add magtag gcal

Author: brentru

MagTag_Google_Calendar/authenticator.py

@@ -0,0 +1,112 @@
+# Google OAuth2.0 Workflow for MagTag
+import ssl
+import board
+import wifi
+import socketpool
+import adafruit_requests as requests
+from adafruit_oauth2 import OAuth2
+from adafruit_display_text.label import Label
+from adafruit_bitmap_font import bitmap_font
+from adafruit_magtag.magtag import Graphics
+from adafruit_display_shapes.rect import Rect
+
+# Add a secrets.py to your filesystem that has a dictionary called secrets with "ssid" and
+# "password" keys with your WiFi credentials. DO NOT share that file or commit it into Git or other
+# source control.
+# pylint: disable=no-name-in-module,wrong-import-order
+try:
+    from secrets import secrets
+except ImportError:
+    print("Credentials and tokens are kept in secrets.py, please add them there!")
+    raise
+
+print("Connecting to %s" % secrets["ssid"])
+wifi.radio.connect(secrets["ssid"], secrets["password"])
+print("Connected to %s!" % secrets["ssid"])
+
+pool = socketpool.SocketPool(wifi.radio)
+requests = requests.Session(pool, ssl.create_default_context())
+
+font_small = bitmap_font.load_font("/fonts/Arial-12.pcf")
+font_large = bitmap_font.load_font("/fonts/Arial-14.pcf")
+
+graphics = Graphics(auto_refresh=False)
+display = graphics.display
+
+background = Rect(0, 0, 296, 128, fill=0xFFFFFF)
+graphics.splash.append(background)
+
+label_overview_text = Label(
+    font_large,
+    x=0,
+    y=10,
+    line_spacing=0.75,
+    color=0x000000,
+    text="Authorize this device with Google:",
+)
+graphics.splash.append(label_overview_text)
+
+label_verification_url = Label(
+    font_small, x=0, y=40, line_spacing=0.75, color=0x000000, max_glyphs=90
+)
+graphics.splash.append(label_verification_url)
+
+label_user_code = Label(
+    font_small, x=0, y=80, color=0x000000, line_spacing=0.75, max_glyphs=50
+)
+graphics.splash.append(label_user_code)
+
+label_qr_code = Label(
+    font_small, x=0, y=100, color=0x000000, text="Or scan the QR code:"
+)
+graphics.splash.append(label_qr_code)
+
+# Set scope(s) of access required by the API you're using
+scopes = ["https://www.googleapis.com/auth/calendar.readonly"]
+
+# Initialize an OAuth2 object
+google_auth = OAuth2(
+    requests, secrets["google_client_id"], secrets["google_client_secret"], scopes
+)
+
+# Request device and user codes
+# https://developers.google.com/identity/protocols/oauth2/limited-input-device#step-1:-request-device-and-user-codes
+google_auth.request_codes()
+
+# Display user code and verification url
+# NOTE: If you are displaying this on a screen, ensure the text label fields are
+# long enough to handle the user_code and verification_url.
+# Details in link below:
+# https://developers.google.com/identity/protocols/oauth2/limited-input-device#displayingthecode
+print(
+    "1) Navigate to the following URL in a web browser:", google_auth.verification_url
+)
+print("2) Enter the following code:", google_auth.user_code)
+label_verification_url.text = (
+    "1. On your computer or mobile device,\ngo to %s" % google_auth.verification_url
+)
+label_user_code.text = "2. Enter code: %s" % google_auth.user_code
+
+graphics.qrcode(google_auth.verification_url.encode(), qr_size=2, x=240, y=70)
+board.DISPLAY.show(graphics.splash)
+display.refresh()
+
+# Poll Google's authorization server
+print("Waiting for browser authorization...")
+if not google_auth.wait_for_authorization():
+    raise RuntimeError("Timed out waiting for browser response!")
+
+print("Successfully Authenticated with Google!")
+print("Add the following lines to your secrets.py file:")
+print("\t'google_access_token' " + ":" + " '%s'," % google_auth.access_token)
+print("\t'google_refresh_token' " + ":" + " '%s'" % google_auth.refresh_token)
+
+graphics.splash.pop()
+graphics.splash.pop()
+graphics.splash.pop()
+
+label_overview_text.text = "Successfully Authenticated!"
+label_verification_url.text = (
+    "Check the REPL for tokens to add\n\tto your secrets.py file"
+)
+display.refresh()

