Slixfeed/slixfeed/xmpp/ipc.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# print("Initiating IPC server...")
# print("Shutting down IPC server...")

"""
TODO Exchange socket fd and send a command to delete
socket (i.e. clients[fd]) from the respective client.
"""

import asyncio
import os
import slixfeed.config as config
from slixfeed.syndication import FeedTask
from slixfeed.xmpp.chat import XmppChatTask
from slixfeed.xmpp.commands import XmppCommands
from slixfeed.xmpp.chat import XmppChatAction
from slixfeed.xmpp.status import XmppStatusTask
import socket

class XmppIpcServer:

    """
    Inter-Process Communication interface of type Berkeley sockets.
    """

    async def ipc(self):

        ipc_socket_filename = '/tmp/slixfeed_xmpp.socket'

        # Setup socket
        if os.path.exists(ipc_socket_filename):
            os.remove(ipc_socket_filename)

        loop = asyncio.get_running_loop()

        sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
        sock.bind(ipc_socket_filename)
        sock.listen(0)

        # conn = None
        # clients = []
        # clients = {}

        # Start listening loop
        while True:
            # Accept 'request'
            conn, addr = await loop.sock_accept(sock)

            # # Terminate an old connection in favour of a new connection
            # if len(clients):
            #     for c in clients:
            #         print(c)
            #         c.close()
            #         del c
            # else:
            #     conn, addr = await loop.sock_accept(sock)
            #     clients.append(conn)
            #     print(clients)

            # Manage connections inside a dict
            # fd = conn.fileno()
            # clients[fd] = conn

            # datastream = await loop.sock_recv(conn, 1024)
            # if datastream.decode('utf-8') == 'identifier':
            #     await loop.sock_sendall(conn, fd.encode('utf-8'))

            print('A connection from client has been detected. '
                  'Slixfeed is waiting for commands.')
            # print('There are {} clients connected to the IPC '
            #       'interface'.format(len(clients)))
            # Process 'request'
            while True:
                response = None

