public IEnumerable <string> GetSyllables(string word)
{
List <string> syllables = new List <string>();
if (string.IsNullOrWhiteSpace(word))
{
return(syllables);
}
word = word.Trim()
.ToLower();
if (!SyllablesService.IsValidWord(word))
{
throw new ArgumentException(string.Format("Word \"{0}\" is invalid.", word), "word");
}
int start = 0;
int end = 1;
while (end < word.Length)
{
switch (SyllablesService.GetCuttingMode(word, end))
{
case SyllableCuttingMode.Current:
{
if (end - start - 1 > 0 &&
SyllablesService.DoesWordContainVowel(word.Substring(start, end - start - 1)))
{
syllables.Add(word.Substring(start, end - start - 1));
start = end - 1;
}
break;
}
case SyllableCuttingMode.Next:
{
if (SyllablesService.DoesWordContainVowel(word.Substring(start, end - start)))
{
syllables.Add(word.Substring(start, end - start));
start = end;
}
break;
}
}
end++;
}
if (!SyllablesService.DoesWordContainVowel(word.Substring(start)) && syllables.Count - 1 >= 0)
{
syllables[syllables.Count - 1] += word.Substring(start);
}
else
{
syllables.Add(word.Substring(start));
}
return(syllables);
}
private static ConsonantType GetConsonantType(char c)
{
if (!SyllablesService.IsConsonant(c))
{
throw new ArgumentException(string.Format("Char '{0}' is not a consonant.", c), "c");
}
if (SyllablesService.sonorouses.Contains(c))
{
return(ConsonantType.Sonorous);
}
return(SyllablesService.sibilants.Contains(c) ? ConsonantType.Sibilant : ConsonantType.Obstruents);
}
private static SyllableCuttingMode GetCuttingMode(string word, int index)
{
char firstChar = word[index - 1] != 'ь' ? word[index - 1] : word[index - 2];
char secondChar = word[index];
// Rule #1
if (index + 1 < word.Length)
{
char thirdChar = word[index + 1] != '\'' ? word[index + 1] : word[index + 2];
if (SyllablesService.IsVowel(firstChar) && SyllablesService.IsConsonant(secondChar) &&
SyllablesService.IsVowel(thirdChar))
{
return(SyllableCuttingMode.Next);
}
}
if (SyllablesService.IsConsonant(firstChar) && SyllablesService.IsConsonant(secondChar))
{
// Rule #6
if (firstChar == secondChar)
{
return(SyllableCuttingMode.Current);
}
if (SyllablesService.GetConsonantType(firstChar) == SyllablesService.GetConsonantType(secondChar))
{
// Rule #5
if (SyllablesService.GetConsonantType(firstChar) == ConsonantType.Sonorous)
{
return(SyllableCuttingMode.Next);
}
return(SyllableCuttingMode.Current);
}
if (SyllablesService.GetConsonantType(secondChar) == ConsonantType.Obstruents) // Rule #3
{
return(SyllableCuttingMode.Next);
}
if (SyllablesService.GetConsonantType(secondChar) == ConsonantType.Sonorous) // Rule #4
{
return(SyllableCuttingMode.Current);
}
}
else if (SyllablesService.IsVowel(firstChar) && SyllablesService.IsVowel(secondChar))
{
return(SyllableCuttingMode.Next);
}
return(SyllableCuttingMode.Skip);
}
public void Init()
{
this._syllablesService = new SyllablesService();
}