Gab Social. All are welcome.

app/controllers/api/base_controller.rb

@@ -0,0 +1,97 @@
+# frozen_string_literal: true
+
+class Api::BaseController < ApplicationController
+  DEFAULT_STATUSES_LIMIT = 20
+  DEFAULT_ACCOUNTS_LIMIT = 40
+
+  include RateLimitHeaders
+
+  skip_before_action :store_current_location
+  skip_before_action :check_user_permissions
+
+  before_action :set_cache_headers
+
+  protect_from_forgery with: :null_session
+
+  rescue_from ActiveRecord::RecordInvalid, GabSocial::ValidationError do |e|
+    render json: { error: e.to_s }, status: 422
+  end
+
+  rescue_from ActiveRecord::RecordNotFound do
+    render json: { error: 'Record not found' }, status: 404
+  end
+
+  rescue_from HTTP::Error, GabSocial::UnexpectedResponseError do
+    render json: { error: 'Remote data could not be fetched' }, status: 503
+  end
+
+  rescue_from OpenSSL::SSL::SSLError do
+    render json: { error: 'Remote SSL certificate could not be verified' }, status: 503
+  end
+
+  rescue_from GabSocial::NotPermittedError do
+    render json: { error: 'This action is not allowed' }, status: 403
+  end
+
+  def doorkeeper_unauthorized_render_options(error: nil)
+    { json: { error: (error.try(:description) || 'Not authorized') } }
+  end
+
+  def doorkeeper_forbidden_render_options(*)
+    { json: { error: 'This action is outside the authorized scopes' } }
+  end
+
+  protected
+
+  def set_pagination_headers(next_path = nil, prev_path = nil)
+    links = []
+    links << [next_path, [%w(rel next)]] if next_path
+    links << [prev_path, [%w(rel prev)]] if prev_path
+    response.headers['Link'] = LinkHeader.new(links) unless links.empty?
+  end
+
+  def limit_param(default_limit)
+    return default_limit unless params[:limit]
+    [params[:limit].to_i.abs, default_limit * 2].min
+  end
+
+  def params_slice(*keys)
+    params.slice(*keys).permit(*keys)
+  end
+
+  def current_resource_owner
+    @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+  end
+
+  def current_user
+    current_resource_owner || super
+  rescue ActiveRecord::RecordNotFound
+    nil
+  end
+
+  def require_user!
+    if !current_user
+      render json: { error: 'This method requires an authenticated user' }, status: 422
+    elsif current_user.disabled?
+      render json: { error: 'Your login is currently disabled' }, status: 403
+    elsif !current_user.confirmed?
+      render json: { error: 'Your login is missing a confirmed e-mail address' }, status: 403
+    elsif !current_user.approved?
+      render json: { error: 'Your login is currently pending approval' }, status: 403
+    else
+      set_user_activity
+    end
+  end
+
+  def render_empty
+    render json: {}, status: 200
+  end
+
+  def authorize_if_got_token!(*scopes)
+    doorkeeper_authorize!(*scopes) if doorkeeper_token
+  end
+
+  def set_cache_headers
+    response.headers['Cache-Control'] = 'no-cache, no-store, max-age=0, must-revalidate'
+  end
+end