sync gcal events -> org-mode file

3 files changed, 174 insertions, 0 deletions

diff --git a/config.el b/config.el
index 5dfcbb5cd848..f01a8f9f0cf1 100644
--- a/config.el
+++ b/config.el
@@ -25,6 +25,7 @@
 (load! "show-matching-paren")
 (load! "irc")
 (load! "github-org")
+(load! "org-gcal")
 
 (require 's)
 
diff --git a/org-gcal.el b/org-gcal.el
new file mode 100644
index 000000000000..d31e705269a4
--- /dev/null
+++ b/org-gcal.el
@@ -0,0 +1,172 @@
+;;; ~/.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"
+  )
+
+ )
diff --git a/packages.el b/packages.el
index 5a29c60ae9c3..63a753eec4f7 100644
--- a/packages.el
+++ b/packages.el
@@ -56,6 +56,7 @@
 (package! request)
 (package! predd
   :recipe (:host github :repo "skeeto/predd"))
+(package! aio)
 
 ;; Haskell
 (package! lsp-haskell)