feat: shardPref 에 object 넣기 Util 화

android/festago/data/src/main/java/com/festago/festago/data/util/SharedPrefExt.kt

@@ -0,0 +1,14 @@
+package com.festago.festago.data.util
+
+import android.content.SharedPreferences
+import com.google.gson.GsonBuilder
+
+inline fun <reified T> SharedPreferences.putObject(key: String, value: T?) {
+    val jsonString = GsonBuilder().create().toJson(value)
+    edit().putString(key, jsonString).apply()
+}
+
+inline fun <reified T> SharedPreferences.getObject(key: String, default: T?): T? {
+    val value = getString(key, null) ?: return default
+    return GsonBuilder().create().fromJson(value, T::class.java)
+}