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;;; jao-org-notes.el --- A simple system for org note taking -*- lexical-binding: t; -*-
;; Copyright (C) 2020, 2021 jao
;; Author: jao <mail@jao.io>
;; Keywords: tools
;; 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/>.
;;; Commentary:
;; An org note per file, with consultable title and tags and a
;; backlinks approximation.
;;; Code:
(require 'org)
(require 'consult)
(defvar jao-org-notes-dir (expand-file-name "notes" org-directory))
(defun jao-org-notes--rg (str)
`("rg" "--null" "--line-buffered" "--color=never" "--max-columns=250"
"--no-heading" "--line-number" "--smart-case" "." "-e"
,(format "^(#.(title|filetags): .*)%s" str)))
(defun jao-org-notes--clean-match (m)
(cons (format "%s %s"
(replace-regexp-in-string "^\\./" "" (car m))
(replace-regexp-in-string "[0-9]+:#\\+\\(file\\)?\\(title\\|tags\\):"
" (\\2)" (cadr m)))
(expand-file-name (car m) default-directory)))
(defun jao-org-notes--matches (lines)
(mapcar (lambda (l) (jao-org-notes--clean-match (split-string l "\0" t))) lines))
(defvar jao-org-notes--grep-history nil)
(defun jao-org--grep (prompt &optional cat no-req)
(let ((default-directory (expand-file-name (or cat "") jao-org-notes-dir)))
(consult--read
(consult--async-command #'jao-org-notes--rg
(consult--async-transform jao-org-notes--matches))
:prompt prompt
:lookup (lambda (_ cands cand) (or (cdr (assoc cand cands)) cand))
:initial (consult--async-split-initial "")
:add-history (concat (consult--async-split-initial (thing-at-point 'symbol)))
:require-match (not no-req)
:category 'jao-org-notes-lookup
:history '(:input jao-org-notes--grep-history))))
(defun jao-org-notes-cats ()
(seq-difference (directory-files jao-org-notes-dir) '("." ".." "attic")))
(defun jao-org-notes--cat ()
(let* ((cat (completing-read "Top level category: " (jao-org-notes-cats))))
(cond ((file-exists-p (expand-file-name cat jao-org-notes-dir)) cat)
((yes-or-no-p "New category, create?") cat)
(t (jao-roam--cat)))))
(defun jao-org-notes--insert-title ()
(let* ((cat (jao-org-notes--cat))
(title (file-name-base (jao-org--grep "Title: " cat t)))
(title (replace-regexp-in-string "^#" "" title)))
(when (not (string-empty-p title))
(let* ((base (replace-regexp-in-string " +" "-" (downcase title)))
(fname (expand-file-name (concat cat "/" base ".org")
jao-org-notes-dir))
(exists? (file-exists-p fname)))
(find-file fname)
(when (not exists?)
(insert "#+title: " title "\n")
t)))))
(defvar jao-org-notes--tags nil)
(defvar jao-org-notes-tags-cache-file "~/.emacs.d/cache/tags.eld")
(defun jao-org-notes--save-tags ()
(with-current-buffer (find-file-noselect jao-org-notes-tags-cache-file)
(delete-region (point-min) (point-max))
(print jao-org-notes--tags (current-buffer))
(let ((message-log-max nil)
(inhibit-message t))
(save-buffer))))
(defun jao-org-notes--read-tags-cache ()
(let ((b (find-file-noselect jao-org-notes-tags-cache-file)))
(with-current-buffer b (goto-char (point-min)))
(setq jao-org-notes--tags (read b))))
(defun jao-org-notes--read-tags ()
(unless jao-org-notes--tags (jao-org-notes--read-tags-cache))
(let* ((tags (completing-read-multiple "Tags: " jao-org-notes--tags))
(new-tags (seq-difference tags jao-org-notes--tags)))
(when new-tags
(setq jao-org--notes-tags
(sort (append new-tags jao-org-notes--tags) #'string<))
(jao-org-notes--save-tags))
tags))
(defun jao-org-notes--insert-tags ()
(insert "#+filetags: " (mapconcat #'identity (jao-org-notes--read-tags) " ") "\n"))
(defun jao-org-notes--insert-date ()
(insert "#+date: ")
(org-insert-time-stamp (current-time))
(insert "\n"))
(defun jao-org-notes--template (k)
`(,k "Note" plain (file jao-org-notes-open-or-create)
"\n- %a\n %i"
:jump-to-captured t))
;;;###autoload
(defun jao-org-notes-open ()
"Search for a note file, matching tags and titles with completion."
(interactive)
(when-let (f (jao-org--grep "Search notes: "))
(find-file f)))
;;;###autoload
(defun jao-org-notes-open-or-create ()
"Open or create a new note file, matching tags and titles with completion."
(interactive)
(when (jao-org-notes--insert-title)
(jao-org-notes--insert-date)
(jao-org-notes--insert-tags))
(save-buffer)
(buffer-file-name))
;;;###autoload
(defun jao-org-notes-backlinks ()
"Show a list of note files linking to the current one."
(interactive)
(consult-ripgrep jao-org-notes-dir
(concat "\\[\\[file:(.*/)?" (regexp-quote (buffer-name)))))
;;;###autoload
(defun jao-org-notes-insert-tags ()
"Insert a list of tags at point, with completing read."
(interactive)
(insert (mapconcat 'identity (jao-org-notes--read-tags) " ")))
;;;###autoload
(defun jao-org-notes-insert-link ()
"Select a note file (with completion) and insert a link to it."
(interactive)
(when-let (f (jao-org--grep "Notes file: "))
(let ((rel-path (file-relative-name f default-directory))
(title (with-current-buffer (find-file-noselect f)
(save-excursion
(goto-char (point-min))
(when (re-search-forward "^#\\+title: \\(.+\\)" nil t)
(match-string 1))))))
(insert (format "[[file:%s][%s]]" rel-path title)))))
;;;###autoload
(defun jao-org-notes-setup (mnemonic)
"Set up the notes system, providing a mnemonic character for its org template."
(setq org-capture-templates
(add-to-list 'org-capture-templates (jao-org-notes--template mnemonic)))
(when (fboundp 'org-capture-upgrade-templates)
(org-capture-upgrade-templates org-capture-templates)))
(provide 'jao-org-notes)
;;; jao-org-notes.el ends here
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