157 lines
6.5 KiB
Python
157 lines
6.5 KiB
Python
from typing import Optional
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from platypush.backend import Backend
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from platypush.context import get_plugin
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from platypush.message.event.nextcloud import NextCloudActivityEvent
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from platypush.plugins.nextcloud import NextcloudPlugin
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from platypush.plugins.variable import VariablePlugin
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class NextcloudBackend(Backend):
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"""
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This backend triggers events when new activities occur on a NextCloud instance.
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Triggers:
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- :class:`platypush.message.event.nextcloud.NextCloudActivityEvent` when new activity occurs on the instance.
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The field ``activity_type`` identifies the activity type (e.g. ``file_created``, ``file_deleted``,
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``file_changed``). Example in the case of the creation of new files:
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.. code-block:: json
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{
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"activity_id": 387,
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"app": "files",
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"activity_type": "file_created",
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"user": "your-user",
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"subject": "You created InstantUpload/Camera/IMG_0100.jpg, InstantUpload/Camera/IMG_0101.jpg and InstantUpload/Camera/IMG_0102.jpg",
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"subject_rich": [
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"You created {file3}, {file2} and {file1}",
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{
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"file1": {
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"type": "file",
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"id": "41994",
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"name": "IMG_0100.jpg",
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"path": "InstantUpload/Camera/IMG_0100.jpg",
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"link": "https://your-domain/nextcloud/index.php/f/41994"
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},
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"file2": {
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"type": "file",
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"id": "42005",
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"name": "IMG_0101.jpg",
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"path": "InstantUpload/Camera/IMG_0102.jpg",
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"link": "https://your-domain/nextcloud/index.php/f/42005"
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},
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"file3": {
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"type": "file",
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"id": "42014",
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"name": "IMG_0102.jpg",
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"path": "InstantUpload/Camera/IMG_0102.jpg",
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"link": "https://your-domain/nextcloud/index.php/f/42014"
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}
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}
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],
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"message": "",
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"message_rich": [
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"",
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[]
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],
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"object_type": "files",
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"object_id": 41994,
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"object_name": "/InstantUpload/Camera/IMG_0102.jpg",
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"objects": {
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"42014": "/InstantUpload/Camera/IMG_0100.jpg",
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"42005": "/InstantUpload/Camera/IMG_0101.jpg",
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"41994": "/InstantUpload/Camera/IMG_0102.jpg"
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},
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"link": "https://your-domain/nextcloud/index.php/apps/files/?dir=/InstantUpload/Camera",
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"icon": "https://your-domain/nextcloud/apps/files/img/add-color.svg",
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"datetime": "2020-09-07T17:04:29+00:00"
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}
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"""
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_LAST_ACTIVITY_VARNAME = '_NEXTCLOUD_LAST_ACTIVITY_ID'
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def __init__(self, url: Optional[str] = None, username: Optional[str] = None, password: Optional[str] = None,
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object_type: Optional[str] = None, object_id: Optional[int] = None,
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poll_seconds: Optional[float] = 60., **kwargs):
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"""
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:param url: NextCloud instance URL (default: same as the :class:`platypush.plugins.nextcloud.NextCloudPlugin`).
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:param username: NextCloud username (default: same as the :class:`platypush.plugins.nextcloud.NextCloudPlugin`).
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:param password: NextCloud password (default: same as the :class:`platypush.plugins.nextcloud.NextCloudPlugin`).
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:param object_type: If set, only filter events on this type of object.
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:param object_id: If set, only filter events on this object ID.
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:param poll_seconds: How often the backend should poll the instance (default: one minute).
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"""
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super().__init__(**kwargs)
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self.url: Optional[str] = None
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self.username: Optional[str] = None
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self.password: Optional[str] = None
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self.object_type = object_type
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self.object_id = object_id
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self.poll_seconds = poll_seconds
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self._last_seen_id = None
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try:
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plugin: Optional[NextcloudPlugin] = get_plugin('nextcloud')
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if plugin:
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self.url = plugin.conf.url
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self.username = plugin.conf.username
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self.password = plugin.conf.password
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except Exception as e:
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self.logger.info('NextCloud plugin not configured: {}'.format(str(e)))
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self.url = url if url else self.url
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self.username = username if username else self.username
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self.password = password if password else self.password
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assert self.url and self.username and self.password, \
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'No configuration provided neither for the NextCloud plugin nor the backend'
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@property
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def last_seen_id(self) -> Optional[int]:
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if self._last_seen_id is None:
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variables: VariablePlugin = get_plugin('variable')
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last_seen_id = variables.get(self._LAST_ACTIVITY_VARNAME).output.get(self._LAST_ACTIVITY_VARNAME)
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self._last_seen_id = last_seen_id
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return self._last_seen_id
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@last_seen_id.setter
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def last_seen_id(self, value: Optional[int]):
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variables: VariablePlugin = get_plugin('variable')
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variables.set(**{self._LAST_ACTIVITY_VARNAME: value})
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self._last_seen_id = value
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@staticmethod
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def _activity_to_event(activity: dict) -> NextCloudActivityEvent:
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return NextCloudActivityEvent(activity_type=activity.pop('type'), **activity)
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def loop(self):
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last_seen_id = int(self.last_seen_id)
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new_last_seen_id = int(last_seen_id)
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plugin: NextcloudPlugin = get_plugin('nextcloud')
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# noinspection PyUnresolvedReferences
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activities = plugin.get_activities(sort='desc', url=self.url, username=self.username, password=self.password,
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object_type=self.object_type, object_id=self.object_id).output
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events = []
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for activity in activities:
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if last_seen_id and activity['activity_id'] <= last_seen_id:
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break
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events.append(self._activity_to_event(activity))
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if not new_last_seen_id or activity['activity_id'] > new_last_seen_id:
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new_last_seen_id = int(activity['activity_id'])
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for evt in events[::-1]:
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self.bus.post(evt)
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if new_last_seen_id and last_seen_id != new_last_seen_id:
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self.last_seen_id = new_last_seen_id
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# vim:sw=4:ts=4:et:
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