kiosk.py

   1 #!/usr/bin/env python3
   2
   3 import collections
   4 from datetime import datetime
   5 from difflib import SequenceMatcher
   6 import gc
   7 import logging
   8 import os
   9 import re
  10 from threading import Thread
  11 import time
  12 import tracemalloc
  13 from typing import Dict, List, Optional
  14 from queue import Queue
  15
  16 import astral  # type: ignore
  17 from astral.sun import sun  # type: ignore
  18 import numpy as np
  19 import pvporcupine
  20 import pytz
  21
  22 from pyutils import (
  23     bootstrap,
  24     config,
  25 )
  26 from pyutils.datetimes import datetime_utils
  27 from pyutils.files import file_utils
  28
  29 import kiosk_constants
  30 import file_writer
  31 import renderer_catalog
  32 import chooser
  33 import listen
  34 import trigger_catalog
  35
  36
  37 cfg = config.add_commandline_args(
  38     f'Kiosk Server ({__file__})',
  39     'A python server that runs a kiosk.'
  40 )
  41 logger = logging.getLogger(__file__)
  42
  43
  44 def thread_janitor() -> None:
  45     tracemalloc.start()
  46     tracemalloc_target = 0.0
  47     gc_target = 0.0
  48     gc.enable()
  49
  50     # Main janitor loop; dump the largest pigs and force regular gcs.
  51     while True:
  52         now = time.time()
  53         if now > tracemalloc_target:
  54             tracemalloc_target = now + 30.0
  55             snapshot = tracemalloc.take_snapshot()
  56             snapshot = snapshot.filter_traces((
  57                 tracemalloc.Filter(False, "<frozen importlib._bootstrap>"),
  58                 tracemalloc.Filter(False, "<unknown>"),
  59             ))
  60             key_type = 'lineno'
  61             limit = 10
  62             top_stats = snapshot.statistics(key_type)
  63             logger.info(f'janitor: Top {limit} lines')
  64             for index, stat in enumerate(top_stats[:limit], 1):
  65                 frame = stat.traceback[0]
  66
  67                 # replace "/path/to/module/file.py" with "module/file.py"
  68                 filename = os.sep.join(frame.filename.split(os.sep)[-2:])
  69                 logger.info(
  70                     f'janitor: #{index}: {filename}:{frame.lineno}: {stat.size / 1024:.1f} KiB'
  71                 )
  72
  73             other = top_stats[limit:]
  74             if other:
  75                 size = sum(stat.size for stat in other)
  76                 logger.info(
  77                     f'janitor: {len(other)} others: {size/1024:.1f} KiB'
  78                 )
  79             total = sum(stat.size for stat in top_stats)
  80             logger.info(
  81                 f'janitor: Total allocated size: {total / 1024:.1f} KiB'
  82             )
  83         if now > gc_target:
  84             logger.info('janitor: kicking off a manual gc operation now.')
  85             gc.collect()
  86             gc_target = now + 120.0
  87         time.sleep(30.0)
  88
  89
  90 def guess_page(command: str, page_chooser: chooser.chooser) -> str:
  91
  92     def normalize_page(page: str) -> str:
  93         logger.debug(f'normalize_page input: {page}')
  94         page = page.replace('(', ' ')
  95         page = page.replace('_', ' ')
  96         page = page.replace(')', ' ')
  97         page = page.replace('.html', '')
  98         page = page.replace('CNNNews', 'news')
  99         page = page.replace('CNNTechnology', 'technology')
 100         page = page.replace('gocostco', 'costco list')
 101         page = page.replace('gohardware', 'hardware list')
 102         page = page.replace('gohouse', 'house list honey do')
 103         page = page.replace('gcal', 'google calendar events')
 104         page = page.replace('mynorthwest', 'northwest news')
 105         page = page.replace('myq', 'myq garage door status')
 106         page = page.replace('gomenu', 'dinner menu')
 107         page = page.replace('gmaps-seattle-unwrapped', 'traffic')
 108         page = page.replace('gomenu', 'dinner menu')
 109         page = page.replace('WSJNews', 'news')
 110         page = page.replace('telma', 'telma cabin')
 111         page = page.replace('WSJBusiness', 'business news')
 112         page = re.sub(r'[0-9]+', '', page)
 113         logger.debug(f'normalize_page output: {page}')
 114         return page
 115
 116     logger.info(f'No exact match for f{command}; trying to guess...')
