__filename__ = "follow.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.2.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@libreserver.org"
__status__ = "Production"
__module_group__ = "ActivityPub"

from pprint import pprint
import os
from utils import has_object_string_object
from utils import has_object_stringType
from utils import remove_domain_port
from utils import has_users_path
from utils import get_full_domain
from utils import get_followers_list
from utils import valid_nickname
from utils import domain_permitted
from utils import get_domain_from_actor
from utils import get_nickname_from_actor
from utils import get_status_number
from utils import follow_person
from posts import send_signed_json
from posts import get_person_box
from utils import load_json
from utils import save_json
from utils import is_account_dir
from utils import get_user_paths
from utils import acct_dir
from utils import has_group_type
from utils import local_actor_url
from acceptreject import create_accept
from acceptreject import create_reject
from webfinger import webfinger_handle
from auth import create_basic_auth_header
from session import get_json
from session import post_json


def create_initial_last_seen(base_dir: str, http_prefix: str) -> None:
    """Creates initial lastseen files for all follows.
    The lastseen files are used to generate the Zzz icons on
    follows/following lists on the profile screen.
    """
    for subdir, dirs, files in os.walk(base_dir + '/accounts'):
        for acct in dirs:
            if not is_account_dir(acct):
                continue
            accountDir = os.path.join(base_dir + '/accounts', acct)
            followingFilename = accountDir + '/following.txt'
            if not os.path.isfile(followingFilename):
                continue
            lastSeenDir = accountDir + '/lastseen'
            if not os.path.isdir(lastSeenDir):
                os.mkdir(lastSeenDir)
            followingHandles = []
            try:
                with open(followingFilename, 'r') as fp:
                    followingHandles = fp.readlines()
            except OSError:
                print('EX: create_initial_last_seen ' + followingFilename)
            for handle in followingHandles:
                if '#' in handle:
                    continue
                if '@' not in handle:
                    continue
                handle = handle.replace('\n', '')
                nickname = handle.split('@')[0]
                domain = handle.split('@')[1]
                if nickname.startswith('!'):
                    nickname = nickname[1:]
                actor = local_actor_url(http_prefix, nickname, domain)
                lastSeenFilename = \
                    lastSeenDir + '/' + actor.replace('/', '#') + '.txt'
                if not os.path.isfile(lastSeenFilename):
                    try:
                        with open(lastSeenFilename, 'w+') as fp:
                            fp.write(str(100))
                    except OSError:
                        print('EX: create_initial_last_seen 2 ' +
                              lastSeenFilename)
        break


def _pre_approved_follower(base_dir: str,
                           nickname: str, domain: str,
                           approveHandle: str) -> bool:
    """Is the given handle an already manually approved follower?
    """
    handle = nickname + '@' + domain
    accountDir = base_dir + '/accounts/' + handle
    approvedFilename = accountDir + '/approved.txt'
    if os.path.isfile(approvedFilename):
        if approveHandle in open(approvedFilename).read():
            return True
    return False


def _remove_from_follow_base(base_dir: str,
                             nickname: str, domain: str,
                             acceptOrDenyHandle: str, followFile: str,
                             debug: bool) -> None:
    """Removes a handle/actor from follow requests or rejects file
    """
    handle = nickname + '@' + domain
    accountsDir = base_dir + '/accounts/' + handle
    approveFollowsFilename = accountsDir + '/' + followFile + '.txt'
    if not os.path.isfile(approveFollowsFilename):
        if debug:
            print('WARN: Approve follow requests file ' +
                  approveFollowsFilename + ' not found')
        return
    acceptDenyActor = None
    if acceptOrDenyHandle not in open(approveFollowsFilename).read():
        # is this stored in the file as an actor rather than a handle?
        acceptDenyNickname = acceptOrDenyHandle.split('@')[0]
        acceptDenyDomain = acceptOrDenyHandle.split('@')[1]
        # for each possible users path construct an actor and
        # check if it exists in teh file
        usersPaths = get_user_paths()
        actorFound = False
        for usersName in usersPaths:
            acceptDenyActor = \
                '://' + acceptDenyDomain + usersName + acceptDenyNickname
            if acceptDenyActor in open(approveFollowsFilename).read():
                actorFound = True
                break
        if not actorFound:
            return
    try:
        with open(approveFollowsFilename + '.new', 'w+') as approvefilenew:
            with open(approveFollowsFilename, 'r') as approvefile:
                if not acceptDenyActor:
                    for approveHandle in approvefile:
                        if not approveHandle.startswith(acceptOrDenyHandle):
                            approvefilenew.write(approveHandle)
                else:
                    for approveHandle in approvefile:
                        if acceptDenyActor not in approveHandle:
                            approvefilenew.write(approveHandle)
    except OSError as ex:
        print('EX: _remove_from_follow_base ' +
              approveFollowsFilename + ' ' + str(ex))

    os.rename(approveFollowsFilename + '.new', approveFollowsFilename)


def remove_from_follow_requests(base_dir: str,
                                nickname: str, domain: str,
                                denyHandle: str, debug: bool) -> None:
    """Removes a handle from follow requests
    """
    _remove_from_follow_base(base_dir, nickname, domain,
                             denyHandle, 'followrequests', debug)


def _remove_from_follow_rejects(base_dir: str,
                                nickname: str, domain: str,
                                acceptHandle: str, debug: bool) -> None:
    """Removes a handle from follow rejects
    """
    _remove_from_follow_base(base_dir, nickname, domain,
                             acceptHandle, 'followrejects', debug)


