newsreel.py

#!/usr/bin/python3

import re

import ttxpage
import ttxutils
import config
_config=config.Config().config

class _Singleton(type):
    """
    Define an Instance operation that lets clients access its unique
    instance.
    """

    def __init__(cls, name, bases, attrs, **kwargs):
        super().__init__(name, bases, attrs)
        cls._instance = None

    def __call__(cls, *args, **kwargs):
        if cls._instance is None:
            cls._instance = super().__call__(*args, **kwargs)
        return cls._instance

class Newsreel(metaclass=_Singleton):
    def __init__(self):
        self.pages = []

    def clear(self):
        self.pages.clear()
        self.add_in_vision()

    def add_in_vision(self):
        d = ttxutils.decode
        lines = [
            (2, d("␄␝␇␍        YOU ARE WATCHING")),
            (4, d("␄␝␇␍ITEMS OF NEWS AND INFORMATION FROM")),
            (7, d("␄␝␓ ||||||,,l   ,<,l   ,<,l             ")),
            (8,d("␄␝␓ ␡␡␡␡␡␡ ␡␡j#s55b␡j#s55bjj#7k␡␡␡␡␡␡   ")),
            (9,d("␄␝␓ //////,,.j .5-,.j ~5-..j!4k␡␡␡␡␡␡   ")),
            (10,d('␄␝␓         "###!  "###!  "##########   ')),
            (11,d("␄␝␃␍    THE BBC'S TELETEXT SERVICE")),
            (14,d("␄␝␇␍ The full service offers several")),
            (16,d("␄␝␇␍hundred pages and is available to")),
            (18,d("␄␝␇␍ anyone with a suitably-equipped")),
            (20,d("␄␝␇␍         television set.")),
            (22,d("␄␝"))
        ]
        self.pages.append(lines)

    def add_weather(self):
        d = ttxutils.decode
        lines = [
            "   ␄␝                                 ␜ ",
            "␁␝␃␍WEATHER FORECAST follows in a moment",
            "                                        ",
            "   ␔␝␖      p                         ␜ ",
            "   ␔␝␖     ␡␡␡                        ␜ ",
            "   ␔␝    ␖␡␞␡␜␔+␡␡␡␡␡␡␡␡␡␡'  +␡␝      ␜ ",
            "   ␔␝   ␖␡␡␞␡␜␡␔*␡␡␡␡␡␡␡␡%    *␡␝     ␜ ",
            "   ␔␡␡␡␡␡␡␑j    ␔*␡␡␡␡␡␡%      *␡␡␝   ␜ ",
            "   ␔␡␡␡␡␡'␑j     ␔*␡␡␡␡'        *␝    ␜ ",
            "   ␔␡␡␡␡␡␑ j␓`p  ␔ ␡␡␡␡  ␒ */  ␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡␑*.␓7k5 ␔ ␡␡␡␡  ␒ ##! ␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡␒ u␓%j% ␔ ␡␡␡␡  ␓x40|0␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒+o|x~5␔ ␡␡␡␡  ␓␡5 ␡5␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒  k␡!5␔ ␡␡␡␡ ␓ ␡␡j55␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒ h␡␡} ␔ ␡␡␡␡ ␓j7␡~55␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒ ␡}}␡5␔ ␡␡␡␡ ␓4!␡~55␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒ ␡}}␡5␔ ␡␡␡␡ ␗5 ||4h␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒ ␡}}␡5␔ ␡␡␡␡ ␗5 ␡k5 ␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒ ␡}}␡5␔ ␡␡␡␡ ␗5 ␡j5 ␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␒bfffff␔ ␡␡␡␡ ␗5 ␡j5 ␔ ␝    ␜ ",
            "   ␔␡␡␡␡␡ ␖ `z5␡0␔ ␡␡␡␡ ␗5psbq0␔ ␝    ␜ ",
            "   ␔␡␡␡␡ ␑␡␡␡␡␡␡␡␔ ␡␡␡␡ ␑␡␡␡␡␡␡␡␔ ␝   ␜ ",
            "   ␔␝  ␜ ␝  0     ␜ ␝ ␜ ␝        ␜ ␝  ␜ ",
        ]
        line = 1
        page = []
        for l in lines:
            page.append((line, ttxutils.decode(l)))
            line += 1
        self.pages.append(page)

    def add(self, lines):
        page = []
        pat = re.compile(r"OL,(\d+),(.*)")
        for l in lines:
            if l.startswith("PN"):
                if page:
                    self.pages.append(page)
                    page = []
            s = pat.match(l)
            if s:
                if int(s[1]) > 0 and int(s[1]) < 24:
                    line = s[2]
                    line = re.sub("( |\x1b[A-Z])\d{1,2}/\d{1,2}\s*$",
                                  "", line, count=1)
                    page.append((s[1],line))
        if page:
            self.pages.append(page)

    def save(self):
        pagenum = _config["newsreel"]["page"]
        duration = _config["newsreel"]["duration"]
        d = ttxutils.decode

        page = ttxpage.TeletextPage("Newsreel", pagenum, time=duration)
        subpage = 1
        for p in self.pages:
            page.header(pagenum, subpage, status=0xc000)
            for l in p:
                page.addline(l[0], l[1])
            page.addline(24,
                         d("€ANext News €BLocalNews €CSport  €FMain Menu"))
            page.addfasttext(0x154, 0x160, 0x300, 0x100, 0x8ff, 0x199)
            subpage += 1
        page.save()