2 files changed, 318 insertions, 5 deletions
diff --git a/engine/src/main/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverter.kt b/engine/src/main/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverter.kt
index 47ab960..1b3c67d 100644
--- a/engine/src/main/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverter.kt
+++ b/engine/src/main/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverter.kt
@@ -20,6 +20,20 @@ object KanaConverter {
     private fun buildTrie(): TrieNode {
         val mappings =
             listOf(
+                // 4文字変換 (x/l prefix small characters)
+                "xtsu" to "っ",
+                "ltsu" to "っ",
+                // 3文字変換 (x/l prefix small characters)
+                "xtu" to "っ",
+                "ltu" to "っ",
+                "xya" to "ゃ",
+                "lya" to "ゃ",
+                "xyu" to "ゅ",
+                "lyu" to "ゅ",
+                "xyo" to "ょ",
+                "lyo" to "ょ",
+                "xwa" to "ゎ",
+                "lwa" to "ゎ",
                 // 3文字変換
                 "kya" to "きゃ",
                 "kyi" to "きぃ",
@@ -104,6 +118,17 @@ object KanaConverter {
                 "whi" to "うぃ",
                 "whe" to "うぇ",
                 "who" to "うぉ",
+                // 2文字変換 (x/l prefix small vowels)
+                "xa" to "ぁ",
+                "la" to "ぁ",
+                "xi" to "ぃ",
+                "li" to "ぃ",
+                "xu" to "ぅ",
+                "lu" to "ぅ",
+                "xe" to "ぇ",
+                "le" to "ぇ",
+                "xo" to "ぉ",
+                "lo" to "ぉ",
                 // 2文字変換
                 "ka" to "か",
                 "ki" to "き",
@@ -181,11 +206,6 @@ object KanaConverter {
                 "wu" to "う",
                 "we" to "ゑ",
                 "wo" to "を",
-                "la" to "ら",
-                "li" to "り",
-                "lu" to "る",
-                "le" to "れ",
-                "lo" to "ろ",
                 "nn" to "ん",
                 // 1文字変換
                 "a" to "あ",
diff --git a/engine/src/test/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverterTest.kt b/engine/src/test/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverterTest.kt
new file mode 100644
index 0000000..a348fa3
--- /dev/null
+++ b/engine/src/test/kotlin/dev/m1sk9/lunaticChat/engine/converter/KanaConverterTest.kt
@@ -0,0 +1,293 @@
+package dev.m1sk9.lunaticChat.engine.converter
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class KanaConverterTest {
+    @Test
+    fun `should convert single vowels to hiragana`() {
+        assertEquals("あ", KanaConverter.toHiragana("a"))
+        assertEquals("い", KanaConverter.toHiragana("i"))
+        assertEquals("う", KanaConverter.toHiragana("u"))
+        assertEquals("え", KanaConverter.toHiragana("e"))
+        assertEquals("お", KanaConverter.toHiragana("o"))
+    }
+
+    @Test
+    fun `should convert basic ka-row consonants to hiragana`() {
+        assertEquals("か", KanaConverter.toHiragana("ka"))
+        assertEquals("き", KanaConverter.toHiragana("ki"))
+        assertEquals("く", KanaConverter.toHiragana("ku"))
+        assertEquals("け", KanaConverter.toHiragana("ke"))
+        assertEquals("こ", KanaConverter.toHiragana("ko"))
+    }
+
+    @Test
+    fun `should convert simple word konnichiwa to hiragana`() {
+        assertEquals("こんいちわ", KanaConverter.toHiragana("konnichiwa"))
+    }
+
+    @Test
+    fun `should convert simple word arigatou to hiragana`() {
+        assertEquals("ありがとう", KanaConverter.toHiragana("arigatou"))
+    }
+
+    @Test
+    fun `should convert xtsu and ltsu to small tsu`() {
+        assertEquals("っ", KanaConverter.toHiragana("xtsu"))
+        assertEquals("っ", KanaConverter.toHiragana("ltsu"))
+    }
+
+    @Test
+    fun `should convert xtu and ltu to small tsu`() {
+        assertEquals("っ", KanaConverter.toHiragana("xtu"))
+        assertEquals("っ", KanaConverter.toHiragana("ltu"))
+    }
+
+    @Test
+    fun `should convert xa and la to small a`() {
