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package main
import (
"flag"
"fmt"
"os"
"github.com/Necoro/feed2imap-go/internal/feed/cache"
"github.com/Necoro/feed2imap-go/internal/feed/template"
"github.com/Necoro/feed2imap-go/internal/imap"
"github.com/Necoro/feed2imap-go/pkg/config"
"github.com/Necoro/feed2imap-go/pkg/log"
"github.com/Necoro/feed2imap-go/pkg/version"
)
// flags
var (
cfgFile string = "config.yml"
cacheFile string
printVersion bool = false
dryRun bool = false
buildCache bool = false
verbose bool = false
debug bool = false
)
func init() {
flag.StringVar(&cfgFile, "f", cfgFile, "configuration file")
flag.StringVar(&cacheFile, "c", "", "override cache file location")
flag.BoolVar(&printVersion, "version", printVersion, "print version and exit")
flag.BoolVar(&dryRun, "dry-run", dryRun, "do everything short of uploading and writing the cache")
flag.BoolVar(&buildCache, "build-cache", buildCache, "only (re)build the cache; useful after migration or when the cache is lost or corrupted")
flag.BoolVar(&verbose, "v", verbose, "enable verbose output")
flag.BoolVar(&debug, "d", debug, "enable debug output")
}
func processFeed(cf cache.CachedFeed, client *imap.Client, dryRun bool) {
feed := cf.Feed()
msgs, err := feed.Messages()
if err != nil {
log.Errorf("Processing items of feed %s: %s", feed.Name, err)
return
}
if dryRun || len(msgs) == 0 {
cf.Commit()
return
}
folder := client.NewFolder(feed.Target)
if err = client.EnsureFolder(folder); err != nil {
log.Errorf("Creating folder of feed %s: %s", feed.Name, err)
return
}
if err = msgs.Upload(client, folder, feed.Reupload); err != nil {
log.Errorf("Uploading messages of feed %s: %s", feed.Name, err)
return
}
log.Printf("Uploaded %d messages to '%s' @ %s", len(msgs), feed.Name, folder)
cf.Commit()
}
func loadTemplate(path string, tpl template.Template) error {
if path == "" {
return nil
}
log.Printf("Loading custom %s template from %s", tpl.Name(), path)
if err := tpl.LoadFile(path); err != nil {
return fmt.Errorf("loading %s template from %s: %w", tpl.Name(), path, err)
}
return nil
}
func run() error {
flag.Parse()
if printVersion {
println("Feed2Imap-Go, " + version.FullVersion())
return nil
}
if debug {
log.SetDebug()
} else if verbose {
log.SetVerbose()
}
log.Printf("Starting up (%s)...", version.FullVersion())
cfg, err := config.Load(cfgFile)
if err != nil {
return err
}
state, err := cache.NewState(cfg)
if err != nil {
return err
}
cacheLocation := cacheFile
if cacheLocation == "" {
cacheLocation = cfg.Cache
}
log.Debugf("Using '%s' as cache location", cacheLocation)
err = state.LoadCache(cacheLocation, buildCache)
if err != nil {
return err
}
defer state.UnlockCache()
state.RemoveUndue()
if state.NumFeeds() == 0 {
log.Print("Nothing to do, exiting.")
// nothing to do
return nil
}
if !buildCache {
if err = loadTemplate(cfg.HtmlTemplate, template.Html); err != nil {
return err
}
if err = loadTemplate(cfg.TextTemplate, template.Text); err != nil {
return err
}
}
imapErr := make(chan error, 1)
var c *imap.Client
if !dryRun && !buildCache {
go func() {
var err error
c, err = imap.Connect(cfg.Target, cfg.MaxConns)
imapErr <- err
}()
defer func() {
// capture c and not evaluate it, before connect has run
c.Disconnect()
}()
}
if success := state.Fetch(); success == 0 {
return fmt.Errorf("No successful feed fetch.")
}
state.Filter()
if buildCache {
state.Foreach(cache.CachedFeed.Commit)
} else {
if !dryRun {
if err = <-imapErr; err != nil {
return err
}
}
state.ForeachGo(func(f cache.CachedFeed) {
processFeed(f, c, dryRun)
})
}
if !dryRun {
if err = state.StoreCache(cacheLocation); err != nil {
return err
}
}
return nil
}
func main() {
if err := run(); err != nil {
log.Error(err)
os.Exit(1)
}
}
|