                # print('Awaiting for a command')
                # print(clients[fd])

                datastream = await loop.sock_recv(conn, 1024)
                if not datastream:
                    break
                data = datastream.decode('utf-8')
                if '~' in data:
                    data_list = data.split('~')
                    jid_bare = data_list[0]
                    db_file = config.get_pathname_to_database(jid_bare)
                    command = data_list[1]
                else:
                    command = data
                match command:
                    case _ if command.startswith('add'):
                        command = command[4:]
                        url = command.split(' ')[0]
                        title = ' '.join(command.split(' ')[1:])
                        response = XmppCommands.feed_add(
                            url, db_file, jid_bare, title)
                    case _ if command.startswith('allow +'):
                            val = command[7:]
                            if val:
                                await XmppCommands.set_filter_allow(
                                    db_file, val, True)
                                response = ('Approved keywords\n'
                                            '```\n{}\n```'
                                            .format(val))
                            else:
                                response = ('No action has been taken.'
                                            '\n'
                                            'Missing keywords.')
                    case _ if command.startswith('allow -'):
                            val = command[7:]
                            if val:
                                await XmppCommands.set_filter_allow(
                                    db_file, val, False)
                                response = ('Approved keywords\n'
                                            '```\n{}\n```'
                                            .format(val))
                            else:
                                response = ('No action has been taken.'
                                            '\n'
                                            'Missing keywords.')
                    case _ if command.startswith('archive'):
                        val = command[8:]
                        response = await XmppCommands.set_archive(
                            self, jid_bare, val)
                    case _ if command.startswith('bookmark +'):
                        muc_jid = command[11:]
                        response = await XmppCommands.bookmark_add(
                            self, muc_jid)
                    case _ if command.startswith('bookmark -'):
                        muc_jid = command[11:]
                        response = await XmppCommands.bookmark_del(
                            self, muc_jid)
                    case 'bookmarks':
                        response = await XmppCommands.print_bookmarks(self)
                    case _ if command.startswith('clear'):
                        key = command[6:]
                        response = await XmppCommands.clear_filter(db_file, key)
                    case _ if command.startswith('default'):
                        key = command[8:]
                        response = await XmppCommands.restore_default(
                            self, jid_bare, key=None)
                    case 'defaults':
                        response = await XmppCommands.restore_default(self, jid_bare)
                    case _ if command.startswith('deny +'):
                            val = command[6:]
                            if val:
                                await XmppCommands.set_filter_allow(
                                    db_file, val, True)
                                response = ('Rejected keywords\n'
                                            '```\n{}\n```'
                                            .format(val))
                            else:
                                response = ('No action has been taken.'
                                            '\n'
                                            'Missing keywords.')
                    case _ if command.startswith('deny -'):
                            val = command[6:]
                            if val:
                                await XmppCommands.set_filter_allow(
                                    db_file, val, False)
                                response = ('Rejected keywords\n'
                                            '```\n{}\n```'
                                            .format(val))
                            else:
                                response = ('No action has been taken.'
                                            '\n'
                                            'Missing keywords.')
                    case _ if command.startswith('disable'):
                        response = await XmppCommands.feed_disable(
                            self, db_file, jid_bare, command)
                    case _ if command.startswith('enable'):
                        response = await XmppCommands.feed_enable(
                            self, db_file, command)
                    case _ if command.startswith('export'):
                        ext = command[7:]
                        if ext in ('md', 'opml'):
                            filename, result = XmppCommands.export_feeds(
                                self, jid_bare, ext)
                            response = result + ' : ' + filename
                        else:
                            response = 'Unsupported filetype.  Try: md or opml'
                    case _ if command.startswith('feeds'):
                        query = command[6:]
                        result, number = XmppCommands.list_feeds(db_file, query)
                        if number:
                            if query:
                                first_line = ('Subscriptions containing "{}":\n'
                                              .format(query))
                            else:
                                first_line = 'Subscriptions:\n'
                            response = (first_line + result +
                                        '\nTotal of {} feeds'.format(number))
                    case _ if (command.startswith('gemini:') or
                               command.startswith('gopher:')):
                        response = XmppCommands.fetch_gemini()
                    case 'help':
                        response = XmppCommands.print_help()
                    case 'help all':
                        response = XmppCommands.print_help_list()
                    case _ if (command.startswith('http') and
                               command.endswith('.opml')):
                        response = await XmppCommands.import_opml(
                            self, db_file, jid_bare, command)
                    case 'info':
                        response = XmppCommands.print_info_list()
                    case _ if command.startswith('info'):
                        entry = command[5:].lower()
                        response = XmppCommands.print_info_specific(entry)
                    case 'pubsub list':
                        response = await XmppCommands.pubsub_list(
                            self, jid_bare)
                    case _ if command.startswith('pubsub list'):
                        jid = command[12:]
                        response = 'List of nodes for {}:\n```\n'.format(jid)
