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;;; ~/.doom.d/org-gcal.el -*- lexical-binding: t; -*-
(require 'aio)
(require 'parse-time)
(setq-local lexical-binding t)
(setq plstore-cache-passphrase-for-symmetric-encryption t)
(defvar gcal-client-id)
(defvar gcal-client-secret)
(defvar google-calendar-readonly-scope
"https://www.googleapis.com/auth/calendar.readonly")
(defvar events-file "/home/grfn/notes/events.org")
(defun google--get-token (scope client-id client-secret)
(oauth2-auth-and-store
"https://accounts.google.com/o/oauth2/v2/auth"
"https://oauth2.googleapis.com/token"
scope
client-id
client-secret))
(cl-defun google--request (url &key method params scope)
(let ((p (aio-promise))
(auth-token (google--get-token scope gcal-client-id gcal-client-secret)))
(oauth2-url-retrieve
auth-token
url
(lambda (&rest _)
(goto-char (point-min))
(re-search-forward "^$")
(let ((resp (json-parse-buffer :object-type 'alist)))
(aio-resolve p (lambda () resp))))
nil
(or method "GET")
params)
p))
(cl-defun list-events (&key min-time max-time)
(google--request
(concat
"https://www.googleapis.com/calendar/v3/calendars/griffin@urbint.com/events"
"?timeMin=" (format-time-string "%Y-%m-%dT%T%z" min-time)
"&timeMax=" (format-time-string "%Y-%m-%dT%T%z" max-time))
:scope google-calendar-readonly-scope))
(defun last-week-events ()
(list-events :min-time (time-subtract
(current-time)
(seconds-to-time
(* 60 60 24 7)))
:max-time (current-time)))
(defun next-week-events ()
(list-events :min-time (current-time)
:max-time (time-add
(current-time)
(seconds-to-time
(* 60 60 24 7)))))
(defun attending-event? (event)
(let* ((attendees (append (alist-get 'attendees event) nil))
(self (--find (alist-get 'self it) attendees)))
(equal "accepted" (alist-get 'responseStatus self))))
(defun event->org-headline (event level)
(cl-flet ((make-time
(key)
(when-let ((raw-time (->> event (alist-get key) (alist-get 'dateTime))))
(format-time-string
(org-time-stamp-format t)
(parse-iso8601-time-string raw-time)))))
(if-let ((start-time (make-time 'start))
(end-time (make-time 'end)))
(s-format
"${headline} [[${htmlLink}][${summary}]] :event:
${startTime}--${endTime}
:PROPERTIES:
:LOCATION: ${location}
:EVENT: ${htmlLink}
:END:
${description}"
(function
(lambda (k m)
(or (alist-get (intern k) m)
(format "key not found: %s" k))))
(append
event
`((headline . ,(make-string level ?*))
(startTime . ,start-time)
(endTime . ,end-time))))
"")))
(defun write-events (events)
(with-current-buffer (find-file-noselect events-file)
(save-mark-and-excursion
(save-restriction
(widen)
(erase-buffer)
(goto-char (point-min))
(insert "#+TITLE: Events")
(newline) (newline)
(prog1
(loop for event in (append events nil)
when (attending-event? event)
do
(insert (event->org-headline event 1))
(newline)
sum 1)
(org-align-tags t))))))
(defun +grfn/sync-events ()
(interactive)
(let* ((events (alist-get 'items (aio-wait-for (next-week-events))))
(num-written (write-events events)))
(message "Successfully wrote %d events" num-written)))
(comment
((kind . "calendar#event")
(etag . "\"3174776941020000\"")
(id . "SNIP")
(status . "confirmed")
(htmlLink . "https://www.google.com/calendar/event?eid=SNIP")
(created . "2020-04-01T13:30:09.000Z")
(updated . "2020-04-20T13:14:30.510Z")
(summary . "SNIP")
(description . "SNIP")
(location . "SNIP")
(creator
(email . "griffin@urbint.com")
(self . t))
(organizer
(email . "griffin@urbint.com")
(self . t))
(start
(dateTime . "2020-04-01T12:00:00-04:00")
(timeZone . "America/New_York"))
(end
(dateTime . "2020-04-01T12:30:00-04:00")
(timeZone . "America/New_York"))
(recurrence .
["RRULE:FREQ=WEEKLY;UNTIL=20200408T035959Z;BYDAY=WE"])
(iCalUID . "SNIP")
(sequence . 0)
(attendees .
[((email . "griffin@urbint.com")
(organizer . t)
(self . t)
(responseStatus . "accepted"))
((email . "SNIP")
(displayName . "SNIP")
(responseStatus . "needsAction"))])
(extendedProperties
(private
(origRecurringId . "309q48kc1dihsvbi13pnlimb5a"))
(shared
(origRecurringId . "309q48kc1dihsvbi13pnlimb5a")))
(reminders
(useDefault . t)))
(require 'icalendar)
(icalendar--convert-recurring-to-diary
nil
"RRULE:FREQ=WEEKLY;UNTIL=20200408T035959Z;BYDAY=WE"
)
)
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