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(defparameter +default-datetime-format+
'((:YEAR 4) #\- (:MONTH 2) #\- (:DAY 2) #\T (:HOUR 2) #\: (:MIN 2) #\: (:SEC 2)))
(defclass datetime-form-field (form-field)
((datetime-min :initarg :min
:accessor datetime-min
:initform nil)
(datetime-max :initarg :max
:accessor datetime-max
:initform nil)
(datetime-format :initarg :datetime-format
:accessor datetime-format
:initform +default-datetime-format+)
(widget :initarg :widget
:accessor field-widget
:initform nil))
(:default-initargs
:placeholder "YYYY-MM-DDTHH:MM:SS")
(:documentation "A date input field"))
(defclass datetime-validator (clavier:validator)
((datetime-format :initarg :datetime-format
:accessor datetime-format
:initform +default-datetime-format+))
(:metaclass c2mop:funcallable-standard-class)
(:default-initargs
:message (lambda (validator object)
(declare (ignorable validator object))
"The datetime is invalid"))
(:documentation "A datetime validator. TODO: should perhaps be part of clavier validators"))
(defmethod clavier::%validate ((validator datetime-validator) object &rest args)
(declare (ignore args))
(and
(local-time:parse-timestring
object
:fail-on-error nil
:date-separator #\-
:allow-missing-time-part nil)
t))
;;(clavier:validate (make-instance 'date-validator) "2003-10-10")
(defmethod validate-form-field ((form-field datetime-form-field))
(let ((validator (clavier:fn (lambda (datetime)
(typep datetime 'local-time:timestamp))
(or (field-invalid-message form-field)
"The datetime is invalid"))))
(multiple-value-bind (valid-p error)
(funcall validator
(field-value form-field))
(multiple-value-bind (valid-constraints-p errors)
(call-next-method)
(values (and valid-p valid-constraints-p)
(if error (cons error errors)
errors))))))
(defmethod field-read-from-request ((field datetime-form-field) form parameters)
(let ((value (cdr (assoc (field-request-name field form) parameters :test #'string=))))
(setf (field-value field)
(or
(and value
(local-time:parse-timestring
value
:date-separator #\-
:allow-missing-time-part nil
:fail-on-error nil))
(if (string= value "")
nil
value)))))
(defmethod format-field-value ((field datetime-form-field) value &optional (stream *standard-output*))
(if (typep value 'local-time:timestamp)
(local-time:format-timestring stream value :format (datetime-format field))
(call-next-method)))
(defmethod make-form-field ((field-type (eql :datetime)) &rest args)
(apply #'make-instance 'datetime-form-field args))
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