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;;; bbdb-anniv.el --- get anniversaries from BBDB -*- lexical-binding: t -*-
;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
;; This file is part of the Insidious Big Brother Database (aka BBDB),
;; BBDB 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.
;; BBDB 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 BBDB. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Anniversaries are stored in xfields as defined via `bbdb-anniv-alist'.
;; Each such field may contain multiple anniversaries entries with separators
;; defined via `bbdb-separator-alist' (newlines by default).
;; Each anniversary entry is a string DATE followed by optional TEXT.
;; DATE may take the same format as the date of ordinary diary entries.
;; In particular, `calendar-date-style' is obeyed via `diary-date-forms'.
;; If `bbdb-anniv-alist' has a non-nil FORM for this type of anniversary,
;; FORM is used to display the anniversary entry in the diary buffer.
;; If FORM is nil, TEXT is used instead to display the anniversary entry
;; in the diary buffer.
;;
;; To display BBDB anniversaries in the Emacs diary,
;; call `bbdb-initialize' with arg `anniv'.
;;
;; See the BBDB info manual for documentation.
;;; Code:
(require 'bbdb)
(require 'bbdb-com)
(require 'diary-lib)
(eval-when-compile
(require 'cl-lib))
(defcustom bbdb-anniv-alist
'((birthday . "%n's %d%s birthday")
(wedding . "%n's %d%s wedding anniversary")
(anniversary))
"Alist of rules for formatting anniversaries in the diary buffer.
Each element is of the form (LABEL . FORM).
LABEL is the xfield where this type of anniversaries is stored.
FORM is a format string with the following substitutions:
%n name of the record
%d number of years
%s ordinal suffix (st, nd, rd, th) for the year.
%t the optional text following the date string in field LABEL.
If FORM is nil, use the text following the date string in field LABEL
as format string."
:type '(repeat (cons :tag "Rule"
(symbol :tag "Label")
(choice (string)
(const nil))))
:group 'bbdb-utilities-anniv)
;; `bbdb-anniv-diary-entries' becomes a member of `diary-list-entries-hook'.
;; When this hook is run by `diary-list-entries', the variable `original-date'
;; is bound to the value of arg DATE of `diary-list-entries'.
;; Also, `number' is arg NUMBER of `diary-list-entries'.
;; `diary-list-entries' selects the entries for NUMBER days starting with DATE.
(defvar original-date) ; defined in diary-lib
(with-no-warnings (defvar number)) ; defined in diary-lib
;;;###autoload
(defun bbdb-anniv-diary-entries ()
"Add anniversaries from BBDB records to `diary-list-entries'.
This obeys `calendar-date-style' via `diary-date-forms'.
To enable this feature, put the following into your .emacs:
\(add-hook 'diary-list-entries-hook 'bbdb-anniv-diary-entries)"
;; Loop over NUMBER dates starting from ORGINAL-DATE.
(let* ((num-date (1- (calendar-absolute-from-gregorian original-date)))
(end-date (+ num-date number)))
(while (<= (setq num-date (1+ num-date)) end-date)
(let* ((date (calendar-gregorian-from-absolute num-date))
(dd (calendar-extract-day date))
(mm (calendar-extract-month date))
(yy (calendar-extract-year date))
;; We construct a regexp that only uses shy groups,
;; except for the part of the regexp matching the year.
;; This way we can grab the year from the date string.
(year "\\([0-9]+\\)\\|\\*")
(dayname (format "%s\\|%s\\.?" (calendar-day-name date)
(calendar-day-name date 'abbrev)))
(lex-env `((day . ,(format "0*%d" dd))
(month . ,(format "0*%d" mm)) (year . ,year)
(dayname . ,dayname)
(monthname . ,(format "%s\\|%s" (calendar-month-name mm)
(calendar-month-name mm 'abbrev)))))
;; Require that the matched date is at the beginning of the string.
(fmt (format "\\`%s?\\(?:%%s\\)"
(regexp-quote diary-nonmarking-symbol)))
date-forms)
(cl-flet ((fun (date-form)
(push (cons (format fmt
(mapconcat (lambda (form) (eval form lex-env))
(if (eq (car date-form) 'backup)
(cdr date-form) date-form)
"\\)\\(?:"))
(eq (car date-form) 'backup))
date-forms)))
(mapc #'fun diary-date-forms)
;; The anniversary of February 29 is considered to be March 1
;; in non-leap years. So we search for February 29, too.
