/// <summary>
/// Checks if a number follows the specified <code>token</code>
/// </summary>
/// <param name="category">the category to set if a number follows the <code>token</code></param>
/// <param name="token">the token</param>
/// <returns>true if a number follows the token; false otherwise</returns>
private bool NumberComesAfterPrefix(Element.ElementCategory category, Token token)
{
var numberBegin = ParserHelper.IndexOfFirstDigit(token.Content);
var prefix = StringHelper.SubstringWithCheck(token.Content, 0, numberBegin).ToUpperInvariant();
if (!KeywordManager.Contains(category, prefix))
{
return(false);
}
var number = StringHelper.SubstringWithCheck(token.Content, numberBegin, token.Content.Length - numberBegin);
switch (category)
{
case Element.ElementCategory.ElementEpisodePrefix:
if (!MatchEpisodePatterns(number, token))
{
SetEpisodeNumber(number, token, false);
}
return(true);
case Element.ElementCategory.ElementVolumePrefix:
if (!MatchVolumePatterns(number, token))
{
SetVolumeNumber(number, token, false);
}
return(true);
default:
return(false);
}
}
/// <summary>
/// Match type and episode. e.g. "ED1", "OP4a", "OVA2".
/// </summary>
/// <param name="word">the word</param>
/// <param name="token">the token</param>
/// <returns>true if the token matched</returns>
private bool MatchTypeAndEpisodePattern(string word, Token token)
{
var numberBegin = ParserHelper.IndexOfFirstDigit(word);
var prefix = StringHelper.SubstringWithCheck(word, 0, numberBegin);
var category = Element.ElementCategory.ElementAnimeType;
var options = new KeywordOptions();
if (!KeywordManager.FindAndSet(KeywordManager.Normalize(prefix), ref category, ref options))
{
return(false);
}
_parser.Elements.Add(new Element(Element.ElementCategory.ElementAnimeType, prefix));
var number = word.Substring(numberBegin);
if (!MatchEpisodePatterns(number, token) && !SetEpisodeNumber(number, token, true))
{
return(false);
}
var foundIdx = _parser.Tokens.IndexOf(token);
if (foundIdx == -1)
{
return(true);
}
token.Content = number;
_parser.Tokens.Insert(foundIdx,
new Token(options.Identifiable ? Token.TokenCategory.Identifier : Token.TokenCategory.Unknown, prefix, token.Enclosed));
return(true);
}
/// <summary>
/// Removes the extension from the <see cref="filename"/>
/// </summary>
/// <param name="filename">the ref that will be updated with the new filename</param>
/// <param name="extension">the ref that will be updated with the file extension</param>
/// <returns>if the extension was successfully separated from the filename</returns>
private static bool RemoveExtensionFromFilename(ref string filename, ref string extension)
{
int position;
if (string.IsNullOrEmpty(filename) || (position = filename.LastIndexOf('.')) == -1)
{
return(false);
}
/** remove file extension */
extension = filename.Substring(position + 1);
if (extension.Length > 4 || !extension.All(char.IsLetterOrDigit))
{
return(false);
}
/** check if valid anime extension */
var keyword = KeywordManager.Normalize(extension);
if (!KeywordManager.Contains(Element.ElementCategory.ElementFileExtension, keyword))
{
return(false);
}
filename = filename.Substring(0, position);
return(true);
}
/// <summary>
/// Tokenize by looking for known anime identifiers
/// </summary>
/// <param name="enclosed">whether or not the current <code>range</code> is enclosed in braces</param>
/// <param name="range">the token range</param>
private void TokenizeByPreidentified(bool enclosed, TokenRange range)
{
var preidentifiedTokens = new List <TokenRange>();
// Find known anime identifiers
KeywordManager.PeekAndAdd(_filename, range, _elements, preidentifiedTokens);
var offset = range.Offset;
var subRange = new TokenRange(range.Offset, 0);
while (offset < range.Offset + range.Size)
{
foreach (var preidentifiedToken in preidentifiedTokens)
{
if (offset != preidentifiedToken.Offset)
{
continue;
}
if (subRange.Size > 0)
{
TokenizeByDelimiters(enclosed, subRange);
}
AddToken(Token.TokenCategory.Identifier, enclosed, preidentifiedToken);
subRange.Offset = preidentifiedToken.Offset + preidentifiedToken.Size;
offset = subRange.Offset - 1; // It's going to be incremented below
}
subRange.Size = ++offset - subRange.Offset;
}
// Either there was no preidentified token range, or we're now about to process the tail of our current range
if (subRange.Size > 0)
{
TokenizeByDelimiters(enclosed, subRange);
}
}