 117     best_page = None
 118     best_score = None
 119     for page in page_chooser.get_page_list():
 120         npage = normalize_page(page)
 121         score = SequenceMatcher(None, command, npage).ratio()
 122         if best_score is None or score > best_score:
 123             best_page = page
 124             best_score = score
 125     assert best_page is not None
 126     logger.info(f'Best guess for f{command} => {best_page} (score = {best_score})')
 127     return best_page
 128
 129
 130 def process_command(command: str, page_history: List[str], page_chooser) -> str:
 131     command = command.lower()
 132     logger.info(f'Parsing verbal command: {command}')
 133     page = None
 134     if 'hold' in command:
 135         page = page_history[0]
 136     elif 'back' in command:
 137         page = page_history[1]
 138     elif 'skip' in command:
 139         while True:
 140             (page, _) = page_chooser.choose_next_page()
 141             if page == page_history[0]:
 142                 logger.debug(f'chooser: {page} is the same as last time!  Try again.')
 143             else:
 144                 break
 145     elif 'internal' in command:
 146         if 'render' in command:
 147             page = kiosk_constants.render_stats_pagename
 148         else:
 149             page = kiosk_constants.render_stats_pagename
 150     elif 'weather' in command:
 151         if 'telma' in command or 'cabin' in command:
 152             page = 'weather-telma_3_10800.html'
 153         elif 'stevens' in command:
 154             page = 'weather-stevens_3_10800.html'
 155         else:
 156             page = 'weather-home_3_10800.html'
 157     elif 'cabin' in command:
 158         if 'list' in command:
 159             page = 'Cabin-(gocabin)_2_3600.html'
 160         else:
 161             page = 'hidden/cabin_driveway.html'
 162     elif 'news' in command or 'headlines' in command:
 163         page = 'cnn-CNNNews_4_25900.html'
 164     elif 'clock' in command or 'time' in command:
 165         page = 'clock_10_none.html'
 166     elif 'countdown' in command or 'countdowns' in command:
 167         page = 'countdown_3_7200.html'
 168     elif 'costco' in command:
 169         page = 'Costco-(gocostco)_2_3600.html'
 170     elif 'calendar' in command or 'events' in command:
 171         page = 'gcal_3_86400.html'
 172     elif 'countdown' in command or 'countdowns' in command:
 173         page = 'countdown_3_7200.html'
 174     elif 'grocery' in command or 'groceries' in command:
 175         page = 'Grocery-(gogrocery)_2_3600.html'
 176     elif 'hardware' in command:
 177         page = 'Hardware-(gohardware)_2_3600.html'
 178     elif 'garage' in command:
 179         page = 'myq_4_300.html'
 180     elif 'menu' in command:
 181         page = 'Menu-(gomenu)_2_3600.html'
 182     elif 'cron' in command or 'health' in command:
 183         page = 'periodic-health_6_300.html'
 184     elif 'photo' in command or 'picture' in command:
 185         page = 'photo_23_3600.html'
 186     elif 'quote' in command or 'quotation' in command or 'quotes' in command:
 187         page = 'quotes_4_10800.html'
 188     elif 'stevens' in command:
 189         page = 'stevens-conditions_1_86400.html'
 190     elif 'stock' in command or 'stocks' in command:
 191         page = 'stock_3_86400.html'
 192     elif 'twitter' in command:
 193         page = 'twitter_10_3600.html'
 194     elif 'traffic' in command:
 195         page = 'gmaps-seattle-unwrapped_5_none.html'
 196     elif 'front' in command and 'door' in command:
 197         page = 'hidden/frontdoor.html'
 198     elif 'driveway' in command:
 199         page = 'hidden/driveway.html'
 200     elif 'backyard' in command:
 201         page = 'hidden/backyard.html'
 202     else:
 203         page = guess_page(command, page_chooser)
 204     assert page is not None
 205     logger.info(f'Parsed to {page}')
 206     return page
 207
 208
 209 def thread_change_current(command_queue: Queue) -> None:
