feat: add register command

src/lib.rs

@@ -12,6 +12,7 @@ mod peertube;
 use peertube::{get_latest_video, get_max_resolution_dl};
 
 mod youtube;
+pub use youtube::register;
 use youtube::{create_resumable_upload, now_kiss};
 
 async fn get_dl_video_stream(

src/main.rs

@@ -17,8 +17,30 @@ fn main() {
                 .default_value(DEFAULT_CONFIG_PATH)
                 .display_order(1),
         )
+        .subcommand(
+            Command::new("register")
+                .version(env!("CARGO_PKG_VERSION"))
+                .about("Command to register to YouTube OAuth2.0")
+                .arg(
+                    Arg::new("config")
+                        .short('c')
+                        .long("config")
+                        .value_name("CONFIG_FILE")
+                        .help("TOML config file for tootube")
+                        .num_args(1)
+                        .default_value(DEFAULT_CONFIG_PATH)
+                        .display_order(1),
+                ),
+        )
         .get_matches();
 
+    if let Some(("register", sub_m)) = matches.subcommand() {
+        let config = parse_toml(sub_m.get_one::<String>("config").unwrap());
+        register(&config.youtube)
+            .unwrap_or_else(|e| panic!("Cannot register to YouTube API: {}", e));
+        return;
+    }
+
     let config = parse_toml(matches.get_one::<String>("config").unwrap());
 
     env_logger::init();

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();
@@ -32,6 +32,7 @@ impl Default for RefreshTokenRequest {
 #[derive(Deserialize, Debug)]
 struct AccessTokenResponse {
     access_token: String,
+    refresh_token: String,
 }
 
 #[derive(Serialize, Debug)]
@@ -82,6 +83,41 @@ 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 access_token: AccessTokenResponse = res.json().await?;
+
+    println!("You can now paste the following line inside the `youtube` section of your tootube.toml file:");
+
+    println!("refresh_token=\"{}\"", access_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