refactor(router): introduce app navigation manager

src/app/chat/hooks/use-chat-unlock-navigation-flow.ts

@@ -1,21 +1,17 @@
 "use client";
 
 import { useEffect } from "react";
-import { useRouter } from "next/navigation";
 
-import { ROUTE_BUILDERS } from "@/router/routes";
-import { useAuthState } from "@/stores/auth/auth-context";
-import { useChatDispatch, useChatState } from "@/stores/chat/chat-context";
-import type { ChatUnlockPaywallRequest } from "@/stores/chat/chat-state";
-import { useUserState } from "@/stores/user/user-context";
 import {
   consumePendingChatUnlock,
   peekPendingChatUnlock,
-  savePendingChatUnlock,
   type PendingChatUnlock,
   type PendingChatUnlockKind,
 } from "@/lib/navigation/chat_unlock_session";
-import { getDefaultPayChannelForCountryCode } from "@/lib/payment/default_pay_channel";
+import { useAppNavigator } from "@/router/use-app-navigator";
+import { useChatDispatch, useChatState } from "@/stores/chat/chat-context";
+import type { ChatUnlockPaywallRequest } from "@/stores/chat/chat-state";
+import { useUserState } from "@/stores/user/user-context";
 
 import { getInsufficientCreditsSubscriptionType } from "../chat-screen.helpers";
 
@@ -40,14 +36,10 @@ export function useChatUnlockNavigationFlow({
   expectedKind,
   expectedMessageId,
 }: UseChatUnlockNavigationFlowInput): UseChatUnlockNavigationFlowOutput {
-  const router = useRouter();
-  const authState = useAuthState();
+  const navigator = useAppNavigator();
   const userState = useUserState();
   const chatState = useChatState();
   const chatDispatch = useChatDispatch();
-  const isAuthenticatedUser =
-    authState.loginStatus !== "notLoggedIn" &&
-    authState.loginStatus !== "guest";
   const unlockPaywallRequest = getScopedUnlockPaywallRequest({
     request: chatState.unlockPaywallRequest,
     expectedKind,
@@ -55,7 +47,7 @@ export function useChatUnlockNavigationFlow({
   });
 
   useEffect(() => {
-    if (!chatState.historyLoaded || !isAuthenticatedUser) return;
+    if (!chatState.historyLoaded || !navigator.isAuthenticatedUser) return;
 
     let cancelled = false;
 
@@ -93,7 +85,7 @@ export function useChatUnlockNavigationFlow({
     chatState.historyLoaded,
     expectedKind,
     expectedMessageId,
-    isAuthenticatedUser,
+    navigator.isAuthenticatedUser,
     returnUrl,
   ]);
 
@@ -101,23 +93,17 @@ export function useChatUnlockNavigationFlow({
     messageId: string,
     kind: PendingChatUnlockKind,
   ): void {
-    if (!isAuthenticatedUser) {
-      void (async () => {
-        await savePendingChatUnlock({
-          messageId,
-          kind,
-          returnUrl,
-          stage: "auth",
-        });
-        router.push(ROUTE_BUILDERS.authWithRedirect(returnUrl));
-      })();
-      return;
-    }
-
-    chatDispatch({
-      type: "ChatUnlockMessageRequested",
+    navigator.startMessageUnlock({
       messageId,
       kind,
+      returnUrl,
+      onAuthenticated: () => {
+        chatDispatch({
+          type: "ChatUnlockMessageRequested",
+          messageId,
+          kind,
+        });
+      },
     });
   }
 
@@ -128,24 +114,13 @@ export function useChatUnlockNavigationFlow({
   function confirmInsufficientCreditsDialog(): void {
     if (!unlockPaywallRequest) return;
 
-    void (async () => {
-      await savePendingChatUnlock({
-        messageId: unlockPaywallRequest.messageId,
-        kind: unlockPaywallRequest.kind,
-        returnUrl,
-        stage: "payment",
-      });
-      chatDispatch({ type: "ChatUnlockPaywallNavigationConsumed" });
-      const defaultPayChannel = getDefaultPayChannelForCountryCode(
-        userState.currentUser?.countryCode,
-      );
-      router.push(
-        ROUTE_BUILDERS.subscription(
-          getInsufficientCreditsSubscriptionType(userState.isVip),
-          { payChannel: defaultPayChannel, returnTo: "chat" },
-        ),
-      );
-    })();
+    chatDispatch({ type: "ChatUnlockPaywallNavigationConsumed" });
+    navigator.openSubscriptionForPendingUnlock({
+      messageId: unlockPaywallRequest.messageId,
+      kind: unlockPaywallRequest.kind,
+      returnUrl,
+      type: getInsufficientCreditsSubscriptionType(userState.isVip),
+    });
   }
 
   return {