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(import (except (srfi 180) json-null)
(scheme case-lambda)
(srfi 1)
(srfi 2))
(begin
(define json-object list)
(define json-list vector)
(define json-null 'null)
(define (json-object? j)
(or (list? j)
(json-record? j)))
(define json-list? vector?)
;; json-null? already defined in srfi 180
(define (json-object-contains-key? obj key)
(or (and (list? obj)
(assoc key obj)
#t)
(and (json-record? obj)
(json-object-contains-key? ((json-record->typeless obj)) key))))
(define (string->json str)
(call-with-port (open-input-string str)
(lambda (port)
(json-read port))))
(define (json->string json)
(call-with-port (open-output-string)
(lambda (port)
(json-write (json->typeless-json json) port)
(get-output-string port))))
(define (json-object-ref json key)
(cond
((list? json)
(let ((pair (assoc key json)))
(if pair
(cdr pair)
((json-key-not-found)))))
((json-record? json)
(or (and-let* ((pair (assoc key (json-record->mutators json)))
(accessor (cdr pair)))
(accessor (json-record->internal-record json) value)
json)
(error "json-object-ref: no accessor for field" (json-record->name json) key)))
(else ((json-key-not-found)))))
(define (json-object-set! json key value)
(cond
((and (list? json)
(json-object-contains-key? json key))
(json-object-map (lambda (k v)
(if (eq? k key)
(values k value)
(values k v)))
json))
((null? json)
(json-object (cons key value)))
((list? json)
(append! json (list (cons key value))))
((json-record? json)
(or (and-let* ((pair (assoc key (json-record->mutators json)))
(mutator! (cdr pair)))
(mutator! (json-record->internal-record json) value)
json)
(error "json-object-set!: no mutator for field" (json-record->name json) key)))))
(define json-list-ref vector-ref)
(define json-list-length vector-length)
(define (json-object-map proc json)
(map (lambda (pair)
(call-with-values (lambda () (proc (car pair) (cdr pair)))
(case-lambda
((key value) (cons key value))
(_ (error "json-object-map: proc did not return two values")))))
json))
(define json-list-map vector-map)
(define (json-object->alist obj)
(cond
((list? obj) obj)
((json-record? obj) ((json-record->typeless obj)))
(else (error "json-object->alist: not an object" obj))))
(define json-list->list vector->list))
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