is there a better way to write a document stream builder? - flutter

Question

Is there a better way to write this code?
The application is about jobs and job applications.
Each job can have multiple job applications.
if the job is fulfilled, all the job applications should be closed so that people are not applying to a job that is closed.
I don't like the way the code is written but it achieves the functionality that I wanted.
to get to the 'JobApplicationView' I have to go through a page that displays all the current job applications, once I click on one of the job application, the job application.
here is the snip of code from the 'job application list view'
StreamBuilder(
stream: _jobsService.allJobApplications(userId),
builder: (context, snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.waiting:
case ConnectionState.active:
if (snapshot.hasData) {
final allJobApplications =
snapshot.data as Iterable<CloudJobApplication>;
return JobApplicationsListView(
allowScroll: false,
jobApplications: allJobApplications,
onTap: (job) {
Navigator.of(context).pushNamed(
myJobApplicationsRoute,
arguments: job,
);
},
);
} else {
return const CircularProgressIndicator();
}
default:
return const CircularProgressIndicator();
}
},
),
Below is the really ugly code that performs the functionality that i want
class JobApplicationView extends StatefulWidget {
const JobApplicationView({Key? key}) : super(key: key);
#override
_JobApplicationViewState createState() => _JobApplicationViewState();
}
class _JobApplicationViewState extends State<JobApplicationView> {
final _formKey = GlobalKey<FormState>();
late final FirebaseCloudStorage _cloudFunctions;
final currentUser = AuthService.firebase().currentUser!;
#override
void initState() {
super.initState();
_cloudFunctions = FirebaseCloudStorage();
}
getExistingJobApplication(BuildContext context) {
return FirebaseFirestore.instance
.collection('job application')
.doc(context.getArgument<CloudJobApplication>()!.documentId)
.snapshots();
}
submitProposal(localStates) {
submitProposal() async {
await _cloudFunctions.updateJobApplicationColumn(
documentId: context.getArgument<CloudJobApplication>()!.documentId,
fieldNameColumn: jobApplicationStateColumn,
fieldNameColumnValue: jobApplicationStateOpen);
await _cloudFunctions.updateJobApplicationColumn(
documentId: context.getArgument<CloudJobApplication>()!.documentId,
fieldNameColumn: jobApplicationSubStateColumn,
fieldNameColumnValue: 'Awaiting client proposal');
}
// job applicator can submit proposal if the state is new
if (localStates['jobApplicatotIsSameAsCurrentUser'] &&
localStates['jobApplication'][jobApplicationStateColumn] ==
jobApplicationStateNew) {
return ElevatedButton(
style: ElevatedButton.styleFrom(
textStyle: const TextStyle(fontSize: 13),
backgroundColor: Colors.blue,
),
onPressed: () => submitProposal(),
child: const Text('Submit proposal'),
);
// job creator can accept the proposal if state is open
// job creator can deny job proposal if state is open
} else {
return Container();
}
}
#override
void dispose() {
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('update job application'),
actions: [],
),
body: StreamBuilder(
stream: getExistingJobApplication(context),
builder: (context, AsyncSnapshot<DocumentSnapshot> snapshot) {
if (!snapshot.hasData) {
return const CircularProgressIndicator();
}
// this is where I saved the local states
var localStates = {};
localStates['width'] = MediaQuery.of(context).size.width;
localStates['jobApplication'] = snapshot.data;
localStates['formFieldsEditable'] = localStates['jobApplication']
[jobApplicationStateColumn] ==
jobApplicationStateNew &&
currentUser.id ==
localStates['jobApplication'][jobApplicatorIdColumn]
? true
: false;
localStates['jobApplicatotIsSameAsCurrentUser'] = currentUser.id ==
localStates['jobApplication'][jobApplicatorIdColumn];
localStates['jobCreatorIsSameAsCurrentUser'] = currentUser.id ==
localStates['jobApplication'][jobCreatorIdColumn];
return Form(
key: _formKey,
child: ListView(
padding: const EdgeInsets.all(32.0),
children: [
submitProposal(localStates),
],
),
);
}),
);
}
}