Change info gathering to proper db reads.

Running `xapian info` and parsing the output breaks way to easily, here
we instead just open the database file and look for ourselves.

3 files changed, 53 insertions, 11 deletions

diff --git a/mu4web/mu.py b/mu4web/mu.py
index f101245..d75d7a9 100644
--- a/mu4web/mu.py
+++ b/mu4web/mu.py
@@ -9,6 +9,10 @@ import subprocess
 from subprocess import PIPE
 import xml.dom.minidom
 import xml.dom
+from xdg.BaseDirectory import xdg_cache_home
+import os.path
+import xapian
+from datetime import datetime
 
 from typing import (
     Optional,
@@ -114,16 +118,37 @@ def search(query: str,
     return message_list
 
 
+def base_directory():
+    """
+    Returns where where mu stores its files.
+
+    Defaults to $XDG_CACHE_HOME/mu, but can be changed through the
+    environment variable MUHOME.
+
+    TODO make this configurable.
+    """
+    return os.getenv('MUHOME') or os.path.join(xdg_cache_home, 'mu')
+
+
 def info():
-    cmd = subprocess.Popen('mu info --nocolor'.split(' '),
-                           stdout=subprocess.PIPE,
-                           text=True)
-    out = {}
+
+    db = os.path.join(base_directory(), "xapian")
+
+    info = {
+        'database-path': db,
+    }
+
+    for key in ['changed', 'created', 'indexed']:
+        info[key] = datetime.fromtimestamp(int(xapian.metadata_get(db, key), 16))
+
+    for key in ['maildir', 'schema-version']:
+        info[key] = xapian.metadata_get(db, key)
+
+    cmd = subprocess.Popen(['xapian-delve', '-V3', '-1', db], stdout=subprocess.PIPE)
+    # Start at minus one to ignore header
+    count = -1
     for line in cmd.stdout:
-        if not line:
-            continue
-        if line[0] == '+':
-            continue
-        key, *value = [s.strip() for s in line.split('|') if s and not s.isspace()]
-        out[key] = '|'.join(value)
-    return out
+        count += 1
+    info['messages-in-store'] = count
+
+    return info
diff --git a/mu4web/xapian.py b/mu4web/xapian.py
new file mode 100644
index 0000000..8aebf72
--- /dev/null
+++ b/mu4web/xapian.py
@@ -0,0 +1,16 @@
+import subprocess
+from typing import Optional
+
+def metadata_list(db, prefix: Optional[str] = None) -> list[str]:
+    cmdline = ['xapian-metadata', 'list', db]
+    if prefix:
+        cmdline.append(prefix)
+    cmd = subprocess.run(cmdline, capture_output=True, text=True)
+    return cmd.stdout.split('\n')
+
+
+def metadata_get(db, key: str) -> str:
+    cmd = subprocess.run(['xapian-metadata', 'get', db, key],
+                         capture_output=True, text=True)
+    return cmd.stdout.strip()
+
diff --git a/setup.cfg b/setup.cfg
index b78ec59..ae42a9b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,6 +15,7 @@ install_requires =
 	flask >= 2.2.2
 	flask-login >= 0.6
 	urllib3 >= 1.26
+	pyxdg >= 0.28
 # optionally natsort >= 8.2
 # python-pam >= 2.0.2 for pam integration
 setup_requires =