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package feed
import (
ctxt "context"
"fmt"
"sync"
"time"
"github.com/mmcdole/gofeed"
"github.com/Necoro/feed2imap-go/internal/log"
)
func context() (ctxt.Context, ctxt.CancelFunc) {
return ctxt.WithTimeout(ctxt.Background(), 60*time.Second)
}
func parseFeed(feed *Feed) error {
ctx, cancel := context()
defer cancel()
fp := gofeed.NewParser()
parsedFeed, err := fp.ParseURLWithContext(feed.Url, ctx)
if err != nil {
return fmt.Errorf("while fetching %s from %s: %w", feed.Name, feed.Url, err)
}
feed.feed = parsedFeed
feed.items = make([]feeditem, len(parsedFeed.Items))
for idx, item := range parsedFeed.Items {
feed.items[idx] = feeditem{parsedFeed, item}
}
return nil
}
func handleFeed(feed *Feed, group *sync.WaitGroup, success chan<- bool) {
defer group.Done()
log.Printf("Fetching %s from %s", feed.Name, feed.Url)
err := parseFeed(feed)
if err != nil {
log.Error(err)
}
success <- err == nil
}
func Parse(feeds Feeds) int {
var wg sync.WaitGroup
wg.Add(len(feeds))
success := make(chan bool, len(feeds))
for _, feed := range feeds {
go handleFeed(feed, &wg, success)
}
wg.Wait()
close(success)
ctr := 0
for s := range success {
if s {
ctr++
}
}
return ctr
}
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