From 1d74a82aefdbc9936ee662c57dcdd8fa8364918a Mon Sep 17 00:00:00 2001
From: Teddy Wing
Date: Sun, 23 May 2021 00:05:18 +0200
Subject: Request Event read-write authorisation scope

Previously there were two OAuth authorisation prompts, one for each API
call, because each call has different default scopes.

Since we always need Event read-write access, set this as our scope for
both API calls so that we request only what the application as a whole
needs, and so we don't ask for authorisation twice (which requires
visiting a URL with one's Google account).
---
 src/main.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index a8d3e73..5298c30 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use anyhow::{self, Context};
 use base64;
 use chrono::DateTime;
-use google_calendar3::api::{Event, EventAttendee};
+use google_calendar3::api::{Event, EventAttendee, Scope};
 use google_calendar3::CalendarHub;
 use hyper;
 use hyper_rustls;
@@ -171,6 +171,10 @@ async fn rsvp(event_id: &str, response: &EventResponseStatus) -> anyhow::Result<
 
     let get_response = hub.events()
         .get("primary", event_id)
+
+        // Request read-write access to events so that we don't ask for
+        // authorization a second time on the subsequent Event.patch call.
+        .add_scope(Scope::Event)
         .doit()
         .await
         .with_context(|| format!("unable to get event '{}'", event_id))?;
@@ -196,6 +200,9 @@ async fn rsvp(event_id: &str, response: &EventResponseStatus) -> anyhow::Result<
 
     let rsvp_response = hub.events()
         .patch(event, "primary", event_id)
+
+        // The default scope is Scope::Full.
+        .add_scope(Scope::Event)
         .doit()
         .await
         .with_context(|| format!("unable to update event '{}'", event_id))?;
-- 
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