/// <summary>
/// Write current message metadata state to the index file.
/// </summary>
/// <param name="open">Indicates whether the file should be marked as OPEN or CLOSED.</param>
private void SaveIndex(bool open)
{
fsIndex.Position = 0;
fsIndex.SetLength(0);
// Write the header
fsIndex.WriteInt32(IndexMagic); // Magic Number
fsIndex.WriteInt32(0); // Format Version
fsIndex.WriteInt32(0); // Reserved
fsIndex.WriteInt32(0); // Open Flag
fsIndex.WriteInt32(messages.Count); // Message Count
// Write the metadata.
foreach (QueuedMsgInfo msgInfo in messages.Values)
{
fsIndex.WriteString16(msgInfo.ToString());
fsIndex.WriteString16(((string)msgInfo.ProviderData).Substring(root.Length)); // Make the saved path relative
}
fsIndex.Position = OpenFlagOffset;
fsIndex.WriteInt32(open ? 1 : 0);
fsIndex.Flush();
}
/// <summary>
/// Writes a message file.
/// </summary>
/// <param name="path">The file path.</param>
/// <param name="msg">The message.</param>
/// <param name="msgInfo">The message metadata.</param>
internal void WriteMessage(string path, QueuedMsg msg, QueuedMsgInfo msgInfo)
{
byte[] md5Hash;
using (var fsMsg = new EnhancedFileStream(path, FileMode.Create, FileAccess.ReadWrite))
{
// Write the file header
fsMsg.WriteInt32(MsgMagic); // Magic Number
fsMsg.WriteInt32(0); // Format Version
fsMsg.WriteInt32(0); // Reserved
fsMsg.WriteBytesNoLen(md5Zeros); // MD5 hash placeholder
// Write the message body.
fsMsg.WriteBytes32(msg.BodyRaw);
// Write the metadata.
fsMsg.WriteString16(msgInfo.ToString());
// Compute and save the MD5 hash
fsMsg.Position = MsgHeaderSize;
md5Hash = MD5Hasher.Compute(fsMsg, fsMsg.Length - fsMsg.Position);
fsMsg.Position = MsgMD5Offset;
fsMsg.WriteBytesNoLen(md5Hash);
}
}
/// <summary>
/// Updates a message file's metadata.
/// </summary>
/// <param name="path">The file path.</param>
/// <param name="msgInfo">The message metadata.</param>
internal void WriteMessageMetadata(string path, QueuedMsgInfo msgInfo)
{
using (var fsMsg = new EnhancedFileStream(path, FileMode.Open, FileAccess.ReadWrite))
{
// Seek past the message's header and body.
int cbBody;
byte[] md5Hash;
fsMsg.Position = MsgHeaderSize;
cbBody = fsMsg.ReadInt32();
fsMsg.Position = fsMsg.Position + cbBody;
// Write the metadata and truncate the file.
fsMsg.WriteString16(msgInfo.ToString());
fsMsg.SetLength(fsMsg.Position);
// Regenerate the MD5 Hash
fsMsg.Position = MsgMD5Offset + MD5Hasher.DigestSize;
md5Hash = MD5Hasher.Compute(fsMsg, fsMsg.Length - fsMsg.Position);
fsMsg.Position = MsgMD5Offset;
fsMsg.WriteBytesNoLen(md5Hash);
}
}
/// <summary>
/// Writes the index file.
/// </summary>
/// <param name="path">The target file path.</param>
/// <param name="phrases">The phrases to be written.</param>
private void SaveIndexTo(string path, Phrase[] phrases)
{
using (var fs = new EnhancedFileStream(path, FileMode.Create))
{
fs.WriteInt32(Magic);
fs.WriteInt32(phrases.Length);
foreach (var phrase in phrases)
{
fs.WriteString16(phrase.PhraseType.ToString());
fs.WriteString32(phrase.Text);
fs.WriteString16(phrase.Voice);
fs.WriteString16(phrase.ActualVoice);
fs.WriteString16(phrase.Encoding.ToString());
fs.WriteString16(phrase.SampleRate.ToString());
fs.WriteInt64(phrase.LastAccessUtc.Ticks);
fs.WriteString16(phrase.Path);
}
}
}