 210     page_history = ["", ""]
 211     swap_page_target = 0.0
 212
 213     def filter_news_during_dinnertime(page: str) -> bool:
 214         now = datetime.now(tz=pytz.timezone("US/Pacific"))
 215         is_dinnertime = now.hour >= 18 and now.hour <= 20
 216         return not is_dinnertime or not (
 217             "cnn" in page
 218             or "news" in page
 219             or "mynorthwest" in page
 220             or "seattle" in page
 221             or "wsj" in page
 222         )
 223
 224     page_chooser = chooser.weighted_random_chooser_with_triggers(
 225         trigger_catalog.get_triggers(), [filter_news_during_dinnertime]
 226     )
 227     current_file = os.path.join(kiosk_constants.pages_dir, "current.shtml")
 228     emergency_file = os.path.join(kiosk_constants.pages_dir, "reload_immediately.html")
 229
 230     # Main chooser loop
 231     while True:
 232         now = time.time()
 233
 234         # Check for a verbal command.
 235         command = None
 236         try:
 237             command = command_queue.get(block=False)
 238         except Exception:
 239             command = None
 240
 241         if command is not None:
 242             logger.info(f'chooser: We got a verbal command ("{command}"), parsing it...')
 243             triggered = True
 244             page = process_command(command, page_history, page_chooser)
 245         else:
 246             while True:
 247                 (page, triggered) = page_chooser.choose_next_page()
 248                 if triggered:
 249                     logger.info('chooser: A trigger is active...')
 250                     break
 251                 else:
 252                     if page == page_history[0]:
 253                         logger.debug(f'chooser: {page} is the same as last time! Try again.')
 254                     else:
 255                         break
 256
 257         if triggered:
 258             if page != page_history[0] or (swap_page_target - now) < 10.0:
 259                 logger.info(f'chooser: An emergency page reload to {page} is needed at this time.')
 260                 swap_page_target = now + kiosk_constants.emergency_refresh_period_sec
 261
 262                 # Set current.shtml to the right page.
 263                 try:
 264                     with open(current_file, "w") as f:
 265                         emit(
 266                             f,
 267                             page,
 268                             override_refresh_sec = kiosk_constants.emergency_refresh_period_sec,
 269                             command = command
 270                         )
 271                     logger.debug(f'chooser: Wrote {current_file}.')
 272                 except Exception as e:
 273                     logger.exception(e)
 274                     logger.error(f'chooser: Unexpected exception; assuming {page} doesn\'t exist?!')
 275                     continue
 276
 277                 # Also notify XMLHTTP clients that they need to refresh now.
 278                 with open(emergency_file, "w") as f:
 279                     f.write(f'Reload, suckers... you HAVE to see {page}!')
 280                 logger.debug(f'chooser: Wrote {emergency_file}...')
 281
 282                 # Fix this hack... maybe read the webserver logs and see if it
 283                 # actually was picked up?
 284                 time.sleep(0.999)
 285                 os.remove(emergency_file)
 286                 logger.debug(f'chooser: ...and removed {emergency_file}.')
 287
 288         elif now >= swap_page_target:
 289             assert page != page_history[0]
 290             logger.info(
 291                 f'chooser: Nominal choice of {page} as the next to show.'
 292             )
 293             swap_page_target = now + kiosk_constants.refresh_period_sec
 294             try:
 295                 with open(current_file, "w") as f:
 296                     emit(f, page)
 297                 logger.debug(f'chooser: Wrote {current_file}.')
