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;;; jao-minibuffer-tracking.el --- Tracking notifications in minibuffer  -*- lexical-binding: t; -*-

;; Copyright (C) 2021  jao

;; Author: jao <mail@jao.io>
;; Keywords: convenience

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Code:

(require 'tracking)
(require 'shorten)
(require 'jao-minibuffer)


;; shorten
(defun jao-shorten-modes (&rest modes)
  (dolist (m modes) (add-to-list 'tracking-shorten-modes m)))

(defun jao-tracking--clean-slack (s)
  (let* ((s (replace-regexp-in-string
             "^\\*Slack - .*? : \\(mpdm-\\)?\\([^ ]+\\)\\( \\(T\\)\\)?.*"
             "#\\2\\4"
             s))
         (s (replace-regexp-in-string "logstash-\\([^-]+\\)-\\(.+\\)"
                                      "\\2-\\1"
                                      s)))
    (replace-regexp-in-string "^[^a-zA-Z#]+" "#" s)))

(defun jao-tracking-shorten-aggressively (lst tail-count)
  (let* ((s (shorten-join-sans-tail lst tail-count)))
    (if (string-match-p "^#" s) (substring s 1 nil) s)))

(defun jao-tracking-split-clean (s)
  (shorten-split (jao-tracking--clean-slack s)))

(defun jao-tracking-shorten (old-func &rest args)
  (let ((shorten-join-function #'jao-tracking-shorten-aggressively)
        (shorten-split-function #'jao-tracking-split-clean))
    (apply old-func args)))

(advice-add #'tracking-shorten :around #'jao-tracking-shorten)


;; additional highlighting
(defvar jao-tracking-highlight-rx "$^")

(defun jao-tracking-faces (&rest faces)
  (dolist (face faces)
    (add-to-list 'tracking-faces-priorities face)))

(defun jao-tracking-add-buffer (old-func &rest args)
  (let* ((buffer (car args))
         (faces (if (and buffer
                         (string-match-p jao-tracking-highlight-rx
                                         (buffer-name buffer)))
                    (cons 'lui-highlight-face (cadr args))
                  (cadr args))))
    (funcall old-func buffer faces)))

(advice-add 'tracking-add-buffer :around #'jao-tracking-add-buffer)
(jao-tracking-faces 'lui-highlight-face)


;; minibuffer
(defvar jao-tracking-string "")
(defvar jao-tracking-bkg "grey93")

(defface jao-tracking-minibuffer `((t :background ,jao-tracking-bkg)) ""
  :group 'faces)
(defface jao-tracking-minibuffer-sep
  `((t :foreground ,jao-tracking-bkg :background ,jao-tracking-bkg)) ""
  :group 'faces)

(defun jao-tracking-set-log (v)
  (when (member window-system '(x))
    (x-change-window-property "_EMACS_LOG" v nil nil nil nil 0)))

(jao-tracking-set-log "")

(defun jao-tracking--buffer-str (s)
  (if (listp s)
      `(:propertize ,(plist-get s :propertize)
                    face
                    (jao-tracking-minibuffer
                     ,@(when-let ((f (plist-get s 'face)))
                         (jao-tracking-set-log " * ")
                         (list f))))
    `(:propertize "|" face jao-tracking-minibuffer-sep)))

(defun jao-tracking-build-str (new-val)
  (jao-tracking-set-log "")
  (if (listp new-val)
      (mapcar #'jao-tracking--buffer-str new-val)
    new-val))

(defun jao-tracking-update-minibuffer (&rest _)
  (setq jao-tracking-string (jao-tracking-build-str (tracking-status)))
  (jao-minibuffer-refresh))

(defun jao-tracking-echo (_sym new-val _op _where)
  (setq jao-tracking-string (jao-tracking-build-str new-val))
  (jao-minibuffer-refresh))

(jao-minibuffer-add-variable 'jao-tracking-string -10)
(add-variable-watcher 'tracking-mode-line-buffers #'jao-tracking-echo)
;; since we're using the minibuffer, forget the mode line
(advice-add #'tracking-mode :override (lambda (&optional _) (interactive)))

(provide 'jao-tracking)
;;; jao-minibuffer-tracking.el ends here