Rewrite it in Rust

crunchy-cli-core/src/cli/login.rs

@@ -0,0 +1,39 @@
+use crate::utils::context::Context;
+use crate::Execute;
+use anyhow::bail;
+use anyhow::Result;
+use crunchyroll_rs::crunchyroll::SessionToken;
+use std::fs;
+use std::path::PathBuf;
+
+#[derive(Debug, clap::Parser)]
+#[clap(about = "Save your login credentials persistent on disk")]
+pub struct Login {
+    #[arg(help = "Remove your stored credentials (instead of save them)")]
+    #[arg(long)]
+    pub remove: bool,
+}
+
+#[async_trait::async_trait(?Send)]
+impl Execute for Login {
+    async fn execute(self, ctx: Context) -> Result<()> {
+        if let Some(login_file_path) = login_file_path() {
+            match ctx.crunchy.session_token().await {
+                SessionToken::RefreshToken(refresh_token) => Ok(fs::write(
+                    login_file_path,
+                    format!("refresh_token:{}", refresh_token),
+                )?),
+                SessionToken::EtpRt(etp_rt) => {
+                    Ok(fs::write(login_file_path, format!("etp_rt:{}", etp_rt))?)
+                }
+                SessionToken::Anonymous => bail!("Anonymous login cannot be saved"),
+            }
+        } else {
+            bail!("Cannot find config path")
+        }
+    }
+}
+
+pub fn login_file_path() -> Option<PathBuf> {
+    dirs::config_dir().map(|config_dir| config_dir.join(".crunchy-cli-core"))
+}