Serialize fediverse configuration

src/config.rs

@@ -14,7 +14,7 @@ pub struct Config {
     pub interval_seconds: MinMax,
     pub bot_token: String,
     pub chat_ref: ChatId,
-    pub fediverse_oauth_token: String,
+    pub fediverse_token: Option<mammut::Data>,
     pub post_buffer: u32,
 }
 
@@ -38,7 +38,7 @@ impl Default for Config {
                 max: 60 * 90,
             },
             post_buffer: 5,
-            fediverse_oauth_token: "".to_owned(),
+            fediverse_token: None,
             bot_token: "".to_owned(),
             chat_ref: ChatId::new(0),
         }

src/main.rs

@@ -4,7 +4,7 @@ use async_std::io::stdin;
 use futures_timer::Delay;
 use mammut::{
     apps::{AppBuilder, Scopes},
-    Registration,
+    Mastodon, Registration,
 };
 use rand::Rng;
 use telegram_bot::{Api, ChatRef};
@@ -48,22 +48,23 @@ async fn main() -> Result<(), Box<dyn Error>> {
     let mut registration = Registration::new(cfg.fediverse_base_url.clone());
     registration.register(app)?;
 
-    let token = if cfg.fediverse_oauth_token.is_empty() {
+    let mastodon = if let Some(data) = &cfg.fediverse_token {
+        Mastodon::from_data(data.clone())
+    } else {
         let url = registration.authorise()?;
         println!("{}", url);
 
         let mut buffer = String::new();
         stdin().read_line(&mut buffer).await?;
 
-        cfg.fediverse_oauth_token = buffer.clone();
+        let mastodon = registration.create_access_token(buffer)?;
+
+        cfg.fediverse_token = Some(mastodon.data.clone());
         cfg.save(CONFIG_PATH)?;
 
-        buffer
-    } else {
-        cfg.fediverse_oauth_token.clone()
+        mastodon
     };
 
-    let mastodon = registration.create_access_token(token)?;
     let publisher = MastodonPublisher::new(mastodon);
 
     let api = Arc::new(Api::new(cfg.bot_token.clone()));