 298             except Exception as e:
 299                 logger.exception(e)
 300                 logger.error(f'chooser: Unexpected exception; assuming {page} doesn\'t exist?!')
 301                 continue
 302         page_history.insert(0, page)
 303         page_history = page_history[0:10]
 304         time.sleep(0.5)
 305
 306
 307 def emit(f,
 308          filename: str,
 309          *,
 310          override_refresh_sec: int = None,
 311          command: str = None):
 312     if 'unwrapped' not in filename:
 313         logger.debug(f'Emitting {filename} wrapped.')
 314         emit_wrapped(f, filename, override_refresh_sec=override_refresh_sec, command=command)
 315     else:
 316         logger.debug(f'Emitting {filename} raw.')
 317         emit_raw(f, filename)
 318
 319
 320 def emit_raw(f, filename: str):
 321     f.write(f'<!--#include virtual="{filename}"-->')
 322
 323
 324 def emit_wrapped(f,
 325                  filename: str,
 326                  *,
 327                  override_refresh_sec: int = None,
 328                  command: str = None) -> None:
 329
 330     def pick_background_color() -> str:
 331         now = datetime_utils.now_pacific()
 332         city = astral.LocationInfo(
 333             "Bellevue", "USA", "US/Pacific", 47.610, -122.201
 334         )
 335         s = sun(city.observer, date=now, tzinfo=pytz.timezone("US/Pacific"))
 336         sunrise_mod = datetime_utils.minute_number(s["sunrise"].hour, s["sunrise"].minute)
 337         sunset_mod = datetime_utils.minute_number(s["sunset"].hour, s["sunset"].minute)
 338         now_mod = datetime_utils.minute_number(now.hour, now.minute)
 339         if now_mod < sunrise_mod or now_mod > (sunset_mod + 45):
 340             return "E6B8B8"
 341         elif now_mod < (sunrise_mod + 45) or now_mod > (sunset_mod + 120):
 342             return "EECDCD"
 343         else:
 344             return "FFFFFF"
 345
 346     def get_refresh_period() -> float:
 347         if override_refresh_sec is not None:
 348             return float(override_refresh_sec * 1000.0)
 349         now = datetime.now(tz=pytz.timezone("US/Pacific"))
 350         if now.hour < 6:
 351             return float(kiosk_constants.refresh_period_night_sec * 1000.0)
 352         else:
 353             return float(kiosk_constants.refresh_period_sec * 1000.0)
 354
 355     age = file_utils.describe_file_ctime(f"pages/{filename}")
 356     bgcolor = pick_background_color()
 357     if command is None:
 358         pageid = filename
 359     else:
 360         pageid = f'"{command}" -> {filename}'
 361
 362     f.write(
 363 """
 364 <HEAD>
 365   <TITLE>Kitchen Kiosk</TITLE>
 366   <LINK rel="stylesheet" type="text/css" href="style.css">
 367   <meta name="google" content="notranslate">
 368   <SCRIPT TYPE="text/javascript">
 369
 370   // Zoom the 'contents' div to fit without scrollbars and then make
 371   // it visible.
 372   function zoomScreen() {
 373     z = 285;
 374     do {
 375       document.getElementById("content").style.zoom = z+"%";
 376       var body = document.body;
 377       var html = document.documentElement;
 378       var height = Math.max(body.scrollHeight,
 379                             body.offsetHeight,
 380                             html.clientHeight,
 381                             html.scrollHeight,
 382                             html.offsetHeight);
 383       var windowHeight = window.innerHeight;
 384       var width = Math.max(body.scrollWidth,
 385                            body.offsetWidth,
 386                            html.clientWidth,
 387                            html.scrollWidth,
 388                            html.offsetWidth);
 389       var windowWidth = window.innerWidth;
 390       var heightRatio = height / windowHeight;
 391       var widthRatio = width / windowWidth;
 392
 393       if (heightRatio <= 1.0 && widthRatio <= 1.0) {
 394         break;
 395       }
 396       z -= 4;
 397     } while(z >= 70);
 398     document.getElementById("content").style.visibility = "visible";
 399   }
 400
 401   // Load IMG tags with DATA-SRC attributes late.
