/**
* <summary>The addWordWhenRootSoften is used to add word to Trie whose last consonant will be soften.
* For instance, in the case of Dative Case Suffix, the word is 'müzik' when '-e' is added to the word, the last
* char is drooped and root became 'müzi' and by changing 'k' into 'ğ' the word transformed into 'müziğe' as in the
* example of 'Herkes müziğe doğru geldi'.
* In the case of accusative, possessive of third person and a derivative suffix, the word is 'kanat' when '-i' is
* added to word, last char is dropped, root became 'kana' then 't' transformed into 'd' and added to Trie. The word is
* changed into 'kanadı' as in the case of 'Kuşun kırık kanadı'.</summary>
*
* <param name="trie">the name of the Trie to add the word.</param>
* <param name="last">the last char of the word to be soften.</param>
* <param name="root">the substring of the word whose last one or two chars are omitted from the word to bo softed.</param>
* <param name="word">the original word.</param>
*/
private void AddWordWhenRootSoften(Trie.Trie trie, char last, string root, TxtWord word)
{
switch (last)
{
case 'p':
trie.AddWord(root + 'b', word);
break;
case '\u00e7': //ç
trie.AddWord(root + 'c', word);
break;
case 't':
trie.AddWord(root + 'd', word);
break;
case 'k':
case 'g':
trie.AddWord(root + '\u011f', word); //ğ
break;
}
}
/**
* <summary>The prepareTrie method is used to create a Trie with the given dictionary. First, it gets the word from dictionary,
* then checks some exceptions like 'ben' which does not fit in the consonant softening rule and transforms into 'bana',
* and later on it generates a root by removing the last char from the word however if the length of the word is greater
* than 1, it also generates the root by removing the last two chars from the word.
* Then, it gets the last char of the root and adds root and word to the result Trie. There are also special cases such as;
* lastIdropsDuringSuffixation condition, if it is true then addWordWhenRootSoften method will be used rather than addWord.
* Ex : metin + i = metni
* isPortmanteauEndingWithSI condition, if it is true then addWord method with rootWithoutLastTwo will be used.
* Ex : ademelması + lar = ademelmaları
* isPortmanteau condition, if it is true then addWord method with rootWithoutLast will be used.
* Ex : mısıryağı + lar = mısıryağları
* vowelEChangesToIDuringYSuffixation condition, if it is then addWord method with rootWithoutLast will be used
* depending on the last char whether it is 'e' or 'a'.
* Ex : ye + iniz - yiyiniz
* endingKChangesIntoG condition, if it is true then addWord method with rootWithoutLast will be used with added 'g'.
* Ex : ahenk + i = ahengi</summary>
*
* <returns>the resulting Trie.</returns>
*/
public Trie.Trie PrepareTrie()
{
Trie.Trie result = new Trie.Trie();
String root, rootWithoutLast, rootWithoutLastTwo;
char last, lastBefore = ' ';
int length;
for (int i = 0; i < Size(); i++)
{
TxtWord word = (TxtWord)GetWord(i);
root = word.GetName();
length = root.Length;
if (root == "ben")
{
result.AddWord("bana", word);
}
if (root == "sen")
{
result.AddWord("sana", word);
}
rootWithoutLast = root.Substring(0, length - 1);
if (length > 1)
{
rootWithoutLastTwo = root.Substring(0, length - 2);
}
else
{
rootWithoutLastTwo = "";
}
if (length > 1)
{
lastBefore = root[length - 2];
}
last = root[length - 1];
result.AddWord(root, word);
if (word.LastIdropsDuringSuffixation() || word.LastIdropsDuringPassiveSuffixation())
{
if (word.RootSoftenDuringSuffixation())
{
AddWordWhenRootSoften(result, last, rootWithoutLastTwo, word);
}
else
{
result.AddWord(rootWithoutLastTwo + last, word);
}
}
// NominalRootNoPossessive
if (word.IsPortmanteauEndingWithSI())
{
result.AddWord(rootWithoutLastTwo, word);
}
if (word.RootSoftenDuringSuffixation())
{
AddWordWhenRootSoften(result, last, rootWithoutLast, word);
}
if (word.IsPortmanteau())
{
if (word.IsPortmanteauFacedVowelEllipsis())
{
result.AddWord(rootWithoutLastTwo + last + lastBefore, word);
}
else
{
if (word.IsPortmanteauFacedSoftening())
{
switch (lastBefore)
{
case 'b':
result.AddWord(rootWithoutLastTwo + 'p', word);
break;
case 'c':
result.AddWord(rootWithoutLastTwo + 'ç', word);
break;
case 'd':
result.AddWord(rootWithoutLastTwo + 't', word);
break;
case 'ğ':
result.AddWord(rootWithoutLastTwo + 'k', word);
break;
}
}
else
{
result.AddWord(rootWithoutLast, word);
}
}
}
if (word.VowelEChangesToIDuringYSuffixation() || word.VowelAChangesToIDuringYSuffixation())
{
switch (last)
{
case 'e':
result.AddWord(rootWithoutLast, word);
break;
case 'a':
result.AddWord(rootWithoutLast, word);
break;
}
}
if (word.EndingKChangesIntoG())
{
result.AddWord(rootWithoutLast + 'g', word);
}
}
return(result);
}