Get a calendar event from Google Calendar

Try out the `calendar3` API to get a single event from Google Calendar.
Mostly copied the example code from the `google-calendar3`
documentation:

https://docs.rs/google-calendar3/2.0.4+20210327/google_calendar3/index.html#a-complete-example

Modified it to get a single event, and to use the OAuth2 secret from
`~/.google-service-cli/calendar3-secret.json`.

1 files changed, 63 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index e7a11a9..9bd94bb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,64 @@
-fn main() {
-    println!("Hello, world!");
+use google_calendar3::{CalendarHub, Result, Error};
+use home;
+use hyper;
+use hyper_rustls;
+use tokio;
+use yup_oauth2 as oauth2;
+
+use std::fs;
+
+
+#[tokio::main]
+async fn main() {
+    // let secret: oauth2::ApplicationSecret = Default::default();
+    let secret = secret_from_file();
+
+    let auth = oauth2::InstalledFlowAuthenticator::builder(
+        secret,
+        oauth2::InstalledFlowReturnMethod::HTTPRedirect,
+    ).build().await.unwrap();
+
+    let hub = CalendarHub::new(
+        hyper::Client::builder()
+            .build(hyper_rustls::HttpsConnector::with_native_roots()),
+        auth,
+    );
+
+    let result = hub.events()
+        .get("primary", "1uj192r9qtotb6se0rov83ahr6")
+        .doit()
+        .await;
+
+    match result {
+        Err(e) => match e {
+            // The Error enum provides details about what exactly happened.
+            // You can also just use its `Debug`, `Display` or `Error` traits
+             Error::HttpError(_)
+            |Error::Io(_)
+            |Error::MissingAPIKey
+            |Error::MissingToken(_)
+            |Error::Cancelled
+            |Error::UploadSizeLimitExceeded(_, _)
+            |Error::Failure(_)
+            |Error::BadRequest(_)
+            |Error::FieldClash(_)
+            |Error::JsonDecodeError(_, _) => println!("{}", e),
+        },
+        Ok(res) => println!("Success: {:?}", res),
+    }
+}
+
+fn secret_from_file() -> oauth2::ApplicationSecret {
+    let f = fs::File::open(
+        home::home_dir()
+            .unwrap()
+            .join(".google-service-cli/calendar3-secret.json"),
+    ).unwrap();
+
+    let console_secret: oauth2::ConsoleApplicationSecret = serde_json::from_reader(f).unwrap();
+
+    match console_secret.installed {
+        Some(secret) => secret,
+        None => todo!(),
+    }
 }