Add initial implementation of json-records

These behave like normal records, but with an added procedure to convert from a JSON string.

1 files changed, 32 insertions, 9 deletions

diff --git a/lib/zambyte/meta/chibi.scm b/lib/zambyte/meta/chibi.scm
index 812694f..7cc777d 100644
--- a/lib/zambyte/meta/chibi.scm
+++ b/lib/zambyte/meta/chibi.scm
@@ -1,28 +1,51 @@
-(import (chibi json)
+(import (rename (chibi json) (json->string base:json->string))
 	(srfi 1))
 (begin
   (define json-object list)
   (define json-list vector)
-  (define json-null (if #f #f))
-  (define json-object? list?)
+  (define json-null (string->json "null"))
+
+  (define (json-object? obj)
+    (or (list? obj)
+	(json-record? obj)))
+
   (define json-list? vector?)
 
   (define (json-object-contains-key? obj key)
-    (and (assoc key obj) #t))
+    (or (and (list? obj)
+	     (assoc key obj)
+	     #t)
+	(and (json-record? obj)
+	     (json-object-contains-key? (json-record->fields obj) key))))
 
   (define (json-null? obj)
     (eq? obj json-null))
 
   ;; json->string already defined in chibi json
+  (define (json->string json)
+    (if (json-record? json)
+	(json->string (json-record->fields json))
+	(base:json->string json)))
   ;; string->json already defined in chibi json
 
   (define (json-object-ref json key)
-    (let ((pair (assoc key json)))
-      (if pair
-	  (cdr pair)
-	  ((json-key-not-found)))))
+    (cond
+     ((list? json)
+      (let ((pair (assoc key json)))
+	(if pair
+	    (cdr pair)
+	    ((json-key-not-found)))))
+     ((json-record? json)
+      (json-object-ref (json-record->fields json) key))
+     (else (error "json-object-ref: not an object" json))))
 
   (define json-list-ref vector-ref)
   (define json-list-length vector-length)
-  (define json-object->alist values)
+
+  (define (json-object->alist json)
+    (cond
+     ((list? json) json)
+     ((json-record? json) (json-record->fields json))
+     (else (error "json-object->alist: not an object" json))))
+
   (define json-list->list vector->list))