chore: refactor codebase and update linter configurations

- Simplify configuration by setting linters default to none
- Enable additional linters including `copyloopvar`
- Remove some linters such as `gofmt`, `goimports`, `gosimple`, `stylecheck`, and `typecheck`
- Add exclusions for generated files, common false positives, and legacy code
- Specify paths to exclude from linters and formatters, including `third_party`, `builtin`, and `examples`
- Enable `gofmt` and `goimports` in formatters
- Replace `if-else` priority check with a `switch` statement for better readability and extensibility in APNS notification handling

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Author: appleboy

.golangci.yml

@@ -1,9 +1,9 @@
+version: "2"
 linters:
-  enable-all: false
-  disable-all: true
-  fast: false
+  default: none
   enable:
     - bodyclose
+    - copyloopvar
     - dogsled
     - dupl
     - errcheck
@@ -12,11 +12,8 @@ linters:
     - goconst
     - gocritic
     - gocyclo
-    - gofmt
-    - goimports
     - goprintffuncname
     - gosec
-    - gosimple
     - govet
     - ineffassign
     - lll
@@ -25,14 +22,29 @@ linters:
     - noctx
     - nolintlint
     - staticcheck
-    - stylecheck
-    - typecheck
     - unconvert
     - unparam
     - unused
     - whitespace
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofmt
     - gofumpt
-    - copyloopvar
-
-run:
-  timeout: 3m
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

notify/notification_apns.go

@@ -333,9 +333,10 @@ func GetIOSNotification(req *PushNotification) *apns2.Notification {
 	}
 
 	if len(req.Priority) > 0 {
-		if req.Priority == "normal" {
+		switch req.Priority {
+		case "normal":
 			notification.Priority = apns2.PriorityLow
-		} else if req.Priority == HIGH {
+		case "high": // Assuming the original HIGH constant meant "high"
 			notification.Priority = apns2.PriorityHigh
 		}
 	}