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bazarr/libs/apprise/Apprise.py
Louis Vézina 78e43f3e69 Fix for #462
2019-06-07 07:16:07 -04:00

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# -*- coding: utf-8 -*-
#
# Copyright (C) 2019 Chris Caron <lead2gold@gmail.com>
# All rights reserved.
#
# This code is licensed under the MIT License.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import re
import os
import six
from markdown import markdown
from itertools import chain
from .common import NotifyType
from .common import NotifyFormat
from .utils import is_exclusive_match
from .utils import parse_list
from .utils import split_urls
from .utils import GET_SCHEMA_RE
from .logger import logger
from .AppriseAsset import AppriseAsset
from .AppriseConfig import AppriseConfig
from .AppriseLocale import AppriseLocale
from .config.ConfigBase import ConfigBase
from .plugins.NotifyBase import NotifyBase
from . import plugins
from . import __version__
class Apprise(object):
"""
Our Notification Manager
"""
def __init__(self, servers=None, asset=None):
"""
Loads a set of server urls while applying the Asset() module to each
if specified.
If no asset is provided, then the default asset is used.
"""
# Initialize a server list of URLs
self.servers = list()
# Assigns an central asset object that will be later passed into each
# notification plugin. Assets contain information such as the local
# directory images can be found in. It can also identify remote
# URL paths that contain the images you want to present to the end
# user. If no asset is specified, then the default one is used.
self.asset = \
asset if isinstance(asset, AppriseAsset) else AppriseAsset()
if servers:
self.add(servers)
# Initialize our locale object
self.locale = AppriseLocale()
@staticmethod
def instantiate(url, asset=None, tag=None, suppress_exceptions=True):
"""
Returns the instance of a instantiated plugin based on the provided
Server URL. If the url fails to be parsed, then None is returned.
The specified url can be either a string (the URL itself) or a
dictionary containing all of the components needed to istantiate
the notification service. If identifying a dictionary, at the bare
minimum, one must specify the schema.
An example of a url dictionary object might look like:
{
schema: 'mailto',
host: 'google.com',
user: 'myuser',
password: 'mypassword',
}
Alternatively the string is much easier to specify:
mailto://user:mypassword@google.com
The dictionary works well for people who are calling details() to
extract the components they need to build the URL manually.
"""
# Initialize our result set
results = None
if isinstance(url, six.string_types):
# swap hash (#) tag values with their html version
_url = url.replace('/#', '/%23')
# Attempt to acquire the schema at the very least to allow our
# plugins to determine if they can make a better interpretation of
# a URL geared for them
schema = GET_SCHEMA_RE.match(_url)
if schema is None:
logger.error(
'Unparseable schema:// found in URL {}.'.format(url))
return None
# Ensure our schema is always in lower case
schema = schema.group('schema').lower()
# Some basic validation
if schema not in plugins.SCHEMA_MAP:
# Give the user the benefit of the doubt that the user may be
# using one of the URLs provided to them by their notification
# service. Before we fail for good, just scan all the plugins
# that support he native_url() parse function
results = \
next((r['plugin'].parse_native_url(_url)
for r in plugins.MODULE_MAP.values()
if r['plugin'].parse_native_url(_url) is not None),
None)
else:
# Parse our url details of the server object as dictionary
# containing all of the information parsed from our URL
results = plugins.SCHEMA_MAP[schema].parse_url(_url)
if results is None:
# Failed to parse the server URL
logger.error('Unparseable URL {}.'.format(url))
return None
logger.trace('URL {} unpacked as:{}{}'.format(
url, os.linesep, os.linesep.join(
['{}="{}"'.format(k, v) for k, v in results.items()])))
elif isinstance(url, dict):
# We already have our result set
results = url
if results.get('schema') not in plugins.SCHEMA_MAP:
# schema is a mandatory dictionary item as it is the only way
# we can index into our loaded plugins
logger.error('Dictionary does not include a "schema" entry.')
