follow period message fix done.

src/main/kotlin/space/mori/chzzk_bot/chzzk/ChzzkApis.kt

@@ -16,14 +16,33 @@ data class IFollowContent(
     val nickname: String = "",
     val profileImageUrl: String = "",
     val userRoleCode: String = "",
-    val badge: String? = null,
-    val title: String? = null,
+    val badge: Badge? = null,
+    val title: Title? = null,
     val verifiedMark: Boolean = false,
     val activityBadges: List<String> = emptyList(),
-    val streamingProperty: Map<String, String> = mapOf(
-        "following" to "",
-        "nicknameColor" to ""
-    )
+    val streamingProperty: StreamingProperty = StreamingProperty()
+)
+
+data class Badge(
+    val imageUrl: String = ""
+)
+
+data class Title(
+    val name: String = "",
+    val color: String = ""
+)
+
+data class StreamingProperty(
+    val following: Following? = Following(),
+    val nicknameColor: NicknameColor = NicknameColor()
+)
+
+data class Following(
+    val followDate: String? = null
+)
+
+data class NicknameColor(
+    val colorCode: String = ""
 )
 
 val client = OkHttpClient()
@@ -38,7 +57,8 @@ fun getFollowDate(chatID: String, userId: String) : IFollow {
     client.newCall(request).execute().use { response ->
         try {
             if(!response.isSuccessful) throw IOException("Unexpected code ${response.code}")
-            val follow = gson.fromJson(response.body?.string(), IFollow::class.java)
+            val body = response.body?.string()
+            val follow = gson.fromJson(body, IFollow::class.java)
 
             return follow
         } catch(e: Exception) {

src/main/kotlin/space/mori/chzzk_bot/chzzk/MessageHandler.kt

@@ -8,10 +8,11 @@ import space.mori.chzzk_bot.services.UserService
 import xyz.r2turntrue.chzzk4j.chat.ChatMessage
 import xyz.r2turntrue.chzzk4j.chat.ChzzkChat
 import xyz.r2turntrue.chzzk4j.types.channel.ChzzkChannel
+import java.text.SimpleDateFormat
 import java.time.LocalDate
 import java.time.Period
 import java.time.format.DateTimeFormatter
-
+import java.util.*
 
 
 class MessageHandler(
@@ -90,17 +91,17 @@ class MessageHandler(
 
         result = followPattern.replace(result) {
             val following = getFollowDate(listener.chatId, msg.userId)
-            val dateString: String? = following.content.streamingProperty["followDate"]
+            val dateString: String = following.content.streamingProperty.following?.followDate ?: SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(
+                Date()
+            )
             val today = LocalDate.now()
 
-            if(dateString == null) {
-                val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
-                // 문자열을 LocalDate 객체로 변환
-                val pastDate = LocalDate.parse(dateString, formatter)
+            val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
+            // 문자열을 LocalDate 객체로 변환
+            val pastDate = LocalDate.parse(dateString, formatter)
 
-                val period = Period.between(pastDate, today)
-                period.days.toString()
-            } else ""
+            val period = Period.between(pastDate, today)
+            period.days.toString()
         }
         if(isFail) {
             return chat.second