hymkor · March 25, 2020 05:35 · Mar 25, 2020
diff --git a/scrapbox.go b/scrapbox.go
@@ -0,0 +1,135 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+var optionOutputDir = flag.String("d", "", "directory where files output")
+
+type ScrapboxPage struct {
+	Title   string   `json:"title"`
+	Created int64    `json:"created"`
+	Updated int64    `json:"updated"`
+	Lines   []string `json:"lines"`
+}
+
+type ScrapboxJson struct {
+	Name        string          `json:"name"`
+	DisplayName string          `json:"displayName"`
+	Exported    int64           `json:"exported"`
+	Pages       []*ScrapboxPage `json:"pages"`
+}
+
+func (this *ScrapboxJson) Read(r io.Reader) error {
+	bin, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+	err = json.Unmarshal(bin, this)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (this *ScrapboxJson) Load(fname string) error {
+	fd, err := os.Open(fname)
+	if err != nil {
+		return err
+	}
+	defer fd.Close()
+
+	err = this.Read(fd)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (page *ScrapboxPage) WriteTo(w io.Writer) (int64, error) {
+	n, _ := fmt.Fprintf(w, "Subject: %s\n", page.Title)
+	n1, _ := fmt.Fprintf(w, "Created: %s\n", time.Unix(page.Created, 0).Format(time.ANSIC))
+	n += n1
+	n1, _ = fmt.Fprintf(w, "Updated: %s\n", time.Unix(page.Updated, 0).Format(time.ANSIC))
+	n += n1
+	n1, _ = fmt.Fprintln(w)
+	n += n1
+	for _, line := range page.Lines {
+		n1, _ = fmt.Fprintln(w, line)
+		n += n1
+	}
+	return int64(n), nil
+}
+
+var forbiddens = strings.NewReplacer(
+	`\`, `￥`,
+	`/`, `／`,
+	`:`, `：`,
+	`*`, `＊`,
+	`?`, `？`,
+	`"`, `”`,
+	`<`, `＜`,
+	`>`, `＞`,
+	`|`, `｜`)
+
+func safeFileName(name string) string {
+	return forbiddens.Replace(name)
+}
+
+func main1(fname string) error {
+	var sbox ScrapboxJson
+	if err := sbox.Load(fname); err != nil {
+		return fmt.Errorf("%s: %w", fname, err)
+	}
+
+	if *optionOutputDir != "" {
+		for _, page := range sbox.Pages {
+			ofname := filepath.Join(
+				*optionOutputDir, safeFileName(page.Title)+".txt")
+			fd, err := os.Create(ofname)
+			if err != nil {
+				return fmt.Errorf("%s: Create: %w", ofname, err)
+			}
+			if _, err := page.WriteTo(fd); err != nil {
+				fd.Close()
+				return fmt.Errorf("%s: %w", ofname, err)
+			}
+			if err := fd.Close(); err != nil {
+				return fmt.Errorf("%s: Close: %w", ofname, err)
+			}
+		}
+		return nil
+	}
+	for i, page := range sbox.Pages {
+		if i > 0 {
+			fmt.Println("\f")
+		}
+		page.WriteTo(os.Stdout)
+	}
+	return nil
+}
+
+func mains(args []string) error {
+	for _, fname := range args {
+		if err := main1(fname); err != nil {
+			return fmt.Errorf("%s: %w", fname, err)
+		}
+	}
+	return nil
+}
+
+func main() {
+	flag.Parse()
+	if err := mains(flag.Args()); err != nil {
+		fmt.Fprintln(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+}