wip: output, pipe

internal/controller/output/xfile/local.go

@@ -0,0 +1,45 @@
+package xfile
+
+import (
+	"context"
+	"fmt"
+	"github.com/loveuer/nfflow/internal/model"
+	"io"
+	"os"
+)
+
+type LocalFile struct {
+	writer io.Writer
+	cfg    struct {
+		MaxSize int
+		Path    string
+	}
+}
+
+func (lf *LocalFile) init() error {
+	var (
+		err error
+	)
+
+	if _, err = os.Stat(lf.cfg.Path); !os.IsNotExist(err) {
+		return fmt.Errorf("file=%s already exist", lf.cfg.Path)
+	}
+
+	if lf.writer, err = os.OpenFile(lf.cfg.Path, os.O_CREATE|os.O_RDWR, 0644); err != nil {
+		return fmt.Errorf("openfile=%s err=%v", lf.cfg.Path, err)
+	}
+
+	return nil
+}
+
+func (lf *LocalFile) Start(ctx context.Context, rowCh <-chan *model.TaskRow, errCh chan<- error) error {
+	var (
+		err error
+	)
+
+	if err = lf.init(); err != nil {
+		return err
+	}
+
+	return nil
+}