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/*
* SPDX-License-Identifier: CC0-1.0
*/
package main
import (
"fmt"
"io"
"os"
"os/exec"
"strconv"
"time"
"github.com/k3a/html2text"
"github.com/mmcdole/gofeed"
)
func p(e error) {
if e != nil {
panic(e)
}
}
func main() {
if len(os.Args) != 6 {
fmt.Fprintf(os.Stderr, "usage: %s rss_url to_address ts_file from_address default_title\n", os.Args[0])
return
}
rss_url := os.Args[1]
to_address := os.Args[2]
last_file := os.Args[3]
from_address := os.Args[4]
var default_title string
default_title = os.Args[5]
last_bytes, err := os.ReadFile(last_file)
p(err)
last_int64, err := strconv.ParseInt(string(last_bytes), 10, 64)
p(err)
last_time := time.Unix(last_int64, 0)
fp := gofeed.NewParser()
feed, _ := fp.ParseURL(rss_url)
for i := len(feed.Items) - 1; i >= 0; i-- {
item := feed.Items[i]
title := html2text.HTML2Text(item.Title)
if title == "" {
title = default_title
}
text := html2text.HTML2Text(item.Description)
link := item.Link
time_pointer := item.UpdatedParsed
if time_pointer == nil {
time_pointer = item.PublishedParsed
}
t := *time_pointer
switch t.Compare(last_time) {
case -1:
case 0:
break
case 1:
msg := fmt.Sprintf("To: %s\r\nSubject: %s %s\r\nFrom: %s\r\n\r\nLink: %s\nTime: %s\n\n%s", to_address, t, title, from_address, link, t, text)
fmt.Printf("%s\n\n\n\n", msg)
cmd := exec.Command("/sbin/sendmail", "-i", "--", to_address)
stdin, err := cmd.StdinPipe()
p(err)
io.WriteString(stdin, msg)
stdin.Close()
out, err := cmd.CombinedOutput()
p(err)
fmt.Printf("%s\n", out)
time.Sleep(5 * time.Second)
}
}
os.WriteFile(last_file, []byte(strconv.FormatInt(time.Now().Unix(), 10)), 0600)
}
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