Implemente LocalRepository using SharedPrefences

app/src/main/java/chat/rocket/android/infrastructure/LocalRepository.kt

+package chat.rocket.android.infrastructure
+
+interface LocalRepository {
+
+    companion object {
+        val KEY_PUSH_TOKEN = "KEY_PUSH_TOKEN"
+    }
+
+    fun save(key: String, value: String?)
+
+    fun get(key: String): String?
+}
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app/src/main/java/chat/rocket/android/infrastructure/SharedPreferencesRepository.kt

+package chat.rocket.android.infrastructure
+
+import android.content.Context
+import android.content.SharedPreferences
+
+class SharedPreferencesRepository(context: Context) : LocalRepository {
+
+    val preferences: SharedPreferences
+
+    init {
+        preferences = context.getSharedPreferences("local.prefs", Context.MODE_PRIVATE)
+    }
+
+    override fun save(key: String, value: String?) {
+        preferences.edit().putString(key, value).apply()
+    }
+
+    override fun get(key: String): String? {
+        return preferences.getString(key, null)
+    }
+}
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