logger.trace('Invalid dictionary unpacked as:{}{}'.format(
os.linesep, os.linesep.join(
['{}="{}"'.format(k, v) for k, v in results.items()])))
return None
logger.trace('Dictionary unpacked as:{}{}'.format(
os.linesep, os.linesep.join(
['{}="{}"'.format(k, v) for k, v in results.items()])))
else:
logger.error('Invalid URL specified: {}'.format(url))
return None
# Build a list of tags to associate with the newly added notifications
results['tag'] = set(parse_list(tag))
# Prepare our Asset Object
results['asset'] = \
asset if isinstance(asset, AppriseAsset) else AppriseAsset()
if suppress_exceptions:
try:
# Attempt to create an instance of our plugin using the parsed
# URL information
plugin = plugins.SCHEMA_MAP[results['schema']](**results)
# Create log entry of loaded URL
logger.debug('Loaded URL: {}'.format(plugin.url()))
except Exception:
# the arguments are invalid or can not be used.
logger.error('Could not load URL: %s' % url)
return None
else:
# Attempt to create an instance of our plugin using the parsed
# URL information but don't wrap it in a try catch
plugin = plugins.SCHEMA_MAP[results['schema']](**results)
return plugin
def add(self, servers, asset=None, tag=None):
"""
Adds one or more server URLs into our list.
You can override the global asset if you wish by including it with the
server(s) that you add.
The tag allows you to associate 1 or more tag values to the server(s)
being added. tagging a service allows you to exclusively access them
when calling the notify() function.
"""
# Initialize our return status
return_status = True
if isinstance(asset, AppriseAsset):
# prepare default asset
asset = self.asset
if isinstance(servers, six.string_types):
# build our server list
servers = split_urls(servers)
if len(servers) == 0:
return False
elif isinstance(servers, dict):
# no problem, we support kwargs, convert it to a list
servers = [servers]
elif isinstance(servers, (ConfigBase, NotifyBase, AppriseConfig)):
# Go ahead and just add our plugin into our list
self.servers.append(servers)
return True
elif not isinstance(servers, (tuple, set, list)):
logger.error(
"An invalid notification (type={}) was specified.".format(
type(servers)))
return False
for _server in servers:
if isinstance(_server, (ConfigBase, NotifyBase, AppriseConfig)):
# Go ahead and just add our plugin into our list
self.servers.append(_server)
continue
elif not isinstance(_server, (six.string_types, dict)):
logger.error(
"An invalid notification (type={}) was specified.".format(
type(_server)))
return_status = False
continue
# Instantiate ourselves an object, this function throws or
# returns None if it fails
instance = Apprise.instantiate(_server, asset=asset, tag=tag)
if not isinstance(instance, NotifyBase):
# No logging is requird as instantiate() handles failure
# and/or success reasons for us
return_status = False
continue
# Add our initialized plugin to our server listings
self.servers.append(instance)
# Return our status
return return_status
def clear(self):
"""
Empties our server list
"""
self.servers[:] = []
def notify(self, body, title='', notify_type=NotifyType.INFO,
body_format=None, tag=None):
"""
Send a notification to all of the plugins previously loaded.
If the body_format specified is NotifyFormat.MARKDOWN, it will
be converted to HTML if the Notification type expects this.
if the tag is specified (either a string or a set/list/tuple
of strings), then only the notifications flagged with that
tagged value are notified. By default all added services
are notified (tag=None)
"""
# Initialize our return result
status = len(self) > 0
if not (title or body):
return False
# Tracks conversions
conversion_map = dict()
# Build our tag setup
# - top level entries are treated as an 'or'
# - second level (or more) entries are treated as 'and'
#
# examples:
# tag="tagA, tagB" = tagA or tagB
# tag=['tagA', 'tagB'] = tagA or tagB
# tag=[('tagA', 'tagC'), 'tagB'] = (tagA and tagC) or tagB
# tag=[('tagB', 'tagC')] = tagB and tagC
# Iterate over our loaded plugins
for entry in self.servers:
if isinstance(entry, (ConfigBase, AppriseConfig)):
# load our servers
servers = entry.servers()
else:
servers = [entry, ]
for server in servers:
# Apply our tag matching based on our defined logic
if tag is not None and not is_exclusive_match(
logic=tag, data=server.tags):
continue
# If our code reaches here, we either did not define a tag (it
# was set to None), or we did define a tag and the logic above
# determined we need to notify the service it's associated with
if server.notify_format not in conversion_map:
if body_format == NotifyFormat.MARKDOWN and \
server.notify_format == NotifyFormat.HTML:
# Apply Markdown
conversion_map[server.notify_format] = markdown(body)
elif body_format == NotifyFormat.TEXT and \
server.notify_format == NotifyFormat.HTML:
# Basic TEXT to HTML format map; supports keys only
re_map = {
# Support Ampersand
r'&': '&amp;',
# Spaces to &nbsp; for formatting purposes since
# multiple spaces are treated as one an this may
# not be the callers intention
r' ': '&nbsp;',
# Tab support
r'\t': '&nbsp;&nbsp;&nbsp;',
# Greater than and Less than Characters
r'>': '&gt;',
r'<': '&lt;',
}
# Compile our map
re_table = re.compile(
r'(' + '|'.join(
map(re.escape, re_map.keys())) + r')',
re.IGNORECASE,
)
# Execute our map against our body in addition to
# swapping out new lines and replacing them with <br/>
conversion_map[server.notify_format] = \
re.sub(r'\r*\n', '<br/>\r\n',
re_table.sub(
lambda x: re_map[x.group()], body))
else:
# Store entry directly
conversion_map[server.notify_format] = body
try:
# Send notification
if not server.notify(
body=conversion_map[server.notify_format],
title=title,
notify_type=notify_type):
# Toggle our return status flag
status = False
except TypeError:
# These our our internally thrown notifications
status = False
except Exception:
