overview: unread count of each mailbox

src/bin/overview.rs

@@ -0,0 +1,35 @@
+use std::array::IntoIter;
+
+use ascii_table::{AsciiTable, Align, Column};
+use inboxid::*;
+
+fn main() -> Result<()> {
+	let mut dirs = get_maildirs()?;
+	dirs.sort_unstable();
+	let mut rows = vec![];
+	for dir in dirs {
+		let maildir = get_maildir(&dir)?;
+		let unread = maildir
+			.list_cur()
+			.map(|x| if x.map(|x| !x.flags().contains(SEEN)).unwrap_or(true) { 1 } else { 0 })
+			.sum::<usize>();
+		if unread > 0 {
+			rows.push(IntoIter::new([dir, unread.to_string()]));
+		}
+	}
+	let mut ascii_table = AsciiTable::default();
+	ascii_table.draw_lines = false;
+	ascii_table.max_width = usize::MAX;
+	for (i, &(header, align)) in [
+		("Mailbox", Align::Left),
+		("Unread", Align::Right),
+	].iter().enumerate() {
+		let mut column = Column::default();
+		column.header = header.to_owned();
+		column.align = align;
+		column.max_width = usize::MAX;
+		ascii_table.columns.insert(i, column);
+	}
+	ascii_table.print(rows); // prints a 0 if empty :)
+	Ok(())
+}

src/lib.rs

@@ -1,6 +1,6 @@
 use std::{borrow::Cow, convert::{TryFrom, TryInto}, env, fmt::{Debug, Display}, fs, hash::Hash, io, net::TcpStream, ops::Deref, path::PathBuf};
 
-use anyhow::Context;
+use anyhow::{anyhow, Context};
 use chrono::{DateTime, Local, NaiveDateTime, TimeZone};
 use cursive::{theme::{BaseColor, Color, ColorStyle, ColorType, Effect, Style}, utils::span::{IndexedCow, IndexedSpan, SpannedString}};
 use cursive_tree_view::TreeEntry;
@@ -43,6 +43,21 @@ pub fn connect(host: &str, port: u16, user: &str, password: &str) -> Result<Imap
 	Ok(client.login(user, password).map_err(|e| e.0)?)
 }
 
+pub fn get_maildirs() -> Result<Vec<String>> {
+	let maildir = env::var("MAILDIR").expect("missing envvar MAILDIR");
+	let mut dirs = vec![];
+	for dir in fs::read_dir(&maildir)? {
+		let dir = dir?;
+		if dir.file_type()?.is_dir() {
+			let name = dir.file_name().into_string().map_err(|_| anyhow!("failed to decode directory name"))?;
+			if !name.starts_with('.') {
+				dirs.push(name);
+			}
+		}
+	}
+	Ok(dirs)
+}
+
 pub fn get_maildir(mailbox: &str) -> Result<Maildir> {
 	let maildir = env::var("MAILDIR").expect("missing envvar MAILDIR");
 	let maildir = format!("{}/{}", maildir, mailbox);