Class: PresenceController

Inherits:
ApplicationController show all
Defined in:
app/controllers/presence_controller.rb

Constant Summary

Constants inherited from ApplicationController

ApplicationController::LEGACY_NO_THEMES, ApplicationController::LEGACY_NO_UNOFFICIAL_PLUGINS, ApplicationController::NO_PLUGINS, ApplicationController::NO_THEMES, ApplicationController::NO_UNOFFICIAL_PLUGINS, ApplicationController::SAFE_MODE

Constants included from CanonicalURL::ControllerExtensions

CanonicalURL::ControllerExtensions::ALLOWED_CANONICAL_PARAMS

Instance Attribute Summary

Attributes inherited from ApplicationController

#theme_id

Instance Method Summary collapse

Methods inherited from ApplicationController

#application_layout, #can_cache_content?, #clear_notifications, #conditionally_allow_site_embedding, #current_homepage, #discourse_expires_in, #dont_cache_page, #ember_cli_required?, #fetch_user_from_params, #guardian, #handle_permalink, #handle_theme, #handle_unverified_request, #has_escaped_fragment?, #immutable_for, #no_cookies, #perform_refresh_session, #post_ids_including_replies, #preload_json, #rate_limit_second_factor!, #redirect_with_client_support, #render_json_dump, #render_serialized, requires_plugin, #rescue_discourse_actions, #resolve_safe_mode, #secure_session, #serialize_data, #set_current_user_for_logs, #set_layout, #set_mobile_view, #set_mp_snapshot_fields, #show_browser_update?, #store_preloaded, #use_crawler_layout?, #with_resolved_locale

Methods included from VaryHeader

#ensure_vary_header

Methods included from ReadOnlyMixin

#add_readonly_header, #allowed_in_staff_writes_only_mode?, #block_if_readonly_mode, #check_readonly_mode, included, #staff_writes_only_mode?

Methods included from Hijack

#hijack

Methods included from GlobalPath

#cdn_path, #cdn_relative_path, #full_cdn_url, #path, #upload_cdn_path

Methods included from JsonError

#create_errors_json

Methods included from CanonicalURL::ControllerExtensions

#canonical_url, #default_canonical, included

Methods included from CurrentUser

#clear_current_user, #current_user, has_auth_cookie?, #is_api?, #is_user_api?, #log_off_user, #log_on_user, lookup_from_env, #refresh_session

Instance Method Details

#get ⇒ Object 



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# File 'app/controllers/presence_controller.rb', line 10

def get
  names = params.require(:channels)
  if !(names.is_a?(Array) && names.all? { |n| n.is_a? String })
    raise Discourse::InvalidParameters.new(:channels)
  end

  names.uniq!

  if names.length > MAX_CHANNELS_PER_REQUEST
    raise Discourse::InvalidParameters.new("Too many channels")
  end

  user_group_ids =
    if current_user
      GroupUser.where(user_id: current_user.id).pluck("group_id")
    else
      []
    end

  result = {}
  names.each do |name|
    channel = PresenceChannel.new(name)
    if channel.can_view?(user_id: current_user&.id, group_ids: user_group_ids)
      result[name] = PresenceChannelStateSerializer.new(channel.state, root: nil)
    else
      result[name] = nil
    end
  rescue PresenceChannel::NotFound
    result[name] = nil
  end

  render json: result
end

#update ⇒ Object 



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# File 'app/controllers/presence_controller.rb', line 44

def update
  client_id = params[:client_id]
  if !client_id.is_a?(String) || client_id.blank?
    raise Discourse::InvalidParameters.new(:client_id)
  end

  # JS client is designed to throttle to one request per second
  # When no changes are being made, it makes one request every 30 seconds
  RateLimiter.new(nil, "update-presence-#{current_user.id}", 20, 10.seconds).performed!

  present_channels = params[:present_channels]
  if present_channels &&
       !(present_channels.is_a?(Array) && present_channels.all? { |c| c.is_a? String })
    raise Discourse::InvalidParameters.new(:present_channels)
  end

  leave_channels = params[:leave_channels]
  if leave_channels &&
       !(leave_channels.is_a?(Array) && leave_channels.all? { |c| c.is_a? String })
    raise Discourse::InvalidParameters.new(:leave_channels)
  end

  if present_channels && present_channels.length > MAX_CHANNELS_PER_REQUEST
    raise Discourse::InvalidParameters.new("Too many present_channels")
  end

  response = {}

  present_channels&.each do |name|
    PresenceChannel.new(name).present(user_id: current_user&.id, client_id: params[:client_id])
    response[name] = true
  rescue PresenceChannel::NotFound, PresenceChannel::InvalidAccess
    response[name] = false
  end

  leave_channels&.each do |name|
    PresenceChannel.new(name).leave(user_id: current_user&.id, client_id: params[:client_id])
  rescue PresenceChannel::NotFound
    # Do nothing. Don't reveal that this channel doesn't exist
  end

  render json: response
end