public static async Task <PostPiece[]> ParseToPost(SourceType sourceType, string source)
{
var text = sourceType switch {
SourceType.Link => await WebUtils.DownloadString(source),
_ => source,
};
//Parse emotes
text = regexEmotes.Replace(text, match => BotUtils.TryGetEmote(match.Groups[1].Value, out string emoteText) ? emoteText : match.Value);
var postPieces = new List <PostPiece> {
new TextPostPiece(text)
};
int tagsParsed = 0;
for (int i = 0; i < postPieces.Count; i++)
{
var piece = postPieces[i];
if (piece.GetType() != typeof(TextPostPiece) || !(piece is TextPostPiece textPiece))
{
continue;
}
var match = regexTags.Match(textPiece.text);
if (!match.Success)
{
continue;
}
if (textPiece.text == null)
{
throw new BotError($"textPiece.text is null, i is {i}");
}
int matchIndex = match.Index;
string type = match.Groups[1].Value.ToLower();
textPiece.text = textPiece.text.Remove(matchIndex, match.Value.Length);
string GetGroup(int index)
{
var group = match.Groups[index];
if (!group.Success)
{
throw new BotError($"Failed to parse tag #{1+tagsParsed} ({type}): Missing group #{index}.");
}
return(group.Value);
}
bool split = false;
PostPiece newPiece = null;
switch (type)
{
case "split":
split = true;
break;
case "image":
string url = GetGroup(2);
string filename = BotUtils.GetValidFileName($"TempFile_{url}");
await WebUtils.DownloadFile(GetGroup(2), filename);
newPiece = new FilePostPiece(filename, true);
split = true;
break;
default:
throw new BotError($"Invalid tag type: '{type}'.");
}
tagsParsed++;
if (split)
{
string leftText = matchIndex >= textPiece.text.Length ? null : textPiece.text.Remove(matchIndex);
string rightText = matchIndex >= textPiece.text.Length ? null : textPiece.text.Substring(matchIndex);
if (rightText == null)
{
if (newPiece != null)
{
postPieces[i] = newPiece;
}
continue;
}
if (string.IsNullOrWhiteSpace(leftText))
{
if (newPiece != null)
{
postPieces.Insert(i, newPiece);
}
textPiece.text = rightText;
}
else
{
textPiece.text = leftText;
if (newPiece != null)
{
postPieces.Add(newPiece);
}
postPieces.Add(new TextPostPiece(rightText));
}
}
}
return(postPieces.ToArray());
}
