epicyon/availability.py

__filename__ = "availability.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.1.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"

import os
from webfinger import webfingerHandle
from auth import createBasicAuthHeader
from posts import getPersonBox
from session import postJson
from utils import getNicknameFromActor
from utils import getDomainFromActor
from utils import loadJson
from utils import saveJson


def setAvailability(baseDir: str, nickname: str, domain: str,
                    status: str) -> bool:
    """Set an availability status
    """
    # avoid giant strings
    if len(status) > 128:
        return False
    actorFilename = baseDir + '/accounts/' + nickname + '@' + domain + '.json'
    if not os.path.isfile(actorFilename):
        return False
    actorJson = loadJson(actorFilename)
    if actorJson:
        actorJson['availability'] = status
        saveJson(actorJson, actorFilename)
    return True


def getAvailability(baseDir: str, nickname: str, domain: str) -> str:
    """Returns the availability for a given person
    """
    actorFilename = baseDir + '/accounts/' + nickname + '@' + domain + '.json'
    if not os.path.isfile(actorFilename):
        return False
    actorJson = loadJson(actorFilename)
    if actorJson:
        if not actorJson.get('availability'):
            return None
        return actorJson['availability']
    return None


def outboxAvailability(baseDir: str, nickname: str, messageJson: {},
                       debug: bool) -> bool:
    """Handles receiving an availability update
    """
    if not messageJson.get('type'):
        return False
    if not messageJson['type'] == 'Availability':
        return False
    if not messageJson.get('actor'):
        return False
    if not messageJson.get('object'):
        return False
    if not isinstance(messageJson['object'], str):
        return False

    actorNickname = getNicknameFromActor(messageJson['actor'])
    if actorNickname != nickname:
        return False
    domain, port = getDomainFromActor(messageJson['actor'])
    status = messageJson['object'].replace('"', '')

    return setAvailability(baseDir, nickname, domain, status)


def sendAvailabilityViaServer(baseDir: str, session,
                              nickname: str, password: str,
                              domain: str, port: int,
                              httpPrefix: str,
                              status: str,
                              cachedWebfingers: {}, personCache: {},
                              debug: bool, projectVersion: str) -> {}:
    """Sets the availability for a person via c2s
    """
    if not session:
        print('WARN: No session for sendAvailabilityViaServer')
        return 6

    domainFull = domain
    if port:
        if port != 80 and port != 443:
            if ':' not in domain:
                domainFull = domain + ':' + str(port)

    toUrl = httpPrefix + '://' + domainFull + '/users/' + nickname
    ccUrl = httpPrefix + '://' + domainFull + '/users/' + nickname + \
        '/followers'

    newAvailabilityJson = {
        'type': 'Availability',
        'actor': httpPrefix+'://'+domainFull+'/users/'+nickname,
        'object': '"'+status+'"',
        'to': [toUrl],
        'cc': [ccUrl]
    }

    handle = httpPrefix + '://' + domainFull + '/@' + nickname

    # lookup the inbox for the To handle
    wfRequest = webfingerHandle(session, handle, httpPrefix,
                                cachedWebfingers,
                                domain, projectVersion)
    if not wfRequest:
        if debug:
            print('DEBUG: announce webfinger failed for ' + handle)
        return 1
    if not isinstance(wfRequest, dict):
        print('WARN: Webfinger for ' + handle + ' did not return a dict. ' +
              str(wfRequest))
        return 1

    postToBox = 'outbox'

    # get the actor inbox for the To handle
    (inboxUrl, pubKeyId, pubKey,
     fromPersonId, sharedInbox,
     capabilityAcquisition,
     avatarUrl, displayName) = getPersonBox(baseDir, session, wfRequest,
                                            personCache, projectVersion,
                                            httpPrefix, nickname,
                                            domain, postToBox)

    if not inboxUrl:
        if debug:
            print('DEBUG: No ' + postToBox + ' was found for ' + handle)
        return 3
    if not fromPersonId:
        if debug:
            print('DEBUG: No actor was found for ' + handle)
        return 4

    authHeader = createBasicAuthHeader(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }
    postResult = postJson(session, newAvailabilityJson, [],
                          inboxUrl, headers, "inbox:write")
    if not postResult:
        print('WARN: failed to post availability')

    if debug:
        print('DEBUG: c2s POST availability success')

    return newAvailabilityJson