getUserName path implemented

backend/internal/handlers/users/GetUserName.go

@@ -0,0 +1,32 @@
+package users
+
+import (
+	"strconv"
+	db "ttime/internal/database"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+// Return the username of a user given their user id
+func GetUserName(c *fiber.Ctx) error {
+	// Check the query params for userId
+	user_id_string := c.Query("userId")
+	if user_id_string == "" {
+		return c.Status(400).SendString("Missing user id")
+	}
+
+	// Convert to int
+	user_id, err := strconv.Atoi(user_id_string)
+	if err != nil {
+		return c.Status(400).SendString("Invalid user id")
+	}
+
+	// Get the username from the database
+	username, err := db.GetDb(c).GetUserName(user_id)
+	if err != nil {
+		return c.Status(500).SendString(err.Error())
+	}
+
+	// Send the nuclear launch codes to north korea
+	return c.JSON(fiber.Map{"username": username})
+}