MagTag_Google_Calendar/code.py

@@ -0,0 +1,248 @@
+# MagTag Google Calendar Event Viewer
+# Brent Rubell for Adafruit Industries, 2021
+import time
+import ssl
+import board
+import rtc
+import wifi
+import socketpool
+import adafruit_requests as requests
+from adafruit_oauth2 import OAuth2
+from adafruit_display_shapes.line import Line
+from adafruit_bitmap_font import bitmap_font
+from adafruit_display_text import label
+from adafruit_magtag.magtag import MagTag
+
+# Calendar ID
+CALENDAR_ID = "[email protected]"
+
+# Maximum amount of events to display
+MAX_EVENTS = 3
+
+# Amount of time to wait between refreshing the calendar, in minutes
+REFRESH_TIME = 15
+
+# Dict. of month names for pretty-printing the header
+MONTHS = {
+    1: "Jan",
+    2: "Feb",
+    3: "Mar",
+    4: "Apr",
+    5: "May",
+    6: "Jun",
+    7: "Jul",
+    8: "Aug",
+    9: "Sep",
+    10: "Oct",
+    11: "Nov",
+    12: "Dec",
+}
+
+# Add a secrets.py to your filesystem that has a dictionary called secrets with "ssid" and
+# "password" keys with your WiFi credentials. DO NOT share that file or commit it into Git or other
+# source control.
+# pylint: disable=no-name-in-module,wrong-import-order
+try:
+    from secrets import secrets
+except ImportError:
+    print("Credentials and tokens are kept in secrets.py, please add them there!")
+    raise
+
+print("Connecting to %s" % secrets["ssid"])
+wifi.radio.connect(secrets["ssid"], secrets["password"])
+print("Connected to %s!" % secrets["ssid"])
+
+pool = socketpool.SocketPool(wifi.radio)
+requests = requests.Session(pool, ssl.create_default_context())
+
+magtag = MagTag()
+r = rtc.RTC()
+
+# Initialize an OAuth2 object with GCal API scope
+scopes = ["https://www.googleapis.com/auth/calendar.readonly"]
+google_auth = OAuth2(
+    requests,
+    secrets["google_client_id"],
+    secrets["google_client_secret"],
+    scopes,
+    secrets["google_access_token"],
+    secrets["google_refresh_token"],
+)
+
+if not google_auth.refresh_access_token():
+    raise RuntimeError("Unable to refresh access token - has the token been revoked?")
+
+def get_current_time(time_max=False):
+    """Gets local time from Adafruit IO and converts to RFC3339 timestamp."""
+    # Get local time from Adafruit IO
+    magtag.get_local_time(secrets["timezone"])
+    # Format as RFC339 timestamp
+    cur_time = r.datetime
+    if time_max:  # maximum time to fetch events is midnight (4:59:59UTC)
+        cur_time_max = time.struct_time(
+            cur_time[0], cur_time[1], cur_time[2] + 1, 4, 59, 59, 0, -1, -1
+        )
+        cur_time = cur_time_max
+    cur_time = "{:04d}-{:02d}-{:02d}T{:02d}:{:02d}:{:02d}{:s}".format(
+        cur_time[0],
+        cur_time[1],
+        cur_time[2],
+        cur_time[3],
+        cur_time[4],
+        cur_time[5],
+        "Z",
+    )
+    return cur_time
+
+
+def get_calendar_events(calendar_id, max_events, time_min):
+    """Returns events on a specified calendar.
+    Response is a list of events ordered by their start date/time in ascending order.
+    """
+    time_max = get_current_time(time_max=True)
+    print("Fetching calendar events from {0} to {1}".format(time_min, time_max))
+
+    headers = {
+        "Authorization": "Bearer " + google_auth.access_token,
+        "Accept": "application/json",
+        "Content-Length": "0",
+    }
+    url = (
+        "https://www.googleapis.com/calendar/v3/calendars/{0}"
+        "/events?maxResults={1}&timeMin={2}&timeMax={3}&orderBy=startTime"
+        "&singleEvents=true".format(calendar_id, max_events, time_min, time_max)
+    )
+    resp = requests.get(url, headers=headers)
+    resp_json = resp.json()
+    if "error" in resp_json:
+        raise RuntimeError("Error:", resp_json)
+    resp.close()
+    # parse the 'items' array so we can iterate over it easier
+    items = []
+    resp_items = resp_json["items"]
+    if not resp_items:
+        print("No events scheduled for today!")
+    for event in range(0, len(resp_items)):
+        items.append(resp_items[event])
+    return items
+
+
+def format_datetime(datetime, pretty_date=False):
