new features

backend/src/services/equipment.service.ts

@@ -132,6 +132,75 @@ class EquipmentService {
     }
   }
 
+  async createCategory(data: { name: string; kurzname: string; sortierung?: number; motorisiert?: boolean }): Promise<AusruestungKategorie> {
+    try {
+      const result = await pool.query(
+        `INSERT INTO ausruestung_kategorien (id, name, kurzname, sortierung, motorisiert)
+         VALUES (uuid_generate_v4(), $1, $2, COALESCE($3, (SELECT COALESCE(MAX(sortierung),0)+1 FROM ausruestung_kategorien)), COALESCE($4, false))
+         RETURNING *`,
+        [data.name, data.kurzname, data.sortierung ?? null, data.motorisiert ?? null]
+      );
+      logger.info('Equipment category created', { id: result.rows[0].id, name: data.name });
+      return result.rows[0] as AusruestungKategorie;
+    } catch (error) {
+      logger.error('EquipmentService.createCategory failed', { error });
+      throw new Error('Failed to create equipment category');
+    }
+  }
+
+  async updateCategory(id: string, data: { name?: string; kurzname?: string; sortierung?: number; motorisiert?: boolean }): Promise<AusruestungKategorie | null> {
+    try {
+      const fields: string[] = [];
+      const values: unknown[] = [];
+      let p = 1;
+
+      if (data.name !== undefined)       { fields.push(`name = $${p++}`);       values.push(data.name); }
+      if (data.kurzname !== undefined)    { fields.push(`kurzname = $${p++}`);    values.push(data.kurzname); }
+      if (data.sortierung !== undefined)  { fields.push(`sortierung = $${p++}`);  values.push(data.sortierung); }
+      if (data.motorisiert !== undefined) { fields.push(`motorisiert = $${p++}`); values.push(data.motorisiert); }
+
+      if (fields.length === 0) throw new Error('No fields to update');
+
+      values.push(id);
+      const result = await pool.query(
+        `UPDATE ausruestung_kategorien SET ${fields.join(', ')} WHERE id = $${p} RETURNING *`,
+        values
+      );
+      if (result.rows.length === 0) return null;
+      logger.info('Equipment category updated', { id });
+      return result.rows[0] as AusruestungKategorie;
+    } catch (error) {
+      logger.error('EquipmentService.updateCategory failed', { error, id });
+      throw error;
+    }
+  }
+
+  async deleteCategory(id: string): Promise<{ deleted: boolean; error?: string }> {
+    try {
+      // Check if any equipment items reference this category
+      const usage = await pool.query(
+        `SELECT COUNT(*) AS cnt FROM ausruestung WHERE kategorie_id = $1 AND deleted_at IS NULL`,
+        [id]
+      );
+      const count = parseInt(usage.rows[0].cnt, 10);
+      if (count > 0) {
+        return { deleted: false, error: `Kategorie wird von ${count} Ausrüstungsgegenständen verwendet und kann nicht gelöscht werden.` };
+      }
+      const result = await pool.query(
+        `DELETE FROM ausruestung_kategorien WHERE id = $1 RETURNING id`,
+        [id]
+      );
+      if (result.rows.length === 0) {
+        return { deleted: false, error: 'Kategorie nicht gefunden' };
+      }
+      logger.info('Equipment category deleted', { id });
+      return { deleted: true };
+    } catch (error) {
+      logger.error('EquipmentService.deleteCategory failed', { error, id });
+      throw new Error('Failed to delete equipment category');
+    }
+  }
+
   // =========================================================================
   // CRUD
   // =========================================================================