Add customergroup sort with bulk order and locked implicit names.

Reorder via customergroup.order (exact id list → sort 0…n-1); block renaming POS/Lieferanten while still allowing create/update of other groups by name.

src/store/customergroup/create.js

@@ -1,6 +1,13 @@
-import { CREATE } from '../../sql/customergroup.js';
+import { CREATE, GET_NEXT_SORT } from '../../sql/customergroup.js';
+import { POS_GROUP_NAME, SUPPLIER_GROUP_NAME } from '../../sql/entity.js';
 import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
 
+const RESERVED_NAMES = new Set([POS_GROUP_NAME, SUPPLIER_GROUP_NAME]);
+
+function shape(row) {
+  return { id: row.id, name: row.name, sort: row.sort };
+}
+
 export default function create(pool) {
   const access = resolveCompanyAccess(pool);
 
@@ -9,16 +16,25 @@ export default function create(pool) {
     if (!cleaned) {
       throw new Error('Name required');
     }
+    if (RESERVED_NAMES.has(cleaned)) {
+      throw new Error('Name not allowed');
+    }
 
     await access(googleAuthId, companyId);
 
+    const next = await pool
+      .request()
+      .input('companyId', companyId)
+      .query(GET_NEXT_SORT);
+    const sort = next.recordset[0].sort;
+
     const result = await pool
       .request()
       .input('companyId', companyId)
       .input('name', cleaned)
+      .input('sort', sort)
       .query(CREATE);
 
-    const row = result.recordset[0];
-    return { id: row.id, name: row.name };
+    return shape(result.recordset[0]);
   };
 }

src/store/customergroup/list.js

@@ -15,6 +15,7 @@ export default function list(pool) {
     return result.recordset.map((row) => ({
       id: row.id,
       name: row.name,
+      sort: row.sort,
     }));
   };
 }

src/store/customergroup/order.js

@@ -0,0 +1,65 @@
+import {
+  LIST_IDS_BY_COMPANY,
+  UPDATE_SORT,
+} from '../../sql/customergroup.js';
+import request from '../request.js';
+import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
+
+export default function order(pool) {
+  const access = resolveCompanyAccess(pool);
+
+  return async (googleAuthId, companyId, { customergroupIds } = {}) => {
+    if (!Array.isArray(customergroupIds)) {
+      throw new Error('Invalid customer group order');
+    }
+
+    await access(googleAuthId, companyId);
+
+    const groups = await pool
+      .request()
+      .input('companyId', companyId)
+      .query(LIST_IDS_BY_COMPANY);
+
+    const existing = new Set(groups.recordset.map((r) => r.id));
+
+    if (customergroupIds.length !== existing.size) {
+      throw new Error('Invalid customer group order');
+    }
+
+    const seen = new Set();
+    for (const customergroupId of customergroupIds) {
+      if (
+        !Number.isFinite(customergroupId) ||
+        !existing.has(customergroupId) ||
+        seen.has(customergroupId)
+      ) {
+        throw new Error('Invalid customer group order');
+      }
+      seen.add(customergroupId);
+    }
+
+    const tx = pool.transaction();
+    await tx.begin();
+
+    try {
+      for (let sort = 0; sort < customergroupIds.length; sort++) {
+        await request(pool, tx)
+          .input('id', customergroupIds[sort])
+          .input('companyId', companyId)
+          .input('sort', sort)
+          .query(UPDATE_SORT);
+      }
+
+      await tx.commit();
+
+      return { customergroupIds };
+    } catch (err) {
+      try {
+        await tx.rollback();
+      } catch {
+        // ignore
+      }
+      throw err;
+    }
+  };
+}

src/store/customergroup/update.js

@@ -1,6 +1,13 @@
-import { UPDATE_NAME } from '../../sql/customergroup.js';
+import { GET_BY_COMPANY_AND_ID, UPDATE } from '../../sql/customergroup.js';
+import { POS_GROUP_NAME, SUPPLIER_GROUP_NAME } from '../../sql/entity.js';
 import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
 
+const LOCKED_NAMES = new Set([POS_GROUP_NAME, SUPPLIER_GROUP_NAME]);
+
+function shape(row) {
+  return { id: row.id, name: row.name, sort: row.sort };
+}
+
 export default function update(pool) {
   const access = resolveCompanyAccess(pool);
 
@@ -9,24 +16,39 @@ export default function update(pool) {
       throw new Error('Customer group not found');
     }
 
-    const cleaned = name?.trim();
+    const cleaned = name?.trim?.() ? name.trim() : null;
     if (!cleaned) {
       throw new Error('Name required');
     }
 
     await access(googleAuthId, companyId);
 
+    const existing = await pool
+      .request()
+      .input('id', id)
+      .input('companyId', companyId)
+      .query(GET_BY_COMPANY_AND_ID);
+
+    const current = existing.recordset[0];
+    if (!current) {
+      throw new Error('Customer group not found');
+    }
+
+    if (LOCKED_NAMES.has(current.name) && cleaned !== current.name) {
+      throw new Error('Name cannot be changed');
+    }
+
     const result = await pool
       .request()
       .input('id', id)
       .input('companyId', companyId)
       .input('name', cleaned)
-      .query(UPDATE_NAME);
+      .query(UPDATE);
 
     const row = result.recordset[0];
     if (!row) {
       throw new Error('Customer group not found');
     }
-    return { id: row.id, name: row.name };
+    return shape(row);
   };
 }