#
# Aura Engine API (https://gitlab.servus.at/aura/engine-api)
#
# Copyright (C) 2020 - The Aura Engine Team.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import datetime
import requests
from dateutil.parser import parse
from base.node import NodeType
from models import PlayLog, PlayLogSchema, TrackSchema, ActivityLog, HealthHistory, HealthHistorySchema
class ApiService():
"""
Service handling for API actions.
"""
config = None
logger = None
node_type = None
sync_host = None
main_hosts = None
active_source = None
api_playlog = None
api_healthlog = None
def __init__(self, config, logger, node_type):
"""
Initialize Service.
"""
self.config = config
self.logger = logger
# Configured as Sync Node
if not node_type == NodeType.MAIN:
self.node_type = NodeType.SYNC
self.main_hosts = [ config.get("main_host_1"), config.get("main_host_2") ]
if not self.main_hosts[0] and not self.main_hosts[1]:
self.logger.warn("Not a single main host defined. Be aware what you are doing.")
msg = "No sync possible as no host nodes are configured"
else:
msg = "Syncing data of hosts '%s'" % (self.main_hosts)
# Configured as Main Node
else:
self.node_type = NodeType.MAIN
self.sync_host = config.get("sync_host")
if not self.sync_host:
msg = "No child node for synchronization defined"
else:
msg = "Pushing data to '%s'" % (self.sync_host)
# Set active source
source = ActivityLog.get_active_source()
if source: self.active_source = source.source_number
if not self.active_source:
if self.node_type == NodeType.MAIN:
source_number = self.config.get("host_id")
else:
source_number = self.config.get("default_source")
self.set_default_source(source_number)
self.logger.info("Active source: %s" % self.active_source)
# Init Sync API endpoints
self.api_playlog = self.config.get("sync_api_store_playlog")
self.api_healthlog = self.config.get("sync_api_store_healthlog")
self.logger.info("Running in '%s' mode. %s." % (self.node_type, msg))
def current_track(self):
"""
Retrieves the currently playing track.
Returns:
(JSON)
"""
track = PlayLog.select_current()
track_schema = TrackSchema()
return track_schema.dump(track)
def list_tracks(self, page=None, size=None):
"""
Lists track-service entries with pagination.
Args:
page (Integer): The number of the page to return
size (Integer): The numbers of items to return
Returns:
(JSON)
"""
if not size or size > 50 or size < 1: size = 20
tracklist = PlayLog.paginate(page, size, None, None, False)
tracklist_schema = TrackSchema(many=True)
return tracklist_schema.dump(tracklist)
def list_playlog(self, page=None, size=None, from_time=None, to_time=None, skip_synced=False):
"""
Get paginated playlog entries for since the given timestamp.
Args:
page (Integer): The number of items to skip before starting to collect the result set
size (Integer): The numbers of items to return per page
from_time (datetime): Optionally, get entries after this timestamp (e.g. "2020-08-29T09:12:33.001Z")
from_time (datetime): Optionally, get entries before this timestamp (e.g. "2020-08-29T09:12:33.001Z")
skip_synced (Boolean): Optionally, don't return entries which have been posted directly before (sync node only)
Returns:
(JSON)
"""
tracklist = PlayLog.paginate(page, size, from_time, to_time, skip_synced)
tracklist_schema = PlayLogSchema(many=True)
return tracklist_schema.dump(tracklist)
def store_playlog(self, data):
"""
Stores the passed playlog entry.
Args:
data (Object): The data to store in the playlog
"""
if not data.log_source:
data.log_source = self.config.get("host_id")
# Main Node: Alway log entry, independed of the source
# Sync Node: Only log entry when it's coming from an active source
if self.node_type == NodeType.MAIN or \
(self.node_type == NodeType.SYNC and data.log_source == self.active_source):
try:
playlog = PlayLog(data)
playlog.save()
self.logger.debug("Stored playlog for '%s'" % playlog.track_start)
except sqlalchemy.exc.IntegrityError as e:
self.logger.info("Playlog for '%s' is already existing in local database. Skipping..." % playlog.track_start)
# Main Node: Push to Sync Node, if enabled
if self.node_type == NodeType.MAIN and self.sync_host and self.api_playlog:
playlog_schema = PlayLogSchema()
json_playlog = playlog_schema.dump(playlog)
try:
api_url = self.sync_host + self.api_playlog
r = requests.post(api_url, json=json_playlog)
if r.status_code == 204:
self.logger.info("Successfully pushed playlog for '%s' to '%s'" % (playlog.track_start, self.sync_host))
playlog.is_synced = True
playlog.save()
else:
self.logger.error("Error while pushing playlog to sync-node: " + str(r.json()))
except Exception as e:
self.logger.error("Error while posting to sync-node API '%s'!\n%s" % (api_url, str(e)))
else:
self.logger.info("Ditching playlog sent from an inactive source")
def clock_info(self):
"""
Retrieves the dataset required to render the studio clock.
"""
return "studio clock data"
def set_default_source(self, source_number):
"""
Create initial source (API Epoch) in the ActivityLog being able to sync old entries upon first start
Args:
source_number (Integer): Number of the default engine
"""
if ActivityLog.is_empty():
default_source = self.config.get("default_source")
epoch_source = ActivityLog(default_source)
epoch_source.log_time = parse("2020-02-22 02:20:20")
epoch_source.save()
self.logger.info("Created API epoch source %s:%s" % (epoch_source.source_number, epoch_source.log_time))
else:
self.set_active_source(source_number)
def set_active_source(self, source_number):
"""
Sets the active source (engine1, engine2, other) identified by its source number.
Args:
source_number (Integer): Number of the engine
"""
if source_number > 0:
if self.active_source != source_number:
self.active_source = source_number
activity_log = ActivityLog(source_number)
activity_log.save()
def get_active_source(self):
"""
Retrieves number of the currently active source (engine1, engine2, other)
Returns:
(Integer)
"""
return self.active_source
def get_source_health(self, source_number):
"""
Retrieves the most recent health info of the requested source
Args:
source_number (Integer): Number of the play-out source
Returns:
(JSON)
"""
health = HealthHistory.get_latest_entry(source_number)
health_schema = HealthHistorySchema()
return health_schema.dump(health)
def log_source_health(self, source_number, data):
"""
Logs an health entry for the given source
Args:
source_number (Integer): Number of the play-out source
data (Object): The data to store in the health log
"""
if not data.log_source:
data.log_source = self.host_id
# Main Node: Alway log entry, independed of the source
# Sync Node: Only log entry when it's coming from an active source
if self.node_type == NodeType.MAIN or \
(self.node_type == NodeType.SYNC and data.log_source == self.active_source):
healthlog = HealthHistory(data.log_source, data.is_healthy, data.health_info)
healthlog.save()
self.logger.debug("Stored health info for '%s'" % healthlog.log_source)
# Main Node: Push to Sync Node, if enabled
if self.node_type == NodeType.MAIN and self.sync_host and self.api_healthlog:
health_schema = HealthHistorySchema()
json_healthlog = health_schema.dump(healthlog)
try:
api_url = self.sync_host + api_healthlog + "/" + data.log_source
r = requests.post(api_url, json=json_healthlog)
if r.status_code == 200:
self.logger.info("Successfully pushed healthlog for source '%s' to '%s'" % (healthlog.log_source, self.sync_host))
playlog.is_synced = True
playlog.save()
else:
self.logger.error("Error while pushing healthlog to sync-node: " + str(r.json()))
except Exception as e:
self.logger.error("Error while posting to sync-node API '%s'!" % (api_url), e)
else:
self.logger.info("Ditching healthlog sent from an inactive source")