esgo2dump/internal/cmd/run.go

package cmd

import (
	"encoding/json"
	"errors"
	"esgo2dump/internal/interfaces"
	"esgo2dump/internal/opt"
	"esgo2dump/internal/xes"
	"esgo2dump/internal/xfile"
	"fmt"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
	"io"
	"net/url"
	"os"
)

func run(cmd *cobra.Command, args []string) error {
	var (
		err     error
		ioi     interfaces.DumpIO
		ioo     interfaces.DumpIO
		lines   []*interfaces.ESSource
		succeed int
	)

	if opt.Debug {
		logrus.SetLevel(logrus.DebugLevel)
	}

	if ioi, err = newIO(f_input, interfaces.IOInput); err != nil {
		return err
	}

	if ioo, err = newIO(f_output, interfaces.IOOutput); err != nil {
		return err
	}

	for {
		select {
		case <-cmd.Context().Done():
		default:
			succeed = 0

			if lines, err = ioi.Read(f_limit); err != nil {
				if errors.Is(err, io.EOF) {
					return nil
				}

				return err
			}

			if len(lines) == 0 {
				return nil
			}

			if succeed, err = ioo.Write(lines); err != nil {
				return err
			}

			if succeed != len(lines) {
				return fmt.Errorf("cmd.run: got lines=%d, only succeed=%d", len(lines), succeed)
			}

			logrus.Infof("Dump: %d docs succeed!!!", succeed)
		}

	}
}

func newIO(source string, ioType interfaces.IO) (interfaces.DumpIO, error) {
	var (
		err  error
		iurl *url.URL
		file *os.File
		qm   = make(map[string]any)
	)

	logrus.Debugf("newIO.%s: source string=%s", ioType.Code(), source)

	if iurl, err = url.Parse(source); err != nil {
		logrus.Debugf("newIO.%s: url parse source err=%v", ioType.Code(), err)
		goto ClientByFile
	}

	if !(iurl.Scheme == "http" || iurl.Scheme == "https") {
		logrus.Debugf("newIO.%s: url scheme=%s invalid", ioType.Code(), iurl.Scheme)
		goto ClientByFile
	}

	if iurl.Host == "" {
		logrus.Debugf("newIO.%s: url host empty", ioType.Code())
		goto ClientByFile
	}

	if ioType == interfaces.IOInput && f_query != "" {
		if err = json.Unmarshal([]byte(f_query), &qm); err != nil {
			logrus.Debugf("newIO.%s: query=%s invalid to map[string]any", ioType.Code(), f_query)
			return nil, fmt.Errorf("invalid query err=%v", err)
		}
	}

	logrus.Debugf("newIO.%s: source as url=%+v", ioType.Code(), *iurl)

	return xes.NewClient(iurl, qm)

ClientByFile:
	if ioType == interfaces.IOOutput {
		if _, err = os.Stat(source); !os.IsNotExist(err) {
			return nil, fmt.Errorf("output_file=%s already exist", source)
		}
	}

	if file, err = os.OpenFile(source, os.O_CREATE|os.O_RDWR, 0644); err != nil {
		return nil, err
	}

	return xfile.NewClient(file, ioType)
}