kurz/cmd/kurzd/export_content.go

package main

import (
	"database/sql"
	"fmt"

	"github.com/spf13/cobra"
	"gopkg.in/yaml.v2"
)

var cmdExportContent = &cobra.Command{
	Use:   "content",
	Short: "Export the database contents",
	Long:  "Export the whole list of Kurz URLs in the database",
	Run:   exportContentHandler,
}

func init() {
	cmdExport.AddCommand(cmdExportContent)
}

func exportContentLoader(db *sql.DB) ([]MapEntry, error) {
	stmt, err := db.Prepare(`
SELECT Hash, url, Date1, Date2, Date3, RefCount
FROM map
ORDER BY url`)
	if err != nil {
		panic(err.Error())
	}
	defer stmt.Close()

	rows, err := stmt.Query()
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	entry := MapEntry{}
	var entries []MapEntry
	for rows.Next() {
		err = rows.Scan(&entry.Hash, &entry.Url, &entry.Date1, &entry.Date2, &entry.Date3, &entry.RefCount)
		if err != nil {
			return nil, err
		}
		entries = append(entries, entry)
	}

	return entries, nil
}

func exportContentHandler(cmd *cobra.Command, args []string) {
	dbDriver, dbDsn := parseDbCred()
	db, err := dbDial(dbDriver, dbDsn)
	if err != nil {
		panic(err)
	}
	defer db.Close()
	entries, err := exportContentLoader(db)
	if err != nil {
		panic(err.Error())
	}
	y, err := yaml.Marshal(&entries)
	if err != nil {
		panic(err.Error())
	}
	fmt.Println(string(y))
}