From ca5d3a57de0804997634852ca8d74b4b6307dc4a Mon Sep 17 00:00:00 2001
From: Oliver <oliver.henry.walters@gmail.com>
Date: Sun, 11 Jul 2021 20:49:54 +1000
Subject: [PATCH] Set quantity input parameters based on action

---
 InvenTree/templates/js/forms.js | 10 +++++-----
 InvenTree/templates/js/stock.js | 33 +++++++++++++++++++++++++++++++--
 2 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/InvenTree/templates/js/forms.js b/InvenTree/templates/js/forms.js
index 722db85d1c..f0807bda28 100644
--- a/InvenTree/templates/js/forms.js
+++ b/InvenTree/templates/js/forms.js
@@ -1482,21 +1482,21 @@ function constructInputOptions(name, classes, type, parameters) {
         opts.push(`readonly=''`);
     }
 
-    if (parameters.value) {
+    if (parameters.value != null) {
         // Existing value?
         opts.push(`value='${parameters.value}'`);
-    } else if (parameters.default) {
+    } else if (parameters.default != null) {
         // Otherwise, a defualt value?
         opts.push(`value='${parameters.default}'`);
     }
 
     // Maximum input length
-    if (parameters.max_length) {
+    if (parameters.max_length != null) {
         opts.push(`maxlength='${parameters.max_length}'`);
     }
 
     // Minimum input length
-    if (parameters.min_length) {
+    if (parameters.min_length != null) {
         opts.push(`minlength='${parameters.min_length}'`);
     }
 
@@ -1516,7 +1516,7 @@ function constructInputOptions(name, classes, type, parameters) {
     }
 
     // Placeholder?
-    if (parameters.placeholder) {
+    if (parameters.placeholder != null) {
         opts.push(`placeholder='${parameters.placeholder}'`);
     }
 
diff --git a/InvenTree/templates/js/stock.js b/InvenTree/templates/js/stock.js
index 339b0c4f43..a2be9b4fc0 100644
--- a/InvenTree/templates/js/stock.js
+++ b/InvenTree/templates/js/stock.js
@@ -70,6 +70,33 @@ function adjustStock(items, options={}) {
 
         var pk = item.pk;
 
+        var readonly = (item.serial != null);
+        var minValue = null;
+        var maxValue = null;
+        var value = null;
+
+        switch (options.action) {
+            case 'move':
+                minValue = 0;
+                maxValue = item.quantity;
+                value = item.quantity;
+                break;
+            case 'add':
+                minValue = 0;
+                value = 0;
+                break;
+            case 'take':
+                minValue = 0;
+                value = 0;
+                break;
+            case 'count':
+                minValue = 0;
+                value = item.quantity;
+                break;
+            default:
+                break;
+        }
+
         var image = item.part_detail.thumbnail || item.part_detail.image || blankImage();
 
         var status = stockStatusDisplay(item.status, {
@@ -94,8 +121,10 @@ function adjustStock(items, options={}) {
             actionInput = constructNumberInput(
                 item.pk,
                 {
-                    value: item.quantity,
-                    min_value: 0,
+                    value: value,
+                    min_value: minValue,
+                    max_value: maxValue,
+                    readonly: readonly,
                 }
             )
         };