def is_following_actor(base_dir: str,
                       nickname: str, domain: str, actor: str) -> bool:
    """Is the given nickname following the given actor?
    The actor can also be a handle: nickname@domain
    """
    domain = remove_domain_port(domain)
    handle = nickname + '@' + domain
    if not os.path.isdir(base_dir + '/accounts/' + handle):
        return False
    followingFile = base_dir + '/accounts/' + handle + '/following.txt'
    if not os.path.isfile(followingFile):
        return False
    if actor.lower() in open(followingFile).read().lower():
        return True
    followingNickname = get_nickname_from_actor(actor)
    if not followingNickname:
        print('WARN: unable to find nickname in ' + actor)
        return False
    followingDomain, followingPort = get_domain_from_actor(actor)
    followingHandle = \
        get_full_domain(followingNickname + '@' + followingDomain,
                        followingPort)
    if followingHandle.lower() in open(followingFile).read().lower():
        return True
    return False


def get_mutuals_of_person(base_dir: str,
                          nickname: str, domain: str) -> []:
    """Returns the mutuals of a person
    i.e. accounts which they follow and which also follow back
    """
    followers = \
        get_followers_list(base_dir, nickname, domain, 'followers.txt')
    following = \
        get_followers_list(base_dir, nickname, domain, 'following.txt')
    mutuals = []
    for handle in following:
        if handle in followers:
            mutuals.append(handle)
    return mutuals


def add_follower_of_person(base_dir: str, nickname: str, domain: str,
                           followerNickname: str, followerDomain: str,
                           federation_list: [], debug: bool,
                           group_account: bool) -> bool:
    """Adds a follower of the given person
    """
    return follow_person(base_dir, nickname, domain,
                         followerNickname, followerDomain,
                         federation_list, debug, group_account,
                         'followers.txt')


def get_follower_domains(base_dir: str, nickname: str, domain: str) -> []:
    """Returns a list of domains for followers
    """
    domain = remove_domain_port(domain)
    followersFile = acct_dir(base_dir, nickname, domain) + '/followers.txt'
    if not os.path.isfile(followersFile):
        return []

    lines = []
    try:
        with open(followersFile, 'r') as fpFollowers:
            lines = fpFollowers.readlines()
    except OSError:
        print('EX: get_follower_domains ' + followersFile)

    domainsList = []
    for handle in lines:
        handle = handle.replace('\n', '')
        followerDomain, _ = get_domain_from_actor(handle)
        if not followerDomain:
            continue
        if followerDomain not in domainsList:
            domainsList.append(followerDomain)
    return domainsList


def is_follower_of_person(base_dir: str, nickname: str, domain: str,
                          followerNickname: str, followerDomain: str) -> bool:
    """is the given nickname a follower of followerNickname?
    """
    if not followerDomain:
        print('No followerDomain')
        return False
    if not followerNickname:
        print('No followerNickname for ' + followerDomain)
        return False
    domain = remove_domain_port(domain)
    followersFile = acct_dir(base_dir, nickname, domain) + '/followers.txt'
    if not os.path.isfile(followersFile):
        return False
    handle = followerNickname + '@' + followerDomain

    alreadyFollowing = False

    followersStr = ''
    try:
        with open(followersFile, 'r') as fpFollowers:
            followersStr = fpFollowers.read()
    except OSError:
        print('EX: is_follower_of_person ' + followersFile)

    if handle in followersStr:
        alreadyFollowing = True
    else:
        paths = get_user_paths()
        for userPath in paths:
            url = '://' + followerDomain + userPath + followerNickname
            if url in followersStr:
                alreadyFollowing = True
                break

    return alreadyFollowing


def unfollow_account(base_dir: str, nickname: str, domain: str,
                     followNickname: str, followDomain: str,
                     debug: bool, group_account: bool,
                     followFile: str = 'following.txt') -> bool:
    """Removes a person to the follow list
    """
    domain = remove_domain_port(domain)
    handle = nickname + '@' + domain
    handleToUnfollow = followNickname + '@' + followDomain
    if group_account:
        handleToUnfollow = '!' + handleToUnfollow
    if not os.path.isdir(base_dir + '/accounts'):
        os.mkdir(base_dir + '/accounts')
    if not os.path.isdir(base_dir + '/accounts/' + handle):
        os.mkdir(base_dir + '/accounts/' + handle)

    filename = base_dir + '/accounts/' + handle + '/' + followFile
    if not os.path.isfile(filename):
        if debug:
            print('DEBUG: follow file ' + filename + ' was not found')
        return False
    handleToUnfollowLower = handleToUnfollow.lower()
    if handleToUnfollowLower not in open(filename).read().lower():
        if debug:
            print('DEBUG: handle to unfollow ' + handleToUnfollow +
                  ' is not in ' + filename)
        return
    lines = []
    try:
        with open(filename, 'r') as f:
            lines = f.readlines()
    except OSError:
        print('EX: unfollow_account ' + filename)
    if lines:
        try:
            with open(filename, 'w+') as f:
                for line in lines:
                    checkHandle = line.strip("\n").strip("\r").lower()
                    if checkHandle != handleToUnfollowLower and \
                       checkHandle != '!' + handleToUnfollowLower:
                        f.write(line)
        except OSError as ex:
            print('EX: unable to write ' + filename + ' ' + str(ex))