+        assertEquals("ぁ", KanaConverter.toHiragana("xa"))
+        assertEquals("ぁ", KanaConverter.toHiragana("la"))
+    }
+
+    @Test
+    fun `should convert xi and li to small i`() {
+        assertEquals("ぃ", KanaConverter.toHiragana("xi"))
+        assertEquals("ぃ", KanaConverter.toHiragana("li"))
+    }
+
+    @Test
+    fun `should convert xu and lu to small u`() {
+        assertEquals("ぅ", KanaConverter.toHiragana("xu"))
+        assertEquals("ぅ", KanaConverter.toHiragana("lu"))
+    }
+
+    @Test
+    fun `should convert xe and le to small e`() {
+        assertEquals("ぇ", KanaConverter.toHiragana("xe"))
+        assertEquals("ぇ", KanaConverter.toHiragana("le"))
+    }
+
+    @Test
+    fun `should convert xo and lo to small o`() {
+        assertEquals("ぉ", KanaConverter.toHiragana("xo"))
+        assertEquals("ぉ", KanaConverter.toHiragana("lo"))
+    }
+
+    @Test
+    fun `should convert xya and lya to small ya`() {
+        assertEquals("ゃ", KanaConverter.toHiragana("xya"))
+        assertEquals("ゃ", KanaConverter.toHiragana("lya"))
+    }
+
+    @Test
+    fun `should convert xyu and lyu to small yu`() {
+        assertEquals("ゅ", KanaConverter.toHiragana("xyu"))
+        assertEquals("ゅ", KanaConverter.toHiragana("lyu"))
+    }
+
+    @Test
+    fun `should convert xyo and lyo to small yo`() {
+        assertEquals("ゃ", KanaConverter.toHiragana("xya"))
+        assertEquals("ゃ", KanaConverter.toHiragana("lya"))
+    }
+
+    @Test
+    fun `should convert xwa and lwa to small wa`() {
+        assertEquals("ゎ", KanaConverter.toHiragana("xwa"))
+        assertEquals("ゎ", KanaConverter.toHiragana("lwa"))
+    }
+
+    @Test
+    fun `should convert user example - are kore op xtute raxtuka de shinanai question`() {
+        assertEquals("って", KanaConverter.toHiragana("xtute"))
+        assertEquals("らっか", KanaConverter.toHiragana("raxtuka"))
+
+        val input = "are kore op xtute raxtuka de shinanai ?"
+        val expected = "あれ これ おp って らっか で しなない ?"
+        val actual = KanaConverter.toHiragana(input)
+
+        assertEquals(expected, actual)
+    }
+
+    @Test
+    fun `should convert xtute to tte using x prefix`() {
+        assertEquals("って", KanaConverter.toHiragana("xtute"))
+    }
+
+    @Test
+    fun `should convert raxtuka to rakka with small tsu`() {
+        assertEquals("らっか", KanaConverter.toHiragana("raxtuka"))
+    }
+
+    @Test
+    fun `should convert double consonants to small tsu`() {
+        assertEquals("きって", KanaConverter.toHiragana("kitte"))
+        assertEquals("がっこう", KanaConverter.toHiragana("gakkou"))
+        assertEquals("ずっと", KanaConverter.toHiragana("zutto"))
+        assertEquals("さっぱり", KanaConverter.toHiragana("sappari"))
+    }
+
+    @Test
+    fun `should handle double t as small tsu`() {
+        assertEquals("まった", KanaConverter.toHiragana("matta"))
+    }
+
+    @Test
+    fun `should handle double k as small tsu`() {
+        assertEquals("がっき", KanaConverter.toHiragana("gakki"))
+    }
+
+    @Test
+    fun `should handle double p as small tsu`() {
+        assertEquals("いっぱい", KanaConverter.toHiragana("ippai"))
+    }
+
+    @Test
+    fun `should convert kya-row to hiragana`() {
+        assertEquals("きゃ", KanaConverter.toHiragana("kya"))
+        assertEquals("きゅ", KanaConverter.toHiragana("kyu"))
+        assertEquals("きょ", KanaConverter.toHiragana("kyo"))
+    }
+
+    @Test
+    fun `should convert sha-row to hiragana`() {
+        assertEquals("しゃ", KanaConverter.toHiragana("sha"))
+        assertEquals("しゅ", KanaConverter.toHiragana("shu"))
+        assertEquals("しょ", KanaConverter.toHiragana("sho"))
+    }
+
+    @Test
+    fun `should convert cha-row to hiragana`() {
+        assertEquals("ちゃ", KanaConverter.toHiragana("cha"))
+        assertEquals("ちゅ", KanaConverter.toHiragana("chu"))
+        assertEquals("ちょ", KanaConverter.toHiragana("cho"))
+    }
+
+    @Test
+    fun `should convert nya-row to hiragana`() {
+        assertEquals("にゃ", KanaConverter.toHiragana("nya"))
