add pttodo export file option

upload.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -8,10 +9,13 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"path"
 	"regexp"
 	"strconv"
 	"strings"
 	"time"
+
+	yaml "gopkg.in/yaml.v2"
 )
 
 func Upload(config Config, transaction *Transaction) error {
@@ -20,6 +24,8 @@ func Upload(config Config, transaction *Transaction) error {
 		return uploadTodo(config, transaction)
 	case UploaderLedger:
 		return uploadLedger(config, transaction)
+	case UploaderPTTodo:
+		return uploadPTTodo(config, transaction)
 	default:
 		return errors.New("not impl: uploader")
 	}
@@ -49,6 +55,43 @@ func uploadTodo(config Config, transaction *Transaction) error {
 	return nil
 }
 
+func uploadPTTodo(config Config, transaction *Transaction) error {
+	b, err := ioutil.ReadFile(config.TodoAddr)
+	if os.IsNotExist(err) {
+		b = []byte("todo:\n")
+	} else if err != nil {
+		return err
+	} else if len(b) == 0 {
+		b = []byte("todo:\n")
+	}
+	f, err := ioutil.TempFile(os.TempDir(), path.Base(config.TodoAddr))
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	sep := []byte{'\n'}
+	seek := []byte("todo:")
+	for len(b) > 0 {
+		idx := bytes.Index(b, sep)
+		if idx == -1 {
+			idx = len(b) - 1
+		}
+		fmt.Fprintf(f, "%s\n", b[:idx])
+		if bytes.Equal(bytes.TrimSpace(b[:idx]), seek) {
+			fmt.Fprintf(f, `- {"todo":%q, "tags":%q}%s`, transaction.Format(), config.TodoTag, "\n")
+		}
+		b = b[idx+1:]
+	}
+	f.Close()
+	var v interface{}
+	if b, err := ioutil.ReadFile(f.Name()); err != nil {
+		return err
+	} else if err := yaml.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	return os.Rename(f.Name(), config.TodoAddr)
+}
+
 func uploadLedger(config Config, transaction *Transaction) error {
 	f, err := os.OpenFile(config.TodoAddr, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {