refactor: implement measure

Signed-off-by: thxCode <[email protected]>

pkg/apis/measure/handler.go

@@ -13,7 +13,7 @@ import (
 
 func Readyz() runtime.Handle {
 	return func(c *gin.Context) {
-		d, ok := health.MustValidate(c, []string{"k8sctrl", "casdoor"})
+		d, ok := health.MustValidate(c, []string{"database"})
 		if !ok {
 			c.String(http.StatusServiceUnavailable, d)
 			return

pkg/database/driver.go

@@ -72,4 +72,7 @@ type BoltDriver interface {
 
 	// IsReadOnly returns whether the database is opened in read-only mode.
 	IsReadOnly() bool
+
+	// Path returns the path to the file backing the database.
+	Path() string
 }

pkg/database/health.go

@@ -0,0 +1,20 @@
+package database
+
+import (
+	"context"
+	"errors"
+	"os"
+)
+
+func IsConnected(ctx context.Context, db BoltDriver) error {
+	_, err := os.Stat(db.Path())
+	if err != nil {
+		return err
+	}
+
+	if db.IsReadOnly() {
+		return errors.New("invalid database storage file: read-only")
+	}
+
+	return nil
+}