    # write to an unfollowed file so that if a follow accept
    # later arrives then it can be ignored
    unfollowedFilename = base_dir + '/accounts/' + handle + '/unfollowed.txt'
    if os.path.isfile(unfollowedFilename):
        if handleToUnfollowLower not in \
           open(unfollowedFilename).read().lower():
            try:
                with open(unfollowedFilename, 'a+') as f:
                    f.write(handleToUnfollow + '\n')
            except OSError:
                print('EX: unable to append ' + unfollowedFilename)
    else:
        try:
            with open(unfollowedFilename, 'w+') as f:
                f.write(handleToUnfollow + '\n')
        except OSError:
            print('EX: unable to write ' + unfollowedFilename)

    return True


def unfollower_of_account(base_dir: str, nickname: str, domain: str,
                          followerNickname: str, followerDomain: str,
                          debug: bool, group_account: bool) -> bool:
    """Remove a follower of a person
    """
    return unfollow_account(base_dir, nickname, domain,
                            followerNickname, followerDomain,
                            debug, group_account, 'followers.txt')


def clear_follows(base_dir: str, nickname: str, domain: str,
                  followFile: str = 'following.txt') -> None:
    """Removes all follows
    """
    handle = nickname + '@' + domain
    if not os.path.isdir(base_dir + '/accounts'):
        os.mkdir(base_dir + '/accounts')
    if not os.path.isdir(base_dir + '/accounts/' + handle):
        os.mkdir(base_dir + '/accounts/' + handle)
    filename = base_dir + '/accounts/' + handle + '/' + followFile
    if os.path.isfile(filename):
        try:
            os.remove(filename)
        except OSError:
            print('EX: clear_follows unable to delete ' + filename)


def clear_followers(base_dir: str, nickname: str, domain: str) -> None:
    """Removes all followers
    """
    clear_follows(base_dir, nickname, domain, 'followers.txt')


def _get_no_of_follows(base_dir: str, nickname: str, domain: str,
                       authenticated: bool,
                       followFile='following.txt') -> int:
    """Returns the number of follows or followers
    """
    # only show number of followers to authenticated
    # account holders
    # if not authenticated:
    #     return 9999
    handle = nickname + '@' + domain
    filename = base_dir + '/accounts/' + handle + '/' + followFile
    if not os.path.isfile(filename):
        return 0
    ctr = 0
    lines = []
    try:
        with open(filename, 'r') as f:
            lines = f.readlines()
    except OSError:
        print('EX: _get_no_of_follows ' + filename)
    if lines:
        for line in lines:
            if '#' in line:
                continue
            if '@' in line and \
               '.' in line and \
               not line.startswith('http'):
                ctr += 1
            elif ((line.startswith('http') or
                   line.startswith('hyper')) and
                  has_users_path(line)):
                ctr += 1
    return ctr


def get_no_of_followers(base_dir: str,
                        nickname: str, domain: str,
                        authenticated: bool) -> int:
    """Returns the number of followers of the given person
    """
    return _get_no_of_follows(base_dir, nickname, domain,
                              authenticated, 'followers.txt')


def get_following_feed(base_dir: str, domain: str, port: int, path: str,
                       http_prefix: str, authorized: bool,
                       follows_per_page=12,
                       followFile='following') -> {}:
    """Returns the following and followers feeds from GET requests.
    This accesses the following.txt or followers.txt and builds a collection.
    """
    # Show a small number of follows to non-authorized viewers
    if not authorized:
        follows_per_page = 6

    if '/' + followFile not in path:
        return None
    # handle page numbers
    headerOnly = True
    pageNumber = None
    if '?page=' in path:
        pageNumber = path.split('?page=')[1]
        if pageNumber == 'true' or not authorized:
            pageNumber = 1
        else:
            try:
                pageNumber = int(pageNumber)
            except BaseException:
                print('EX: get_following_feed unable to convert to int ' +
                      str(pageNumber))
                pass
        path = path.split('?page=')[0]
        headerOnly = False

    if not path.endswith('/' + followFile):
        return None
    nickname = None
    if path.startswith('/users/'):
        nickname = path.replace('/users/', '', 1).replace('/' + followFile, '')
    if path.startswith('/@'):
        nickname = path.replace('/@', '', 1).replace('/' + followFile, '')
    if not nickname:
        return None
    if not valid_nickname(domain, nickname):
        return None

    domain = get_full_domain(domain, port)

    if headerOnly:
        firstStr = \
            local_actor_url(http_prefix, nickname, domain) + \
            '/' + followFile + '?page=1'
        idStr = \
            local_actor_url(http_prefix, nickname, domain) + '/' + followFile
        totalStr = \
            _get_no_of_follows(base_dir, nickname, domain, authorized)
        following = {
            '@context': 'https://www.w3.org/ns/activitystreams',
            'first': firstStr,
            'id': idStr,
            'totalItems': totalStr,
            'type': 'OrderedCollection'
        }
        return following

    if not pageNumber:
        pageNumber = 1

    nextPageNumber = int(pageNumber + 1)
    idStr = \
        local_actor_url(http_prefix, nickname, domain) + \
        '/' + followFile + '?page=' + str(pageNumber)
    partOfStr = \
        local_actor_url(http_prefix, nickname, domain) + '/' + followFile
    following = {
        '@context': 'https://www.w3.org/ns/activitystreams',
        'id': idStr,
        'orderedItems': [],
        'partOf': partOfStr,
        'totalItems': 0,
        'type': 'OrderedCollectionPage'
    }

    handleDomain = domain
    handleDomain = remove_domain_port(handleDomain)
    handle = nickname + '@' + handleDomain
    filename = base_dir + '/accounts/' + handle + '/' + followFile + '.txt'
    if not os.path.isfile(filename):
        return following
    currPage = 1
    pageCtr = 0
    totalCtr = 0
    lines = []
    try:
        with open(filename, 'r') as f:
            lines = f.readlines()
    except OSError:
        print('EX: get_following_feed ' + filename)
    for line in lines:
        if '#' not in line:
            if '@' in line and not line.startswith('http'):
                # nickname@domain
                pageCtr += 1
                totalCtr += 1
                if currPage == pageNumber:
                    line2 = \
                        line.lower().replace('\n', '').replace('\r', '')
                    nick = line2.split('@')[0]
                    dom = line2.split('@')[1]
                    if not nick.startswith('!'):
                        # person actor
                        url = local_actor_url(http_prefix, nick, dom)
                    else:
                        # group actor
                        url = http_prefix + '://' + dom + '/c/' + nick
                    following['orderedItems'].append(url)
            elif ((line.startswith('http') or
                   line.startswith('hyper')) and
                  has_users_path(line)):
                # https://domain/users/nickname
                pageCtr += 1
                totalCtr += 1
                if currPage == pageNumber:
                    appendStr = \
                        line.lower().replace('\n', '').replace('\r', '')
                    following['orderedItems'].append(appendStr)
        if pageCtr >= follows_per_page:
            pageCtr = 0
            currPage += 1
    following['totalItems'] = totalCtr
    lastPage = int(totalCtr / follows_per_page)
    if lastPage < 1:
        lastPage = 1
    if nextPageNumber > lastPage:
        following['next'] = \
            local_actor_url(http_prefix, nickname, domain) + \
            '/' + followFile + '?page=' + str(lastPage)
    return following


