        by_id[category[:id]] = category
      end

      categories.reject! { |c| c[:parent_category_id] && !by_id[c[:parent_category_id]] }

      self.class.categories_callbacks.each { |callback| callback.call(categories, @guardian) }

      categories
    end
end

#groupsObject



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# File 'app/models/site.rb', line 160

def groups
  query =
    Group.visible_groups(@guardian.user, "groups.name ASC", include_everyone: true).includes(
      :flair_upload,
    )
  query = DiscoursePluginRegistry.apply_modifier(:site_groups_query, query, self)

  query
end

#markdown_additional_optionsObject

Sometimes plugins need to have additional data or options available when rendering custom markdown features/rules that are not available on the default opts.discourse object. These additional options should be namespaced to the plugin adding them.

“‘ Site.markdown_additional_options = { limited_pretty_text_markdown_rules: [] } “`

These are passed down to markdown rules on opts.discourse.additionalOptions.



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# File 'app/models/site.rb', line 25

cattr_accessor :markdown_additional_options

#notification_typesObject



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# File 'app/models/site.rb', line 44

def notification_types
  Notification.types
end

#site_settingObject



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# File 'app/models/site.rb', line 40

def site_setting
  SiteSetting
end

#trust_levelsObject



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# File 'app/models/site.rb', line 48

def trust_levels
  TrustLevel.levels
end

#user_fieldsObject



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# File 'app/models/site.rb', line 52

def user_fields
  UserField.includes(:user_field_options).order(:position).all
end