+    """Formats ISO-formatted datetime returned by Google Calendar API into
+    a struct_time.
+    :param str datetime: Datetime string returned by Google Calendar API
+    :return: struct_time
+
+    """
+    times = datetime.split("T")
+    the_date = times[0]
+    the_time = times[1]
+    year, month, mday = [int(x) for x in the_date.split("-")]
+    the_time = the_time.split("-")[0]
+    if "Z" in the_time:
+        the_time = the_time.split("Z")[0]
+    hours, minutes, _ = [int(x) for x in the_time.split(":")]
+    am_pm = "am"
+    if hours >= 12:
+        am_pm = "pm"
+        # convert to 12hr time
+        if not hours == 12:
+            hours -= 12
+    # via https://github.com/micropython/micropython/issues/3087
+    formatted_time = "{:02d}:{:02d}{:s}".format(hours, minutes, am_pm)
+    if pretty_date:  # return a nice date for header label
+        formatted_date = "{}. {:02d}, {:04d} ".format(MONTHS[month], mday, year)
+        return formatted_date
+    # Event occurs today, return the time only
+    return formatted_time
+
+
+def display_calendar_events(resp_events):
+    # Display all calendar events
+    for event_idx in range(len(resp_events)):
+        event = resp_events[event_idx]
+        # wrap event name around second line if necessary
+        event_name = magtag.wrap_nicely(event["summary"], 25)
+        event_name = "\n".join(event_name[0:2])  # only wrap 2 lines, truncate third..
+        event_start = event["start"]["dateTime"]
+        print("-" * 40)
+        print("Event Description: ", event_name)
+        print("Event Time:", format_datetime(event_start))
+        print("-" * 40)
+        # Generate labels holding event info
+        label_event_time = label.Label(
+            font_event,
+            x=7,
+            y=35 + (event_idx * 35),
+            color=0x000000,
+            text=format_datetime(event_start),
+        )
+        magtag.splash.append(label_event_time)
+
+        label_event_desc = label.Label(
+            font_event,
+            x=88,
+            y=35 + (event_idx * 35),
+            color=0x000000,
+            text=event_name,
+            line_spacing=0.65,
+        )
+        magtag.splash.append(label_event_desc)
+
+# DisplayIO Setup
+magtag.set_background(0xFFFFFF)
+
+# Add the header
+line_header = Line(0, 25, 320, 25, color=0x000000)
+magtag.splash.append(line_header)
+
+font_h1 = bitmap_font.load_font("fonts/Arial-Bold-18.pcf")
+font_h1.load_glyphs(
+    b"abcdefghjiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-,. "
+)
+label_header = label.Label(
+    font_h1, x=(board.DISPLAY.width // 5) + 1, y=10, color=0x000000, max_glyphs=13
+)
+magtag.splash.append(label_header)
+
+# Set up calendar event fonts
+font_event = bitmap_font.load_font("fonts/Arial-12.pcf")
+font_event.load_glyphs(
+    b"abcdefghjiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-:/ ()"
+)
+
+if not google_auth.refresh_access_token():
+    raise RuntimeError("Unable to refresh access token - has the token been revoked?")
+access_token_obtained = int(time.monotonic())
+
+while True:
+    # check if we need to refresh token
+    if (
+        int(time.monotonic()) - access_token_obtained
+        >= google_auth.access_token_expiration
+    ):
+        print("Access token expired, refreshing...")
+        if not google_auth.refresh_access_token():
+            raise RuntimeError(
+                "Unable to refresh access token - has the token been revoked?"
+            )
+        access_token_obtained = int(time.monotonic())
+
+    # fetch calendar events!
+    print("fetching local time...")
+    now = get_current_time()
+
+    # setup header label
+    label_header.text = format_datetime(now, pretty_date=True)
+
+    print("fetching calendar events...")
+    events = get_calendar_events(CALENDAR_ID, MAX_EVENTS, now)
+
+    print("displaying events")
+    display_calendar_events(events)
+
+    board.DISPLAY.show(magtag.splash)
+    board.DISPLAY.refresh()
+
+    print("Sleeping for %d minutes" % REFRESH_TIME)
+    magtag.exit_and_deep_sleep(REFRESH_TIME * 60)