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main.go
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main.go
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package main
import (
"bufio"
"encoding/binary"
"encoding/json"
"fmt"
"log"
"net"
"net/url"
"os"
"os/signal"
"os/user"
"path/filepath"
"syscall"
"time"
"github.com/mmcdole/gofeed"
"github.com/reujab/RSSd/commands"
)
var (
uris []*url.URL
feeds []*gofeed.Feed
read []string
unread []commands.ListItem
)
func main() {
usr, err := user.Current()
die(err)
file, err := os.Open(filepath.Join(usr.HomeDir, ".config/rssd/feeds"))
die(err, "no configuration found (~/.config/rssd/feeds)")
scanner := bufio.NewScanner(file)
for scanner.Scan() {
uri, err := url.Parse(scanner.Text())
die(err, "invalid url: %s", scanner.Text())
uris = append(uris, uri)
}
die(scanner.Err())
file, err = os.Open(filepath.Join(usr.HomeDir, ".config/rssd/read"))
if err == nil {
die(json.NewDecoder(file).Decode(&read))
}
go func() {
for {
update()
time.Sleep(time.Minute * 10)
}
}()
sock, err := net.Listen("unix", filepath.Join(usr.HomeDir, ".local/share/rssd.sock"))
die(err)
defer func() { die(sock.Close()) }()
go func() {
for {
conn, err := sock.Accept()
die(err)
reader := bufio.NewReader(conn)
command, err := reader.ReadByte()
die(err)
switch command {
case commands.List:
die(json.NewEncoder(conn).Encode(unread))
case commands.Read:
var index uint16
die(binary.Read(reader, binary.BigEndian, &index))
if int(index) < len(unread) {
item := unread[index]
die(json.NewEncoder(conn).Encode(item.URL))
unread = append(unread[:index], unread[index+1:]...)
read = append(read, item.GUID)
// save read GUIDs
file, err := os.OpenFile(filepath.Join(usr.HomeDir, ".config/rssd/read"), os.O_WRONLY|os.O_CREATE, 0644)
die(err)
die(json.NewEncoder(file).Encode(read))
}
default:
die("unknown command")
}
die(conn.Close())
}
}()
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, syscall.SIGINT, syscall.SIGTERM)
<-interrupt
}
func die(args ...interface{}) {
switch len(args) {
case 0:
os.Exit(1)
case 1:
if args[0] != nil {
panic(args[0])
}
case 2:
if args[0] != nil {
panic(args[1])
}
}
}
func update() {
// update feeds
var tmpFeeds []*gofeed.Feed
for _, uri := range uris {
for i := 0; i < 3; i++ {
log.Printf("Updating %s...\n", uri)
parser := gofeed.NewParser()
feed, err := parser.ParseURL(uri.String())
if err == nil {
tmpFeeds = append(tmpFeeds, feed)
break
}
}
}
fmt.Println()
feeds = tmpFeeds
// update unread articles
var tmpUnread []commands.ListItem
for _, feed := range feeds {
itemLoop:
for _, item := range feed.Items {
// check if item has already been read
for _, guid := range read {
if guid == item.GUID {
continue itemLoop
}
}
// item hasn't been read
tmpUnread = append(tmpUnread, commands.ListItem{
GUID: item.GUID,
Name: feed.Title,
Title: item.Title,
URL: item.Link,
})
}
}
unread = tmpUnread
}