# A catch all so we don't have to abort early
# just because one of our plugins has a bug in it.
logger.exception("Notification Exception")
status = False
return status
def details(self, lang=None):
"""
Returns the details associated with the Apprise object
"""
# general object returned
response = {
# Defines the current version of Apprise
'version': __version__,
# Lists all of the currently supported Notifications
'schemas': [],
# Includes the configured asset details
'asset': self.asset.details(),
}
# to add it's mapping to our hash table
for plugin in set(plugins.SCHEMA_MAP.values()):
# Standard protocol(s) should be None or a tuple
protocols = getattr(plugin, 'protocol', None)
if isinstance(protocols, six.string_types):
protocols = (protocols, )
# Secure protocol(s) should be None or a tuple
secure_protocols = getattr(plugin, 'secure_protocol', None)
if isinstance(secure_protocols, six.string_types):
secure_protocols = (secure_protocols, )
if not lang:
# Simply return our results
details = plugins.details(plugin)
else:
# Emulate the specified language when returning our results
with self.locale.lang_at(lang):
details = plugins.details(plugin)
# Build our response object
response['schemas'].append({
'service_name': getattr(plugin, 'service_name', None),
'service_url': getattr(plugin, 'service_url', None),
'setup_url': getattr(plugin, 'setup_url', None),
'protocols': protocols,
'secure_protocols': secure_protocols,
'details': details,
})
return response
def urls(self):
"""
Returns all of the loaded URLs defined in this apprise object.
"""
return [x.url() for x in self.servers]
def pop(self, index):
"""
Removes an indexed Notification Service from the stack and returns it.
The thing is we can never pop AppriseConfig() entries, only what was
loaded within them. So pop needs to carefully iterate over our list
and only track actual entries.
"""
# Tracking variables
prev_offset = -1
offset = prev_offset
for idx, s in enumerate(self.servers):
if isinstance(s, (ConfigBase, AppriseConfig)):
servers = s.servers()
if len(servers) > 0:
# Acquire a new maximum offset to work with
offset = prev_offset + len(servers)
if offset >= index:
# we can pop an element from our config stack
fn = s.pop if isinstance(s, ConfigBase) \
else s.server_pop
return fn(index if prev_offset == -1
else (index - prev_offset - 1))
else:
offset = prev_offset + 1
if offset == index:
return self.servers.pop(idx)
# Update our old offset
prev_offset = offset
# If we reach here, then we indexed out of range
raise IndexError('list index out of range')
def __getitem__(self, index):
"""
Returns the indexed server entry of a loaded notification server
"""
# Tracking variables
prev_offset = -1
offset = prev_offset
for idx, s in enumerate(self.servers):
if isinstance(s, (ConfigBase, AppriseConfig)):
# Get our list of servers associate with our config object
servers = s.servers()
if len(servers) > 0:
# Acquire a new maximum offset to work with
offset = prev_offset + len(servers)
if offset >= index:
return servers[index if prev_offset == -1
else (index - prev_offset - 1)]
else:
offset = prev_offset + 1
if offset == index:
return self.servers[idx]
# Update our old offset
prev_offset = offset
# If we reach here, then we indexed out of range
raise IndexError('list index out of range')
def __iter__(self):
"""
Returns an iterator to each of our servers loaded. This includes those
found inside configuration.
"""
return chain(*[[s] if not isinstance(s, (ConfigBase, AppriseConfig))
else iter(s.servers()) for s in self.servers])
def __len__(self):
"""
Returns the number of servers loaded; this includes those found within
loaded configuration. This funtion nnever actually counts the
Config entry themselves (if they exist), only what they contain.
"""
return sum([1 if not isinstance(s, (ConfigBase, AppriseConfig))
else len(s.servers()) for s in self.servers])
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