nitterbot/main.go

167 lines
4.4 KiB
Go

package main
import (
"bufio"
"fmt"
"log"
"os"
"regexp"
"strings"
"time"
sn "github.com/ekzyis/snappy"
)
type NostrClient struct {
Url string
Name string
}
var (
TwitterUrlRegexp = regexp.MustCompile(`^(?:https?:\/\/)?((www\.)?(twitter|x)\.com)\/`)
// references:
// - https://github.com/zedeus/nitter/wiki/Instances
// - https://status.d420.de/
NitterClearnetUrls = []string{
"xcancel.com",
}
// since v0.4.0, bot also replaces nostr links with nostr.com so users can pick their client
NostrUrlRegexp = regexp.MustCompile(
`^(?:https?:\/\/)?(?:www\.)?` +
`(?:` +
`primal\.net\/(?:e\/)?` +
`|snort\.social\/(?:e\/)?` +
`|iris\.to\/` +
`|highlighter\.com\/(?:a\/)?` +
`|nostter\.app\/` +
`|coracle\.social\/(?:notes\/)?` +
`|satellite\.earth\/` +
`|nostrudel\.ninja\/(?:#\/n\/)?` +
`)((note|nevent)[a-zA-Z0-9]+)$`)
NostrClients = []NostrClient{
// list from nostr.com
NostrClient{"https://primal.net/e/", "primal.net"},
NostrClient{"https://snort.social/e/", "snort.social"},
NostrClient{"https://nostrudel.ninja/#/n/", "nostrudel.ninja"},
NostrClient{"https://satellite.earth/thread/", "satellite.earth"},
NostrClient{"https://coracle.social/", "coracle.social"},
NostrClient{"https://nostter.app/", "nostter.app"},
NostrClient{"https://highlighter.com/a/", "highlighter.com"},
NostrClient{"https://iris.to/", "iris.to"},
}
)
func WaitUntilNext(d time.Duration) {
now := time.Now()
dur := now.Truncate(d).Add(d).Sub(now)
log.Println("sleeping for", dur.Round(time.Second))
time.Sleep(dur)
}
func main() {
loadEnv()
c := sn.NewClient(
sn.WithBaseUrl(os.Getenv("SN_BASE_URL")),
sn.WithApiKey(os.Getenv("SN_API_KEY")),
)
for {
log.Println("fetching items ...")
r, err := c.Items(&sn.ItemsQuery{Sort: "recent", Limit: 21})
if err != nil {
log.Println(err)
SendToNostr(fmt.Sprint(err))
WaitUntilNext(time.Minute)
continue
}
for _, item := range r.Items {
if m := TwitterUrlRegexp.FindStringSubmatch(item.Url); m != nil {
log.Printf("item %d is twitter link\n", item.Id)
if ItemHasComment(item.Id) {
log.Printf("item %d already has nitter links comment\n", item.Id)
continue
}
comment := "**Twitter2Nitter**\n\nClearnet: "
for _, nUrl := range NitterClearnetUrls {
nitterLink := strings.Replace(item.Url, m[1], nUrl, 1)
comment += fmt.Sprintf("[%s](%s) | ", nUrl, nitterLink)
}
comment = strings.TrimRight(comment, "| ")
comment += "\n\n_Nitter is a free and open source alternative Twitter front-end focused on privacy and performance. "
comment += "Click [here](https://github.com/zedeus/nitter) for more information._"
cId, err := c.CreateComment(item.Id, comment)
if err != nil {
log.Println(err)
SendToNostr(fmt.Sprint(err))
continue
}
log.Printf("created comment %d\n", cId)
SaveComment(&sn.Comment{Id: cId, Text: comment, ParentId: item.Id})
} else {
log.Printf("item %d is not twitter link\n", item.Id)
}
if m := NostrUrlRegexp.FindStringSubmatch(item.Url); m != nil {
log.Printf("item %d is nostr link\n", item.Id)
if ItemHasComment(item.Id) {
log.Printf("item %d already has nostr links comment\n", item.Id)
continue
}
noteId := m[1]
comment := "**Nostr Client Picker**\n\n"
for _, client := range NostrClients {
comment += fmt.Sprintf("[%s](%s) | ", client.Name, client.Url+noteId)
}
comment = strings.TrimRight(comment, "| ")
cId, err := c.CreateComment(item.Id, comment)
if err != nil {
log.Println(err)
SendToNostr(fmt.Sprint(err))
continue
}
log.Printf("created comment %d\n", cId)
SaveComment(&sn.Comment{Id: cId, Text: comment, ParentId: item.Id})
} else {
log.Printf("item %d is not nostr link\n", item.Id)
}
}
WaitUntilNext(time.Minute)
}
}
func loadEnv() {
var (
f *os.File
s *bufio.Scanner
err error
)
if f, err = os.Open(".env"); err != nil {
log.Fatalf("error opening .env: %v", err)
}
defer f.Close()
s = bufio.NewScanner(f)
s.Split(bufio.ScanLines)
for s.Scan() {
line := s.Text()
parts := strings.SplitN(line, "=", 2)
// Check if we have exactly 2 parts (key and value)
if len(parts) == 2 {
os.Setenv(parts[0], parts[1])
} else {
log.Fatalf(".env: invalid line: %s\n", line)
}
}
// Check for errors during scanning
if err = s.Err(); err != nil {
fmt.Println("error scanning .env:", err)
}
}