+        assertEquals("にゅ", KanaConverter.toHiragana("nyu"))
+        assertEquals("にょ", KanaConverter.toHiragana("nyo"))
+    }
+
+    @Test
+    fun `should convert hya-row to hiragana`() {
+        assertEquals("ひゃ", KanaConverter.toHiragana("hya"))
+        assertEquals("ひゅ", KanaConverter.toHiragana("hyu"))
+        assertEquals("ひょ", KanaConverter.toHiragana("hyo"))
+    }
+
+    @Test
+    fun `should convert mya-row to hiragana`() {
+        assertEquals("みゃ", KanaConverter.toHiragana("mya"))
+        assertEquals("みゅ", KanaConverter.toHiragana("myu"))
+        assertEquals("みょ", KanaConverter.toHiragana("myo"))
+    }
+
+    @Test
+    fun `should convert rya-row to hiragana`() {
+        assertEquals("りゃ", KanaConverter.toHiragana("rya"))
+        assertEquals("りゅ", KanaConverter.toHiragana("ryu"))
+        assertEquals("りょ", KanaConverter.toHiragana("ryo"))
+    }
+
+    @Test
+    fun `should convert gya-row to hiragana`() {
+        assertEquals("ぎゃ", KanaConverter.toHiragana("gya"))
+        assertEquals("ぎゅ", KanaConverter.toHiragana("gyu"))
+        assertEquals("ぎょ", KanaConverter.toHiragana("gyo"))
+    }
+
+    @Test
+    fun `should convert ja-row to hiragana`() {
+        assertEquals("じゃ", KanaConverter.toHiragana("ja"))
+        assertEquals("じ", KanaConverter.toHiragana("ji"))
+        assertEquals("じゅ", KanaConverter.toHiragana("ju"))
+        assertEquals("じょ", KanaConverter.toHiragana("jo"))
+    }
+
+    @Test
+    fun `should return empty string for empty input`() {
+        assertEquals("", KanaConverter.toHiragana(""))
+    }
+
+    @Test
+    fun `should pass through non-romanji characters unchanged`() {
+        assertEquals("123", KanaConverter.toHiragana("123"))
+        assertEquals("!", KanaConverter.toHiragana("!"))
+        assertEquals("?", KanaConverter.toHiragana("?"))
+    }
+
+    @Test
+    fun `should handle mixed romanji and non-romanji`() {
+        assertEquals("あ123い", KanaConverter.toHiragana("a123i"))
+    }
+
+    @Test
+    fun `should handle uppercase input by converting to lowercase first`() {
+        assertEquals("か", KanaConverter.toHiragana("KA"))
+        assertEquals("きゃ", KanaConverter.toHiragana("KYA"))
+    }
+
+    @Test
+    fun `should handle mixed case input`() {
+        assertEquals("こんいちわ", KanaConverter.toHiragana("KoNnIcHiWa"))
+    }
+
+    @Test
+    fun `should convert n to n-sound correctly`() {
+        assertEquals("ん", KanaConverter.toHiragana("n"))
+        assertEquals("ん", KanaConverter.toHiragana("nn"))
+    }
+
+    @Test
+    fun `should handle tsu correctly`() {
+        assertEquals("つ", KanaConverter.toHiragana("tsu"))
+    }
+
+    @Test
+    fun `should handle chi and shi correctly`() {
+        assertEquals("ち", KanaConverter.toHiragana("chi"))
+        assertEquals("し", KanaConverter.toHiragana("shi"))
+    }
+
+    @Test
+    fun `should handle fu correctly`() {
+        assertEquals("ふ", KanaConverter.toHiragana("fu"))
+        assertEquals("ふ", KanaConverter.toHiragana("hu"))
+    }
+
+    @Test
+    fun `should handle wo and wa correctly`() {
+        assertEquals("を", KanaConverter.toHiragana("wo"))
+        assertEquals("わ", KanaConverter.toHiragana("wa"))
+    }
+
+    @Test
+    fun `should convert common greeting ohayou`() {
+        assertEquals("おはよう", KanaConverter.toHiragana("ohayou"))
+    }
+
+    @Test
+    fun `should convert common word sumimasen`() {
+        assertEquals("すみません", KanaConverter.toHiragana("sumimasen"))
+    }
+
+    @Test
+    fun `should convert phrase with double consonants`() {
+        assertEquals("がんばって", KanaConverter.toHiragana("ganbatte"))
+    }
+
+    @Test
+    fun `should convert phrase with small ya-row`() {
+        assertEquals("きゃべつ", KanaConverter.toHiragana("kyabetsu"))
+    }
+
+    @Test
+    fun `should handle long phrase with various patterns`() {
+        val input = "watashi wa nihongo wo benkyou shiteimasu"
+        val expected = "わたし わ にほんご を べんきょう しています"
+        assertEquals(expected, KanaConverter.toHiragana(input))
+    }
+}