From ca45a90930a5bee6b9cca389a3449e44720c7c79 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Mon, 20 Apr 2026 22:19:50 -0400
Subject: [PATCH] Add Mail card

---
 bin/malpd       |  29 +++++++++++
 cgi-bin/malp.rb | 132 +++++++++++++++++++++++++++++++-----------------
 2 files changed, 115 insertions(+), 46 deletions(-)

diff --git a/bin/malpd b/bin/malpd
index 53ab682..1122fc4 100755
--- a/bin/malpd
+++ b/bin/malpd
@@ -4,6 +4,7 @@ require "socket"
 require "fileutils"
 require "json"
 require "shellwords"
+require "etc"
 
 SOCKET_PATH = "/run/malpd/malpd.sock"
 
@@ -212,6 +213,33 @@ def read_server_info
   info
 end
 
+def read_mail
+  users = []
+
+  ["root", "josh"].each do |user|
+    begin
+      home = Etc.getpwnam(user).dir
+    rescue ArgumentError
+      next
+    end
+
+    count = 0
+    mbox = ["/var/mail/#{user}", "/var/spool/mail/#{user}"].find { |p| File.exist?(p) }
+    if mbox
+      content = File.read(mbox) rescue ""
+      count = content.scan(/^From /).size
+    end
+
+    users << {
+      "user"        => user,
+      "count"       => count,
+      "dead_letter" => File.exist?(File.join(home, "dead.letter"))
+    }
+  end
+
+  { "type" => "mail", "users" => users }
+end
+
 def read_ups
   out = `apcaccess 2>/dev/null`
   return nil unless $?.success? && !out.empty?
@@ -279,6 +307,7 @@ def handle_info(conn)
   info.concat(read_virtual_machines)
 
   info << read_server_info
+  info << read_mail
 
   if (ups = read_ups)
     info << ups
diff --git a/cgi-bin/malp.rb b/cgi-bin/malp.rb
index 745eb56..293d228 100755
--- a/cgi-bin/malp.rb
+++ b/cgi-bin/malp.rb
@@ -369,7 +369,10 @@ if cgi.params.key?("content")
     end
 
     upses = info.select { |e| e["type"] == "ups" }
-    if drives.any? || upses.any?
+    mail = info.find { |e| e["type"] == "mail" }
+    mail_visible = mail && (mail["users"] || []).any?
+
+    if drives.any? || upses.any? || mail_visible
       html << %(<div style="display:grid;grid-template-columns:2fr 1fr;gap:1rem;align-items:start;margin-top:1rem;">)
     end
 
@@ -411,56 +414,93 @@ if cgi.params.key?("content")
       html << %(</div>)
     end
 
