From 86b5343292e852155dab10fc8db39c2dd2b932eb Mon Sep 17 00:00:00 2001
From: Marius Peter <dev@marius-peter.com>
Date: Tue, 21 Oct 2025 21:36:09 +0200
Subject: Added views, formlets, and handlers for nutrient target management.

---
 views.rkt | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)

(limited to 'views.rkt')

diff --git a/views.rkt b/views.rkt
index d78c370..12b5d1a 100644
--- a/views.rkt
+++ b/views.rkt
@@ -2,12 +2,14 @@
 
 (provide index-page
          new-measurement-page
+         new-target-page
          fallback-page)
 
 (require web-server/formlets
          "formlets.rkt"
          "models/nutrient.rkt"
-         "models/nutrient-measurement.rkt")
+         "models/nutrient-measurement.rkt"
+         "models/nutrient-target.rkt")
 
 
 (define (page-template title body-xexpr)
@@ -77,19 +79,26 @@
      (a ([class "btn btn-primary mb-3"] [href "/target/new"]) "Créer une cible")
      (table ([class "table"])
             (tr (th "Nutriment")
-                (th ([class "text-end"]) "Dernière Cible")
                 (th ([class "text-end"]) "Dernier Relevé")
+                (th ([class "text-end"]) "Dernière Cible")
                 (th ([class "text-end"]) "Delta (%)"))
             ,@(for/list ([n (get-nutrients)])
-                (define latest-target (+ (get-latest-nutrient-measurement-value n) 1))
-                (define latest-value (get-latest-nutrient-measurement-value n))
-                (define delta (* 100
-                                 (/ (- latest-target latest-value)
-                                    latest-target)))
+                (define latest-target (get-latest-nutrient-target-value n))
+                (define latest-measurement (get-latest-nutrient-measurement-value n))
+                (define delta-percentage (cond
+                                           [(zero? latest-target)
+                                            -100]
+                                           [(zero? latest-measurement)
+                                            100]
+                                           [(number? latest-target)
+                                            (* 100
+                                               (/ (- latest-target latest-measurement)
+                                                  latest-measurement))]
+                                           [else #f]))
                 `(tr (td ,(nutrient-name n))
-                     (td ([class "text-end"]) ,(round 2 latest-target))
-                     (td ([class "text-end"]) ,(round 2 latest-value))
-                     (td ([class "text-end"]) ,(round 1 delta)))))
+                     (td ([class "text-end"]) ,(if latest-measurement (round 2 latest-measurement) "—"))
+                     (td ([class "text-end"]) ,(if latest-target (round 2 latest-target) "—"))
+                     (td ([class "text-end"]) ,(if delta-percentage (round 1 delta-percentage) "—")))))
 
      (a ([class "btn btn-primary mb-3"] [href "/measurement/new"]) "Ajouter un relevé")
      (table ([class "table table-striped"])
@@ -122,6 +131,16 @@
             [method "POST"])
            ,@(formlet-display (measurements-formlet)))))))
 
+(define (new-target-page)
+  (page-template
+   "Nouvelle cible"
+   `((h1 ([class "display-1 mb-3"]) "Nouvelle cible")
+     (div ([class "mb-3"] [style "max-width: 30em"])
+          (form
+           ([action "/target/create"]
+            [method "POST"])
+           ,@(formlet-display (targets-formlet)))))))
+
 (define (fallback-page request-code)
   (page-template
    (format "Réponse: ~a" request-code)
-- 
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