/// <summary>
/// Read the alarms stored on the disk.
/// </summary>
/// <returns>
/// A list of alarms that was read from the disk.
/// If there is nothing on the disk, return an empty list.
/// </returns>
public static async Task <T> ReadFile <T>(AppFiles file, AppFileExtension ext = AppFileExtension.JSON)
{
string fileName = GetFullFileName(file, ext);
//Check if alarm file exists.
bool alarmFileExists = await DoesFileExist(fileName);
if (!alarmFileExists)
{
await CreateFile(fileName);
}
//Fetch the data from the file. (JSON).
string data = await ReadFromFile(fileName);
if (string.IsNullOrEmpty(data))
{
//We don't have any stored data, return this.
return(default(T));
}
else
{
//Convert from json of what ever was on the disk.
return(JsonConvert.DeserializeObject <T>(data));
}
}
/// <summary>
/// Save the alarms list to disk in JSON format.
/// </summary>
/// <param name="alarms"> The list of alarms we want to serialize to disk.</param>
/// <returns>Void, but async always needs to return Task.</returns>
public static async Task SaveFile <T>(AppFiles file, AppFileExtension ext, T data)
{
string fileName = GetFullFileName(file, ext);
//Overwrite the existing file.
await CreateFile(fileName);
//Serialize the contents and write it out the disk.
string content = JsonConvert.SerializeObject(data);
await WriteToFile(fileName, content);
}
/// <summary>
/// Remove the alarms file, clearing out any previous alarms.
/// </summary>
/// <returns>Bool wether we actually cleared the alarms file or not.</returns>
public static async Task <bool> ClearFile(AppFiles file, AppFileExtension ext)
{
string fileName = GetFullFileName(file, ext);
bool alarmFileExists = await DoesFileExist(fileName);
if (alarmFileExists)
{
await DeleteFile(fileName);
return(true);
}
return(false);
}
/// <summary>
/// Convert the two enums to a consistent file name.
/// </summary>
/// <param name="file">The files enum we want to convert</param>
/// <param name="ext">The files extension enum we want to convert</param>
/// <returns>THe file name of a combination of file and extension.</returns>
private static string GetFullFileName(AppFiles file, AppFileExtension ext)
{
return($"{file.ToString().ToLower()}.{ext.ToString().ToLower()}");
}
