search update

docs/api/routes/article/search.md

@@ -2,7 +2,7 @@
 
 Protected. Requires a valid session cookie (`credentials: 'include'`).
 
-Fuzzy article search against JTL-Wawi (MSSQL). Use this to build a search box / result list.
+Fuzzy article search. Use this to build a search box / result list with category facets.
 
 ## Query parameters
 
@@ -10,14 +10,17 @@ Fuzzy article search against JTL-Wawi (MSSQL). Use this to build a search box /
 |-------|----------|-------------|
 | `target` | yes | Search string. Split on spaces; each word must match (AND). Each word is matched with `LIKE %word%` against EAN, supplier article number, name, article number, or barcode. |
 | `filter` | no | Comma-separated category IDs. Omit or leave empty to search all categories. See [Category filter](#category-filter). |
+| `offset` | no | Pagination offset (default `0`). |
+| `maxCount` | no | Page size (default `10`). |
 
 ## Search behaviour
 
 - Multiple spaces are collapsed to one.
 - Example: `target=bizz allmix` → both `bizz` **and** `allmix` must match somewhere on the article.
 - By default only **active** articles (`cAktiv = 'Y'`) are returned.
-- Without a category filter, at most **2000** rows are returned.
+- Without a category filter, at most **2000** rows are returned (before pagination).
 - Results are ordered by product name ascending.
+- `length` is the total match count (before `offset` / `maxCount`); `recordset` is the current page.
 
 ## Category filter
 
@@ -29,57 +32,74 @@ Fuzzy article search against JTL-Wawi (MSSQL). Use this to build a search box /
 
 Pass category IDs as a comma-separated list: `filter=16,39`.
 
+Whenever `filter` is present, **`categories` always includes every id from `filter`**, even when `length` is `0` or a filtered id has no hits. Those entries use master-data `name` / `parent` and may have `count: 0`. Other facet categories with hits are still returned as usual.
+
 ## Response `200`
 
 ```json
 {
-  "katagg": {
+  "length": 42,
-    "16": 12,
-    "39": 8
-  },
   "recordset": [
     {
-      "katList": "16,39",
+      "categories": "16,39",
-      "fVerfuegbar": 0,
+      "available": 0,
-      "kArtikel": 49,
+      "id": 49,
-      "fBestand": null,
+      "stock": null,
-      "cArtNr": "42000044",
+      "sku": "42000044",
-      "cName": "BioBizz AllMix Peat Free 20L",
+      "name": "BioBizz AllMix Peat Free 20L",
-      "fVKNEtto": 11.3445378151261,
+      "price": 13.5,
-      "kSteuerklasse": 1
+      "tax": 19
     }
-  ]
+  ],
+  "categories": {
+    "16": { "name": "Dünger", "count": 42, "parent": 0 },
+    "39": { "name": "Erde", "count": 18, "parent": 16 }
+  }
 }
 ```
 
+Empty result with an active filter still returns the applied category:
+
+```json
+{
+  "length": 0,
+  "recordset": [],
+  "categories": {
+    "16": { "name": "Dünger", "count": 0, "parent": 0 }
+  }
+}
+```
+
+### Top-level fields
+
+| Field | Type | Notes |
+|-------|------|-------|
+| `length` | number | Total matching articles (unpaginated). |
+| `recordset` | array | Current page of shaped article rows. |
+| `categories` | object | Map keyed by category id (string). Facet counts for the current search (+ filters). |
+
 ### `recordset[]` fields
 
 | Field | Type | Notes |
 |-------|------|-------|
-| `kArtikel` | number | Internal article ID |
+| `id` | number | Internal article ID (`kArtikel`) |
-| `cArtNr` | string | Article number — pass to [`GET /article/get`](get.md) |
+| `sku` | string | Article number — pass to [`GET /article/get`](get.md) |
-| `cName` | string | Display name |
+| `name` | string | Display name |
-| `fBestand` | number \| null | Stock in warehouse 1 |
+| `stock` | number \| null | Stock in warehouse 1 |
-| `fVerfuegbar` | number \| null | Available stock |
+| `available` | number \| null | Available stock |
-| `fVKNEtto` | number | Net sales price |
+| `price` | number \| null | Brutto VK, rounded to 1 decimal |
-| `kSteuerklasse` | number | Tax class: `1` = 19%, `2` = 7%, `3` = 0% |
+| `tax` | number \| null | Tax rate percent for the article’s Steuerklasse |
-| `katList` | string \| null | Comma-separated category IDs on the article |
+| `categories` | string \| null | Comma-separated category IDs on the article |
 
-### `katagg`
+### `categories` map entries
 
-Map of category ID → count of matching articles in that category (including parent categories in the tree). Use for category sidebar / facet counts.
+| Field | Type | Notes |
+|-------|------|-------|
+| `name` | string \| null | Display label from category master data |
+| `count` | number | Hit count under the current search (+ other filters); may be `0` |
+| `parent` | number \| null | Parent category id, or `0` if root |
 
-### Display price (frontend)
+Counts include parent categories rolled up from each article’s category path. Use for category sidebar / facet UI. Resolve labels via `categories[id].name` (skip ids without a name).
-
-Brutto VK is not returned; compute client-side using [`GET /misc/getSteuer`](../misc/getSteuer.md):
-
-```js
-function getBrutto(netto, kSteuerklasse, steuerklassen) {
-  const row = steuerklassen.find((s) => s.kSteuerklasse === kSteuerklasse);
-  if (!row) return null;
-  return netto * (1 + row.fSteuersatz / 100);
-}
-```
 
 ## Errors
 
@@ -93,8 +113,8 @@ function getBrutto(netto, kSteuerklasse, steuerklassen) {
 
 ```js
 const res = await fetch(
-  'http://localhost:4208/api/article/search?target=bizz%20allmix',
+  'http://localhost:4208/api/article/search?target=bizz%20allmix&filter=16&maxCount=10',
   { credentials: 'include' }
 );
-const { katagg, recordset } = await res.json();
+const { categories, length, recordset } = await res.json();
 ```

src/services/article/searchArticles.js

@@ -77,6 +77,22 @@ function shapeCategories(counts, byId) {
     return categories;
 }
 
+/** Ensure every applied filter id appears in categories (count 0 if no hits). */
+function ensureFilterCategories(categories, filter, byId) {
+    for (const id of filter) {
+        if (id === '' || id === null || categories[id]) {
+            continue;
+        }
+        const meta = byId[id] ?? {};
+        categories[id] = {
+            count: 0,
+            name: meta.name ?? null,
+            parent: meta.parent ?? null,
+        };
+    }
+    return categories;
+}
+
 function shapeArticle(row, steuersaetze) {
     const taxRow = steuersaetze.find((item) => item.kSteuerklasse === row.kSteuerklasse);
     const brutto = bruttoFromNetto(row.fVKNEtto, row.kSteuerklasse, steuersaetze);
@@ -184,8 +200,12 @@ export async function searchArticles(target, filter = [''], offset = 0, maxCount
         loadCategoryCache(pool),
         loadSteuersatz(),
     ]);
-    const categories = shapeCategories(
+    const categories = ensureFilterCategories(
-        buildKatAgg(result.recordset, categoryData.parentMap),
+        shapeCategories(
+            buildKatAgg(result.recordset, categoryData.parentMap),
+            categoryData.byId
+        ),
+        filter,
         categoryData.byId
     );
     const length = result.recordset.length;