From 955b0406997a7c62bea47a520f484f6137164b3f Mon Sep 17 00:00:00 2001
From: Laurent Le Houerou <laurent@lehouerou.net>
Date: Fri, 5 Apr 2019 15:39:35 +0400
Subject: [PATCH] Initial commit

---
 .gitignore |  14 +++++
 main.go    | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 160 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f2cc188
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,14 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+.idea/
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..59fe270
--- /dev/null
+++ b/main.go
@@ -0,0 +1,146 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"gopkg.in/src-d/go-git.v4"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
+	githttp "gopkg.in/src-d/go-git.v4/plumbing/transport/http"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+	"regexp"
+	"strings"
+	"time"
+)
+
+type Configuration struct {
+	RepositoryUrl string `json:"url"`
+	Username string `json:"name"`
+	Email string `json:"email"`
+	GitLogin string `json:"login"`
+	GitPassword string `json:"password"`
+}
+
+var configPath string
+
+func main() {
+
+	Info("Running dnsupdater...")
+
+	configPath = os.Args[1]
+
+	if confPathExists, _ := exists(configPath); !confPathExists{
+		configPath = "./data";
+	}
+
+	file, _ := os.Open(path.Join(configPath,"conf.json"))
+	defer file.Close()
+	decoder := json.NewDecoder(file)
+	configuration := Configuration{}
+	err := decoder.Decode(&configuration)
+
+	err = os.RemoveAll(path.Join(configPath,"data"))
+	CheckIfError(err)
+
+	_, err = git.PlainClone(path.Join(configPath,"data"), false, &git.CloneOptions{
+		URL:      configuration.RepositoryUrl,
+		Progress: os.Stdout,
+	})
+	CheckIfError(err)
+
+	currentIp := GetCurrentIp()
+	newIp := GetOutboundIP()
+
+	if currentIp == newIp {
+		Info("Ip has not changed %s", currentIp)
+		os.Exit(0)
+	}
+
+	Info("Ip has changed %s -> %s", currentIp, newIp)
+	SetCurrentIp(currentIp, newIp)
+
+	repo, err := git.PlainOpen(path.Join(configPath,"data"))
+	CheckIfError(err)
+	w, err := repo.Worktree()
+	CheckIfError(err)
+	_, err = w.Add("templates/home_a.lua")
+	CheckIfError(err)
+
+	status, err := w.Status()
+	CheckIfError(err)
+
+	fmt.Println(status)
+	_, err = w.Commit(fmt.Sprintf("Changement d'IP maison : %s -> %s", currentIp, newIp), &git.CommitOptions{
+		Author: &object.Signature{
+			Name:  configuration.Username,
+			Email: configuration.Email,
+			When:  time.Now().Local(),
+		},
+	})
+	CheckIfError(err)
+
+	err = repo.Push(&git.PushOptions{
+		Auth: &githttp.BasicAuth{
+			Username: configuration.GitLogin,
+			Password: configuration.GitPassword,
+		},
+	})
+	CheckIfError(err)
+
+}
+
+func GetCurrentIp() string {
+	b, err := ioutil.ReadFile(path.Join(configPath,"data/templates/home_a.lua"))
+	CheckIfError(err)
+
+	re := regexp.MustCompile("\"(.*?)\"")
+	match := re.FindStringSubmatch(string(b))
+	return match[1]
+}
+
+func SetCurrentIp(oldip string, newip string) {
+	b, err := ioutil.ReadFile(path.Join(configPath,"data/templates/home_a.lua"))
+	CheckIfError(err)
+
+	s := string(b)
+	s = strings.Replace(s, oldip, newip, 1)
+	ioutil.WriteFile(path.Join(configPath,"data/templates/home_a.lua"), []byte(s), 0644)
+}
+
+func CheckIfError(err error) {
+	if err == nil {
+		return
+	}
+
+	fmt.Printf("\x1b[31;1m%s\x1b[0m\n", fmt.Sprintf("error: %s", err))
+	os.Exit(1)
+}
+
+func GetOutboundIP() string {
+	url := "https://diagnostic.opendns.com/myip"
+	req, err := http.NewRequest("GET", url, nil)
+	CheckIfError(err)
+	res, err := http.DefaultClient.Do(req)
+	CheckIfError(err)
+	defer res.Body.Close()
+	body, err := ioutil.ReadAll(res.Body)
+	CheckIfError(err)
+	return string(body)
+}
+
+func exists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return true, err
+}
+
+func Info(format string, args ...interface{}) {
+	fmt.Printf("\x1b[34;1m%s\x1b[0m\n", fmt.Sprintf(format, args...))
+}