1 files changed, 76 insertions, 0 deletions
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..316485b
--- /dev/null
+++ b/main.go
@@ -0,0 +1,76 @@
+/*
+ * 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\r\nFrom: %s\r\n\r\nLink: %s\nTime: %s\n\n%s", to_address, title, from_address, link, t, text)
+			fmt.Printf("sending %s\n", t)
+			// cmd := exec.Command("/sbin/sendmail", "-i", "--", to_address)
+			cmd := exec.Command("msmtp", "-v", "-a", "runxiyu", "-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)
+		}
+	}
+	os.WriteFile(last_file, []byte(strconv.FormatInt(time.Now().Unix(), 10)), 0600)
+}