/
main.go
235 lines (203 loc) · 5.14 KB
/
main.go
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package main
import (
"encoding/json"
"fmt"
"html/template"
"os"
"os/signal"
"time"
"github.com/dustin/go-nma"
"github.com/restanrm/twitter"
)
var nmaKey = ""
var templates *template.Template
type Followers struct {
Ids []int `json:"ids"`
Next_cursor int `json:"next_cursor"`
Next_cursor_str string `json:"next_cursor_str"`
Previous_cursor int `json:"previous_cursor"`
Previous_cursor_str string `json:"previous_cursor_str"`
}
func handleError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(-1)
}
}
func isFollowerInFollowerList(id int, liste []int) bool {
for i := 0; i < len(liste); i++ {
if liste[i] == id {
return true
}
}
return false
}
type User struct {
Name string `json:"screen_name"`
}
func (u User) String() string {
return fmt.Sprintf("[%s]: https://twitter.com/%s", u.Name, u.Name)
}
func diffFollowers(prev, cur []int) ([]int, []int) {
var followersLost []int
var followersWin []int
for _, elt := range prev {
if !isFollowerInFollowerList(elt, cur) {
followersLost = append(followersLost, elt)
}
}
for _, elt := range cur {
if !isFollowerInFollowerList(elt, prev) {
followersWin = append(followersWin, elt)
}
}
return followersLost, followersWin
}
func getFollowers(twitr twitter.Twitter, screen_name string) Followers {
bFollowers, err := twitr.FollowersIds(screen_name, -1)
handleError(err)
var curFollowers Followers
err = json.Unmarshal(bFollowers, &curFollowers)
handleError(err)
return curFollowers
}
func checkEnvVar(variable string) {
if variable == "" {
fmt.Println("Error of env variable, check that TWITTER_USERNAME, TWITTER_KEY, TWITTER_SECRET are defined")
fmt.Println("NOTIFY_MY_ANDROID_KEY is optional")
os.Exit(-1)
}
}
func main() {
var twitr twitter.Twitter
templates = template.Must(template.New("nma").Parse(templateNMA))
templates = template.Must(templates.New("console").Parse(templateNotifyConsole))
username := os.Getenv("TWITTER_USERNAME")
checkEnvVar(username)
key := os.Getenv("TWITTER_KEY")
checkEnvVar(key)
secret := os.Getenv("TWITTER_SECRET")
checkEnvVar(secret)
nmaKey = os.Getenv("NOTIFY_MY_ANDROID_KEY") // this parameter is optional, no need to check
if nmaKey != "" {
n := nma.New(nmaKey)
err := n.Verify(nmaKey)
handleError(err)
}
twitr = twitter.NewTwitter(key, secret)
defer twitr.Close()
done := make(chan bool)
c := make(chan os.Signal)
signal.Notify(c, os.Interrupt)
go func(twitr twitter.Twitter, done <-chan bool) {
var end bool
var prevFollowers, curFollowers Followers
prevFollowers = getFollowers(twitr, username)
fmt.Printf("Initialisation: %v followers for user %v\n", len(prevFollowers.Ids), username)
tick := time.Tick(1 * time.Minute)
for !end {
select {
case <-done:
end = true
case <-tick:
curFollowers = getFollowers(twitr, username)
if len(curFollowers.Ids) == 0 {
continue
}
lost, win := diffFollowers(prevFollowers.Ids, curFollowers.Ids)
res := parseResult(twitr, result{lose: lost, win: win, source: curFollowers})
notify(res)
prevFollowers = curFollowers
}
}
}(twitr, done)
select {
case <-c:
done <- true
}
}
type result struct {
source Followers
win []int
lose []int
}
type Result struct {
Source Followers
WinMessage, LoseMessage string
Win []User
Lose []User
}
func parseResult(twitr twitter.Twitter, tab result) Result {
var out Result
out.Source = tab.source
fn := func(dest *[]User, source []int) {
for _, id := range source {
var user User
bUser, err := twitr.ShowId(id)
handleError(err)
err = json.Unmarshal(bUser, &user)
handleError(err)
*dest = append(*dest, user)
}
}
if len(tab.lose) < 15 {
fn(&out.Lose, tab.lose)
} else {
out.LoseMessage += "Too many users lost."
}
if len(tab.win) < 15 {
fn(&out.Win, tab.win)
} else {
out.WinMessage += "Too many users won."
}
return out
}
type stringWriter struct {
s string
}
func (s *stringWriter) Write(p []byte) (n int, err error) {
for _, b := range p {
s.s += string(b)
n++
}
return
}
func (s stringWriter) String() string { return s.s }
func notify(result Result) {
if result.Source.Ids == nil {
return
}
err := templates.ExecuteTemplate(os.Stdout, "console", result)
handleError(err)
if nmaKey != "" {
var s stringWriter
err = templates.ExecuteTemplate(&s, "nma", result)
handleError(err)
if s.s == "" {
return
}
n := nma.New(nmaKey)
e := nma.Notification{
Application: "ListFollowers",
Event: "Liste of followers",
Description: s.s,
ContentType: "text/html",
}
err = n.Notify(&e)
handleError(err)
}
}
var templateNMA = `{{if .LoseMessage}}<p>{{.LoseMessage}}</p>
{{else if .Lose}}<h3>Lose Followers</h3>
{{range .Lose}}<p>{{.String}}</p>
{{end}}{{end}}{{if .WinMessage}}<p>{{.WinMessage}}</p>
{{else if .Win}}<h3>Win Followers:</h3>
{{range .Win}}<p>{{.String}}</p>
{{end}}{{end}}`
var templateNotifyConsole = `{{if .LoseMessage}}{{.LoseMessage}}
{{else if .Lose}}Lose Followers:
{{range .Lose}}{{.String}}
{{end}}{{end}}{{if .WinMessage}}{{.WinMessage}}
{{else if .Win}}Win Followers:
{{range .Win}}{{.String}}
{{end}}{{end}}`