| 1 | (in-package :lisp-on-lines) |
| 2 | |
| 3 | (defclass #.(defining-description 'validate) () |
| 4 | ((invalid-object-condition-map :layered t :special t )) |
| 5 | (:metaclass standard-description-class)) |
| 6 | |
| 7 | (define-layered-class standard-attribute |
| 8 | :in-layer #.(defining-description 'validate) |
| 9 | () |
| 10 | ((validators |
| 11 | :initform nil |
| 12 | :layered-accessor attribute-validators |
| 13 | :initarg :validate |
| 14 | :layered t |
| 15 | :special t))) |
| 16 | |
| 17 | (define-condition validation-condition () |
| 18 | ((format-string :accessor validation-condition-format-string |
| 19 | :initarg :format-string) |
| 20 | (format-args :accessor validation-condition-format-args |
| 21 | :initarg :format-args) |
| 22 | (object :accessor validation-condition-object |
| 23 | :initarg :object) |
| 24 | (attribute :accessor validation-condition-attribute |
| 25 | :initarg :attribute))) |
| 26 | |
| 27 | (define-layered-method (setf attribute-value) |
| 28 | :in-layer #.(defining-description 'validate) |
| 29 | :around (value attribute) |
| 30 | (prog1 value (when (validate-attribute-value attribute value) |
| 31 | (call-next-method)))) |
| 32 | |
| 33 | (defun validate-attribute-value (attribute value) |
| 34 | (every #'identity (mapcar (lambda (validator-name) |
| 35 | (let ((validator (find-validator validator-name))) |
| 36 | |
| 37 | (if validator |
| 38 | (funcall validator attribute value) |
| 39 | (prog1 t (warn "Unkown Validator ~A" validator-name))))) |
| 40 | (attribute-validators attribute)))) |
| 41 | |
| 42 | |
| 43 | (defstruct validation-info (invalid-objects)) |
| 44 | |
| 45 | (defvar *invalid-objects*) |
| 46 | |
| 47 | (defvar *validators* (make-hash-table)) |
| 48 | |
| 49 | (defun register-validator (name fn) |
| 50 | (setf (gethash name *validators*) fn)) |
| 51 | |
| 52 | (defun find-validator (name) |
| 53 | (gethash name *validators*)) |
| 54 | |
| 55 | (register-validator 'boundp |
| 56 | (lambda (a v) |
| 57 | (if (unbound-slot-value-p v) |
| 58 | (prog1 nil |
| 59 | (signal (make-condition 'validation-condition |
| 60 | :format-string "You must provide a value for ~A" |
| 61 | :format-args (list (attribute-label a)) |
| 62 | :attribute a |
| 63 | :object (attribute-object a)))) |
| 64 | t))) |
| 65 | |
| 66 | (defun validp (object) |
| 67 | |
| 68 | (with-described-object (object nil) |
| 69 | (every #'identity (mapcar (lambda (attribute) |
| 70 | (validate-attribute-value attribute (attribute-value attribute))) |
| 71 | (attributes (description-of object)))))) |
| 72 | |
| 73 | (define-layered-method lol::display-attribute-editor |
| 74 | :in-layer #.(defining-description 'validate) |
| 75 | :after (attribute) |
| 76 | (let ((conditions (remove-if-not (lambda (a) |
| 77 | (eq a attribute)) |
| 78 | (gethash |
| 79 | (attribute-object attribute) |
| 80 | lol::*invalid-objects*) |
| 81 | :key #'car))) |
| 82 | (dolist (c conditions) |
| 83 | (<:div :style "color:red" |
| 84 | (<:as-html |
| 85 | (apply #'format nil (validation-condition-format-string (cdr c)) |
| 86 | (validation-condition-format-args (cdr c)))))))) |
| 87 | |
| 88 | |
| 89 | |
| 90 | (defmethod validate-object ((description standard-description-object) object) |
| 91 | (let (invalid-object?) |
| 92 | (handler-bind ((validation-condition |
| 93 | (setf invalid-object? t)))))) |
| 94 | |
| 95 | |
| 96 | |