commit 3b422450ac0a4b1e916e098b38944e2fea7bcbdf
Author: redxef <federanko.manuel@gmail.com>
Date:   Wed Sep 28 15:52:52 2022 +0200

    Initial commit.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bee8a64
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
diff --git a/adapters/__init__.py b/adapters/__init__.py
new file mode 100644
index 0000000..9b2a713
--- /dev/null
+++ b/adapters/__init__.py
@@ -0,0 +1,11 @@
+
+
+from .google import Google
+from .wordpress import Wordpress
+from .wordpress import CalendarMetadata
+
+__all__ = [
+    'Google',
+    'Wordpress',
+    'CalendarMetadata',
+]
diff --git a/adapters/google.py b/adapters/google.py
new file mode 100644
index 0000000..170d221
--- /dev/null
+++ b/adapters/google.py
@@ -0,0 +1,63 @@
+import tempfile
+import datetime
+import os.path
+
+import json
+from google.auth.transport.requests import Request
+from google.oauth2.credentials import Credentials
+from google_auth_oauthlib.flow import InstalledAppFlow
+from googleapiclient.discovery import build
+from googleapiclient.errors import HttpError
+
+# If modifying these scopes, delete the file token.json.
+SCOPES = ['https://www.googleapis.com/auth/calendar']
+
+
+class Google():
+
+    def __init__(self, calendar_id, *, credentials, token_file):
+        _, credentials_file = tempfile.mkstemp()
+        with open(credentials_file, 'w') as fp:
+            json.dump(credentials, fp)
+
+        self.calendar_id = calendar_id
+        self.credentials_file = credentials_file
+        self.token_file = token_file
+        self.credentials = None
+
+    def login(self):
+        if os.path.exists(self.token_file):
+            self.credentials = Credentials.from_authorized_user_file(self.token_file, SCOPES)
+        if self.credentials is None or not self.credentials.valid:
+            if self.credentials is not None \
+                    and self.credentials.expired \
+                    and  self.credentials.refresh_token:
+                self.credentials.refresh(Request())
+            else:
+                flow = InstalledAppFlow.from_client_secrets_file(
+                    self.credentials_file,
+                    SCOPES,
+                )
+                self.credentials = flow.run_local_server(port=0)
+            with open(self.token_file, 'w') as token:
+                token.write(self.credentials.to_json())
+
+    def get_events(self, start: datetime.datetime | None=None, until: datetime.timedelta | None=None, limit=None):
+        until = until if until else datetime.timedelta(days=365)
+        now = start if start else datetime.datetime.utcnow().astimezone()
+        now_365 = now + until
+
+        try:
+            service = build('calendar', 'v3', credentials=self.credentials)
+            events = service.events().list(
+                calendarId=self.calendar_id,
+                timeMin=now.isoformat(),
+                timeMax=now_365.isoformat(),
+                maxResults=limit,
+            ).execute()
+        except HttpError:
+            print('an error occured')
+            raise
+        events = events.get('items', [])
+        return events
+
diff --git a/adapters/utils.py b/adapters/utils.py
new file mode 100644
index 0000000..f44eac2
--- /dev/null
+++ b/adapters/utils.py
@@ -0,0 +1,9 @@
+import collections
+
+
+def dict_merge(dct, merge_dct):
+    for k, v in merge_dct.items():
+        if (k in dct and isinstance(dct[k], dict) and isinstance(merge_dct[k], dict)):  #noqa
+            dict_merge(dct[k], merge_dct[k])
+        else:
+            dct[k] = merge_dct[k]
diff --git a/adapters/wordpress.py b/adapters/wordpress.py
new file mode 100644
index 0000000..3d0e2f5
--- /dev/null
+++ b/adapters/wordpress.py
@@ -0,0 +1,144 @@
+import requests
+import urllib.parse
+import json
+import datetime
+
+from . import utils
+
+
+
+class CalendarMetadata():
+
+    def __init__(
+        self,
+        name: str,
+        id: int,
+        translations: dict,
+    ):
+        self.name = name
+        self.id = id
+        self.translations = translations
+
+    def to_dict(self):
+        translations = {
+            f'calendar_name_translation_{k}': v for k, v in self.translations.items()
+        }
+        return {
+            'calendar_name': self.name,
+            'calendar_id': self.id,
+            **translations,
+        }
+
+class Wordpress():
+
+    def __init__(
+        self,
+        base_url: str,
+        *,
+        calendar_metadata: CalendarMetadata,
+        credentials: dict,
+    ):
+        self.base_url = base_url
+        self.session = requests.Session()
+        self.credentials = credentials
+        self.calendar_meadata = calendar_metadata
+
+    def login(self):
+        login_request = self.session.post(
+            f'{self.base_url}/wp-login.php',
+            data={
+                'log': self.credentials['user'],
+                'pwd': self.credentials['password'],
+                'wp-submit': 'Anmelden',
+                'redirect_to': f'{self.base_url}/wp-admin/',
+                'testcookie': 1,
+            }
+        )
+        return login_request
+
+    def _datestr_to_date(self, s, tz=None):
+        if s.endswith('Z'):
+            s = s[:-1]
+        return datetime.datetime.fromisoformat(s).astimezone().date()
+
