Standardize Plex server connections (#26444)

* Common connection class

* Omit tests for new Plex files

* Oops

* Add missing properties

* Remove redundant log message

* Stopgap to avoid duplicate setups

* Cleaner check for server setup

Co-Authored-By: Martin Hjelmare <marhje52@kth.se>

* Cleaner check for server setup

Co-Authored-By: Martin Hjelmare <marhje52@kth.se>

* Not needed with previous setup check

* Remove username/password support

* Reduce log level

Co-Authored-By: Martin Hjelmare <marhje52@kth.se>

* Don't do setup in __init__

* Oops

* Committing too fast...

* Connect after init

* Catch update exceptions like media_player

* Pass in validated PlexServer instance

* Remove unnecessary check

* Counter should be unknown on init

* Remove servername config option

homeassistant/components/plex/server.py

@@ -0,0 +1,59 @@
+"""Shared class to maintain Plex server instances."""
+import logging
+import plexapi.server
+from requests import Session
+
+from homeassistant.const import CONF_TOKEN, CONF_URL, CONF_VERIFY_SSL
+
+from .const import DEFAULT_VERIFY_SSL
+
+_LOGGER = logging.getLogger(__package__)
+
+
+class PlexServer:
+    """Manages a single Plex server connection."""
+
+    def __init__(self, server_config):
+        """Initialize a Plex server instance."""
+        self._plex_server = None
+        self._url = server_config.get(CONF_URL)
+        self._token = server_config.get(CONF_TOKEN)
+        self._verify_ssl = server_config.get(CONF_VERIFY_SSL, DEFAULT_VERIFY_SSL)
+
+    def connect(self):
+        """Connect to a Plex server directly, obtaining direct URL if necessary."""
+
+        def _connect_with_url():
+            session = None
+            if self._url.startswith("https") and not self._verify_ssl:
+                session = Session()
+                session.verify = False
+            self._plex_server = plexapi.server.PlexServer(
+                self._url, self._token, session
+            )
+            _LOGGER.debug("Connected to: %s (%s)", self.friendly_name, self.url_in_use)
+
+        _connect_with_url()
+
+    def clients(self):
+        """Pass through clients call to plexapi."""
+        return self._plex_server.clients()
+
+    def sessions(self):
+        """Pass through sessions call to plexapi."""
+        return self._plex_server.sessions()
+
+    @property
+    def friendly_name(self):
+        """Return name of connected Plex server."""
+        return self._plex_server.friendlyName
+
+    @property
+    def machine_identifier(self):
+        """Return unique identifier of connected Plex server."""
+        return self._plex_server.machineIdentifier
+
+    @property
+    def url_in_use(self):
+        """Return URL used for connected Plex server."""
+        return self._plex_server._baseurl  # pylint: disable=W0212