From 9016476f2a5051fd72dbe35d0c7bce13b4b6d55b Mon Sep 17 00:00:00 2001
From: Vidhu Kant Sharma <vidhukant@vidhukant.com>
Date: Fri, 24 Nov 2023 20:10:31 +0530
Subject: not prematurely killing the server before showing message in browser
 upon login

---
 auth/server.go | 60 +++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 41 insertions(+), 19 deletions(-)

(limited to 'auth/server.go')

diff --git a/auth/server.go b/auth/server.go
index 0f2496e..5bce2aa 100644
--- a/auth/server.go
+++ b/auth/server.go
@@ -19,51 +19,73 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package auth
 
 import (
+	"context"
   "net/http"
   "net/url"
+	"html"
   "encoding/json"
   "os"
   "fmt"
+	"errors"
 )
 
 func listen(clientId, verifier string) {
-  http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-	  code, codeExists := r.URL.Query()["code"]
+	mux := http.NewServeMux()
+	server := &http.Server{Addr: ":8000", Handler: mux}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		code, codeExists := r.URL.Query()["code"]
 
 		if codeExists {
-	    accessToken, refreshToken, expiresIn := requestToken(clientId, verifier, code[0])
-		  setToken(accessToken)
-		  setRefreshToken(refreshToken)
-      setExpiresIn(expiresIn)
-			fmt.Println("\x1b[32mYou have successfully logged into macli.\x1b[0m")
-			fmt.Println("\x1b[32mYou can close the web browser tab now.\x1b[0m")
-			os.Exit(0)
+			err := getToken(clientId, verifier, code[0])
+			if err != nil {
+			  fmt.Fprintf(w, "<p>An error occoured while logging in: %s</p>", html.EscapeString(err.Error()))
+
+				fmt.Println("Error while requesting an access token from MyAnimeList:", err)
+			} else {
+				fmt.Fprintf(w, "<p>Login successful! You may close this tab now.</p>")
+
+				fmt.Println("\x1b[32mYou have successfully logged into macli.\x1b[0m")
+				fmt.Println("\x1b[32mYou can close the web browser tab now.\x1b[0m")
+			}
+		} else {
+			fmt.Fprintf(w, "<p>An error occoured while logging in (invalid request)</p>")
+
+			fmt.Println("An error occoured while logging in (invalid request)")
 		}
+
+		go server.Shutdown(context.Background())
   })
 
-  err := http.ListenAndServe(":8000", nil)
-  if err != nil {
+  err := server.ListenAndServe()
+  if err != nil && err != http.ErrServerClosed {
     fmt.Println("There was an error initialising the server", err.Error())
     os.Exit(1)
   }
 }
 
-func requestToken(clientId, verifier, code string) (string, string, string) {
+func getToken(clientId, verifier, code string) error {
   data := url.Values{
-	"client_id": {clientId},
-	"code_verifier": {verifier},
-	"grant_type": {"authorization_code"},
-	"code": {code},
+		"client_id": {clientId},
+		"code_verifier": {verifier},
+		"grant_type": {"authorization_code"},
+		"code": {code},
   }
 
   resp, err := http.PostForm("https://myanimelist.net/v1/oauth2/token", data)
   if err != nil {
-    fmt.Println("Error while requesting an access token:", err)
-	os.Exit(1)
+		return err
   }
 
   var res map[string]interface{}
   json.NewDecoder(resp.Body).Decode(&res)
 
-  return fmt.Sprintf("%v", res["access_token"]), fmt.Sprintf("%v", res["refresh_token"]), fmt.Sprintf("%v", res["expires_in"])
+	if res["error"] != nil {
+		return errors.New(fmt.Sprintf("%v (%v)", res["message"], res["error"]))
+	}
+
+	setToken(fmt.Sprintf("%v", res["access_token"]))
+	//setRefreshToken(refreshToken)
+	//setExpiresIn(expiresIn)
+  return nil
 }
-- 
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