fix: JSON 안전 범위 초과시 값이 유실되는 문제 수정 (#104)

src/main/kotlin/kr/wooco/woocobe/common/ui/config/JacksonConfig.kt

@@ -1,22 +1,51 @@
 package kr.wooco.woocobe.common.ui.config
 
+import com.fasterxml.jackson.core.JsonGenerator
 import com.fasterxml.jackson.databind.DeserializationFeature
+import com.fasterxml.jackson.databind.JsonSerializer
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.PropertyNamingStrategies
 import com.fasterxml.jackson.databind.SerializationFeature
+import com.fasterxml.jackson.databind.SerializerProvider
+import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
+import kotlin.math.abs
+import kotlin.math.pow
 
 @Configuration
 class JacksonConfig {
     @Bean
     fun objectMapper(): ObjectMapper =
         jacksonObjectMapper().apply {
             propertyNamingStrategy = PropertyNamingStrategies.SNAKE_CASE
-            registerModule(JavaTimeModule())
             disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
             configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+            registerModules(JavaTimeModule(), optimizedStringSerializerModule())
         }
+
+    private fun optimizedStringSerializerModule(): SimpleModule =
+        SimpleModule().apply {
+            addSerializer(Long::class.java, OptimizedLongSerializer)
+        }
+
+    data object OptimizedLongSerializer : JsonSerializer<Long>() {
+        override fun serialize(
+            value: Long,
+            gen: JsonGenerator,
+            serializers: SerializerProvider,
+        ) {
+            if (abs(value) > THRESHOLD) {
+                gen.writeString(value.toString())
+            } else {
+                gen.writeNumber(value)
+            }
+        }
+    }
+
+    companion object {
+        private val THRESHOLD = 2.0.pow(53.0)
+    }
 }