🎨 Refactor basic server structure

These changes refactor the router handling into its own package to keep
main.go clean. Also API handlers are here refactored to their corresponding
files.

router/router.go

@@ -0,0 +1,73 @@
+// Copyright 2024 Florian Beisel
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package router
+
+import (
+	"git.beisel.it/florian/hostname-service/api"
+	"git.beisel.it/florian/hostname-service/auth"
+	"git.beisel.it/florian/hostname-service/docs"
+	"git.beisel.it/florian/hostname-service/middleware"
+	"github.com/gin-gonic/gin"
+	swaggerFiles "github.com/swaggo/files"
+	ginSwagger "github.com/swaggo/gin-swagger"
+	// ... other necessary imports ...
+)
+
+func New() *gin.Engine {
+	gin.SetMode(gin.DebugMode)
+	router := gin.Default()
+
+	docs.SwaggerInfo.Host = "localhost:8080"
+	docs.SwaggerInfo.BasePath = "/api/v1"
+
+	v1 := router.Group("/api/v1")
+	{
+		// public routes
+		v1.POST("/login", auth.LoginHandler)
+
+		// Protected Routes
+		authenticated := v1.Group("/").Use(middleware.Authenticate())
+		{
+			authenticated.GET("/hello", api.Helloworld)
+
+			// Create Host
+			authenticated.POST("/:category", func(c *gin.Context) {
+				api.CreateOrUpdateHostname(c, false)
+			})
+
+			// Get Host Details
+			authenticated.GET("/:category/:hostname", api.GetHostnameByCategoryAndName)
+
+			// Update Host
+			authenticated.PUT("/:category/:oldhostname", func(c *gin.Context) {
+				api.CreateOrUpdateHostname(c, true)
+			})
+
+			// Delete Host
+			authenticated.DELETE("/:category/:hostname", api.DeleteHostname)
+
+			// List Hostnames
+			authenticated.GET("/:category", api.ListHostnamesByCategory)
+
+			// List available Rules
+			authenticated.GET("/api/rules", api.ListAvailableRules)
+		}
+	}
+
+	// Swagger endpoint
+	router.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
+
+	return router
+}