convert path to key, and key to url

pmap.rkt

@@ -213,6 +213,24 @@
   (check-equal? (next-page 'one test-pmap) "two")
   (check-false (next-page 'three test-pmap)))
 
-
-
-
+;; convert path to pmap-key
+;; used for converting "here" values to pmap-keys
+(define/contract (->pmap-key x)
+  (any/c . -> . pmap-key?)
+  (->string (remove-all-ext (last (explode-path (->path x))))))
+
+(module+ test
+  (check-equal? (->pmap-key "bar") "bar")
+  (check-equal? (->pmap-key "foo/bar") "bar")
+  (check-equal? (->pmap-key "foo/bar.html") "bar")
+  (check-equal? (->pmap-key "/Users/this/that/foo/bar.html.pp") "bar"))
+
+
+;; convert key to URL
+;; = key name + suffix of template (or suffix of default template)
+;; todo: finish this function, right now it just appends html
+;; this would also be useful for start page (showing correct url of generated pages)
+(define/contract (pmap-key->url key)
+  (pmap-key? . -> . string?)
+  (string-append key ".html"))
+  

predicates.rkt

@@ -208,9 +208,8 @@
   (define result 
     (or  (eq? x #f) ; OK for map-key to be #f
          (and (or (symbol? x) (string? x)) 
-              (not (= (len x) 0)) ; not empty
-              ; no whitespace
-              (andmap (compose not whitespace?) (map ->string (string->list (->string x)))))))
+              ;; todo: should test be same as valid module name?
+              (->boolean (regexp-match #px"^[-_A-Za-z0-9]+$" (->string x))))))
   (if (and (not result) loud)
       (error "Not a valid pmap key:" x)
       result))
@@ -218,9 +217,10 @@
 (module+ test
   (check-true (pmap-key? #f))
   (check-true (pmap-key? "foo-bar"))
+  (check-true (pmap-key? "Foo_Bar_0123"))
   (check-true (pmap-key? 'foo-bar))
-  ; todo: should this fail?
-  (check-false (pmap-key? "foobar.p"))
+  (check-false (pmap-key? "foo-bar.p"))
+  (check-false (pmap-key? "/Users/MB/foo-bar"))
   (check-false (pmap-key? ""))
   (check-false (pmap-key? " ")))