Decouple core Yaak logic from Tauri (#354)

crates/yaak-sync/index.ts

@@ -0,0 +1,84 @@
+import { Channel, invoke } from '@tauri-apps/api/core';
+import { emit } from '@tauri-apps/api/event';
+import type { WatchResult } from '@yaakapp-internal/tauri';
+import { SyncOp } from './bindings/gen_sync';
+import { WatchEvent } from './bindings/gen_watch';
+
+export * from './bindings/gen_models';
+
+export async function calculateSync(workspaceId: string, syncDir: string) {
+  return invoke<SyncOp[]>('cmd_sync_calculate', {
+    workspaceId,
+    syncDir,
+  });
+}
+
+export async function calculateSyncFsOnly(dir: string) {
+  return invoke<SyncOp[]>('cmd_sync_calculate_fs', { dir });
+}
+
+export async function applySync(workspaceId: string, syncDir: string, syncOps: SyncOp[]) {
+  return invoke<void>('cmd_sync_apply', {
+    workspaceId,
+    syncDir,
+    syncOps: syncOps,
+  });
+}
+
+export function watchWorkspaceFiles(
+  workspaceId: string,
+  syncDir: string,
+  callback: (e: WatchEvent) => void,
+) {
+  console.log('Watching workspace files', workspaceId, syncDir);
+  const channel = new Channel<WatchEvent>();
+  channel.onmessage = callback;
+  const unlistenPromise = invoke<WatchResult>('cmd_sync_watch', {
+    workspaceId,
+    syncDir,
+    channel,
+  });
+
+  unlistenPromise.then(({ unlistenEvent }) => {
+    addWatchKey(unlistenEvent);
+  });
+
+  return () =>
+    unlistenPromise
+      .then(async ({ unlistenEvent }) => {
+        console.log('Unwatching workspace files', workspaceId, syncDir);
+        unlistenToWatcher(unlistenEvent);
+      })
+      .catch(console.error);
+}
+
+function unlistenToWatcher(unlistenEvent: string) {
+  emit(unlistenEvent).then(() => {
+    removeWatchKey(unlistenEvent);
+  });
+}
+
+function getWatchKeys() {
+  return sessionStorage.getItem('workspace-file-watchers')?.split(',').filter(Boolean) ?? [];
+}
+
+function setWatchKeys(keys: string[]) {
+  sessionStorage.setItem('workspace-file-watchers', keys.join(','));
+}
+
+function addWatchKey(key: string) {
+  const keys = getWatchKeys();
+  setWatchKeys([...keys, key]);
+}
+
+function removeWatchKey(key: string) {
+  const keys = getWatchKeys();
+  setWatchKeys(keys.filter((k) => k !== key));
+}
+
+// On page load, unlisten to all zombie watchers
+const keys = getWatchKeys();
+if (keys.length > 0) {
+  console.log('Unsubscribing to zombie file watchers', keys);
+  keys.forEach(unlistenToWatcher);
+}