Add ErcBar, also restore channel buffers from logs

[~bandali/configs] / spacemacs / .emacs.d / private / aminb / packages.el

diff --git a/spacemacs/.emacs.d/private/aminb/packages.el b/spacemacs/.emacs.d/private/aminb/packages.el
index fb9862b..99dd649 100644 (file)
--- a/spacemacs/.emacs.d/private/aminb/packages.el
+++ b/spacemacs/.emacs.d/private/aminb/packages.el
@@ -17,7 +17,7 @@
 ;;; Code:
 
 (defconst aminb-packages
-  '(crux writeroom-mode)
+  '(crux writeroom-mode znc)
   "The list of Lisp packages required by the aminb layer.")
 
 (defun aminb/init-crux ()
@@ -34,5 +34,99 @@
     :bind (("C-c W" . writeroom-mode)
            ("s-?" . writeroom-toggle-mode-line))))
 
+(defun aminb/init-znc ()
+  (use-package znc
+    :defer t
+    :init
+    (spacemacs/set-leader-keys
+      "aiz" 'znc-erc)
+    :config
+    (progn
+      ;; Set the erc nick completion postfix to ", "
+      (setq erc-pcomplete-nick-postfix ", ")
+
+      ;; Restore channel buffers from logs
+      (setq erc-log-insert-log-on-open t)
+
+      (defun vbe:znc-add-server (server port user networks)
+        "Add a server to the list of ZNC servers.
+We use SSL inconditionaly. Moreover, we don't store the password
+but put nil instead. At least, we tweak the username to contain
+the network name later, this will be separated again."
+        (add-to-list 'znc-servers
+                     (list server
+                           port
+                           t                  ; SSL enabled
+                           (mapcar (function (lambda (slug) (list slug
+                                                                  (format "%s/%s" user slug)
+                                                                  nil)))
+                                   networks))))
+
+      (defun vbe:znc-erc-ssl-connector (&rest R)
+        "Connect to ERC using SSL and retrieve password with `auth-source-search'.
+Moreover, handle multiple networks by sending the password with
+the appropriate network slug that we extract from the nick."
+        (let* ((user (nth 0 (split-string (plist-get R :nick) "/")))
+               (slug (nth 1 (split-string (plist-get R :nick) "/")))
+               (found (nth 0 (auth-source-search :host (plist-get R :server)
+                                                 :user user
+                                                 :require '(:user :secret)
+                                                 :max 1))))
+          (if found
+              (let ((password (let ((secret (plist-get found :secret)))
+                                (if (functionp secret)
+                                    (funcall secret)
+                                  secret))))
+                (plist-put R :password (format "%s/%s:%s" user slug password))
+                (plist-put R :nick user)
+                (apply 'erc-tls R)))))
+      (setq znc-erc-ssl-connector 'vbe:znc-erc-ssl-connector)
+
+      ;; Define networks
+      (vbe:znc-add-server "nix.aminb.org" 6669 "amin"
+                          '(freenode mozilla))
+
+      ;; https://www.emacswiki.org/emacs/ErcBar
+      ;; Display a bar before unread messages
+      (eval-after-load 'erc-track
+        '(progn
+           (defun erc-bar-move-back (n)
+             "Moves back n message lines. Ignores wrapping, and server messages."
+             (interactive "nHow many lines ? ")
+             (re-search-backward "^.*<.*>" nil t n))
+
+           (defun erc-bar-update-overlay ()
+             "Update the overlay for current buffer, based on the content of
+erc-modified-channels-alist. Should be executed on window change."
+             (interactive)
+             (let* ((info (assq (current-buffer) erc-modified-channels-alist))
+                    (count (cadr info)))
+               (if (and info (> count erc-bar-threshold))
+                   (save-excursion
+                     (end-of-buffer)
+                     (when (erc-bar-move-back count)
+                       (let ((inhibit-field-text-motion t))
+                         (move-overlay erc-bar-overlay
+                                       (line-beginning-position)
+                                       (line-end-position)
+                                       (current-buffer)))))
+                 (delete-overlay erc-bar-overlay))))
+
+           (defvar erc-bar-threshold 1
+             "Display bar when there are more than erc-bar-threshold unread messages.")
+           (defvar erc-bar-overlay nil
+             "Overlay used to set bar")
+           (setq erc-bar-overlay (make-overlay 0 0))
+           (overlay-put erc-bar-overlay 'face '(:underline "purple"))
+           ;;put the hook before erc-modified-channels-update
+           (defadvice erc-track-mode (after erc-bar-setup-hook
+                                            (&rest args) activate)
+             ;;remove and add, so we know it's in the first place
+             (remove-hook 'window-configuration-change-hook 'erc-bar-update-overlay)
+             (add-hook 'window-configuration-change-hook 'erc-bar-update-overlay))
+           (add-hook 'erc-send-completed-hook (lambda (str)
+                                                (erc-bar-update-overlay)))))
+
+      )))
 
 ;;; packages.el ends here