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Forked from d12frosted/agenda.el
Last active Sep 19, 2022
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(setq org-agenda-files-base org-agenda-files)
(defun vulpea-project-p ()
"Return non-nil if current buffer has any todo entry.
TODO entries marked as done are ignored, meaning that this
function returns nil if current buffer contains only completed
tasks."
(seq-find ; (3)
(lambda (type)
(eq type 'todo))
(org-element-map ; (2)
(org-element-parse-buffer 'headline) ; (1)
'headline
(lambda (h)
(org-element-property :todo-type h)))))
(defun vulpea-project-update-tag ()
"Update PROJECT tag in the current buffer."
(when (and (not (active-minibuffer-window))
(vulpea-buffer-p))
(save-excursion
(goto-char (point-min))
(let* ((tags (vulpea-buffer-tags-get))
(original-tags tags))
(if (vulpea-project-p)
(setq tags (cons "project" tags))
(setq tags (remove "project" tags)))
;; cleanup duplicates
(setq tags (seq-uniq tags))
;; update tags if changed
(when (or (seq-difference tags original-tags)
(seq-difference original-tags tags))
(apply #'vulpea-buffer-tags-set tags))))))
(defun vulpea-buffer-p ()
"Return non-nil if the currently visited buffer is a note."
(and buffer-file-name
(string-prefix-p
(expand-file-name (file-name-as-directory org-roam-directory))
(file-name-directory buffer-file-name))))
(defun vulpea-project-files ()
"Return a list of note files containing 'project' tag." ;
(seq-uniq
(seq-map
#'car
(org-roam-db-query
[:select [nodes:file]
:from tags
:left-join nodes
:on (= tags:node-id nodes:id)
:where (like tag (quote "%\"project\"%"))]))))
(defun vulpea-agenda-files-update (&rest _)
"Update the value of `org-agenda-files'."
(setq org-agenda-files (append org-agenda-files-base (vulpea-project-files))))
(add-hook 'find-file-hook #'vulpea-project-update-tag)
(add-hook 'before-save-hook #'vulpea-project-update-tag)
(advice-add 'org-agenda :before #'vulpea-agenda-files-update)
(advice-add 'org-todo-list :before #'vulpea-agenda-files-update)
;; functions borrowed from `vulpea' library
;; https://github.com/d12frosted/vulpea/blob/6a735c34f1f64e1f70da77989e9ce8da7864e5ff/vulpea-buffer.el
(defun vulpea-buffer-tags-get ()
"Return filetags value in current buffer."
(vulpea-buffer-prop-get-list "filetags" "[ :]"))
(defun vulpea-buffer-tags-set (&rest tags)
"Set TAGS in current buffer.
If filetags value is already set, replace it."
(if tags
(vulpea-buffer-prop-set
"filetags" (concat ":" (string-join tags ":") ":"))
(vulpea-buffer-prop-remove "filetags")))
(defun vulpea-buffer-tags-add (tag)
"Add a TAG to filetags in current buffer."
(let* ((tags (vulpea-buffer-tags-get))
(tags (append tags (list tag))))
(apply #'vulpea-buffer-tags-set tags)))
(defun vulpea-buffer-tags-remove (tag)
"Remove a TAG from filetags in current buffer."
(let* ((tags (vulpea-buffer-tags-get))
(tags (delete tag tags)))
(apply #'vulpea-buffer-tags-set tags)))
(defun vulpea-buffer-prop-set (name value)
"Set a file property called NAME to VALUE in buffer file.
If the property is already set, replace its value."
(setq name (downcase name))
(org-with-point-at 1
(let ((case-fold-search t))
(if (re-search-forward (concat "^#\\+" name ":\\(.*\\)")
(point-max) t)
(replace-match (concat "#+" name ": " value) 'fixedcase)
(while (and (not (eobp))
(looking-at "^[#:]"))
(if (save-excursion (end-of-line) (eobp))
(progn
(end-of-line)
(insert "\n"))
(forward-line)
(beginning-of-line)))
(insert "#+" name ": " value "\n")))))
(defun vulpea-buffer-prop-set-list (name values &optional separators)
"Set a file property called NAME to VALUES in current buffer.
VALUES are quoted and combined into single string using
`combine-and-quote-strings'.
If SEPARATORS is non-nil, it should be a regular expression
matching text that separates, but is not part of, the substrings.
If nil it defaults to `split-string-default-separators', normally
\"[ \f\t\n\r\v]+\", and OMIT-NULLS is forced to t.
If the property is already set, replace its value."
(vulpea-buffer-prop-set
name (combine-and-quote-strings values separators)))
(defun vulpea-buffer-prop-get (name)
"Get a buffer property called NAME as a string."
(org-with-point-at 1
(when (re-search-forward (concat "^#\\+" name ": \\(.*\\)")
(point-max) t)
(buffer-substring-no-properties
(match-beginning 1)
(match-end 1)))))
(defun vulpea-buffer-prop-get-list (name &optional separators)
"Get a buffer property NAME as a list using SEPARATORS.
If SEPARATORS is non-nil, it should be a regular expression
matching text that separates, but is not part of, the substrings.
If nil it defaults to `split-string-default-separators', normally
\"[ \f\t\n\r\v]+\", and OMIT-NULLS is forced to t."
(let ((value (vulpea-buffer-prop-get name)))
(when (and value (not (string-empty-p value)))
(split-string-and-unquote value separators))))
(defun vulpea-buffer-prop-remove (name)
"Remove a buffer property called NAME."
(org-with-point-at 1
(when (re-search-forward (concat "\\(^#\\+" name ":.*\n?\\)")
(point-max) t)
(replace-match ""))))
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