From 8b86cbd534f1e5cc2a089d995e6f4f069b832296 Mon Sep 17 00:00:00 2001
From: honzapatCZ <honzapatCZ@email.cz>
Date: Wed, 27 May 2026 22:43:37 +0200
Subject: [PATCH] improve Autocomplete

---
 Form/Core/AutocompleteSelect.js | 60 +++++++++++++++++++++++----------
 1 file changed, 43 insertions(+), 17 deletions(-)

diff --git a/Form/Core/AutocompleteSelect.js b/Form/Core/AutocompleteSelect.js
index bebe77a..376a359 100644
--- a/Form/Core/AutocompleteSelect.js
+++ b/Form/Core/AutocompleteSelect.js
@@ -1,17 +1,35 @@
 import { Combobox } from "@headlessui/react";
 
 import { DropDownItem } from "@shared/nej-react-components/Parts/DropDown";
-import { useEffect, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 
 import tw, { styled } from "twin.macro";
 import "styled-components/macro";
 import { useField } from "@shared/nej-react-components/Parts/Input";
 
-export function AutocompleteSelect({ title, titleProps = null, data, nullable = false, ...props }) {
+/**
+ * @param {object} props
+ * @param {((query: string) => Promise<Array>) | Array} props.data
+ * @param {(val: any, state: { active: boolean, selected: boolean }) => React.ReactNode} [props.renderOption] - Custom renderer for each option. Receives the raw item and combobox state.
+ * @param {() => void} [props.onScrollEnd] - Called when the options list is scrolled to the bottom (for infinite scroll).
+ * @param {(query: string) => void} [props.onQueryChange] - Called when the search input changes. Use this with renderOption to drive server-side filtering.
+ */
+export function AutocompleteSelect({ title, titleProps = null, data, nullable = false, renderOption, onScrollEnd, onQueryChange, ...props }) {
   const [field, meta, helpers] = useField(props);
 
   const [query, setQuery] = useState(field.value ?? "");
   const [internalData, setInternalData] = useState([]);
+  const sentinelRef = useRef(null);
+
+  useEffect(() => {
+    if (!onScrollEnd || !sentinelRef.current) return;
+    const observer = new IntersectionObserver(
+      (entries) => { if (entries[0].isIntersecting) onScrollEnd(); },
+      { threshold: 0.1 }
+    );
+    observer.observe(sentinelRef.current);
+    return () => observer.disconnect();
+  }, [onScrollEnd]);
 
   useEffect(() => {
     (async () => {
@@ -19,16 +37,21 @@ export function AutocompleteSelect({ title, titleProps = null, data, nullable =
         //if data is async function await it
         setInternalData(await data(query));
       } else if (Array.isArray(data)) {
-        setInternalData(
-          query === ""
-            ? data
-            : data.filter((item) => {
-              if (typeof item === "string")
-                return item.toLowerCase().includes(query.toLowerCase());
+        // When renderOption is provided the caller manages filtering externally, just show data as-is
+        if (renderOption) {
+          setInternalData(data);
+        } else {
+          setInternalData(
+            query === ""
+              ? data
+              : data.filter((item) => {
+                if (typeof item === "string")
+                  return item.toLowerCase().includes(query.toLowerCase());
 
-              return item.label.toLowerCase().includes(query.toLowerCase());
-            })
-        );
+                return item.label.toLowerCase().includes(query.toLowerCase());
+              })
+          );
+        }
       } else if(typeof data === "object")
       {
         setInternalData(Object.values(data).map((value) => {
@@ -60,8 +83,9 @@ export function AutocompleteSelect({ title, titleProps = null, data, nullable =
             : null
         }
         onChange={(value) => {
-          console.log(value);
-          field.onChange({ target: { value: value, name: field.name } });
+          // If value is an object (from internalData lookup), store only the primitive .value
+          const stored = value != null && typeof value === "object" ? value.value : value;
+          field.onChange({ target: { value: stored, name: field.name } });
         }}
         nullable={nullable}
       >
@@ -80,7 +104,7 @@ export function AutocompleteSelect({ title, titleProps = null, data, nullable =
           <div tw="relative">
             <Combobox.Input
               tw="bg-primary cursor-pointer appearance-none border-2 border-secondary rounded w-full py-2 px-4 text-primary leading-tight focus:outline-none focus:bg-secondary focus:border-accent transition duration-150 "
-              onChange={(event) => setQuery(event.target.value)}
+              onChange={(event) => { setQuery(event.target.value); onQueryChange?.(event.target.value); }}
               displayValue={(val) => (typeof val === "string" ? val : val?.label)}
             />
             <Combobox.Button tw="absolute top-0 right-0 left-0 bottom-0 " />
@@ -92,11 +116,13 @@ export function AutocompleteSelect({ title, titleProps = null, data, nullable =
                 key={typeof val === "string" ? val : val.value}
                 value={typeof val === "string" ? val : val.value}
               >
-                <DropDownItem>
-                  {typeof val === "string" ? val : val.label}
-                </DropDownItem>
+                {renderOption
+                  ? (state) => renderOption(val, state)
+                  : <DropDownItem>{typeof val === "string" ? val : val.label}</DropDownItem>
+                }
               </Combobox.Option>
             ))}
+            {onScrollEnd && <div ref={sentinelRef} />}
           </Combobox.Options>
         </div>
       </Combobox>