feat: some generall imporvemnts especially pre-commit and linting

.github/dependabot.yml

@@ -0,0 +1,13 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "gomod" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+    reviewers:
+    - "OnlyNico43"

.github/workflows/tests.yml

@@ -1,31 +1,29 @@
 name: Run Tests
 
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    branches:
-      - main
+on: ["push", "pull_request"]
 
 jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Set up Go
-        uses: actions/setup-go@v5
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
       - name: format
         run: go fmt
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Set up Go
-        uses: actions/setup-go@v5
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
       - name: test
         env:
           GIN_MODE: release
         run: go test
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+

.gitignore

@@ -0,0 +1,3 @@
+.vscode
+.idea
+out

.pre-commit-config.yaml

@@ -0,0 +1,23 @@
+repos:
+  - repo: local
+    hooks:
+    - id: gofmt
+      name: gofmt
+      entry: gofmt -w .
+      language: system
+      pass_filenames: false
+
+    - id: go-mod-tidy
+      name: go-mod-tidy
+      entry: go mod tidy
+      language: system
+      pass_filenames: false
+      require_serial: true
+
+    - id: golangci-lint
+      name: golangci-lint
+      entry: golangci-lint run
+      language: system
+      pass_filenames: false
+      require_serial: true
+

README.md

@@ -29,7 +29,7 @@ func main() {
 }
 ```
 
-Done now your application is equipped with a basic cors configuration
+Done, now your application is equipped with a basic cors configuration
 
 
 ## How to configure

cors.go

@@ -4,6 +4,7 @@ This is a cors middleware for the gin http framwork and can be used to configure
 package cors
 
 import (
+	"fmt"
 	"net/http"
 	"slices"
 	"strconv"
@@ -57,28 +58,32 @@ type Config struct {
 Adds wildcard to the array if no value was set.
 Panics if the allowCredentials is true and the header is a wildcard
 */
-func checkCredentials(header []string, allowCredentials bool) []string {
-	if header == nil && !allowCredentials {
-		header = []string{"*"}
-		return header
-	} else if (header == nil || slices.Contains(header, "*")) && allowCredentials {
-		panic("The allowed origins must be set and cannot contain the \"*\" wildcard when AllowCredentials is true")
-	} else {
-		return header
+func checkCredentials(header []string, allowCredentials bool, headerName string) []string {
+	if header == nil || len(header) <= 0 {
+		if allowCredentials {
+			panic(fmt.Sprintf("The %s must be set when AllowCredentials is true", headerName))
+		}
+		return []string{"*"}
+	}
+
+	if slices.Contains(header, "*") && allowCredentials {
+		panic(fmt.Sprintf("The %s cannot contain the \"*\" wildcard when AllowCredentials is true", headerName))
 	}
+
+	return header
 }
 
 /*
 Validates the config and sets empty values to their defaults if necessary
 */
 func (c Config) validate() Config {
-	c.AllowedOrigins = checkCredentials(c.AllowedOrigins, c.AllowCredentials)
+	c.AllowedOrigins = checkCredentials(c.AllowedOrigins, c.AllowCredentials, "allowed origins")
 
-	c.AllowedMethods = checkCredentials(c.AllowedMethods, c.AllowCredentials)
+	c.AllowedMethods = checkCredentials(c.AllowedMethods, c.AllowCredentials, "allowed methods")
 
-	c.AllowedHeaders = checkCredentials(c.AllowedHeaders, c.AllowCredentials)
+	c.AllowedHeaders = checkCredentials(c.AllowedHeaders, c.AllowCredentials, "allowed headers")
 
-	c.ExposeHeaders = checkCredentials(c.ExposeHeaders, c.AllowCredentials)
+	c.ExposeHeaders = checkCredentials(c.ExposeHeaders, c.AllowCredentials, "expose headers")
 
 	if c.MaxAge == 0 {
 		c.MaxAge = 24 * time.Hour