Add no auth mode

.gitignore

@@ -1,4 +1,3 @@
 /target
 *.html
-config.json
-timetable.json
+*.json

rezvrh_cli/src/main.rs

@@ -8,8 +8,8 @@ use tokio::fs;
 #[derive(Serialize, Deserialize)]
 pub struct Config {
     url: String,
-    username: String,
-    password: String,
+    username: Option<String>,
+    password: Option<String>,
 }
 
 #[derive(Parser, Debug)]
@@ -25,11 +25,14 @@ async fn main() -> anyhow::Result<()> {
     let args = Args::parse();
 
     let s = fs::read_to_string(args.config)
-        .await
-        .expect("failed to load config.json");
-    let conf = serde_json::from_str::<Config>(&s).expect("failed to parse config.json");
+        .await?;
+    let conf = serde_json::from_str::<Config>(&s)?;
     let url = Url::parse(&conf.url)?;
-    let bakalari = Bakalari::from_creds((conf.username, conf.password), url).await?;
+    let bakalari = if let (Some(username), Some(password)) = (conf.username, conf.password) {
+        Bakalari::from_creds((username, password), url).await?
+    } else {
+        Bakalari::no_auth(url).await?
+    };
     bakalari.test().await?;
 
     let typ = Select::new("Choose type", vec![Type::Teacher, Type::Class, Type::Room]).prompt()?;
@@ -50,8 +53,7 @@ async fn main() -> anyhow::Result<()> {
         Type::Teacher => bakalari.get_teacher(&select),
         Type::Class => bakalari.get_class(&select),
         Type::Room => bakalari.get_room(&select),
-    }
-    .unwrap();
+    }.unwrap();
 
     let table = bakalari.get_timetable(which, &selection).await?;
 

rezvrh_scraper/src/modules/auth.rs

@@ -31,6 +31,7 @@ pub enum Auth {
     Credentials(Credentials),
     // Token (might expire)
     Token(String),
+    None,
 }
 
 impl Auth {
@@ -42,6 +43,7 @@ impl Auth {
         match self {
             Self::Token(token) => Ok(Cow::Borrowed(token)),
             Self::Credentials(creds) => Ok(Cow::Owned(creds.get_token(client.clone()).await?)),
+            Self::None => Ok(Cow::Owned(String::new())),
         }
     }
 

rezvrh_scraper/src/modules/bakalari.rs

@@ -102,6 +102,23 @@ impl Bakalari {
         })
     }
 
+    /// Create Bakalari instance without authentication
+    /// 
+    /// # Errors
+    /// Returns error if authentication fails
+    pub async fn no_auth(url: Url) -> Result<Self, RequestError> {
+        let client = Arc::new(Client::new(url));
+        let (classes, teachers, rooms) =
+            get_info(client.reqwest_client(), client.url(), "").await?;
+        Ok(Self {
+            client,
+            auth: Auth::None,
+            classes,
+            teachers,
+            rooms,
+        })
+    }
+
     /// Get token
     ///
     /// # Errors