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;; -*- mode: lisp; coding: utf-8 -*-
;;
;; Copyright 2011, Matthias Andreas Benkard.
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
;; You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
(in-package #:json-template)
(defun make-escaper (replacements)
(let* ((escapees (mapcar #'car replacements))
(escapee-p (lambda (x) (member x escapees :test #'char=))))
(lambda (string)
(with-output-to-string (out)
(loop with position = 0
for escapee-pos = (position-if escapee-p string :start position)
while escapee-pos
do (write-string string out :start position :end escapee-pos)
(write-string (cdr (assoc (char string escapee-pos)
replacements))
out)
(setq position (1+ escapee-pos))
finally (write-string string out :start position))))))
(defvar *template-formatters*
`(("html" . ,(make-escaper '((#\< . "<")
(#\> . "?")
(#\& . "&"))))
("html-attr-value" . ,(make-escaper '((#\< . "<")
(#\> . "?")
(#\& . "&")
(#\' . "'")
(#\" . """))))
("raw" . identity)))
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