davidortinau/maui-skills/maui-permissions

// ❌ Shows prompt even if already granted
var status = await Permissions.RequestAsync<Permissions.Camera>();
 
// ✅ Check first — avoids unnecessary prompts
var status = await Permissions.CheckStatusAsync<Permissions.Camera>();
if (status != PermissionStatus.Granted)
    status = await Permissions.RequestAsync<Permissions.Camera>();

// ❌ Blocks the UI thread or throws
public MyViewModel()
{
    var status = Permissions.RequestAsync<Permissions.Camera>().Result;
}
 
// ✅ Use OnAppearing, a command, or async initialization
protected override async void OnAppearing()
{
    await CheckAndRequestPermissionAsync<Permissions.Camera>();
}

// ❌ Only checks for Granted — misses edge cases
if (status == PermissionStatus.Granted) { /* proceed */ }
 
// ✅ Handle all relevant statuses
switch (status)
{
    case PermissionStatus.Granted: /* proceed */ break;
    case PermissionStatus.Limited: /* iOS partial access */ break;
    case PermissionStatus.Denied:
    case PermissionStatus.Restricted:
        await ShowSettingsPromptAsync(); break;
}

if (Permissions.ShouldShowRationale<Permissions.Camera>())
{
    await Shell.Current.DisplayAlert("Permission needed",
        "Camera access is required to scan barcodes.", "OK");
}
status = await Permissions.RequestAsync<Permissions.Camera>();

// ❌ Always returns Granted on API 33+ — gives false confidence
await Permissions.RequestAsync<Permissions.StorageRead>();
 
// ✅ Use the specific media permission
await Permissions.RequestAsync<Permissions.Photos>();       // photo access
await Permissions.RequestAsync<Permissions.Media>();         // audio/video

public async Task<PermissionStatus> CheckAndRequestPermissionAsync<T>()
    where T : Permissions.BasePermission, new()
{
    var status = await Permissions.CheckStatusAsync<T>();
    if (status == PermissionStatus.Granted)
        return status;
 
    if (status == PermissionStatus.Denied && DeviceInfo.Platform == DevicePlatform.iOS)
        return status; // iOS won't show dialog again
 
    if (Permissions.ShouldShowRationale<T>())
    {
        await Shell.Current.DisplayAlert("Permission needed",
            "This feature requires the requested permission.", "OK");
    }
 
    return await Permissions.RequestAsync<T>();
}