From ef74951d4cdda3aff051951d1099ff4da16c89ed Mon Sep 17 00:00:00 2001
From: "Jakob L. Kreuze" <zerodaysfordays@sdf.lonestar.org>
Date: Fri, 26 Apr 2019 12:33:26 -0400
Subject: Implement `list-groups'

---
 brisket.hy | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/brisket.hy b/brisket.hy
index bf4d0d3..1489813 100644
--- a/brisket.hy
+++ b/brisket.hy
@@ -2,7 +2,7 @@
 (import [os [getenv makedirs]])
 (import [os.path [dirname expanduser]])
 (import [sys [argv exit stderr]])
-(import re)
+(import [re [match]])
 (import [nntplib [NNTP-SSL]])
 (import [subprocess [Popen PIPE]])
 
@@ -29,6 +29,16 @@
     (let [handler (get (globals) (.replace command "-" "_"))]
       (print (. handler __doc__)))))
 
+(defn list-groups [session &rest args]
+  "List groups on the server, matching a pattern if one is given.
+
+usage: list-groups [pattern (optional)]"
+  (let [pattern (if (>= (len args) 1) (nth args 0))
+        groups (second (.list session))]
+    (for [group groups]
+      (if (or (is pattern None) (match pattern group.group))
+          (print group.group)))))
+
 (defn make-config []
   "Create a default configuration file.
 
@@ -116,23 +126,15 @@ The lookup order is:
     ;; connection to the NNTP server.
     (if (= command "help")
         (help #* (drop 2 argv))
-        (with [session (NNTP_SSL HOST :user USER :password PASSWORD)]
-          ;; Otherwise, pull the function out of the global namespace.
-          (let [handler (get (globals) (.replace command "-" "_"))]
-            (handler #* (drop 2 argv)))))))
+        (let [user (get-username host)
+              password (get-password host)]
+          (with [session (NNTP_SSL host :user user :password password)]
+            ;; Otherwise, pull the function out of the global namespace.
+            (let [handler (get (globals) (.replace command "-" "_"))]
+              (handler session #* (drop 2 argv))))))))
 
 ;; # To-be-converted Python
 ;;
-;;
-;; def list_groups(n, *args):
-;;     pattern = args[0] if len(args) >= 1 else None
-;;
-;;     _, groups = n.list()
-;;
-;;     for group in groups:
-;;         if pattern is None or re.match(pattern, group.group):
-;;             print(group.group)
-;;
 ;; def describe_group(n, *args):
 ;;     if len(args) < 1:
 ;;         err("usage: describe-group [group]")
-- 
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