refactor template with clap derive api

src/email/message/template/command/save.rs

@@ -0,0 +1,66 @@
+use anyhow::Result;
+use atty::Stream;
+use clap::Parser;
+use log::info;
+use mml::MmlCompilerBuilder;
+use std::io::{self, BufRead};
+
+use crate::{
+    account::arg::name::AccountNameFlag, backend::Backend, cache::arg::disable::DisableCacheFlag,
+    config::TomlConfig, folder::arg::name::FolderNameArg, printer::Printer,
+};
+
+/// Save a template to a folder
+#[derive(Debug, Parser)]
+pub struct TemplateSaveCommand {
+    #[command(flatten)]
+    pub folder: FolderNameArg,
+
+    /// The raw template to save
+    #[arg(raw = true, value_delimiter = ' ')]
+    pub raw: Vec<String>,
+
+    #[command(flatten)]
+    pub cache: DisableCacheFlag,
+
+    #[command(flatten)]
+    pub account: AccountNameFlag,
+}
+
+impl TemplateSaveCommand {
+    pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
+        info!("executing template save command");
+
+        let folder = &self.folder.name;
+        let account = self.account.name.as_ref().map(String::as_str);
+        let cache = self.cache.disable;
+
+        let (toml_account_config, account_config) =
+            config.clone().into_account_configs(account, cache)?;
+        let backend = Backend::new(toml_account_config, account_config.clone(), false).await?;
+
+        let is_tty = atty::is(Stream::Stdin);
+        let is_json = printer.is_json();
+        let tpl = if is_tty || is_json {
+            self.raw.join(" ").replace("\r", "")
+        } else {
+            io::stdin()
+                .lock()
+                .lines()
+                .filter_map(Result::ok)
+                .collect::<Vec<String>>()
+                .join("\n")
+        };
+
+        #[allow(unused_mut)]
+        let mut compiler = MmlCompilerBuilder::new();
+
+        #[cfg(feature = "pgp")]
+        compiler.set_some_pgp(config.pgp.clone());
+
+        let msg = compiler.build(tpl.as_str())?.compile().await?.into_vec()?;
+        backend.add_raw_message(folder, &msg).await?;
+
+        printer.print(format!("Template successfully saved to {folder}!"))
+    }
+}