/
main.go
93 lines (81 loc) · 2.03 KB
/
main.go
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package main
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/signal"
"github.com/svenschwermer/gcal-notify/auth"
"github.com/svenschwermer/gcal-notify/config"
"github.com/svenschwermer/gcal-notify/events"
"golang.org/x/oauth2"
"google.golang.org/api/calendar/v3"
"google.golang.org/api/option"
)
var cfgFilePath = flag.String("config", config.DefaultPath, "Configuration file path")
func main() {
log.SetFlags(0)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
sig := make(chan os.Signal, 1)
signal.Notify(sig, os.Interrupt)
go func() {
<-sig
cancel()
}()
flag.Parse()
config.Parse(*cfgFilePath)
switch flag.NArg() {
case 0:
doPoll(ctx)
case 1:
if flag.Arg(0) == "auth" {
doAuth(ctx)
} else {
log.Fatalf("Unrecognized command %q", flag.Arg(0))
}
default:
log.Fatalf("Expected up to 1 argument, %d provided", flag.NArg())
}
}
func doAuth(ctx context.Context) {
ts, err := auth.GetTokenSourceFromWeb(ctx)
if err != nil {
log.Fatalf("Failed to get authentication token from web: %v", err)
}
if err := writeTokenToDisk(ts); err != nil {
log.Fatal(err)
}
}
func doPoll(ctx context.Context) {
ts, err := auth.GetTokenSourceFromDisk(ctx)
if err != nil {
log.Fatalf("Failed to read auth token from disk: %v\nConsider running\n %s auth",
err, os.Args[0])
}
client := oauth2.NewClient(ctx, ts)
defer func() {
if err := writeTokenToDisk(ts); err != nil {
log.Print(err)
}
}()
svc, err := calendar.NewService(ctx, option.WithHTTPClient(client))
if err != nil {
log.Fatalf("Unable to retrieve Calendar client: %v", err)
}
n, err := events.NewNotifier(svc, config.Cfg.CalendarID)
if err != nil {
log.Fatalf("Unable to initialize notifier: %v", err)
}
n.Poll(ctx)
}
func writeTokenToDisk(ts oauth2.TokenSource) error {
tok, err := ts.Token()
if err != nil {
return fmt.Errorf("failed to get token for serialization to disk: %w", err)
} else if err := auth.WriteTokenToDisk(tok); err != nil {
return fmt.Errorf("failed to write token to disk: %w", err)
}
return nil
}