From a3cc5fd9e6655b48a473b6df5e4720ca943de657 Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Fri, 14 Apr 2017 01:00:02 +0900
Subject: [PATCH] add cmd/mstdn

---
 cmd/mstdn/main.go | 143 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 cmd/mstdn/main.go

diff --git a/cmd/mstdn/main.go b/cmd/mstdn/main.go
new file mode 100644
index 0000000..de864a0
--- /dev/null
+++ b/cmd/mstdn/main.go
@@ -0,0 +1,143 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/mattn/go-mastodon"
+	"github.com/mattn/go-tty"
+	"golang.org/x/net/html"
+)
+
+var blockTags = []string{"div", "br", "p", "blockquote", "pre", "h1", "h2", "h3", "h4", "h5", "h6"}
+
+func extractText(node *html.Node, w *bytes.Buffer) {
+	if node.Type == html.TextNode {
+		data := strings.Trim(node.Data, "\r\n")
+		if data != "" {
+			w.WriteString(data)
+		}
+	} else if node.Type == html.ElementNode {
+		if node.Data == "li" {
+			w.WriteString("\n* ")
+		}
+	}
+	for c := node.FirstChild; c != nil; c = c.NextSibling {
+		extractText(c, w)
+	}
+	if node.Type == html.ElementNode {
+		for _, bt := range blockTags {
+			if strings.ToLower(node.Data) == bt {
+				w.WriteString("\n")
+				break
+			}
+		}
+	}
+}
+
+func prompt() (string, string, error) {
+	t, err := tty.Open()
+	if err != nil {
+		return "", "", err
+	}
+	defer t.Close()
+
+	fmt.Print("E-Mail: ")
+	b, _, err := bufio.NewReader(os.Stdin).ReadLine()
+	if err != nil {
+		return "", "", err
+	}
+	email := string(b)
+
+	fmt.Print("Password: ")
+	password, err := t.ReadPassword()
+	if err != nil {
+		return "", "", err
+	}
+	return email, password, nil
+}
+
+func getConfig() (string, *mastodon.Config, error) {
+	dir := os.Getenv("HOME")
+	if dir == "" && runtime.GOOS == "windows" {
+		dir = os.Getenv("APPDATA")
+		if dir == "" {
+			dir = filepath.Join(os.Getenv("USERPROFILE"), "Application Data", "mstdn")
+		}
+		dir = filepath.Join(dir, "mstdn")
+	} else {
+		dir = filepath.Join(dir, ".config", "mstdn")
+	}
+	if err := os.MkdirAll(dir, 0700); err != nil {
+		return "", nil, err
+	}
+	file := filepath.Join(dir, "settings.json")
+	b, err := ioutil.ReadFile(file)
+	if err != nil && !os.IsNotExist(err) {
+		return "", nil, err
+	}
+	config := &mastodon.Config{
+		Server:       "https://mstdn.jp",
+		ClientID:     "654a15390204e70d74f8d9264526e017e26d323e20e3f983409c157115009862",
+		ClientSecret: "17274242a0846ebadcdda77727666c9d475f1989b56ad9bd959021f62f92a84c",
+	}
+	if err == nil {
+		err = json.Unmarshal(b, &config)
+		if err != nil {
+			return "", nil, fmt.Errorf("could not unmarshal %v: %v", file, err)
+		}
+	}
+	return file, config, nil
+}
+
+func main() {
+	file, config, err := getConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	c := mastodon.NewClient(config)
+
+	if config.AccessToken == "" {
+		email, password, err := prompt()
+		if err != nil {
+			log.Fatal(err)
+		}
+		err = c.Authenticate(email, password)
+		if err != nil {
+			log.Fatal(err)
+		}
+		b, err := json.MarshalIndent(config, "", "  ")
+		if err != nil {
+			log.Fatal("failed to store file:", err)
+		}
+		err = ioutil.WriteFile(file, b, 0700)
+		if err != nil {
+			log.Fatal("failed to store file:", err)
+		}
+		return
+	}
+
+	timeline, err := c.GetTimeline("/api/v1/timelines/home")
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, t := range timeline {
+		doc, err := html.Parse(strings.NewReader(t.Content))
+		if err != nil {
+			log.Fatal(err)
+		}
+		var buf bytes.Buffer
+		extractText(doc, &buf)
+		fmt.Println(t.Account.Username)
+		fmt.Println(buf.String())
+	}
+}