Import existing project

checkpoint_service/middleware/plugin.go

@@ -0,0 +1,47 @@
+// Package middleware contains a simple plugin system for Fiber middleware.
+// Register plugins by name and factory, then main.go will load them automatically.
+package middleware
+
+import (
+	"path/filepath"
+
+	"github.com/BurntSushi/toml"
+	"github.com/gofiber/fiber/v2"
+)
+
+// Plugin holds a plugin's name and a function that makes its handler.
+type Plugin struct {
+	Name    string
+	Factory func() fiber.Handler
+}
+
+// registry stores every plugin we've registered.
+var registry []Plugin
+
+// RegisterPlugin tags a plugin with a name and a factory so we can use it in the app.
+func RegisterPlugin(name string, factory func() fiber.Handler) {
+	registry = append(registry, Plugin{Name: name, Factory: factory})
+}
+
+// LoadPlugins returns the handler functions for each plugin.
+// If skipCheckpoint is true, it skips the plugin named "checkpoint".
+func LoadPlugins(skipCheckpoint bool) []fiber.Handler {
+	var handlers []fiber.Handler
+	for _, p := range registry {
+		if skipCheckpoint && p.Name == "checkpoint" {
+			continue
+		}
+		handlers = append(handlers, p.Factory())
+	}
+	return handlers
+}
+
+// LoadConfig loads the TOML file at middleware/config/[name].toml
+// and decodes it into the struct you provide.
+func LoadConfig(name string, v interface{}) error {
+	path := filepath.Join("middleware", "config", name+".toml")
+	if _, err := toml.DecodeFile(path, v); err != nil {
+		return err
+	}
+	return nil
+}