feat: add api to find urls by user id

src/main/kotlin/com/bgpark/urlshortener/controller/UserController.kt

@@ -0,0 +1,21 @@
+package com.bgpark.urlshortener.controller
+
+import com.bgpark.urlshortener.controller.dto.UrlResponse
+import com.bgpark.urlshortener.repository.db.UrlRepository
+import org.springframework.http.HttpStatus
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.ResponseStatus
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+class UserController(
+    private val urlRepository: UrlRepository
+) {
+
+    @GetMapping("/api/v1/users/{userId}/urls")
+    @ResponseStatus(HttpStatus.OK)
+    fun getUrlByUserId(@PathVariable("userId") userId: Long): List<UrlResponse> {
+        return urlRepository.findAllByUserId(userId).map(::UrlResponse)
+    }
+}

src/main/kotlin/com/bgpark/urlshortener/controller/dto/UrlResponse.kt

@@ -0,0 +1,25 @@
+package com.bgpark.urlshortener.controller.dto
+
+import com.bgpark.urlshortener.domain.Url
+import java.time.LocalDateTime
+
+data class UrlResponse(
+    val id: Long,
+    val longUrl: String,
+    val shortUrl: String,
+    val hash: String,
+    val userId: Long?,
+    val createdAt: LocalDateTime,
+    val updatedAt: LocalDateTime
+) {
+    constructor(url: Url): this(
+        id = url.id,
+        longUrl = url.longUrl,
+        shortUrl = url.shortUrl,
+        hash = url.hash,
+        userId = url.userId,
+        createdAt = url.createdAt!!,
+        updatedAt = url.updatedAt!!,
+    )
+
+}

src/main/kotlin/com/bgpark/urlshortener/repository/db/UrlRepository.kt

@@ -6,4 +6,6 @@ import org.springframework.data.jpa.repository.JpaRepository
 interface UrlRepository : JpaRepository<Url, Long> {
 
     fun findByHash(hash: String): Url?
+
+    fun findAllByUserId(userId: Long): List<Url>
 }