/// <summary>Translate file open flags from System.IO into pCloud's Linux-friendly variant.</summary>
static eFileOpenFlags openFlags(FileMode mode, FileAccess access)
{
if (access == FileAccess.Read)
{
if (mode != FileMode.Open)
{
throw new ArgumentException("File mode incompatible with Read access");
}
return(eFileOpenFlags.None);
}
eFileOpenFlags flags = eFileOpenFlags.O_WRITE;
switch (mode)
{
case FileMode.CreateNew:
flags |= eFileOpenFlags.O_CREAT | eFileOpenFlags.O_EXCL;
break;
case FileMode.Create:
flags |= eFileOpenFlags.O_CREAT | eFileOpenFlags.O_TRUNC;
break;
case FileMode.Open:
break;
case FileMode.OpenOrCreate:
flags |= eFileOpenFlags.O_CREAT;
break;
case FileMode.Truncate:
flags |= eFileOpenFlags.O_TRUNC;
break;
case FileMode.Append:
flags |= eFileOpenFlags.O_APPEND;
break;
}
return(flags);
}
/// <summary>Open file, return the descriptor</summary>
static async Task <FileDescriptor> createFileImpl(this Connection conn, object pathOrId, eFileOpenFlags flags)
{
RequestBuilder req = conn.newRequest("file_open");
req.add("flags", (long)flags);
if (pathOrId is long id)
{
req.add("fileid", id);
}
else if (pathOrId is string path)
{
req.add("path", path);
}
else
{
throw new ArgumentException("Session.openFile expects either long id, or string path");
}
var response = await conn.send(req);
return(new FileDescriptor(response.dict));
}
/// <summary>Open an existing file specified by file ID</summary>
public static Task <FileDescriptor> createFile(this Connection conn, long fileId, FileMode mode, FileAccess access)
{
eFileOpenFlags flags = openFlags(mode, access);
return(conn.createFileImpl(fileId, flags));
}