(when (and (= mm 3) (= dd 1)
(not (calendar-leap-year-p yy)))
(setq lex-env `((day . "0*29") (month . "0*2") (year . ,year)
(dayname . ,dayname)
(monthname . ,(format "%s\\|%s" (calendar-month-name 2)
(calendar-month-name 2 'abbrev)))))
(mapc #'fun diary-date-forms)))
(dolist (record (bbdb-records))
(dolist (rule bbdb-anniv-alist)
(dolist (anniv (bbdb-record-xfield-split record (car rule)))
(let ((date-forms date-forms)
(anniv-string (concat anniv " X")) ; for backup forms
(case-fold-search t)
form yr text)
(while (setq form (pop date-forms))
(when (string-match (car form) anniv-string)
(setq date-forms nil
yr (match-string 1 anniv-string)
yr (if (and yr (string-match-p "[0-9]+" yr))
(- yy (string-to-number yr))
100) ; as in `diary-anniversary'
;; For backup forms we should search backward in
;; anniv-string from (match-end 0) for "\\<".
;; That gets too complicated here!
;; Yet for the default value of `diary-date-forms'
;; this would matter only if anniv-string started
;; with a time. That is rather rare for anniversaries.
;; Then we may simply step backward by one character.
text (substring anniv-string (if (cdr form) ; backup
(1- (match-end 0))
(match-end 0))
-1)
text (replace-regexp-in-string "\\`[ \t]+" "" text)
text (replace-regexp-in-string "[ \t]+\\'" "" text))
(if (cdr rule)
(setq text (replace-regexp-in-string "%t" text (cdr rule))))
;; Add the anniversaries to `diary-entries-list'.
(if (and (numberp yr) (< 0 (length text)))
(diary-add-to-list
date
;; `diary-add-to-list' expects an arg SPECIFIER for being
;; able to jump to the location of the entry in the diary
;; file. Here we only have BBDB records. So we use
;; an empty string for SPECIFIER, but instead we `propertize'
;; the STRING passed to `diary-add-to-list'.
(propertize
(format
;; Text substitution similar to `diary-anniversary'.
(replace-regexp-in-string "%n" (bbdb-record-name record) text)
yr (diary-ordinal-suffix yr))
'diary-goto-entry (list 'bbdb-display-records (list record)))
""))))))))))))
;; based on `diary-goto-entry'
(defun bbdb-anniv-goto-entry (button)
"Jump to the diary entry for the BUTTON at point.
The character at point may have a text property `diary-goto-entry'
which should be a list (FUNCTION ARG1 ARG2 ...). Then call FUNCTION
with args ARG1, ARG2, ... to locate the entry. Otherwise follow
the rules used by `diary-goto-entry'."
(let* ((fun-call (get-text-property (overlay-start button)
'diary-goto-entry))
(locator (button-get button 'locator))
(marker (car locator))
markbuf file)
(cond (fun-call
(apply (car fun-call) (cdr fun-call)))
;; If marker pointing to diary location is valid, use that.
((and marker (setq markbuf (marker-buffer marker)))
(pop-to-buffer markbuf)
(goto-char (marker-position marker)))
;; Marker is invalid (eg buffer has been killed).
((and (setq file (cadr locator))
(file-exists-p file)
(find-file-other-window file))
(when (eq major-mode (default-value 'major-mode)) (diary-mode))
(goto-char (point-min))
(if (re-search-forward (format "%s.*\\(%s\\)"
(regexp-quote (nth 2 locator))
(regexp-quote (nth 3 locator)))
nil t)
(goto-char (match-beginning 1))))
(t
(message "Unable to locate this diary entry")))))
;; `diary-goto-entry-function' is rather inflexible if multiple packages
;; want to use it for its purposes: this variable can be hijacked
;; only once. Here our function `bbdb-anniv-goto-entry' should work
;; for other packages, too.
(setq diary-goto-entry-function 'bbdb-anniv-goto-entry)
(provide 'bbdb-anniv)
;;; bbdb-anniv.el ends here
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