feat: near outstanding loans and overdued loans (admin or librarian access)

lib/src/providers/auth_provider.dart

@@ -23,6 +23,10 @@ class AuthProvider with ChangeNotifier {
   bool resetPasswordTokenSended = false;
   bool resetPasswordSucced = false;
 
+  List<dynamic>? loans;
+  List<dynamic>? nearOutstandingLoans;
+  List<dynamic>? overduedLoans;
+
   Future<void> storeAccessToken(String accessToken) async {
     await storage.write(key: 'access_token', value: accessToken);
   }
@@ -366,4 +370,47 @@ class AuthProvider with ChangeNotifier {
       debugPrint("Failed to create member loan. $error");
     }
   }
+
+  // for admin or librarian
+  Future<void> getLoans(String? type) async {
+    final token = await storage.read(key: 'access_token');
+    String url = baseUrl;
+    if (type == "upcoming") {
+      url += "/upcoming-loans/";
+    } else if (type == "overdue") {
+      url += "/overdued-loans/";
+    } else {
+      url += "/book-loans/";
+    }
+
+    if (token != null) {
+      try {
+        final response = await http.get(
+          Uri.parse(url),
+          headers: {
+            'Content-Type': 'application/json',
+            'Authorization': 'Bearer $token',
+          },
+        );
+
+        if (response.statusCode == 200) {
+          final data = jsonDecode(response.body);
+          if (type == "upcoming") {
+            nearOutstandingLoans = data["results"];
+          } else if (type == "overdue") {
+            overduedLoans = data["results"];
+          } else {
+            loans = data["results"];
+          }
+        } else {
+          final code = response.statusCode;
+          debugPrint("Error: Fetch upcoming loans failed, $code");
+        }
+
+        notifyListeners();
+      } catch (error) {
+        debugPrint("Error: Fetch upcoming loans failed, $error");
+      }
+    }
+  }
 }

lib/src/screens/admin_list_screen.dart

@@ -6,8 +6,9 @@ import 'package:library_app/src/providers/book_provider.dart';
 import 'package:library_app/src/providers/navigations_provider.dart';
 
 import 'package:library_app/src/widgets/home.dart';
-import 'package:library_app/src/widgets/loans/loan_list.dart';
 import 'package:library_app/src/widgets/profile.dart';
+import 'package:library_app/src/widgets/loans/overdued_loan_list.dart';
+import 'package:library_app/src/widgets/loans/upcoming_loan_list.dart';
 
 class AdminListScreen extends StatefulWidget {
   const AdminListScreen({super.key});
@@ -59,14 +60,10 @@ class _AdminListScreen extends State<AdminListScreen> {
           body: <Widget>[
             // Home
             const HomePage(),
-            // Books
-            LoanList(
-              memberId: authProvider.user?.accountId ?? 0,
-            ),
-            // Loans
-            LoanList(
-              memberId: authProvider.user?.accountId ?? 0,
-            ),
+            // Near Outstanding Loans
+            const UpcomingLoanList(),
+            // Overdued Loans
+            const OverduedLoanList(),
             // Profile
             const Profile(),
           ][navProvider.currentPageIndex],

lib/src/widgets/home.dart

@@ -29,49 +29,50 @@ class _HomePage extends State<HomePage> {
 
     return Consumer2<NavigationsProvider, AuthProvider>(
       builder: (context, navProvider, authProvider, child) {
-        return NestedScrollView(
-          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
-            return [
-              const TopBar(title: title),
-            ];
-          },
-          body: ListView(
-            children: <Widget>[
-              const Padding(
-                padding: EdgeInsets.symmetric(horizontal: 20.0),
-                child: Text("Shortcut"),
-              ),
-              Shortcut(
-                icon: authProvider.user!.isStaff
-                    ? Icons.timer_outlined
-                    : Icons.book_rounded,
-                title: authProvider.user!.isStaff
-                    ? "Near Outstanding Loans"
-                    : "Books",
-                subtitle: authProvider.user!.isStaff
-                    ? "Discover near outstanding users loans."
-                    : "Discover many amazing books.",
-                onTap: () {
-                  navProvider.navigate(1);
-                },
-              ),
-              Shortcut(
-                icon: authProvider.user!.isStaff
-                    ? Icons.timer_off_rounded
-                    : Icons.date_range_rounded,
-                title: authProvider.user!.isStaff
-                    ? "Overdued Loans"
-                    : "Book Loans",
-                subtitle: authProvider.user!.isStaff
-                    ? "Discover Overdued users loans."
-                    : "Manage your book loan very easy.",
-                onTap: () {
-                  navProvider.navigate(2);
-                },
-              ),
-            ],
-          ),
-        );
+        final user = authProvider.user;
+        if (user != null) {
+          return NestedScrollView(
+            headerSliverBuilder:
+                (BuildContext context, bool innerBoxIsScrolled) {
+              return [
+                const TopBar(title: title),
+              ];
+            },
+            body: ListView(
+              children: <Widget>[
+                const Padding(
+                  padding: EdgeInsets.symmetric(horizontal: 20.0),
+                  child: Text("Shortcut"),
+                ),
+                Shortcut(
+                  icon:
+                      user.isStaff ? Icons.timer_outlined : Icons.book_rounded,
+                  title: user.isStaff ? "Near Outstanding Loans" : "Books",
+                  subtitle: user.isStaff
+                      ? "Discover near outstanding users loans."
+                      : "Discover many amazing books.",
+                  onTap: () {
+                    navProvider.navigate(1);
+                  },
+                ),
+                Shortcut(
+                  icon: user.isStaff
+                      ? Icons.timer_off_rounded
+                      : Icons.date_range_rounded,
+                  title: user.isStaff ? "Overdued Loans" : "Book Loans",
+                  subtitle: user.isStaff
+                      ? "Discover Overdued users loans."
+                      : "Manage your book loan very easy.",
+                  onTap: () {
+                    navProvider.navigate(2);
+                  },
+                ),
+              ],
+            ),
+          );
+        }
+
+        return Container();
       },
     );
   }

