public static List <FileObject> GetFilesListFromJson()
{
try
{
if (!string.IsNullOrWhiteSpace(FileObjectsSavedList))
{
return(JsonConvert.DeserializeObject <List <FileObject> >(FileObjectsSavedList));
}
}
catch (Exception ex)
{
UserDialogsService.DisplayException(ex);
}
return(new List <FileObject>());
}
public static void RemoveFileFromList(FileObject obj)
{
try
{
List <FileObject> list = GetFilesListFromJson();
if (list != null)
{
FileObject removeObj = list.FirstOrDefault(x => x.FileGuid == obj.FileGuid);
if (removeObj != null)
{
list.Remove(removeObj);
SaveList(list);
}
}
}
catch (Exception ex)
{
UserDialogsService.DisplayException(ex);
}
}
public static void AddFileToJsonList(FileObject obj)
{
try
{
List <FileObject> list = GetFilesListFromJson();
if (list == null)
{
list = new List <FileObject>();
}
if (list.FirstOrDefault(x => x.FilePath == obj.FileGuid) == null)
{
list.Add(obj);
}
SaveList(list);
}
catch (Exception ex)
{
UserDialogsService.DisplayException(ex);
}
}
public static async Task <bool> GetStoragePermissionsAsync()
{
try
{
var status = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Storage);
if (status != PermissionStatus.Granted)
{
if (await CrossPermissions.Current.ShouldShowRequestPermissionRationaleAsync(Permission.Storage))
{
UserDialogs.Instance.Alert("Need External Storage Permissions.", "Permissions", "OK");
}
var results = await CrossPermissions.Current.RequestPermissionsAsync(Permission.Storage);
if (results.ContainsKey(Permission.Storage))
{
status = results[Permission.Storage];
}
}
if (status == PermissionStatus.Granted)
{
return(true);
}
else if (status != PermissionStatus.Unknown)
{
UserDialogs.Instance.Alert("Can not continue, try again.", "Permission Unknown", "OK");
}
}
catch (Exception ex)
{
UserDialogsService.DisplayException(ex);
}
return(false);
}
