Add automatic per-email address unread folders

server/src/lib.rs

@@ -793,7 +793,17 @@ impl FromStr for Query {
             if word == "is:unread" {
                 unread_only = true
             } else if word.starts_with("tag:") {
-                tags.push(word["tag:".len()..].to_string());
+                let t = &word["tag:".len()..];
+                // Per-address emails are faked as `tag:@<domain>/<username>`, rewrite to `to:` form
+                if t.starts_with('@') && t.contains('.') {
+                    let t = match t.split_once('/') {
+                        None => format!("to:{t}"),
+                        Some((domain, user)) => format!("to:{user}{domain}"),
+                    };
+                    remainder.push(t);
+                } else {
+                    tags.push(t.to_string());
+                };
 
                 /*
                             } else if word.starts_with("tag:") {

server/src/nm.rs

@@ -1,11 +1,7 @@
-use std::{
-    collections::HashMap,
-    fs::File,
-    hash::{DefaultHasher, Hash, Hasher},
-    time::Instant,
-};
+use std::{collections::HashMap, fs::File};
 
 use letterbox_notmuch::Notmuch;
+use letterbox_shared::compute_color;
 use log::{error, info, warn};
 use mailparse::{parse_content_type, parse_mail, MailHeader, MailHeaderMap, ParsedMail};
 use memmap::MmapOptions;
@@ -107,7 +103,6 @@ pub async fn search(
 
 #[instrument(name="nm::tags", skip_all, fields(needs_unread=needs_unread))]
 pub fn tags(nm: &Notmuch, needs_unread: bool) -> Result<Vec<Tag>, ServerError> {
-    let now = Instant::now();
     let unread_msg_cnt: HashMap<String, usize> = if needs_unread {
         // 10000 is an arbitrary number, if there's more than 10k unread messages, we'll
         //  get an inaccurate count.
@@ -123,13 +118,11 @@ pub fn tags(nm: &Notmuch, needs_unread: bool) -> Result<Vec<Tag>, ServerError> {
     } else {
         HashMap::new()
     };
-    let tags = nm
+    let tags: Vec<_> = nm
         .tags()?
         .into_iter()
         .map(|tag| {
-            let mut hasher = DefaultHasher::new();
-            tag.hash(&mut hasher);
-            let hex = format!("#{:06x}", hasher.finish() % (1 << 24));
+            let hex = compute_color(&tag);
             let unread = if needs_unread {
                 *unread_msg_cnt.get(&tag).unwrap_or(&0)
             } else {
@@ -142,8 +135,24 @@ pub fn tags(nm: &Notmuch, needs_unread: bool) -> Result<Vec<Tag>, ServerError> {
                 unread,
             }
         })
+        .chain(
+            nm.unread_recipients()?
+                .into_iter()
+                .filter_map(|(name, unread)| {
+                    let Some(idx) = name.find('@') else {
+                        return None;
+                    };
+                    let name = format!("{}/{}", &name[idx..], &name[..idx]);
+                    let bg_color = compute_color(&name);
+                    Some(Tag {
+                        name,
+                        fg_color: "white".to_string(),
+                        bg_color,
+                        unread,
+                    })
+                }),
+        )
         .collect();
-    info!("Fetching tags took {} seconds", now.elapsed().as_secs_f32());
     Ok(tags)
 }