func UpdateFeed(feed structure.Feed) {
update, err := feedparser.ParseURL(feed.URL)
utils.Checkerr(err)
var link string
for _, li := range update.Link {
if li.Rel == "alternate" {
link = li.Href
}
}
if len(link) == 0 {
link = update.Link[0].Href
}
meta, err := siteparser.GetMetaForSite(link)
utils.Checkerr(err)
err = db.UpdateFeedInformation(update.Title, update.Subtitle, meta.Icon, meta.TwitterSite, feed.URL, update.Updated)
utils.Checkerr(err)
var entries []structure.Entry
for _, entry := range update.Entries {
exists := false
for _, oldentry := range feed.Entries {
if strings.Compare(entry.ID, oldentry.ID) == 0 && entry.Updated.Equal(oldentry.Updated) {
exists = true
}
}
if !exists {
newentry := convertAtomEntryToDBEntry(entry)
entries = append(entries, newentry)
}
}
err = db.UpdateFeedEntryList(entries, feed.URL)
utils.Checkerr(err)
feed, err = db.GetFeedByURL(feed.URL)
utils.Checkerr(err)
sortedentries := structure.SortEntriesByDate(feed.Entries)
var occasions []time.Time
for _, entry := range sortedentries {
occasions = append(occasions, entry.Updated)
}
changefrequency := calculateChangeFrequency(occasions)
err = db.UpdateFeedChangeFrequency(feed.URL, changefrequency)
utils.Checkerr(err)
err = db.UpdateFeedLastUpdate(feed.URL, time.Now())
utils.Checkerr(err)
}
func sortEntriesInFeed(feed structure.Feed) structure.Feed {
feed.Entries = structure.SortEntriesByDate(feed.Entries)
return feed
}