feat: add register command

src/youtube.rs

@@ -1,9 +1,9 @@
 use crate::{config::YoutubeConfig, error::TootubeError, peertube::PeerTubeVideo};
 use bytes::Bytes;
 use futures_core::stream::Stream;
-use reqwest::{Body, Client};
+use reqwest::{multipart::Form, Body, Client};
 use serde::{Deserialize, Serialize};
-use std::error::Error;
+use std::{error::Error, io::stdin};
 use tokio::sync::OnceCell;
 
 static ACCESS_TOKEN: OnceCell<String> = OnceCell::const_new();
@@ -34,6 +34,11 @@ struct AccessTokenResponse {
     access_token: String,
 }
 
+#[derive(Deserialize, Debug)]
+struct RegistrationAccessTokenResponse {
+    refresh_token: String,
+}
+
 #[derive(Serialize, Debug)]
 struct YoutubeUploadParams {
     snippet: YoutubeUploadParamsSnippet,
@@ -82,6 +87,41 @@ impl Default for YoutubeUploadParamsStatus {
     }
 }
 
+/// This function makes the registration process a little bit easier
+#[tokio::main]
+pub async fn register(config: &YoutubeConfig) -> Result<(), Box<dyn Error>> {
+    println!("Click on the link below to authorize {} to upload to YouTube and deal with your playlists:", env!("CARGO_PKG_NAME"));
+    println!("https://accounts.google.com/o/oauth2/v2/auth?client_id={}&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=https://www.googleapis.com/auth/youtube%20https://www.googleapis.com/auth/youtube.upload&response_type=code", config.client_id);
+    println!("Paste the returned authorization code:");
+
+    let mut input = String::new();
+    stdin()
+        .read_line(&mut input)
+        .expect("Unable to read back the authorization code!");
+
+    let form = Form::new()
+        .text("code", input)
+        .text("client_id", config.client_id.clone())
+        .text("client_secret", config.client_secret.clone())
+        .text("redirect_uri", "urn:ietf:wg:oauth:2.0:oob")
+        .text("grant_type", "authorization_code");
+
+    let client = Client::new();
+    let res = client
+        .post("https://accounts.google.com/o/oauth2/token")
+        .multipart(form)
+        .send()
+        .await?;
+
+    let refresh_token: RegistrationAccessTokenResponse = res.json().await?;
+
+    println!("You can now paste the following line inside the `youtube` section of your tootube.toml file:");
+
+    println!("refresh_token=\"{}\"", refresh_token.refresh_token);
+
+    Ok(())
+}
+
 /// Ensures that Token has been refreshed and that it is unique
 async fn refresh_token(config: &YoutubeConfig) -> Result<String, reqwest::Error> {
     ACCESS_TOKEN