feat(frontend): add /documents page.server.ts — search load function with all filter params

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/documents/+page.server.ts

@@ -0,0 +1,91 @@
+import { redirect } from '@sveltejs/kit';
+import { createApiClient } from '$lib/api.server';
+import type { components } from '$lib/generated/api';
+
+type DocumentSearchItem = components['schemas']['DocumentSearchItem'];
+
+const VALID_SORTS = ['DATE', 'TITLE', 'SENDER', 'RECEIVER', 'UPLOAD_DATE', 'RELEVANCE'] as const;
+type ValidSort = (typeof VALID_SORTS)[number];
+const VALID_DIRS = ['asc', 'desc'] as const;
+type ValidDir = (typeof VALID_DIRS)[number];
+
+export async function load({ url, fetch }) {
+	const q = url.searchParams.get('q') || '';
+	const from = url.searchParams.get('from') || '';
+	const to = url.searchParams.get('to') || '';
+	const senderId = url.searchParams.get('senderId') || '';
+	const receiverId = url.searchParams.get('receiverId') || '';
+	const tags = url.searchParams.getAll('tag');
+	const rawSort = url.searchParams.get('sort') ?? 'DATE';
+	const sort: ValidSort = (VALID_SORTS as readonly string[]).includes(rawSort)
+		? (rawSort as ValidSort)
+		: 'DATE';
+	const rawDir = url.searchParams.get('dir') ?? 'desc';
+	const dir: ValidDir = (VALID_DIRS as readonly string[]).includes(rawDir)
+		? (rawDir as ValidDir)
+		: 'desc';
+	const tagQ = url.searchParams.get('tagQ') || '';
+	const tagOp = url.searchParams.get('tagOp') === 'OR' ? 'OR' : 'AND';
+
+	const api = createApiClient(fetch);
+
+	try {
+		const result = await api.GET('/api/documents/search', {
+			params: {
+				query: {
+					q: q || undefined,
+					from: from || undefined,
+					to: to || undefined,
+					senderId: senderId || undefined,
+					receiverId: receiverId || undefined,
+					tag: tags.length ? tags : undefined,
+					tagQ: tagQ && !tags.length ? tagQ : undefined,
+					tagOp: tagOp === 'OR' ? 'OR' : undefined,
+					sort,
+					dir: dir || undefined
+				}
+			}
+		});
+
+		if (result.response.status === 401) {
+			throw redirect(302, '/login');
+		}
+
+		const items: DocumentSearchItem[] = (result.data?.items ?? []) as DocumentSearchItem[];
+		const total: number = result.data?.total ?? 0;
+
+		return {
+			items,
+			total,
+			q,
+			from,
+			to,
+			senderId,
+			receiverId,
+			tags,
+			sort,
+			dir,
+			tagQ,
+			tagOp,
+			error: null as string | null
+		};
+	} catch (e) {
+		if ((e as { status?: number }).status) throw e;
+		console.error('Error loading documents:', e);
+		return {
+			items: [] as DocumentSearchItem[],
+			total: 0,
+			q,
+			from,
+			to,
+			senderId,
+			receiverId,
+			tags,
+			sort,
+			dir,
+			tagQ,
+			tagOp,
+			error: 'Daten konnten nicht geladen werden.' as string | null
+		};
+	}
+}