feat: initial commit

internal/http/handler/webui/common/util.go

@@ -0,0 +1,36 @@
+package common
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net/http"
+
+	"github.com/gabriel-vasile/mimetype"
+	"github.com/pkg/errors"
+)
+
+type viewModelFillerFunc[T any] func(ctx context.Context, vmodel *T, r *http.Request) error
+
+func FillViewModel[T any](ctx context.Context, vmodel *T, r *http.Request, funcs ...viewModelFillerFunc[T]) error {
+	for _, fn := range funcs {
+		if err := fn(ctx, vmodel, r); err != nil {
+			return errors.WithStack(err)
+		}
+	}
+
+	return nil
+}
+
+func DetectMimeType(input io.Reader) (mimeType string, recycled io.Reader, err error) {
+	header := bytes.NewBuffer(nil)
+
+	mtype, err := mimetype.DetectReader(io.TeeReader(input, header))
+	if err != nil {
+		return
+	}
+
+	recycled = io.MultiReader(header, input)
+
+	return mtype.String(), recycled, err
+}