From c2bbc518842ec1afe9f13a16d89c514ee4da80b1 Mon Sep 17 00:00:00 2001
From: David Florness <david@florness.com>
Date: Sat, 7 Mar 2020 15:27:19 -0700
Subject: [PATCH] The client now supports voting in multiple elections

---
 client.rkt | 62 ++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 39 insertions(+), 23 deletions(-)

diff --git a/client.rkt b/client.rkt
index bd56619..3798108 100644
--- a/client.rkt
+++ b/client.rkt
@@ -53,35 +53,17 @@
   (let loop ([wait 0])
     (sleep wait)
     (with-handlers ([exn:fail:network:http:error?
-                     (λ (exn)
+                     (λ (ex)
                        (break-enabled #t)
                        (display ".")
                        (flush-output)
                        (loop 3))])
       f)))
 
-(module+ main
-  (define point (gen))
-
-  (define bulletin
-    (update-port (update-host json-requester "localhost") 1984))
-
-  (define token
-    (let ([username (readline "Username: ")]
-          [password (get-pass "Password: ")])
-      (with-handlers ([exn:fail:network:http:error?
-                       (λ ([ex : exn:fail:network:http:error])
-                         (newline)
-                         (displayln (format "Login refused: ~a"
-                                            (exn-message ex)))
-                         (exit))])
-        (json-response-body
-         (post bulletin "/register"
-               #:data
-               (jsexpr->string (hasheq 'input (integer->hex-string point)
-                                       'username username
-                                       'password password)))))))
-
+(define (vote-in-election
+         [point    : Integer]
+         [bulletin : requester]
+         [token    : JSExpr])
   (displayln "retrieving candidates...")
   (define candidates (cast (json-response-body
                             (retry-request (get bulletin "/candidates")))
@@ -308,3 +290,37 @@
         [rank rankings])
     (for ([r rank])
       (displayln (format "~a) ~a" i (list-ref candidates r))))))
+
+(module+ main
+  (define point (gen))
+
+  (define bulletin
+    (update-port (update-host json-requester "localhost") 1984))
+
+  (define token
+    (let ([username (readline "Username: ")]
+          [password (get-pass "Password: ")])
+      (with-handlers ([exn:fail:network:http:error?
+                       (λ ([ex : exn:fail:network:http:error])
+                         (newline)
+                         (displayln (format "Login refused: ~a"
+                                            (exn-message ex)))
+                         (exit))])
+        (json-response-body
+         (post bulletin "/register"
+               #:data
+               (jsexpr->string (hasheq 'input (integer->hex-string point)
+                                       'username username
+                                       'password password)))))))
+
+  ; the bulletin can have multiple elections
+  (let loop ()
+    (with-handlers ([exn:fail?
+                     (λ ([ex : exn:fail])
+                       (displayln (exn-message ex))
+                       (displayln
+                        "Assuming election was cancelled; starting over")
+                       (break-enabled #t)
+                       (loop))])
+      (vote-in-election point bulletin token))
+    (loop)))
-- 
2.38.4