async Task <IEnumerable <WifiNetworkDto> > FindInternal(FindDelegateBulk findMethod)
{
var delimiter = '\t';
var lstRes = new List <WifiNetworkDto>();
using (var fs = new FileStream(_filePathCSV, FileMode.Open, FileAccess.Read))
{
using (var fr = new StreamReader(fs, Constants.UNIVERSAL_ENCODING))
{
// skip header
var ss2 = await fr.ReadLineAsync();
while (!fr.EndOfStream)
{
var lineFromCSV = await fr.ReadLineAsync();
if (string.IsNullOrWhiteSpace(lineFromCSV))
{
continue;
}
var wifiDtoFromFile = WifiNetworkDto.GetWifiDtoFromString(lineFromCSV, delimiter);
if (findMethod(wifiDtoFromFile))
{
lstRes.Add(wifiDtoFromFile);
}
}
}
}
return(lstRes);
}
public async Task SaveToCSVAsync(List <WifiNetworkDto> wifiNetworksOnAir)
{
FileStream fsBAK = null;
var delimiter = '\t';
try
{
//await RequestStorageWritePermission();
//var newStatus = await CrossPermissions.Current.RequestPermissionsAsync(Plugin.Permissions.Abstractions.Permission.Storage);
//var br = RequestExternalStoragePermissionIfNecessary(RC_WRITE_EXTERNAL_STORAGE_PERMISSION);
var hasPermission = await Utils.CheckPermissions(Plugin.Permissions.Abstractions.Permission.Storage);
if (!hasPermission)
{
return;
}
//RequestPermissions(PERMISSIONS_TO_REQUEST, requestCode);
Android.Util.Log.Info(TAG, "Saving CSV in BAK as " + _filePathCSVBAK);
var csvAlreadyExists = System.IO.File.Exists(_filePathCSV);
if (csvAlreadyExists)
{
if (System.IO.File.Exists(_filePathCSVBAK))
{
//System.IO.File.Delete(_filePathCSVBAK);
}
// works in 2017, busted in 2019 - "Access denied"
//System.IO.File.Copy(_filePathCSV, _filePathCSVBAK, true);
await SafeFileCopy(_filePathCSV, _filePathCSVBAK);
fsBAK = new FileStream(_filePathCSVBAK, FileMode.Open);
}
var alreadySavedWifis = new List <WifiNetworkDto>();
var s = "";
using (var fsw = new FileStream(_filePathCSV, FileMode.Create))
{
using (var fw = new StreamWriter(fsw, Constants.UNIVERSAL_ENCODING))
{
// write header
await fw.WriteLineAsync($"Name{delimiter}Bssid{delimiter}Password{delimiter}IsBanned{delimiter}NetworkType{delimiter}Provider{delimiter}WpsPin{delimiter}FirstConnectWhen{delimiter}FirstConnectPublicIP{delimiter}RouterWebUIIP{delimiter}FirstConnectMac{delimiter}FirstCoordLat{delimiter}FirstCoordLong{delimiter}FirstCoordAlt{delimiter}LastCoordLat{delimiter}LastCoordLong{delimiter}LastCoordAlt{delimiter}");
if (csvAlreadyExists)
{
using (var sr = new StreamReader(fsBAK, Constants.UNIVERSAL_ENCODING))
{
var isHeaderline = true;
while (!sr.EndOfStream)
{
s = await sr.ReadLineAsync();
// skip header from BAK
if (isHeaderline)
{
isHeaderline = false;
continue;
}
WifiNetworkDto wifiDtoFromFile = WifiNetworkDto.GetWifiDtoFromString(s, delimiter);
var wifiOnAir = wifiNetworksOnAir.GetExistingWifiDto(wifiDtoFromFile);
if (wifiOnAir == null)
{
await fw.WriteLineAsync(s);
}
else
{
var res = WifiNetworkDto.NetworkToStringInCSV(wifiOnAir, delimiter);
await fw.WriteLineAsync(res);
alreadySavedWifis.Add(wifiOnAir);
}
}
}
}
foreach (var wifiOnAir in wifiNetworksOnAir)
{
var wifiAlreadySaved = alreadySavedWifis.GetExistingWifiDto(wifiOnAir);
if (wifiAlreadySaved == null)
{
var res = WifiNetworkDto.NetworkToStringInCSV(wifiOnAir, delimiter);
await fw.WriteLineAsync(res);
}
}
}
}
System.IO.File.Delete(_filePathCSVBAK);
}
catch (Exception ex)
{
Log.Error(TAG, "SaveToCSV " + ex.Message);
throw;
}
finally
{
fsBAK?.Close();
fsBAK?.Dispose();
}
}
async Task <WifiNetworkDto> FindInternal(WifiNetworkDto nw, bool byBssIdOnly, FindDelegate findMethod)
{
WifiNetworkDto wifiDtoFromFile;
var delimiter = '\t';
if (UseCachedNetworkLookup)
{
if (_CachedCSVNetworkList.Count == 0)
{
#region Populate CSV cache
using (var fs = new FileStream(_filePathCSV, FileMode.Open, FileAccess.Read))
{
using (var fr = new StreamReader(fs, Constants.UNIVERSAL_ENCODING))
{
// skip header
var ss2 = fr.ReadLine();
while (!fr.EndOfStream)
{
var lineFromCSV = fr.ReadLine();
if (string.IsNullOrWhiteSpace(lineFromCSV))
{
continue;
}
wifiDtoFromFile = WifiNetworkDto.GetWifiDtoFromString(lineFromCSV, delimiter);
_CachedCSVNetworkList.Add(wifiDtoFromFile);
}
}
}
#endregion
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// Refactor lookup code, also do the same for FindWifiInCSV()
// Use FindDelegate
var wifiDtoFromFileKVP = _CachedCSVNetworkList.FirstOrDefault(
(nwFromCache) => {
if (string.IsNullOrEmpty(nwFromCache.BssID))
{
return(nwFromCache.Name == nw.Name);
}
if (string.IsNullOrEmpty(nw.BssID))
{
return(nwFromCache.Name == nw.Name);
}
else
{
return(nwFromCache.BssID.ToUpper() == nw.BssID.ToUpper());
}
});
wifiDtoFromFile = wifiDtoFromFileKVP;
}
else
{
using (var fs = new FileStream(_filePathCSV, FileMode.Open, FileAccess.Read))
{
using (var fr = new StreamReader(fs, Constants.UNIVERSAL_ENCODING))
{
// skip header
var ss2 = await fr.ReadLineAsync();
while (!fr.EndOfStream)
{
var lineFromCSV = await fr.ReadLineAsync();
if (string.IsNullOrWhiteSpace(lineFromCSV))
{
continue;
}
wifiDtoFromFile = WifiNetworkDto.GetWifiDtoFromString(lineFromCSV, delimiter);
if (findMethod(nw, wifiDtoFromFile))
{
return(wifiDtoFromFile);
}
}
}
}
wifiDtoFromFile = null;
}
return(wifiDtoFromFile);
}