+    def _generate_data_single(self, event, item_id=2):
+        start = event['start']
+        end = event['end']
+        summary = event['summary']
+
+        day_increment = datetime.timedelta(days=1)
+
+        if 'date' in start:
+            start = self._datestr_to_date(start['date'])
+        elif 'dateTime' in start:
+            start = self._datestr_to_date(start['dateTime'], tz=start['timeZone'])
+        else:
+            raise ValueError('Cannot process event')
+
+        if 'date' in end:
+            end = self._datestr_to_date(end['date'])
+        elif 'dateTime' in end:
+            end = self._datestr_to_date(end['dateTime'], tz=end['timeZone'])
+            end += day_increment # if its a time on a day, we want to add one, in order to also include it in the update
+        else:
+            raise ValueError('Cannot process event')
+
+        flow = start
+        dictionary = {}
+        while flow < end:
+            dictionary.setdefault(flow.year, {})
+            dictionary[flow.year].setdefault(flow.month, {})
+            dictionary[flow.year][flow.month].setdefault(flow.day, {})
+            dictionary[flow.year][flow.month][flow.day] = {
+                    'description': summary,
+                    'legend_item_id': item_id,
+            }
+            flow += day_increment
+        return dictionary
+
+    def _fill_empty(self, d, *, start: datetime.datetime, until: datetime.timedelta):
+        day_increment = datetime.timedelta(days=1)
+        flow = start
+        while flow < start + until:
+            d.setdefault(flow.year, {})
+            d[flow.year].setdefault(flow.month, {})
+            d[flow.year][flow.month].setdefault(flow.day, {})
+            d[flow.year][flow.month][flow.day].setdefault('legend_item_id', 1)
+            d[flow.year][flow.month][flow.day].setdefault('description', '')
+            flow += day_increment
+        return d
+
+    def _generate_data(
+            self,
+            events,
+            start: datetime.datetime | None=None,
+            until: datetime.timedelta | None=None
+    ):
+        until = until if until else datetime.timedelta(days=365)
+        start = start if start else datetime.datetime.utcnow().astimezone()
+
+        final_dict = {}
+        for event in events:
+            data = self._generate_data_single(event)
+            utils.dict_merge(final_dict, data)
+        final_dict = self._fill_empty(
+            final_dict,
+            start=start,
+            until=until,
+        )
+        return final_dict
+
+    def post_events(self, events):
+        metadata = self.calendar_meadata.to_dict()
+        data = self._generate_data(events)
+        update_request = self.session.post(
+            f'{self.base_url}/wp-admin/admin-ajax.php',
+            auth=(self.credentials['user'], self.credentials['password']),
+            data={
+                'action': 'wpbs_save_calendar_data',
+                'form_data': urllib.parse.urlencode(metadata),
+                'calendar_data': json.dumps(data),
+            },
+        )
+        return update_request
+
diff --git a/main.py b/main.py
new file mode 100755
index 0000000..7a90b1a
--- /dev/null
+++ b/main.py
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+#!/usr/bin/env python3
+
+import sys
+import yaml
+try:
+    from yaml import CLoader as Loader
+except ImportError:
+    from yaml import Loader
+
+from adapters import *
+
+class Config():
+
+    """
+    The default configuration.
+
+
+    Keys:
+    .google.calendar_id: the id of the calendar to sync
+    .google.credentials: the json of the obtained credentials file
+    .google.token_file: where to save the login token
+    .wordpress.url: the base wordpress url
+    .wordpress.calendar.id: the id of the (wp-booking-system) calendar
+    .wordpress.calendar.name: the name of the calendar
+    .wordpress.calendar.translations: a dictionary of language <-> translation pairs (example: {"en": "Reservations"})
+    .wordpress.credentials.user: the user as which to log into wordpress
+    .wordpress.credentials.password: the users password
+    """
+
+    def __init__(self, file):
+        self.file = file
+        self.config: dict | None = None
+
+    def load(self):
+        if self.file == '-':
+            config = yaml.load(sys.stdin, Loader=Loader)
+        else:
+            with open(self.file) as fp:
+                config = yaml.load(fp, Loader=Loader)
+        self.config = config
+
+    def __getitem__(self, name):
+        assert self.config is not None
+        return self.config[name]
+
+if __name__ == '__main__':
+    config = Config('-')
+    config.load()
+    g = Google(
+        config['google']['calendar_id'],
+        credentials=config['google']['credentials'],
+        token_file=config['google'].get('token_file', '~/.wp-cal-integration-google-token.json')
+    )
+    w = Wordpress(
+        config['wordpress']['url'],
+        calendar_metadata=CalendarMetadata(
+            id=config['wordpress']['calendar']['id'],
+            name=config['wordpress']['calendar']['name'],
+            translations=config['wordpress']['calendar']['translations'],
+        ),
+        credentials=config['wordpress']['credentials'],
+    )
+    g.login()
+    events = g.get_events()
+    w.login()
+    w.post_events(events)