def follow_approval_required(base_dir: str, nicknameToFollow: str,
                             domainToFollow: str, debug: bool,
                             followRequestHandle: str) -> bool:
    """ Returns the policy for follower approvals
    """
    # has this handle already been manually approved?
    if _pre_approved_follower(base_dir, nicknameToFollow, domainToFollow,
                              followRequestHandle):
        return False

    manuallyApproveFollows = False
    domainToFollow = remove_domain_port(domainToFollow)
    actorFilename = base_dir + '/accounts/' + \
        nicknameToFollow + '@' + domainToFollow + '.json'
    if os.path.isfile(actorFilename):
        actor = load_json(actorFilename)
        if actor:
            if actor.get('manuallyApprovesFollowers'):
                manuallyApproveFollows = actor['manuallyApprovesFollowers']
            else:
                if debug:
                    print(nicknameToFollow + '@' + domainToFollow +
                          ' automatically approves followers')
    else:
        if debug:
            print('DEBUG: Actor file not found: ' + actorFilename)
    return manuallyApproveFollows


def no_of_follow_requests(base_dir: str,
                          nicknameToFollow: str, domainToFollow: str,
                          nickname: str, domain: str, fromPort: int,
                          followType: str) -> int:
    """Returns the current number of follow requests
    """
    accountsDir = base_dir + '/accounts/' + \
        nicknameToFollow + '@' + domainToFollow
    approveFollowsFilename = accountsDir + '/followrequests.txt'
    if not os.path.isfile(approveFollowsFilename):
        return 0
    ctr = 0
    lines = []
    try:
        with open(approveFollowsFilename, 'r') as f:
            lines = f.readlines()
    except OSError:
        print('EX: no_of_follow_requests ' + approveFollowsFilename)
    if lines:
        if followType == "onion":
            for fileLine in lines:
                if '.onion' in fileLine:
                    ctr += 1
        elif followType == "i2p":
            for fileLine in lines:
                if '.i2p' in fileLine:
                    ctr += 1
        else:
            return len(lines)
    return ctr


def store_follow_request(base_dir: str,
                         nicknameToFollow: str, domainToFollow: str, port: int,
                         nickname: str, domain: str, fromPort: int,
                         followJson: {},
                         debug: bool, personUrl: str,
                         group_account: bool) -> bool:
    """Stores the follow request for later use
    """
    accountsDir = base_dir + '/accounts/' + \
        nicknameToFollow + '@' + domainToFollow
    if not os.path.isdir(accountsDir):
        return False

    domain_full = get_full_domain(domain, fromPort)
    approveHandle = get_full_domain(nickname + '@' + domain, fromPort)

    if group_account:
        approveHandle = '!' + approveHandle

    followersFilename = accountsDir + '/followers.txt'
    if os.path.isfile(followersFilename):
        alreadyFollowing = False

        followersStr = ''
        try:
            with open(followersFilename, 'r') as fpFollowers:
                followersStr = fpFollowers.read()
        except OSError:
            print('EX: store_follow_request ' + followersFilename)

        if approveHandle in followersStr:
            alreadyFollowing = True
        else:
            usersPaths = get_user_paths()
            for possibleUsersPath in usersPaths:
                url = '://' + domain_full + possibleUsersPath + nickname
                if url in followersStr:
                    alreadyFollowing = True
                    break

        if alreadyFollowing:
            if debug:
                print('DEBUG: ' +
                      nicknameToFollow + '@' + domainToFollow +
                      ' already following ' + approveHandle)
            return True

    # should this follow be denied?
    denyFollowsFilename = accountsDir + '/followrejects.txt'
    if os.path.isfile(denyFollowsFilename):
        if approveHandle in open(denyFollowsFilename).read():
            remove_from_follow_requests(base_dir, nicknameToFollow,
                                        domainToFollow, approveHandle, debug)
            print(approveHandle + ' was already denied as a follower of ' +
                  nicknameToFollow)
            return True

    # add to a file which contains a list of requests
    approveFollowsFilename = accountsDir + '/followrequests.txt'

    # store either nick@domain or the full person/actor url
    approveHandleStored = approveHandle
    if '/users/' not in personUrl:
        approveHandleStored = personUrl
        if group_account:
            approveHandle = '!' + approveHandle

    if os.path.isfile(approveFollowsFilename):
        if approveHandle not in open(approveFollowsFilename).read():
            try:
                with open(approveFollowsFilename, 'a+') as fp:
                    fp.write(approveHandleStored + '\n')
            except OSError:
                print('EX: store_follow_request 2 ' + approveFollowsFilename)
        else:
            if debug:
                print('DEBUG: ' + approveHandleStored +
                      ' is already awaiting approval')
    else:
        try:
            with open(approveFollowsFilename, 'w+') as fp:
                fp.write(approveHandleStored + '\n')
        except OSError:
            print('EX: store_follow_request 3 ' + approveFollowsFilename)

