[Init] Initial commit - NetMesh terminal manager

application/state/sftp/sftpHostViewModeStore.ts

@@ -0,0 +1,70 @@
+import { useCallback, useSyncExternalStore } from "react";
+import { localStorageAdapter } from "../../../infrastructure/persistence/localStorageAdapter";
+import { STORAGE_KEY_SFTP_HOST_VIEW_MODES } from "../../../infrastructure/config/storageKeys";
+
+// ── Shared external store for per-host SFTP view mode preferences ──
+
+type ViewMode = 'list' | 'tree';
+type Listener = () => void;
+
+const listeners = new Set<Listener>();
+
+let snapshot: Record<string, ViewMode> =
+    localStorageAdapter.read<Record<string, ViewMode>>(STORAGE_KEY_SFTP_HOST_VIEW_MODES) ?? {};
+
+function subscribe(listener: Listener) {
+    listeners.add(listener);
+    return () => { listeners.delete(listener); };
+}
+
+function getSnapshot() {
+    return snapshot;
+}
+
+function persist(next: Record<string, ViewMode>) {
+    snapshot = next;
+    localStorageAdapter.write(STORAGE_KEY_SFTP_HOST_VIEW_MODES, snapshot);
+    for (const l of listeners) l();
+}
+
+// Sync across windows/tabs via storage events
+if (typeof window !== 'undefined') {
+    window.addEventListener('storage', (e) => {
+        if (e.key !== STORAGE_KEY_SFTP_HOST_VIEW_MODES) return;
+        try {
+            snapshot = e.newValue
+                ? (JSON.parse(e.newValue) as Record<string, ViewMode>)
+                : {};
+        } catch {
+            snapshot = {};
+        }
+        for (const l of listeners) l();
+    });
+}
+
+/** Get the saved view mode for a specific host, or null if none saved. */
+export function getHostViewMode(hostId: string): ViewMode | null {
+    return snapshot[hostId] ?? null;
+}
+
+/** Save the view mode preference for a specific host. */
+export function setHostViewMode(hostId: string, mode: ViewMode): void {
+    if (snapshot[hostId] === mode) return;
+    persist({ ...snapshot, [hostId]: mode });
+}
+
+// ── Hook ──
+
+export function useSftpHostViewMode(hostId: string | undefined) {
+    const store = useSyncExternalStore(subscribe, getSnapshot, getSnapshot);
+
+    const mode: ViewMode | null = hostId ? (store[hostId] ?? null) : null;
+
+    const setMode = useCallback((newMode: ViewMode) => {
+        if (hostId) {
+            setHostViewMode(hostId, newMode);
+        }
+    }, [hostId]);
+
+    return { hostViewMode: mode, setHostViewMode: setMode };
+}