-    upses.each do |ups|
-      status = ups["status"].to_s
-      online = status.include?("ONLINE")
-      card_cls = online ? "ok" : "bad"
-
-      model = ups["model"] ? "APC " + CGI.escapeHTML(ups["model"]) : "UPS"
-
-      stats = []
-      stats << [online ? "ok" : "bad", CGI.escapeHTML(status)] unless status.empty?
-
-      if (charge = ups["charge"])
-        cls = charge >= 80 ? "ok" : charge >= 50 ? "warn" : "bad"
-        stats << [cls, "Charge #{charge.round}%"]
-      end
-      if (timeleft = ups["timeleft"])
-        cls = timeleft >= 10 ? "ok" : timeleft >= 5 ? "warn" : "bad"
-        stats << [cls, "#{timeleft.round(1)} min left"]
-      end
-      if (load = ups["load"])
-        cls = load >= 90 ? "bad" : load >= 70 ? "warn" : "ok"
-        stats << [cls, "Load #{load.round}%"]
-      end
-      if (lv = ups["line_voltage"])
-        stats << ["ok", "Line #{lv.round} V"]
-      end
-      if (bv = ups["battery_voltage"])
-        stats << ["ok", "Batt #{bv.round(1)} V"]
-      end
-
-      stats_html = stats.map { |c, txt|
-        %(<span class="stat #{c}">#{txt}</span>)
-      }.join
-      stats_block = stats.empty? ? "" :
-        %(<div class="drive-stats" style="margin-top:0.6rem;">#{stats_html}</div>)
-
+    if upses.any? || mail_visible
       html << %(<div>)
-      html << %(<div class="section-label">UPS</div>)
-      html << <<~HTML
-        <div class="card #{card_cls}">
-          <div class="card-header">
-            <span class="card-title">#{model}</span>
-            <span class="badge #{card_cls}">#{online ? "Online" : CGI.escapeHTML(status)}</span>
+
+      upses.each do |ups|
+        status = ups["status"].to_s
+        online = status.include?("ONLINE")
+        card_cls = online ? "ok" : "bad"
+
+        model = ups["model"] ? "APC " + CGI.escapeHTML(ups["model"]) : "UPS"
+
+        stats = []
+        stats << [online ? "ok" : "bad", CGI.escapeHTML(status)] unless status.empty?
+
+        if (charge = ups["charge"])
+          cls = charge >= 80 ? "ok" : charge >= 50 ? "warn" : "bad"
+          stats << [cls, "Charge #{charge.round}%"]
+        end
+        if (timeleft = ups["timeleft"])
+          cls = timeleft >= 10 ? "ok" : timeleft >= 5 ? "warn" : "bad"
+          stats << [cls, "#{timeleft.round(1)} min left"]
+        end
+        if (load = ups["load"])
+          cls = load >= 90 ? "bad" : load >= 70 ? "warn" : "ok"
+          stats << [cls, "Load #{load.round}%"]
+        end
+        if (lv = ups["line_voltage"])
+          stats << ["ok", "Line #{lv.round} V"]
+        end
+        if (bv = ups["battery_voltage"])
+          stats << ["ok", "Batt #{bv.round(1)} V"]
+        end
+
+        stats_html = stats.map { |c, txt|
+          %(<span class="stat #{c}">#{txt}</span>)
+        }.join
+        stats_block = stats.empty? ? "" :
+          %(<div class="drive-stats" style="margin-top:0.6rem;">#{stats_html}</div>)
+
+        html << %(<div class="section-label">UPS</div>)
+        html << <<~HTML
+          <div class="card #{card_cls}">
+            <div class="card-header">
+              <span class="card-title">#{model}</span>
+              <span class="badge #{card_cls}">#{online ? "Online" : CGI.escapeHTML(status)}</span>
+            </div>
+            #{stats_block}
           </div>
-          #{stats_block}
-        </div>
-      HTML
+        HTML
+      end
+
+      if mail_visible
+        users = mail["users"]
+        has_warn = users.any? { |u| u["count"].to_i > 0 || u["dead_letter"] }
+        mail_card_cls = has_warn ? "warn" : "ok"
+
+        html << %(<div class="section-label">Mail</div>)
+        html << %(<div class="card #{mail_card_cls}"><div class="card-header"><span class="card-title">Local Mail</span></div><div class="subitems">)
+
+        users.each do |u|
+          count = u["count"].to_i
+          cls = count > 0 ? "warn" : "ok"
+          label = count == 1 ? "1 message" : "#{count} messages"
+          html << <<~HTML
+            <div class="subitem">
+              <div class="subitem-left"><div class="dot #{cls}"></div><span class="subitem-name">#{CGI.escapeHTML(u["user"].to_s)}</span></div>
+              <span class="subitem-value #{cls}">#{label}</span>
+            </div>
+          HTML
+        end
+
+        html << %(</div>)
+
+        dead = users.select { |u| u["dead_letter"] }
+        if dead.any?
+          stats_html = dead.map { |u|
+            %(<span class="stat warn">dead.letter in ~#{CGI.escapeHTML(u["user"].to_s)}</span>)
+          }.join
+          html << %(<div class="drive-stats" style="margin-top:0.6rem;">#{stats_html}</div>)
+        end
+
+        html << %(</div>)
+      end
+
       html << %(</div>)
     end
 
-    if drives.any? || upses.any?
+    if drives.any? || upses.any? || mail_visible
       html << %(</div>)
     end