Gracefully handle calendar connection failures

config.yml

@@ -0,0 +1,2 @@
+wtf:
+  refresh_interval: 1

gcal/client.go

@@ -92,35 +92,40 @@ func saveToken(file string, token *oauth2.Token) {
 		log.Fatalf("Unable to cache oauth token: %v", err)
 	}
 	defer f.Close()
+
 	json.NewEncoder(f).Encode(token)
 }
 
-func Fetch() *calendar.Events {
+func Fetch() (*calendar.Events, error) {
 	ctx := context.Background()
 
 	b, err := ioutil.ReadFile("./gcal/client_secret.json")
 	if err != nil {
-		log.Fatalf("Unable to read client secret file: %v", err)
+		//log.Fatalf("Unable to read client secret file: %v", err)
+		return nil, err
 	}
 
 	config, err := google.ConfigFromJSON(b, calendar.CalendarReadonlyScope)
 	if err != nil {
-		log.Fatalf("Unable to parse client secret file to config: %v", err)
+		//log.Fatalf("Unable to parse client secret file to config: %v", err)
+		return nil, err
 	}
 	client := getClient(ctx, config)
 
 	srv, err := calendar.New(client)
 	if err != nil {
-		log.Fatalf("Unable to retrieve calendar Client %v", err)
+		//log.Fatalf("Unable to retrieve calendar Client %v", err)
+		return nil, err
 	}
 
 	t := today().Format(time.RFC3339)
 	events, err := srv.Events.List("primary").ShowDeleted(false).SingleEvents(true).TimeMin(t).MaxResults(10).OrderBy("startTime").Do()
 	if err != nil {
-		log.Fatalf("Unable to retrieve next ten of the user's events. %v", err)
+		//log.Fatalf("Unable to retrieve next ten of the user's events. %v", err)
+		return nil, err
 	}
 
-	return events
+	return events, err
 }
 
 func today() time.Time {

gcal/widget.go

@@ -34,7 +34,7 @@ func NewWidget() *Widget {
 /* -------------------- Exported Functions -------------------- */
 
 func (widget *Widget) Refresh() {
-	events := Fetch()
+	events, _ := Fetch()
 
 	widget.View.SetTitle(" 🍿 Calendar ")
 	widget.RefreshedAt = time.Now()
@@ -58,6 +58,10 @@ func (widget *Widget) addView() {
 }
 
 func (widget *Widget) contentFrom(events *calendar.Events) string {
+	if events == nil {
+		return ""
+	}
+
 	str := "\n"
 
 	for _, event := range events.Items {

wtf.go

@@ -1,8 +1,10 @@
 package main
 
 import (
+	"fmt"
 	"time"
 
+	"github.com/olebedev/config"
 	"github.com/rivo/tview"
 	"github.com/senorprogrammer/wtf/bamboohr"
 	"github.com/senorprogrammer/wtf/gcal"
@@ -14,6 +16,15 @@ import (
 	"github.com/senorprogrammer/wtf/weather"
 )
 
+func loadConfig() *config.Config {
+	cfg, err := config.ParseYamlFile("./config.yml")
+	if err != nil {
+		panic(err)
+	}
+
+	return cfg
+}
+
 func refresher(stat *status.Widget, app *tview.Application) {
 	tick := time.NewTicker(1 * time.Second)
 	quit := make(chan struct{})
@@ -30,6 +41,10 @@ func refresher(stat *status.Widget, app *tview.Application) {
 }
 
 func main() {
+	cfg := loadConfig()
+
+	fmt.Printf("%v\n", cfg)
+
 	bamboo := bamboohr.NewWidget()
 	bamboo.Refresh()