epicyon/mastoapiv1.py

__filename__ = "mastoapiv1.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.4.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@libreserver.org"
__status__ = "Production"
__module_group__ = "API"

import os
from utils import load_json
from utils import get_config_param
from utils import acct_dir
from utils import remove_html
from metadata import meta_data_instance


def _get_mast_api_v1id(path: str) -> int:
    """Extracts the mastodon Id number from the given path
    """
    masto_id = None
    id_path = '/api/v1/accounts/:'
    if not path.startswith(id_path):
        return None
    masto_id_str = path.replace(id_path, '')
    if '/' in masto_id_str:
        masto_id_str = masto_id_str.split('/')[0]
    if masto_id_str.isdigit():
        masto_id = int(masto_id_str)
        return masto_id
    return None


def get_masto_api_v1id_from_nickname(nickname: str) -> int:
    """Given an account nickname return the corresponding mastodon id
    """
    return int.from_bytes(nickname.encode('utf-8'), 'little')


def _int_to_bytes(num: int) -> str:
    """Integer conversion
    """
    if num == 0:
        return b""
    return _int_to_bytes(num // 256) + bytes([num % 256])


def get_nickname_from_masto_api_v1id(masto_id: int) -> str:
    """Given the mastodon Id return the nickname
    """
    nickname = _int_to_bytes(masto_id).decode()
    return nickname[::-1]


def _get_masto_api_v1account(base_dir: str, nickname: str, domain: str) -> {}:
    """See https://github.com/McKael/mastodon-documentation/
    blob/master/Using-the-API/API.md#account
    Authorization has already been performed
    """
    account_filename = acct_dir(base_dir, nickname, domain) + '.json'
    if not os.path.isfile(account_filename):
        return {}
    account_json = load_json(account_filename)
    if not account_json:
        return {}
    avatar_url = remove_html(account_json['icon']['url'])
    image_url = remove_html(account_json['image']['url'])
    masto_account_json = {
        "id": get_masto_api_v1id_from_nickname(nickname),
        "username": nickname,
        "acct": nickname,
        "display_name": account_json['name'],
        "locked": account_json['manuallyApprovesFollowers'],
        "created_at": "2016-10-05T10:30:00Z",
        "followers_count": 0,
        "following_count": 0,
        "statuses_count": 0,
        "note": account_json['summary'],
        "url": account_json['id'],
        "avatar": avatar_url,
        "avatar_static": avatar_url,
        "header": image_url,
        "header_static": image_url
    }
    return masto_account_json


def masto_api_v1_response(path: str, calling_domain: str,
                          ua_str: str,
                          authorized: bool,
                          http_prefix: str,
                          base_dir: str, nickname: str, domain: str,
                          domain_full: str,
                          onion_domain: str, i2p_domain: str,
                          translate: {},
                          registration: bool,
                          system_language: str,
                          project_version: str,
                          custom_emoji: [],
                          show_node_info_accounts: bool,
                          broch_mode: bool) -> ({}, str):
    """This is a vestigil mastodon API for the purpose
       of returning an empty result to sites like
       https://mastopeek.app-dist.eu
    """
    send_json = None
    send_json_str = ''
    if not ua_str:
        ua_str = ''

    # parts of the api needing authorization
    if authorized and nickname:
        if path == '/api/v1/accounts/verify_credentials':
            send_json = _get_masto_api_v1account(base_dir, nickname, domain)
            send_json_str = \
                'masto API account sent for ' + nickname + ' ' + ua_str

