class Api::V1::ApiController < ActionController::API
##### Doorkeeper
    include Doorkeeper::Rails::Helpers

##### Errors
    rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable_entity_response
    rescue_from ActiveRecord::RecordNotDestroyed, with: :render_unprocessable_entity_response
    rescue_from ActiveRecord::RecordNotFound, with: :render_not_found_response
    rescue_from ActiveRecord::RecordNotSaved, with: :render_unprocessable_entity_response
    rescue_from ActiveRecord::RecordNotUnique, with: :render_unprocessable_entity_response
    rescue_from ActionController::ParameterMissing, with: :render_unprocessable_entity_response

##### Hooks
    before_action :current_user
    before_action :set_default_content_type

##### Responders
    respond_to :json

##### Methods
    # Assign the current user if the Doorkeeper token isn't nil, then
    # update the current user's last seen datetime and last IP address
    # before returning
    def current_user
        @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
        @current_user.update_last_ip_and_last_seen!(request.remote_ip) if @current_user

        return @current_user
    end

    # Set the response content-type
    def set_content_type(content_type)
        response.headers["Content-Type"] = content_type
    end

    # Set the default response content-type to application/javascript
    # with a UTF-8 charset
    def set_default_content_type
        set_content_type("application/javascript; charset=utf-8")
    end

    def current_user
        @current_user ||= User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token

        return @current_user
    end

    ### Error response methods
    def render_unprocessable_entity_response(exception)
        @exception = exception
        render action: 'errors', status: :unprocessable_entity
    end

    def render_not_found_response
        response = { errors: [{ message: "Record could not be found.", code: "not_found" }]}
        render 'not_found', status: :not_found
    end

    def render_unauthorized_response
        render action: 'errors', status: :unauthorized
    end

    private

    def restrict_access
        raise UnauthorizedError unless current_user
    end
end