From 83f73108423b9fd11ebfc1dcf8f5095f8e9ff35d Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sat, 9 Aug 2014 22:42:58 -0400
Subject: Create utility module.

* guix-web/server.scm (file-extension, directory?,
  request-path-components): Delete them.
* guix-web/util.scm: New module.
---
 guix-web/server.scm | 11 ++---------
 guix-web/util.scm   | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 9 deletions(-)
 create mode 100644 guix-web/util.scm

diff --git a/guix-web/server.scm b/guix-web/server.scm
index 49c6a07..af9f9dc 100644
--- a/guix-web/server.scm
+++ b/guix-web/server.scm
@@ -17,6 +17,7 @@
 
 (define-module (guix-web server)
   #:use-module (ice-9 binary-ports)
+  #:use-module (ice-9 match)
   #:use-module (srfi srfi-1)
   #:use-module (web http)
   #:use-module (web request)
@@ -25,22 +26,14 @@
   #:use-module (guix-web config)
   #:use-module (guix-web controller)
   #:use-module (guix-web render)
+  #:use-module (guix-web util)
   #:export (start-guix-web))
 
-(define (file-extension file-name)
-  (last (string-split file-name #\.)))
-
-(define (directory? filename)
-  (string=? filename (dirname filename)))
-
 (define file-mime-types
   '(("css" . (text/css))
     ("js" . (text/javascript))
     ("png" . (image/png))))
 
-(define (request-path-components request)
-  (split-and-decode-uri-path (uri-path (request-uri request))))
-
 (define (serve-static-asset request)
   (let ((filename (string-join
                    (cons guix-web-asset-dir
diff --git a/guix-web/util.scm b/guix-web/util.scm
new file mode 100644
index 0000000..f99eed5
--- /dev/null
+++ b/guix-web/util.scm
@@ -0,0 +1,43 @@
+;;; guix-web - Web interface for GNU Guix
+;;; Copyright © 2014  David Thompson <davet@gnu.org>
+;;;
+;;; This program is free software: you can redistribute it and/or
+;;; modify it under the terms of the GNU Affero General Public License
+;;; as published by the Free Software Foundation, either version 3 of
+;;; the License, or (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; Affero General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Affero General Public
+;;; License along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (guix-web util)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-1)
+  #:use-module (web request)
+  #:use-module (web uri)
+  #:export (parse-query-string
+            request-path-components
+            file-extension
+            directory?))
+
+(define (parse-query-string query)
+  "Parse and decode the URI query string QUERY and return an alist."
+  (let lp ((lst (map uri-decode (string-split query (char-set #\& #\=)))))
+    (match lst
+      ((key value . rest)
+       (cons (cons key value) (lp rest)))
+      (() '()))))
+
+(define (request-path-components request)
+  (split-and-decode-uri-path (uri-path (request-uri request))))
+
+(define (file-extension file-name)
+  (last (string-split file-name #\.)))
+
+(define (directory? filename)
+  (string=? filename (dirname filename)))
-- 
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