refactor envelope with clap derive api

src/email/envelope/command/list.rs

@@ -0,0 +1,68 @@
+use anyhow::Result;
+use clap::Parser;
+use log::info;
+
+use crate::{
+    account::arg::name::AccountNameFlag,
+    backend::Backend,
+    cache::arg::disable::DisableCacheFlag,
+    config::TomlConfig,
+    folder::arg::name::FolderNameOptionalArg,
+    printer::{PrintTableOpts, Printer},
+    ui::arg::max_width::MaxTableWidthFlag,
+};
+
+/// List all envelopes from a folder
+#[derive(Debug, Parser)]
+pub struct EnvelopeListCommand {
+    #[command(flatten)]
+    pub folder: FolderNameOptionalArg,
+
+    /// The page number
+    #[arg(long, short, value_name = "NUMBER", default_value = "1")]
+    pub page: usize,
+
+    /// The page size
+    #[arg(long, short = 's', value_name = "NUMBER")]
+    pub page_size: Option<usize>,
+
+    #[command(flatten)]
+    pub table: MaxTableWidthFlag,
+
+    #[command(flatten)]
+    pub account: AccountNameFlag,
+
+    #[command(flatten)]
+    pub cache: DisableCacheFlag,
+}
+
+impl EnvelopeListCommand {
+    pub async fn execute(self, printer: &mut impl Printer, config: &TomlConfig) -> Result<()> {
+        info!("executing envelope list command");
+
+        let folder = &self.folder.name;
+
+        let some_account_name = self.account.name.as_ref().map(String::as_str);
+        let (toml_account_config, account_config) = config
+            .clone()
+            .into_account_configs(some_account_name, self.cache.disable)?;
+        let backend = Backend::new(toml_account_config, account_config.clone(), false).await?;
+
+        let page_size = self
+            .page_size
+            .unwrap_or(account_config.email_listing_page_size());
+        let page = 1.max(self.page) - 1;
+
+        let envelopes = backend.list_envelopes(folder, page_size, page).await?;
+
+        printer.print_table(
+            Box::new(envelopes),
+            PrintTableOpts {
+                format: &account_config.email_reading_format,
+                max_width: self.table.max_width,
+            },
+        )?;
+
+        Ok(())
+    }
+}