From e47673ef17e6bbcb4d4a933ad11d057e0029ce21 Mon Sep 17 00:00:00 2001
From: dr-carlos <dr_steven_carlos@outlook.com>
Date: Mon, 25 Jul 2022 15:42:51 +1000
Subject: [PATCH] Add powder input error detection

---
 js/builder_graph.js | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/js/builder_graph.js b/js/builder_graph.js
index 73caa07..f5956a6 100644
--- a/js/builder_graph.js
+++ b/js/builder_graph.js
@@ -445,7 +445,6 @@ class PowderInputNode extends InputNode {
 
     compute_func(input_map) {
         // TODO: haha improve efficiency to O(n) dumb
-        // also, error handling is missing
         let input = this.input_field.value.trim();
         let powdering = [];
         let errorederrors = [];
@@ -453,12 +452,27 @@ class PowderInputNode extends InputNode {
             let first = input.slice(0, 2);
             let powder = powderIDs.get(first);
             if (powder === undefined) {
-                return null;
+                if (first.length > 0)
+                    errorederrors.push(first);
+                else
+                    break;
             } else {
                 powdering.push(powder);
             }
             input = input.slice(2);
         }
+
+        if (this.input_field.getAttribute("placeholder") != null) {
+            let placeholder = this.input_field.getAttribute("placeholder");
+            if (placeholder.includes(" slots") && parseInt(placeholder[0]) < powdering.length)
+                errorederrors.push("Too many powders: " + powdering.length);
+        }
+
+        if (errorederrors.length)
+            this.input_field.classList.add("is-invalid");
+        else
+            this.input_field.classList.remove("is-invalid");
+
         return powdering;
     }
 }