feat: Crumbs by Bretzel — self-hostable notes app MVP

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

src/lib/sync/server.ts

@@ -0,0 +1,71 @@
+import { db } from '$lib/server/db/index.js';
+import { notes, syncLog } from '$lib/server/db/schema.js';
+import { eq, gt } from 'drizzle-orm';
+import type { SyncQueueItem } from './idb.js';
+
+/**
+ * Process incoming sync changes from client.
+ */
+export async function processSyncPush(changes: SyncQueueItem[]): Promise<void> {
+	for (const change of changes) {
+		switch (change.operation) {
+			case 'create':
+			case 'update': {
+				if (!change.data) continue;
+				const existing = await db.select().from(notes).where(eq(notes.id, change.noteId)).get();
+
+				if (existing) {
+					// LWW: only update if incoming timestamp is newer
+					if (change.timestamp > existing.updatedAt.getTime()) {
+						await db
+							.update(notes)
+							.set({
+								...change.data,
+								updatedAt: new Date(change.timestamp),
+								version: existing.version + 1
+							})
+							.where(eq(notes.id, change.noteId));
+					}
+				} else if (change.operation === 'create' && change.data) {
+					await db.insert(notes).values({
+						id: change.noteId,
+						title: change.data.title || '',
+						content: change.data.content || '',
+						color: change.data.color || 'default',
+						pinned: change.data.pinned || false,
+						archived: change.data.archived || false,
+						trashed: change.data.trashed || false,
+						checklistMode: change.data.checklistMode || false,
+						sortOrder: change.data.sortOrder || 0,
+						createdAt: new Date(change.timestamp),
+						updatedAt: new Date(change.timestamp),
+						version: 1
+					});
+				}
+				break;
+			}
+			case 'delete': {
+				await db.delete(notes).where(eq(notes.id, change.noteId));
+				break;
+			}
+		}
+
+		// Log sync operation
+		await db.insert(syncLog).values({
+			noteId: change.noteId,
+			operation: change.operation,
+			timestamp: new Date(change.timestamp),
+			clientId: 'default'
+		});
+	}
+}
+
+/**
+ * Get all notes updated since a given timestamp.
+ */
+export async function getChangesSince(sinceTimestamp: number) {
+	const since = new Date(sinceTimestamp);
+	const allNotes = await db.select().from(notes);
+	// Filter notes updated after the timestamp
+	return allNotes.filter((n) => n.updatedAt > since);
+}