lib/src/widgets/loans/overdued_loan_list.dart

+import 'package:flutter/material.dart';
+import 'package:library_app/src/models/book.dart';
+import 'package:library_app/src/providers/auth_provider.dart';
+import 'package:provider/provider.dart';
+
+import 'package:library_app/src/models/loan.dart';
+import 'package:library_app/src/widgets/loans/loan_item.dart';
+
+class OverduedLoanList extends StatefulWidget {
+  const OverduedLoanList({super.key});
+
+  @override
+  State<OverduedLoanList> createState() => _OverduedLoanList();
+}
+
+class _OverduedLoanList extends State<OverduedLoanList> {
+  @override
+  void initState() {
+    super.initState();
+    Provider.of<AuthProvider>(context, listen: false).getLoans("overdue");
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<AuthProvider>(builder: (context, loanProvider, child) {
+      if (loanProvider.overduedLoans != null) {
+        var loans = loanProvider.overduedLoans!.map(
+          (loan) {
+            var book = Book.fromJson(loan["book_detail"]);
+            return Loan(
+              book,
+              loan["loan_date"],
+              loan["due_date"],
+              loan["remaining_loan_time"],
+              loan["is_overdue"],
+            );
+          },
+        );
+
+        return NestedScrollView(
+          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
+            return [const TopAppBar(title: "Overdued Loans")];
+          },
+          body: ListView(
+            children: List.generate(loans.length, (index) {
+              return LoanItem(loans.elementAt(index));
+            }),
+          ),
+        );
+      } else {
+        return NestedScrollView(
+          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
+            return [const TopAppBar(title: "Book Loans")];
+          },
+          body: const Center(
+            child: Text("the loan is currently empty"),
+          ),
+        );
+      }
+    });
+  }
+}
+
+class TopAppBar extends StatefulWidget {
+  final String title;
+
+  const TopAppBar({super.key, required this.title});
+
+  @override
+  _TopAppBar createState() => _TopAppBar();
+}
+
+class _TopAppBar extends State<TopAppBar> {
+  String get title => widget.title;
+  bool showWidget = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return SliverAppBar(
+      title: Text(title),
+      elevation: 10.0,
+      automaticallyImplyLeading: false,
+      expandedHeight: 50,
+      floating: true,
+      snap: true,
+    );
+  }
+}

lib/src/widgets/loans/upcoming_loan_list.dart

+import 'package:flutter/material.dart';
+import 'package:library_app/src/models/book.dart';
+import 'package:library_app/src/providers/auth_provider.dart';
+import 'package:provider/provider.dart';
+
+import 'package:library_app/src/models/loan.dart';
+import 'package:library_app/src/widgets/loans/loan_item.dart';
+
+class UpcomingLoanList extends StatefulWidget {
+  const UpcomingLoanList({super.key});
+
+  @override
+  State<UpcomingLoanList> createState() => _UpcomingLoanList();
+}
+
+class _UpcomingLoanList extends State<UpcomingLoanList> {
+  @override
+  void initState() {
+    super.initState();
+    Provider.of<AuthProvider>(context, listen: false).getLoans("upcoming");
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<AuthProvider>(builder: (context, loanProvider, child) {
+      if (loanProvider.nearOutstandingLoans != null) {
+        var loans = loanProvider.nearOutstandingLoans!.map(
+          (loan) {
+            var book = Book.fromJson(loan["book_detail"]);
+            return Loan(
+              book,
+              loan["loan_date"],
+              loan["due_date"],
+              loan["remaining_loan_time"],
+              loan["is_overdue"],
+            );
+          },
+        );
+
+        return NestedScrollView(
+          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
+            return [const TopAppBar(title: "Near Outstanding Loans")];
+          },
+          body: ListView(
+            children: List.generate(loans.length, (index) {
+              return LoanItem(loans.elementAt(index));
+            }),
+          ),
+        );
+      } else {
+        return NestedScrollView(
+          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
+            return [const TopAppBar(title: "Book Loans")];
+          },
+          body: const Center(
+            child: Text("the loan is currently empty"),
+          ),
+        );
+      }
+    });
+  }
+}
+
+class TopAppBar extends StatefulWidget {
+  final String title;
+
+  const TopAppBar({super.key, required this.title});
+
+  @override
+  _TopAppBar createState() => _TopAppBar();
+}
+
+class _TopAppBar extends State<TopAppBar> {
+  String get title => widget.title;
+  bool showWidget = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return SliverAppBar(
+      title: Text(title),
+      elevation: 10.0,
+      automaticallyImplyLeading: false,
+      expandedHeight: 50,
+      floating: true,
+      snap: true,
+    );
+  }
+}