From 6486dce7517249710ca6f06397b61b18b99ce5dc Mon Sep 17 00:00:00 2001
From: SethCohen <sethcohen.dev@gmail.com>
Date: Mon, 3 Apr 2023 01:57:43 -0400
Subject: [PATCH] feat(review): added next available review indicator

---
 .../features/review/reviews_list_page.dart    | 49 ++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/src/lib/features/review/reviews_list_page.dart b/src/lib/features/review/reviews_list_page.dart
index 76abf09..dd10a5e 100644
--- a/src/lib/features/review/reviews_list_page.dart
+++ b/src/lib/features/review/reviews_list_page.dart
@@ -1,6 +1,8 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../../common/utils/data_provider.dart';
+import '../authentication/google_provider.dart';
 import 'review_model.dart';
 
 class ReviewPage extends StatefulWidget {
@@ -24,7 +26,41 @@ class _ReviewPageState extends State<ReviewPage> {
     _decks = context.watch<DataProvider>().reviews;
 
     if (_decks.isEmpty) {
-      return const Center(child: Text('Nothing left to review! Good work!'));
+      // TODO cleanup
+      return Center(
+          child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          const Text('No reviews available.  Please come back again later.'),
+          StreamBuilder(
+              stream: _getNextReview(),
+              builder: (BuildContext context,
+                  AsyncSnapshot<QuerySnapshot> snapshot) {
+                if (snapshot.hasError) {
+                  return Text('Error: ${snapshot.error}');
+                }
+
+                if (snapshot.connectionState == ConnectionState.waiting) {
+                  return const CircularProgressIndicator();
+                }
+
+                if (snapshot.data!.docs.isEmpty) {
+                  return const Text(
+                      'Please do a lesson first to get a review.');
+                }
+
+                final card =
+                    snapshot.data!.docs.first.data() as Map<String, dynamic>;
+
+                final formattedDate = (card['nextReview'] as Timestamp)
+                    .toDate()
+                    .toLocal()
+                    .toString();
+
+                return Text('Next Review: $formattedDate');
+              }),
+        ],
+      ));
     }
 
     final allCards = _decks.values.expand((element) => element).toList();
@@ -68,4 +104,15 @@ class _ReviewPageState extends State<ReviewPage> {
       },
     );
   }
+
+  Stream<QuerySnapshot> _getNextReview() {
+    final currentUser = context.read<GoogleSignInProvider>().user;
+
+    return FirebaseFirestore.instance
+        .collectionGroup('cards')
+        .where('userId', isEqualTo: currentUser!.uid)
+        .orderBy('nextReview', descending: false)
+        .limit(1)
+        .snapshots();
+  }
 }