fix: shifting near outstanding and overdue loans (admin access) to one reusable widget

lib/src/screens/admin_list_screen.dart

 import 'package:flutter/material.dart';
+import 'package:library_app/src/widgets/loans/admin_loan_list.dart';
 import 'package:provider/provider.dart';
 
 import 'package:library_app/src/providers/auth_provider.dart';
@@ -7,8 +8,6 @@ import 'package:library_app/src/providers/navigations_provider.dart';
 
 import 'package:library_app/src/widgets/home.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});
@@ -61,9 +60,10 @@ class _AdminListScreen extends State<AdminListScreen> {
             // Home
             const HomePage(),
             // Near Outstanding Loans
-            const UpcomingLoanList(),
+            const AdminLoanList(
+                title: "Near Outstanding Loans", type: "upcoming"),
             // Overdued Loans
-            const OverduedLoanList(),
+            const AdminLoanList(title: "Overdued Loans", type: "overdue"),
             // Profile
             const Profile(),
           ][navProvider.currentPageIndex],

lib/src/widgets/loans/overdued_loan_list.dart → lib/src/widgets/loans/admin_loan_list.dart

@@ -6,25 +6,38 @@ 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});
+class AdminLoanList extends StatefulWidget {
+  final String title;
+  final String type;
+
+  const AdminLoanList({
+    super.key,
+    required this.title,
+    required this.type,
+  });
 
   @override
-  State<OverduedLoanList> createState() => _OverduedLoanList();
+  State<AdminLoanList> createState() => _AdminLoanList();
 }
 
-class _OverduedLoanList extends State<OverduedLoanList> {
+class _AdminLoanList extends State<AdminLoanList> {
+  String get title => widget.title;
+  String get type => widget.type;
+
   @override
   void initState() {
     super.initState();
-    Provider.of<AuthProvider>(context, listen: false).getLoans("overdue");
+    Provider.of<AuthProvider>(context, listen: false).getLoans(type);
   }
 
   @override
   Widget build(BuildContext context) {
     return Consumer<AuthProvider>(builder: (context, loanProvider, child) {
-      if (loanProvider.overduedLoans != null) {
-        var loans = loanProvider.overduedLoans!.map(
+      final getLoans = type == "upcoming"
+          ? loanProvider.nearOutstandingLoans
+          : loanProvider.overduedLoans;
+      if (getLoans != null) {
+        var loans = getLoans.map(
           (loan) {
             var book = Book.fromJson(loan["book_detail"]);
             return Loan(
@@ -39,7 +52,7 @@ class _OverduedLoanList extends State<OverduedLoanList> {
 
         return NestedScrollView(
           headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
-            return [const TopAppBar(title: "Overdued Loans")];
+            return [TopAppBar(title: title)];
           },
           body: ListView(
             children: List.generate(loans.length, (index) {
@@ -50,7 +63,7 @@ class _OverduedLoanList extends State<OverduedLoanList> {
       } else {
         return NestedScrollView(
           headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
-            return [const TopAppBar(title: "Book Loans")];
+            return [TopAppBar(title: title)];
           },
           body: const Center(
             child: Text("the loan is currently empty"),

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,
-    );
-  }
-}