(in-package #:chatikbot)

(defvar *hooks* (make-hash-table) "Hooks storage")

(defun run-hooks (event &rest arguments)
  (let ((hooks (gethash event *hooks*)))
    (labels ((try-handle (func)
               (apply func arguments)))
      (unless (some #'try-handle hooks)
        (log:info "unhandled" event arguments)))))

(defun add-hook (event hook &optional append)
  (let ((existing (gethash event *hooks*))
        (func (if (functionp hook) hook (symbol-function hook))))
    (unless (member func existing)
      (setf (gethash event *hooks*)
            (if append (append existing (list func))
                (cons func existing))))))

(defun remove-hook (event hook)
  (setf (gethash event *hooks*)
        (remove (if (functionp hook) hook (symbol-function hook))
                (gethash event *hooks*))))

(defun string-to-event (key)
  (intern (string-upcase (substitute #\- #\_ key)) :keyword))