isolating only api calls

lib/api_service.dart

@@ -9,46 +9,22 @@ import 'dart:ui_web' as ui;
 import 'augment.dart';
 import 'dart:html' as html;
 
-//data structure
-class MailAddress {
-  final String? name;
-  final String address;
-  MailAddress({this.name, required this.address});
 
-  factory MailAddress.fromJson(Map<String, dynamic> json) {
-    return MailAddress(
-      name: json['name'],
-      address: json['address'],
-    );
-  }
-
-  @override
-  String toString() {
-    // TODO: implement toString
-    return '${name} <${address}>';
-  }
-}
-
-class EmailPage extends StatefulWidget {
-  // email widget
-  const EmailPage({super.key});
-  final String title = 'Emails';
-
-  @override
-  State<EmailPage> createState() => EmailPageState();
-}
-
-class EmailPageState extends State<EmailPage> {
-  List emails = [];
-
-  void _displayEmailsFromFolder(String folder) async {
-    List<GetThreadResponse> allEmails = []; //all the emails
+class ApiService {
+  // List emails = [];
 
+  Future<List<GetThreadResponse>> fetchEmailsFromFolder(
+      String folder, int pagenitaion) async {
     try {
-      var url = Uri.http('127.0.0.1:3001', 'sorted_threads_by_date',
-          {'folder': folder, 'limit': '10', 'offset': '0'});
+      var url = Uri.http('127.0.0.1:3001', 'sorted_threads_by_date', {
+        'folder': folder,
+        'limit': '20',
+        'offset': pagenitaion,
+      });
       var response = await http.get(url);
       print(response);
+      List<GetThreadResponse> allEmails = [];
+
       if (response.statusCode == 200) {
         List json = jsonDecode(response.body);
         for (var item in json.take(1)) {
@@ -60,21 +36,25 @@ class EmailPageState extends State<EmailPage> {
             }
           }
         }
+        return allEmails;
       } else {
         throw Exception('Failed to load threads');
       }
     } catch (e) {
       print('_displayEmailsFromFolder caught error: $e');
+      return [];
     }
     print("Done");
 
-    setState(() {
-      emails = allEmails;
-    });
+    // setState(() {
+    //   emails = allEmails;
+    // });
   }
 
   Future<void> fetchThreads(
-      int threadId, List<GetThreadResponse> allEmails) async {
+      //populates allEmails, which is the List that contains all the emails in a thread
+      int threadId,
+      List<GetThreadResponse> allEmails) async {
     try {
       var url =
           Uri.http('127.0.0.1:3001', 'get_thread', {'id': threadId.toString()});
@@ -95,7 +75,7 @@ class EmailPageState extends State<EmailPage> {
     }
   }
 
-  Future<String> _getEmailContent(List<String> IDs) async {
+  Future<String> fetchEmailContent(List<String> IDs) async {
     String content = r"""
     """;
 
@@ -108,7 +88,7 @@ class EmailPageState extends State<EmailPage> {
 
         if (response.statusCode == 200) {
           content += response.body;
-          content += "<p>end of mail</p><br><br><br>";
+          content += "<p>end of mail</p><br><br><br><hr>";
         }
       }
     } catch (e) {
@@ -122,144 +102,15 @@ class EmailPageState extends State<EmailPage> {
   //   showDialog(context: context, builder: builder)
   // }
 
-  Future<List<Widget>> getDrawerItems(BuildContext context) async {
-    List<String> drawerItems = [];
-
+  Future<List<String>> fetchFolders() async {
     try {
       var url = Uri.http('127.0.0.1:3001', 'folders');
       var response = await http.get(url);
-      drawerItems = List<String>.from(json.decode(response.body));
+      return List<String>.from(json.decode(response.body));
     } catch (e) {
-      print('getDrawerItems caught error: $e');
+      print('fetchFolders caught error: $e');
+      return [];
     }
-
-    List<Widget> drawerWidgets = []; // email folders
-
-    for (String item in drawerItems) {
-      drawerWidgets.add(
-        ListTile(
-          leading: Icon(Icons.mail),
-          title: Text(item),
-          onTap: () {
-            _displayEmailsFromFolder(item);
-            Navigator.pop(context);
-          },
-        ),
-      );
-    }
-    drawerWidgets.add(ListTile(
-      leading: Icon(Icons.add),
-      onTap: () {
-        // _addMailBox(context);
-        print('adding folder');
-        Navigator.pop(context);
-      },
-    ));
-
-    return drawerWidgets;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Text(widget.title),
-      ),
-      drawer: Drawer(
-        child: FutureBuilder<List<Widget>>(
-          future: getDrawerItems(
-              context), // call the async function to get the future
-          builder:
-              (BuildContext context, AsyncSnapshot<List<Widget>> snapshot) {
-            if (snapshot.connectionState == ConnectionState.waiting) {
-              // While data is loading, show a progress indicator
-              return Center(child: CircularProgressIndicator());
-            } else if (snapshot.hasError) {
-              // If something went wrong, show an error message
-              return Center(child: Text('Error: ${snapshot.error}'));
-            } else {
-              // When data is fetched successfully, display the items
-              return ListView(
-                padding: EdgeInsets.zero,
-                children:
-                    snapshot.data!, // Unwrap the data once confirmed it's there
-              );
-            }
-          },
-        ),
-      ),
-      body: EmailListScreen(
-        emails: emails,
-        getEmailContent: _getEmailContent,
-        // getJsonEmail: _getThreadMessagesJson
-      ),
-    );
-  }
-}
-
-class EmailListScreen extends StatelessWidget {
-  //this is the bulding of the drawer with all emails
-  // try to only get the subject and id, date, sender to make it faster
-  final List emails;
-  final Future<String> Function(List<String>) getEmailContent;
-
-  EmailListScreen({
-    required this.emails,
-    required this.getEmailContent,
-  });
-  // instead of getting the entire email, just the from, text, subject, and id
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text('Emails'),
-      ),
-      body: ListView.separated(
-        itemCount: emails.length,
-        itemBuilder: (context, index) {
-          return ListTile(
-              title: Text(emails[index].from_name,
-                  style: TextStyle(fontWeight: FontWeight.bold)),
-              subtitle: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: [
-                  Text(emails[index].subject),
-                ],
-              ),
-              trailing: Text(emails[index].date.toString()),
-              //here we assign each part of json to a var, this could be changed so it only happens,
-              // when clicking on email for modularity
-              onTap: () async {
-                String emailContent =
-                    await getEmailContent(emails[index].messages);
-                String fromName = emails[index].from_name.toString();
-                String fromAddress = emails[index].from_address.toString();
-                String to = emails[index].to.toString();
-                String subject = emails[index].subject.toString();
-                String date = emails[index].date.toString();
-                String id = emails[index].id.toString();
-
-                Navigator.push(
-                  context,
-                  MaterialPageRoute(
-                      builder: (context) => EmailView(
-                            emailContent: emailContent,
-                            from: fromAddress,
-                            name: fromName,
-                            to: to,
-                            subject: subject,
-                            date: date,
-                            id: id,
-                          )),
-                );
-              });
-        },
-        separatorBuilder: (context, index) {
-          return Divider();
-        },
-      ),
-    );
   }
 }