internal async Task Log(GeofenceState newState, Geoposition position)
{
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(
this.fileName, CreationCollisionOption.OpenIfExists);
PositionLogEntry entry = PositionLogEntry.FromFenceDetails(newState,
position);
await FileIO.AppendLinesAsync(file, new string[] { entry.ToLogEntry() });
}
internal static PositionLogEntry FromLogEntry(string logFileEntry)
{
string[] pieces = logFileEntry.Split('|');
PositionLogEntry entry = new PositionLogEntry()
{
Date = DateTimeOffset.Parse(pieces[0]),
Latitude = double.Parse(pieces[1]),
Longitude = double.Parse(pieces[2]),
Altitude = double.Parse(pieces[3]),
State = (GeofenceState)Enum.Parse(typeof(GeofenceState), pieces[4])
};
return(entry);
}
internal static PositionLogEntry FromFenceDetails(
GeofenceState newState, Geoposition position)
{
PositionLogEntry entry = new PositionLogEntry()
{
Date = DateTimeOffset.Now,
Latitude = position.Coordinate.Latitude,
Longitude = position.Coordinate.Longitude,
Altitude = position.Coordinate.Altitude ?? 0.0d,
State = newState
};
return(entry);
}
internal async Task <IEnumerable <PositionLogEntry> > ReadEntriesAsync()
{
List <PositionLogEntry> list = new List <PositionLogEntry>();
try
{
StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(
this.fileName);
IList <string> lines = await FileIO.ReadLinesAsync(file);
list.AddRange(
lines.Select(
line => PositionLogEntry.FromLogEntry(line)
)
);
}
catch (FileNotFoundException)
{
}
return(list);
}