public bool HasCache(string filter = "*")
{
if (_dir == null)
{
_dir = GetCacheFolder();
}
return(_dir?.Files(filter)?.Count > 0);
}
internal D7FileDownloader(string targetDir, string subUrlPattern, IFileSystemShim fsShim, ID7Client d7Client)
{
_client = ForwardLogs(d7Client);
_fs = ForwardLogs(fsShim);
_foldr = _fs.Folder(targetDir);
_urlPattern = subUrlPattern;
_suffix = "_" + DateTime.Now.TimeOfDay.TotalMinutes;
DeleteOldReplacements();
}
internal D7FileDownloader(string targetDir, string subUrlPattern, IFileSystemShim fsShim, ID7Client d7Client)
{
_client = ForwardLogs(d7Client);
_fs = ForwardLogs(fsShim);
_foldr = _fs.Folder(targetDir);
_urlPattern = subUrlPattern;
_suffix = "_" + DateTime.Now.TimeOfDay.TotalMinutes;
DeleteOldReplacements();
}
private void AddToCache <T>(string resource, T result) where T : new()
{
if (_dir == null)
{
_dir = GetCacheFolder();
}
string fName; try
{
fName = GetCacheFileName(resource);
}
catch (Exception ex) { LogError("GetCacheFileName", ex); return; }
FileShim file; try
{
file = _dir.File(fName, false);
}
catch (Exception ex) { LogError("_dir.File", ex); return; }
string json; try
{
json = _serialzr.Write(result, false);
}
catch (Exception ex) { LogError("_serialzr.Write", ex); return; }
if (json.IsBlank())
{
Error_n("json.IsBlank", "");
return;
}
if (file == null)
{
Error_n("file == null", "");
return;
}
if (_fsShim == null)
{
Error_n("_fsShim == null", "");
return;
}
string err = null; try {
file.Write(json, raiseLogEvents: false);
//_fsShim.TryWriteFile(file.Path, out err, json, EncodeAs.UTF8);
}
catch (Exception ex)
{
Error_n("Failed to write file.", file?.Path + L.f + err);
LogError("file.Write", ex);
}
}
public bool ClearCache(string filter = "*")
{
if (_dir == null)
{
_dir = GetCacheFolder();
}
var files = _dir?.Files(filter);
if (files.Count == 0)
{
return(true);
}
return(files.All(x => x.Delete()));
}
protected virtual async Task <T> TryReadCache <T>(string resource) where T : new()
{
if (_dir == null)
{
_dir = GetCacheFolder();
}
var file = _dir.File(GetCacheFileName(resource), false);
if (!file._Found)
{
Debug_n("Resource NOT in cache.", resource);
return(default(T));
}
//Trace_n("Resource is cached.", resource);
var ret = _serialzr.Read <T>(file, false);
await TaskEx.Delay(1);
return(ret);
}