                        response = await XmppCommands.pubsub_list(self, jid)
                        response += '```'
                    case _ if command.startswith('pubsub send'):
                        info = command[12:]
                        info = info.split(' ')
                        jid = info[0]
                        # num = int(info[1])
                        if jid:
                            response = XmppCommands.pubsub_send(self, info, jid)
                    # TODO Handle node error
                    # sqlite3.IntegrityError: UNIQUE constraint failed: feeds_pubsub.node
                    # ERROR:slixmpp.basexmpp:UNIQUE constraint failed: feeds_pubsub.node
                    case _ if (command.startswith('http') or
                               command.startswith('feed:/') or
                               command.startswith('itpc:/') or
                               command.startswith('rss:/')):
                        response = await XmppCommands.fetch_http(
                            self, command, db_file, jid_bare)
                    case _ if command.startswith('interval'):
                        val = command[9:]
                        if val:
                            response = await XmppCommands.set_interval(
                                self, db_file, jid_bare, val)
                            XmppChatTask.restart_task(self, jid_bare)
                        else:
                            response = 'Current value for interval: '
                            response += XmppCommands.get_interval(self, jid_bare)
                    case _ if command.startswith('join'):
                        muc_jid = command[5:]
                        response = await XmppCommands.muc_join(self, muc_jid)
                    case _ if command.startswith('length'):
                            val = command[7:]
                            if val:
                                response = await XmppCommands.set_length(
                                    self, db_file, jid_bare, val)
                            else:
                                response = 'Current value for length: '
                                response += XmppCommands.get_length(self, jid_bare)
                    case 'media off':
                        response = await XmppCommands.set_media_off(
                            self, jid_bare, db_file)
                    case 'media on':
                        response = await XmppCommands.set_media_on(
                            self, jid_bare, db_file)
                    case 'new':
                        response = await XmppCommands.set_old_off(
                            self, jid_bare, db_file)
                    case _ if command.startswith('next'):
                        num = command[5:]
                        await XmppChatAction.send_unread_items(self, jid_bare, num)
                    case _ if command.startswith('node delete'):
                        info = command[12:]
                        info = info.split(' ')
                        response = XmppCommands.node_delete(self, info)
                    case _ if command.startswith('node purge'):
                        info = command[11:]
                        info = info.split(' ')
                        response = XmppCommands.node_purge(self, info)
                    case 'old':
                        response = await XmppCommands.set_old_on(
                            self, jid_bare, db_file)
                    case 'options':
                        response = 'Options:\n```'
                        response += XmppCommands.print_options(self, jid_bare)
                        response += '\n```'
                    case _ if command.startswith('quantum'):
                        val = command[8:]
                        if val:
                            response = await XmppCommands.set_quantum(
                                self, db_file, jid_bare, val)
                        else:
                            response = 'Quantum: '
                            response += XmppCommands.get_quantum(
                                self, jid_bare)
                    case 'random':
                        response = XmppCommands.set_random(self, jid_bare, db_file)
                    case _ if command.startswith('read'):
                        data = command[5:]
                        data = data.split()
                        url = data[0]
                        if url:
                            response = await XmppCommands.feed_read(
                                self, jid_bare, data, url)
                        else:
                            response = ('No action has been taken.'
                                        '\n'
                                        'Missing URL.')
                    case _ if command.startswith('recent'):
                        num = command[7:]
                        if not num: num = 5
                        count, result = XmppCommands.print_recent(
                            self, db_file, num)
                        if count:
                            response = 'Recent {} fetched titles:\n'.format(num)
                            response += result
                        else:
                            response = result
                    case _ if command.startswith('remove'):
                        ix_url = command[7:]
                        ix_url = ix_url.split(' ')
                        response = await XmppCommands.feed_remove(
                            self, jid_bare, db_file, ix_url)
                    case _ if command.startswith('rename'):
                        response = await XmppCommands.feed_rename(
                            self, db_file, jid_bare, command)
                    case _ if command.startswith('reset'):
                        ix_url = command[6:]
                        ix_url = ix_url.split(' ')
                        response = await XmppCommands.mark_as_read(
                            jid_bare, db_file, ix_url)
                    case _ if command.startswith('search'):
                        query = command[7:]
                        response = XmppCommands.search_items(db_file, query)
                    case 'start':
                        tasks = (FeedTask, XmppChatTask, XmppStatusTask)
                        response = await XmppCommands.scheduler_start(
                            self, db_file, jid_bare, tasks)
                    case 'stats':
                        response = XmppCommands.print_statistics(db_file)
                    case 'stop':
                        response = await XmppCommands.scheduler_stop(
                            self, db_file, jid_bare)
                    case 'support':
                        response = XmppCommands.print_support_jid()
                    case 'version':
                        response = XmppCommands.print_version(self, jid_bare)
                    case _ if command.startswith('xmpp:'):
                        response = await XmppCommands.muc_join(self, command)
                    case _ if command.startswith('xmpp:'):
                        response = await XmppCommands.muc_join(self, command)
                    case 'exit':
                        conn.close()
                        break
                    case _:
                        response = XmppCommands.print_unknown()
                # Send 'response'
                await loop.sock_sendall(conn, response.encode('utf-8'))