    # information about where the request is coming from
    calling_info = ' ' + ua_str + ', ' + calling_domain

    # Parts of the api which don't need authorization
    masto_id = _get_mast_api_v1id(path)
    if masto_id is not None:
        path_nickname = get_nickname_from_masto_api_v1id(masto_id)
        if path_nickname:
            original_path = path
            if '/followers?' in path or \
               '/following?' in path or \
               '/streaming/' in path or \
               '/search?' in path or \
               '/relationships?' in path or \
               '/statuses?' in path:
                path = path.split('?')[0]
            if '/streaming/' in path:
                streaming_msg = \
                    "Error: Streaming API not implemented on this instance"
                send_json = {
                    "error": streaming_msg
                }
                send_json_str = 'masto API streaming response'
            if path.endswith('/followers'):
                send_json = []
                send_json_str = \
                    'masto API followers sent for ' + nickname + \
                    calling_info
            elif path.endswith('/following'):
                send_json = []
                send_json_str = \
                    'masto API following sent for ' + nickname + \
                    calling_info
            elif path.endswith('/statuses'):
                send_json = []
                send_json_str = \
                    'masto API statuses sent for ' + nickname + \
                    calling_info
            elif path.endswith('/search'):
                send_json = []
                send_json_str = \
                    'masto API search sent ' + original_path + \
                    calling_info
            elif path.endswith('/relationships'):
                send_json = []
                send_json_str = \
                    'masto API relationships sent ' + original_path + \
                    calling_info
            else:
                send_json = \
                    _get_masto_api_v1account(base_dir, path_nickname, domain)
                send_json_str = \
                    'masto API account sent for ' + nickname + \
                    calling_info

    # NOTE: adding support for '/api/v1/directory seems to create
    # federation problems, so avoid implementing that

    if path.startswith('/api/v1/blocks'):
        send_json = []
        send_json_str = \
            'masto API instance blocks sent ' + path + calling_info
    elif path.startswith('/api/v1/favorites'):
        send_json = []
        send_json_str = 'masto API favorites sent ' + path + calling_info
    elif path.startswith('/api/v1/follow_requests'):
        send_json = []
        send_json_str = \
            'masto API follow requests sent ' + path + calling_info
    elif path.startswith('/api/v1/mutes'):
        send_json = []
        send_json_str = \
            'masto API mutes sent ' + path + calling_info
    elif path.startswith('/api/v1/notifications'):
        send_json = []
        send_json_str = \
            'masto API notifications sent ' + path + calling_info
    elif path.startswith('/api/v1/reports'):
        send_json = []
        send_json_str = 'masto API reports sent ' + path + calling_info
    elif path.startswith('/api/v1/statuses'):
        send_json = []
        send_json_str = 'masto API statuses sent ' + path + calling_info
    elif path.startswith('/api/v1/timelines'):
        send_json = {
            'error': 'This method requires an authenticated user'
        }
        send_json_str = 'masto API timelines sent ' + path + calling_info
    elif path.startswith('/api/v1/custom_emojis'):
        send_json = custom_emoji
        send_json_str = \
            'masto API custom emojis sent ' + path + calling_info

    admin_nickname = get_config_param(base_dir, 'admin')
    if admin_nickname and path == '/api/v1/instance':
        instance_description_short = \
            get_config_param(base_dir, 'instanceDescriptionShort')
        if not instance_description_short:
            instance_description_short = \
                translate['Yet another Epicyon Instance']
        instance_description = \
            get_config_param(base_dir, 'instanceDescription')
        instance_title = get_config_param(base_dir, 'instanceTitle')

        if calling_domain.endswith('.onion') and onion_domain:
            domain_full = onion_domain
            http_prefix = 'http'
        elif (calling_domain.endswith('.i2p') and i2p_domain):
            domain_full = i2p_domain
            http_prefix = 'http'

        if broch_mode:
            show_node_info_accounts = False

        send_json = \
            meta_data_instance(show_node_info_accounts,
                               instance_title,
                               instance_description_short,
                               instance_description,
                               http_prefix,
                               base_dir,
                               admin_nickname,
                               domain,
                               domain_full,
                               registration,
                               system_language,
                               project_version)
        send_json_str = 'masto API instance metadata sent ' + ua_str
    elif path.startswith('/api/v1/instance/peers'):
        # This is just a dummy result.
        # Showing the full list of peers would have privacy implications.
        # On a large instance you are somewhat lost in the crowd, but on
        # small instances a full list of peers would convey a lot of
        # information about the interests of a small number of accounts
        send_json = ['mastodon.social', domain_full]
        send_json_str = 'masto API peers metadata sent ' + ua_str
    elif path.startswith('/api/v1/instance/activity'):
        send_json = []
        send_json_str = 'masto API activity metadata sent ' + ua_str
    return send_json, send_json_str