introduce a `mail_container` validation check

This introduces a new custoim validation check
`mail_container` for the uri-like syntax we use for specifying
sent/draft boxes in accounts

2 files changed, 23 insertions, 1 deletions

diff --git a/alot/checks.py b/alot/checks.py
new file mode 100644
index 00000000..693d3044
--- /dev/null
+++ b/alot/checks.py
@@ -0,0 +1,21 @@
+import mailbox
+import re
+from urlparse import urlparse
+
+def mail_container(value):
+    if not re.match(r'.*://.*', value):
+        raise VdtTypeError(value)
+    mburl = urlparse(value)
+    if mburl.scheme == 'mbox':
+        box = mailbox.mbox(mburl.path)
+    elif mburl.scheme == 'maildir':
+        box = mailbox.Maildir(mburl.path)
+    elif mburl.scheme == 'mh':
+        box = mailbox.MH(mburl.path)
+    elif mburl.scheme == 'babyl':
+        box = mailbox.Babyl(mburl.path)
+    elif mburl.scheme == 'mmdf':
+        box = mailbox.MMDF(mburl.path)
+    else:
+        raise VdtTypeError(value)
+    return box
diff --git a/alot/settings.py b/alot/settings.py
index 2a9b159e..7fcea787 100644
--- a/alot/settings.py
+++ b/alot/settings.py
@@ -11,6 +11,7 @@ from account import SendmailAccount, MatchSdtoutAddressbook, AbookAddressBook
 
 from alot.errors import ConfigError
 from alot.helper import read_config
+from checks import mail_container
 
 DEFAULTSPATH = os.path.join(os.path.dirname(__file__), 'defaults')
 
@@ -109,7 +110,7 @@ class SettingsManager(object):
     def read_config(self, path):
         """parse alot's config file from path"""
         spec = os.path.join(DEFAULTSPATH, 'alot.rc.spec')
-        newconfig = read_config(path, spec)
+        newconfig = read_config(path, spec, checks={'mail_container': mail_container})
         self._config.merge(newconfig)
 
         hooks_path = os.path.expanduser(self._config.get('hooksfile'))