private bool TryParseBook(string scriptureString,
string language,
out BibleBook book,
out string chapterVerse,
out VerseParseResult result)
{
//TODO: Check for language validity so we don't end up with a vague null exception
book = null;
chapterVerse = null;
result = VerseParseResult.InvalidVerse;
// attempt to extract the book from the start of the string
foreach (var bibleBook in _bibleBookProvider.BibleBooks)
{
foreach (var name in bibleBook.GetAllIdentifiersForLanguage(language))
{
if (scriptureString.StartsWith(name.ToLowerInvariant() + " "))
{
book = bibleBook;
chapterVerse = scriptureString.Substring(name.Length).Trim();
result = VerseParseResult.Success;
return(true);
}
}
}
return(false);
}
private bool TryParseVerse(string verseString,
BibleChapter chapter,
out int startVerse,
out int endVerse,
out VerseParseResult result)
{
startVerse = 0;
endVerse = 0;
result = VerseParseResult.InvalidSyntax;
if (!string.IsNullOrWhiteSpace(verseString))
{
var startVerseString = Regex.Match(verseString, "\\d+").Value;
if (int.TryParse(startVerseString, out startVerse))
{
if (startVerse > chapter.TotalVerses)
{
// start verse is greater than the number of verses in the chapter
result = VerseParseResult.InvalidVerse;
}
else
{
var endVerseString = Regex.Match(verseString, "[-,]\\d+").Value.Replace("-", "").Replace(",", "");
if (!string.IsNullOrEmpty(endVerseString))
{
if (int.TryParse(endVerseString, out int tempEndVerse))
{
if (tempEndVerse > chapter.TotalVerses)
{
// the end verse is greater than the number of verses in the chapter
result = VerseParseResult.InvalidVerse;
}
else if (tempEndVerse < 1 || (verseString.Contains(",") && tempEndVerse != (startVerse + 1)))
{
// end verse is 0 or there were two non-sequential verses separated by a comma
result = VerseParseResult.InvalidSyntax;
}
else
{
endVerse = tempEndVerse;
result = VerseParseResult.Success;
}
}
}
else
{
// no end verse specified, so use the start as the end
endVerse = startVerse;
result = VerseParseResult.Success;
}
}
}
}
return(result == VerseParseResult.Success);
}
private bool TryParseChapter(string chapterVerse,
BibleBook book,
out BibleChapter chapter,
out string verseString,
out VerseParseResult result)
{
chapter = null;
verseString = null;
result = VerseParseResult.InvalidSyntax;
if (book.IsSingleChapter)
{
chapter = book.Chapters.FirstOrDefault();
verseString = chapterVerse;
result = VerseParseResult.Success;
}
else
{
var chapterStr = Regex.Match(chapterVerse, @"\d+:").Value;
if (!string.IsNullOrEmpty(chapterStr))
{
var chapterNum = int.Parse(chapterStr.Replace(":", "").Trim());
if (chapterNum > 0 && chapterNum <= book.Chapters.Count)
{
chapter = book.SortedChapters[chapterNum - 1];
verseString = chapterVerse.Substring(chapterVerse.IndexOf(":") + 1).Trim();
result = VerseParseResult.Success;
}
else
{
result = VerseParseResult.InvalidVerse;
}
}
}
return(result == VerseParseResult.Success);
}