    # store the follow request in its own directory
    # We don't rely upon the inbox because items in there could expire
    requestsDir = accountsDir + '/requests'
    if not os.path.isdir(requestsDir):
        os.mkdir(requestsDir)
    followActivityfilename = requestsDir + '/' + approveHandle + '.follow'
    return save_json(followJson, followActivityfilename)


def followed_account_accepts(session, base_dir: str, http_prefix: str,
                             nicknameToFollow: str, domainToFollow: str,
                             port: int,
                             nickname: str, domain: str, fromPort: int,
                             personUrl: str, federation_list: [],
                             followJson: {}, send_threads: [], postLog: [],
                             cached_webfingers: {}, person_cache: {},
                             debug: bool, project_version: str,
                             removeFollowActivity: bool,
                             signing_priv_key_pem: str):
    """The person receiving a follow request accepts the new follower
    and sends back an Accept activity
    """
    acceptHandle = nickname + '@' + domain

    # send accept back
    if debug:
        print('DEBUG: sending Accept activity for ' +
              'follow request which arrived at ' +
              nicknameToFollow + '@' + domainToFollow +
              ' back to ' + acceptHandle)
    acceptJson = create_accept(base_dir, federation_list,
                               nicknameToFollow, domainToFollow, port,
                               personUrl, '', http_prefix,
                               followJson)
    if debug:
        pprint(acceptJson)
        print('DEBUG: sending follow Accept from ' +
              nicknameToFollow + '@' + domainToFollow +
              ' port ' + str(port) + ' to ' +
              acceptHandle + ' port ' + str(fromPort))
    client_to_server = False

    if removeFollowActivity:
        # remove the follow request json
        followActivityfilename = \
            acct_dir(base_dir, nicknameToFollow, domainToFollow) + \
            '/requests/' + \
            nickname + '@' + domain + '.follow'
        if os.path.isfile(followActivityfilename):
            try:
                os.remove(followActivityfilename)
            except OSError:
                print('EX: followed_account_accepts unable to delete ' +
                      followActivityfilename)

    group_account = False
    if followJson:
        if followJson.get('actor'):
            if has_group_type(base_dir, followJson['actor'], person_cache):
                group_account = True

    return send_signed_json(acceptJson, session, base_dir,
                            nicknameToFollow, domainToFollow, port,
                            nickname, domain, fromPort, '',
                            http_prefix, True, client_to_server,
                            federation_list,
                            send_threads, postLog, cached_webfingers,
                            person_cache, debug, project_version, None,
                            group_account, signing_priv_key_pem,
                            7856837)


def followed_account_rejects(session, base_dir: str, http_prefix: str,
                             nicknameToFollow: str, domainToFollow: str,
                             port: int,
                             nickname: str, domain: str, fromPort: int,
                             federation_list: [],
                             send_threads: [], postLog: [],
                             cached_webfingers: {}, person_cache: {},
                             debug: bool, project_version: str,
                             signing_priv_key_pem: str):
    """The person receiving a follow request rejects the new follower
    and sends back a Reject activity
    """
    # send reject back
    if debug:
        print('DEBUG: sending Reject activity for ' +
              'follow request which arrived at ' +
              nicknameToFollow + '@' + domainToFollow +
              ' back to ' + nickname + '@' + domain)

    # get the json for the original follow request
    followActivityfilename = \
        acct_dir(base_dir, nicknameToFollow, domainToFollow) + '/requests/' + \
        nickname + '@' + domain + '.follow'
    followJson = load_json(followActivityfilename)
    if not followJson:
        print('No follow request json was found for ' +
              followActivityfilename)
        return None
    # actor who made the follow request
    personUrl = followJson['actor']

    # create the reject activity
    rejectJson = \
        create_reject(base_dir, federation_list,
                      nicknameToFollow, domainToFollow, port,
                      personUrl, '', http_prefix, followJson)
    if debug:
        pprint(rejectJson)
        print('DEBUG: sending follow Reject from ' +
              nicknameToFollow + '@' + domainToFollow +
              ' port ' + str(port) + ' to ' +
              nickname + '@' + domain + ' port ' + str(fromPort))
    client_to_server = False
    denyHandle = get_full_domain(nickname + '@' + domain, fromPort)
    group_account = False
    if has_group_type(base_dir, personUrl, person_cache):
        group_account = True
    # remove from the follow requests file
    remove_from_follow_requests(base_dir, nicknameToFollow, domainToFollow,
                                denyHandle, debug)
    # remove the follow request json
    try:
        os.remove(followActivityfilename)
    except OSError:
        print('EX: followed_account_rejects unable to delete ' +
              followActivityfilename)
    # send the reject activity
    return send_signed_json(rejectJson, session, base_dir,
                            nicknameToFollow, domainToFollow, port,
                            nickname, domain, fromPort, '',
                            http_prefix, True, client_to_server,
                            federation_list,
                            send_threads, postLog, cached_webfingers,
                            person_cache, debug, project_version, None,
                            group_account, signing_priv_key_pem,
                            6393063)


def send_follow_request(session, base_dir: str,
                        nickname: str, domain: str, port: int,
                        http_prefix: str,
                        followNickname: str, followDomain: str,
                        followedActor: str,
                        followPort: int, followHttpPrefix: str,
                        client_to_server: bool, federation_list: [],
                        send_threads: [], postLog: [], cached_webfingers: {},
                        person_cache: {}, debug: bool,
                        project_version: str, signing_priv_key_pem: str) -> {}:
    """Gets the json object for sending a follow request
    """
    if not signing_priv_key_pem:
        print('WARN: follow request without signing key')

    if not domain_permitted(followDomain, federation_list):
        print('You are not permitted to follow the domain ' + followDomain)
        return None

    fullDomain = get_full_domain(domain, port)
    followActor = local_actor_url(http_prefix, nickname, fullDomain)

    requestDomain = get_full_domain(followDomain, followPort)

    statusNumber, published = get_status_number()

    group_account = False
    if followNickname:
        followedId = followedActor
        followHandle = followNickname + '@' + requestDomain
        group_account = has_group_type(base_dir, followedActor, person_cache)
        if group_account:
            followHandle = '!' + followHandle
            print('Follow request being sent to group account')
    else:
        if debug:
            print('DEBUG: send_follow_request - assuming single user instance')
        followedId = followHttpPrefix + '://' + requestDomain
        singleUserNickname = 'dev'
        followHandle = singleUserNickname + '@' + requestDomain

    # remove follow handle from unfollowed.txt
    unfollowedFilename = \
        acct_dir(base_dir, nickname, domain) + '/unfollowed.txt'
    if os.path.isfile(unfollowedFilename):
        if followHandle in open(unfollowedFilename).read():
            unfollowedFile = None
            try:
                with open(unfollowedFilename, 'r') as fp:
                    unfollowedFile = fp.read()
            except OSError:
                print('EX: send_follow_request ' + unfollowedFilename)
            if unfollowedFile:
                unfollowedFile = \
                    unfollowedFile.replace(followHandle + '\n', '')
                try:
                    with open(unfollowedFilename, 'w+') as fp:
                        fp.write(unfollowedFile)
                except OSError:
                    print('EX: unable to write ' + unfollowedFilename)

    newFollowJson = {
        '@context': 'https://www.w3.org/ns/activitystreams',
        'id': followActor + '/statuses/' + str(statusNumber),
        'type': 'Follow',
        'actor': followActor,
        'object': followedId
    }
    if group_account:
        newFollowJson['to'] = followedId
        print('Follow request: ' + str(newFollowJson))

    if follow_approval_required(base_dir, nickname, domain, debug,
                                followHandle):
        # Remove any follow requests rejected for the account being followed.
        # It's assumed that if you are following someone then you are
        # ok with them following back. If this isn't the case then a rejected
        # follow request will block them again.
        _remove_from_follow_rejects(base_dir,
                                    nickname, domain,
                                    followHandle, debug)

    send_signed_json(newFollowJson, session, base_dir, nickname, domain, port,
                     followNickname, followDomain, followPort,
                     'https://www.w3.org/ns/activitystreams#Public',
                     http_prefix, True, client_to_server,
                     federation_list,
                     send_threads, postLog, cached_webfingers, person_cache,
                     debug, project_version, None, group_account,
                     signing_priv_key_pem, 8234389)

    return newFollowJson


def send_follow_requestViaServer(base_dir: str, session,
                                 fromNickname: str, password: str,
                                 fromDomain: str, fromPort: int,
                                 followNickname: str, followDomain: str,
                                 followPort: int,
                                 http_prefix: str,
                                 cached_webfingers: {}, person_cache: {},
                                 debug: bool, project_version: str,
                                 signing_priv_key_pem: str) -> {}:
    """Creates a follow request via c2s
    """
    if not session:
        print('WARN: No session for send_follow_requestViaServer')
        return 6

    fromDomainFull = get_full_domain(fromDomain, fromPort)

    followDomainFull = get_full_domain(followDomain, followPort)

    followActor = local_actor_url(http_prefix, fromNickname, fromDomainFull)
    followedId = \
        http_prefix + '://' + followDomainFull + '/@' + followNickname

    statusNumber, published = get_status_number()
    newFollowJson = {
        '@context': 'https://www.w3.org/ns/activitystreams',
        'id': followActor + '/statuses/' + str(statusNumber),
        'type': 'Follow',
        'actor': followActor,
        'object': followedId
    }

    handle = http_prefix + '://' + fromDomainFull + '/@' + fromNickname

    # lookup the inbox for the To handle
    wfRequest = \
        webfinger_handle(session, handle, http_prefix, cached_webfingers,
                         fromDomain, project_version, debug, False,
                         signing_priv_key_pem)
    if not wfRequest:
        if debug:
            print('DEBUG: follow request webfinger failed for ' + handle)
        return 1
    if not isinstance(wfRequest, dict):
        print('WARN: follow request Webfinger for ' + handle +
              ' did not return a dict. ' + str(wfRequest))
        return 1

    postToBox = 'outbox'

    # get the actor inbox for the To handle
    originDomain = fromDomain
    (inboxUrl, pubKeyId, pubKey,
     fromPersonId, sharedInbox, avatarUrl,
     displayName, _) = get_person_box(signing_priv_key_pem, originDomain,
                                      base_dir, session, wfRequest,
                                      person_cache,
                                      project_version, http_prefix,
                                      fromNickname,
                                      fromDomain, postToBox, 52025)

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

    authHeader = create_basic_auth_header(fromNickname, password)

    headers = {
        'host': fromDomain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }
    postResult = \
        post_json(http_prefix, fromDomainFull,
                  session, newFollowJson, [], inboxUrl, headers, 3, True)
    if not postResult:
        if debug:
            print('DEBUG: POST follow request failed for c2s to ' + inboxUrl)
        return 5

    if debug:
        print('DEBUG: c2s POST follow request success')

    return newFollowJson


def send_unfollow_request_via_server(base_dir: str, session,
                                     fromNickname: str, password: str,
                                     fromDomain: str, fromPort: int,
                                     followNickname: str, followDomain: str,
                                     followPort: int,
                                     http_prefix: str,
                                     cached_webfingers: {}, person_cache: {},
                                     debug: bool, project_version: str,
                                     signing_priv_key_pem: str) -> {}:
    """Creates a unfollow request via c2s
    """
    if not session:
        print('WARN: No session for send_unfollow_request_via_server')
        return 6

    fromDomainFull = get_full_domain(fromDomain, fromPort)
    followDomainFull = get_full_domain(followDomain, followPort)

    followActor = local_actor_url(http_prefix, fromNickname, fromDomainFull)
    followedId = \
        http_prefix + '://' + followDomainFull + '/@' + followNickname
    statusNumber, published = get_status_number()

    unfollowJson = {
        '@context': 'https://www.w3.org/ns/activitystreams',
        'id': followActor + '/statuses/' + str(statusNumber) + '/undo',
        'type': 'Undo',
        'actor': followActor,
        'object': {
            'id': followActor + '/statuses/' + str(statusNumber),
            'type': 'Follow',
            'actor': followActor,
            'object': followedId
        }
    }

    handle = http_prefix + '://' + fromDomainFull + '/@' + fromNickname

    # lookup the inbox for the To handle
    wfRequest = \
        webfinger_handle(session, handle, http_prefix, cached_webfingers,
                         fromDomain, project_version, debug, False,
                         signing_priv_key_pem)
    if not wfRequest:
        if debug:
            print('DEBUG: unfollow webfinger failed for ' + handle)
        return 1
    if not isinstance(wfRequest, dict):
        print('WARN: unfollow webfinger for ' + handle +
              ' did not return a dict. ' + str(wfRequest))
        return 1

    postToBox = 'outbox'

    # get the actor inbox for the To handle
    originDomain = fromDomain
    (inboxUrl, pubKeyId, pubKey, fromPersonId, sharedInbox, avatarUrl,
     displayName, _) = get_person_box(signing_priv_key_pem,
                                      originDomain,
                                      base_dir, session,
                                      wfRequest, person_cache,
                                      project_version, http_prefix,
                                      fromNickname,
                                      fromDomain, postToBox,
                                      76536)

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

    authHeader = create_basic_auth_header(fromNickname, password)

    headers = {
        'host': fromDomain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }
    postResult = \
        post_json(http_prefix, fromDomainFull,
                  session, unfollowJson, [], inboxUrl, headers, 3, True)
    if not postResult:
        if debug:
            print('DEBUG: POST unfollow failed for c2s to ' + inboxUrl)
        return 5

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

    return unfollowJson


def get_following_via_server(base_dir: str, session,
                             nickname: str, password: str,
                             domain: str, port: int,
                             http_prefix: str, pageNumber: int,
                             cached_webfingers: {}, person_cache: {},
                             debug: bool, project_version: str,
                             signing_priv_key_pem: str) -> {}:
    """Gets a page from the following collection as json
    """
    if not session:
        print('WARN: No session for get_following_via_server')
        return 6

    domain_full = get_full_domain(domain, port)
    followActor = local_actor_url(http_prefix, nickname, domain_full)

    authHeader = create_basic_auth_header(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }

    if pageNumber < 1:
        pageNumber = 1
    url = followActor + '/following?page=' + str(pageNumber)
    followingJson = \
        get_json(signing_priv_key_pem, session, url, headers, {}, debug,
                 __version__, http_prefix, domain, 10, True)
    if not followingJson:
        if debug:
            print('DEBUG: GET following list failed for c2s to ' + url)
        return 5

    if debug:
        print('DEBUG: c2s GET following list request success')

    return followingJson


def get_followers_via_server(base_dir: str, session,
                             nickname: str, password: str,
                             domain: str, port: int,
                             http_prefix: str, pageNumber: int,
                             cached_webfingers: {}, person_cache: {},
                             debug: bool, project_version: str,
                             signing_priv_key_pem: str) -> {}:
    """Gets a page from the followers collection as json
    """
    if not session:
        print('WARN: No session for get_followers_via_server')
        return 6

    domain_full = get_full_domain(domain, port)
    followActor = local_actor_url(http_prefix, nickname, domain_full)

    authHeader = create_basic_auth_header(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }

    if pageNumber < 1:
        pageNumber = 1
    url = followActor + '/followers?page=' + str(pageNumber)
    followersJson = \
        get_json(signing_priv_key_pem, session, url, headers, {}, debug,
                 __version__, http_prefix, domain, 10, True)
    if not followersJson:
        if debug:
            print('DEBUG: GET followers list failed for c2s to ' + url)
        return 5

    if debug:
        print('DEBUG: c2s GET followers list request success')

    return followersJson


def get_follow_requests_via_server(base_dir: str, session,
                                   nickname: str, password: str,
                                   domain: str, port: int,
                                   http_prefix: str, pageNumber: int,
                                   cached_webfingers: {}, person_cache: {},
                                   debug: bool, project_version: str,
                                   signing_priv_key_pem: str) -> {}:
    """Gets a page from the follow requests collection as json
    """
    if not session:
        print('WARN: No session for get_follow_requests_via_server')
        return 6

    domain_full = get_full_domain(domain, port)

    followActor = local_actor_url(http_prefix, nickname, domain_full)
    authHeader = create_basic_auth_header(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'application/json',
        'Authorization': authHeader
    }

    if pageNumber < 1:
        pageNumber = 1
    url = followActor + '/followrequests?page=' + str(pageNumber)
    followersJson = \
        get_json(signing_priv_key_pem, session, url, headers, {}, debug,
                 __version__, http_prefix, domain, 10, True)
    if not followersJson:
        if debug:
            print('DEBUG: GET follow requests list failed for c2s to ' + url)
        return 5

    if debug:
        print('DEBUG: c2s GET follow requests list request success')

    return followersJson


def approve_follow_request_via_server(base_dir: str, session,
                                      nickname: str, password: str,
                                      domain: str, port: int,
                                      http_prefix: str, approveHandle: int,
                                      cached_webfingers: {}, person_cache: {},
                                      debug: bool, project_version: str,
                                      signing_priv_key_pem: str) -> str:
    """Approves a follow request
    This is not exactly via c2s though. It simulates pressing the Approve
    button on the web interface
    """
    if not session:
        print('WARN: No session for approve_follow_request_via_server')
        return 6

    domain_full = get_full_domain(domain, port)
    actor = local_actor_url(http_prefix, nickname, domain_full)

    authHeader = create_basic_auth_header(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'text/html; charset=utf-8',
        'Authorization': authHeader
    }

    url = actor + '/followapprove=' + approveHandle
    approveHtml = \
        get_json(signing_priv_key_pem, session, url, headers, {}, debug,
                 __version__, http_prefix, domain, 10, True)
    if not approveHtml:
        if debug:
            print('DEBUG: GET approve follow request failed for c2s to ' + url)
        return 5

    if debug:
        print('DEBUG: c2s GET approve follow request request success')

    return approveHtml


def deny_follow_request_via_server(base_dir: str, session,
                                   nickname: str, password: str,
                                   domain: str, port: int,
                                   http_prefix: str, denyHandle: int,
                                   cached_webfingers: {}, person_cache: {},
                                   debug: bool, project_version: str,
                                   signing_priv_key_pem: str) -> str:
    """Denies a follow request
    This is not exactly via c2s though. It simulates pressing the Deny
    button on the web interface
    """
    if not session:
        print('WARN: No session for deny_follow_request_via_server')
        return 6

    domain_full = get_full_domain(domain, port)
    actor = local_actor_url(http_prefix, nickname, domain_full)

    authHeader = create_basic_auth_header(nickname, password)

    headers = {
        'host': domain,
        'Content-type': 'text/html; charset=utf-8',
        'Authorization': authHeader
    }

    url = actor + '/followdeny=' + denyHandle
    denyHtml = \
        get_json(signing_priv_key_pem, session, url, headers, {}, debug,
                 __version__, http_prefix, domain, 10, True)
    if not denyHtml:
        if debug:
            print('DEBUG: GET deny follow request failed for c2s to ' + url)
        return 5

    if debug:
        print('DEBUG: c2s GET deny follow request request success')

    return denyHtml


def get_followers_of_actor(base_dir: str, actor: str, debug: bool) -> {}:
    """In a shared inbox if we receive a post we know who it's from
    and if it's addressed to followers then we need to get a list of those.
    This returns a list of account handles which follow the given actor
    """
    if debug:
        print('DEBUG: getting followers of ' + actor)
    recipientsDict = {}
    if ':' not in actor:
        return recipientsDict
    nickname = get_nickname_from_actor(actor)
    if not nickname:
        if debug:
            print('DEBUG: no nickname found in ' + actor)
        return recipientsDict
    domain, port = get_domain_from_actor(actor)
    if not domain:
        if debug:
            print('DEBUG: no domain found in ' + actor)
        return recipientsDict
    actorHandle = nickname + '@' + domain
    if debug:
        print('DEBUG: searching for handle ' + actorHandle)
    # for each of the accounts
    for subdir, dirs, files in os.walk(base_dir + '/accounts'):
        for account in dirs:
            if '@' in account and not account.startswith('inbox@'):
                followingFilename = \
                    os.path.join(subdir, account) + '/following.txt'
                if debug:
                    print('DEBUG: examining follows of ' + account)
                    print(followingFilename)
                if os.path.isfile(followingFilename):
                    # does this account follow the given actor?
                    if debug:
                        print('DEBUG: checking if ' + actorHandle +
                              ' in ' + followingFilename)
                    if actorHandle in open(followingFilename).read():
                        if debug:
                            print('DEBUG: ' + account +
                                  ' follows ' + actorHandle)
                        recipientsDict[account] = None
        break
    return recipientsDict


def outbox_undo_follow(base_dir: str, message_json: {}, debug: bool) -> None:
    """When an unfollow request is received by the outbox from c2s
    This removes the followed handle from the following.txt file
    of the relevant account
    """
    if not message_json.get('type'):
        return
    if not message_json['type'] == 'Undo':
        return
    if not has_object_stringType(message_json, debug):
        return
    if not message_json['object']['type'] == 'Follow':
        if not message_json['object']['type'] == 'Join':
            return
    if not has_object_string_object(message_json, debug):
        return
    if not message_json['object'].get('actor'):
        return
    if debug:
        print('DEBUG: undo follow arrived in outbox')

    nicknameFollower = get_nickname_from_actor(message_json['object']['actor'])
    if not nicknameFollower:
        print('WARN: unable to find nickname in ' +
              message_json['object']['actor'])
        return
    domainFollower, portFollower = \
        get_domain_from_actor(message_json['object']['actor'])
    domainFollowerFull = get_full_domain(domainFollower, portFollower)

    nicknameFollowing = \
        get_nickname_from_actor(message_json['object']['object'])
    if not nicknameFollowing:
        print('WARN: unable to find nickname in ' +
              message_json['object']['object'])
        return
    domainFollowing, portFollowing = \
        get_domain_from_actor(message_json['object']['object'])
    domainFollowingFull = get_full_domain(domainFollowing, portFollowing)

    group_account = \
        has_group_type(base_dir, message_json['object']['object'], None)
    if unfollow_account(base_dir, nicknameFollower, domainFollowerFull,
                        nicknameFollowing, domainFollowingFull,
                        debug, group_account):
        if debug:
            print('DEBUG: ' + nicknameFollower + ' unfollowed ' +
                  nicknameFollowing + '@' + domainFollowingFull)
    else:
        if debug:
            print('WARN: ' + nicknameFollower + ' could not unfollow ' +
                  nicknameFollowing + '@' + domainFollowingFull)


def follower_approval_active(base_dir: str,
                             nickname: str, domain: str) -> bool:
    """Returns true if the given account requires follower approval
    """
    manuallyApprovesFollowers = False
    actorFilename = acct_dir(base_dir, nickname, domain) + '.json'
    if os.path.isfile(actorFilename):
        actor_json = load_json(actorFilename)
        if actor_json:
            if actor_json.get('manuallyApprovesFollowers'):
                manuallyApprovesFollowers = \
                    actor_json['manuallyApprovesFollowers']
    return manuallyApprovesFollowers