 402   function lateLoadImages() {
 403     var image = document.getElementsByTagName('img');
 404     for (var i = 0; i < image.length; i++) {
 405       if (image[i].getAttribute('DATA-SRC')) {
 406         image[i].setAttribute('SRC', image[i].getAttribute('DATA-SRC'));
 407       }
 408     }
 409   }
 410 """
 411     )
 412     f.write(
 413 """
 414   // Operate the clock at the top of the page.
 415   function runClock() {
 416     var today = new Date();
 417     var h = today.getHours();
 418     var ampm = h >= 12 ? 'pm' : 'am';
 419     h = h %% 12;
 420     h = h ? h : 12; // the hour '0' should be '12'
 421     var m = maybeAddZero(today.getMinutes());
 422     var colon = ":";
 423     if (today.getSeconds() %% 2 == 0) {
 424       colon = "<FONT STYLE='color: #%s; font-size: 4vmin; font-weight: bold'>:</FONT>";
 425     }
 426     document.getElementById("time").innerHTML = h + colon + m + ampm;
 427     document.getElementById("date").innerHTML = today.toDateString();
 428     var t = setTimeout(function(){runClock()}, 1000);
 429   }
 430 """ % bgcolor
 431     )
 432     f.write(
 433 """
 434   // Helper method for running the clock.
 435   function maybeAddZero(x) {
 436     return (x < 10) ? "0" + x : x;
 437   }
 438
 439   // Do something on page load.
 440   function addLoadEvent(func) {
 441     var oldonload = window.onload;
 442     if (typeof window.onload != 'function') {
 443       window.onload = func;
 444     } else {
 445       window.onload = function() {
 446         if (oldonload) {
 447           oldonload();
 448         }
 449         func();
 450       }
 451     }
 452   }
 453
 454   // Sleep thread helper.
 455   const sleep = (milliseconds) => {
 456     return new Promise(resolve => setTimeout(resolve, milliseconds))
 457   }
 458
 459   var loadedDate = new Date();
 460
 461   addLoadEvent(zoomScreen);
 462   addLoadEvent(runClock);
 463   addLoadEvent(lateLoadImages);
 464 """
 465     )
 466     f.write(
 467 """
 468   // Runs the countdown line at the bottom and is responsible for
 469   // normal page reloads caused by the expiration of a timer.
 470   (function countdown() {
 471     setTimeout(
 472       function() {
 473         var now = new Date();
 474         var deltaMs = now.getTime() - loadedDate.getTime();
 475         var totalMs = %d;
 476         var remainingMs = (totalMs - deltaMs);
 477
 478         if (remainingMs > 0) {
 479           var hr = document.getElementById("countdown");
 480           var width = (remainingMs / (totalMs - 5000)) * 100.0;
 481           if (width <= 100) {
 482             hr.style.visibility = "visible";
 483             hr.style.width = " ".concat(width, "%%");
 484             hr.style.backgroundColor = "maroon";
 485           }
 486         } else {
 487           // Reload unconditionally after 22 sec.
 488           window.location.reload(true);
 489         }
 490
 491         // Brief sleep before doing it all over again.
 492         sleep(50).then(() => {
 493           countdown();
 494         });
 495       }, 50)
 496   })();
 497 """ % get_refresh_period()
 498     )
 499     f.write(
 500 """
 501   function check_reload() {
 502     var xhr = new XMLHttpRequest();
 503     xhr.open('GET',
 504              '%s/reload_immediately.html');
 505     xhr.onload =
 506       function() {
 507         if (xhr.status === 200) {
 508           window.location.reload(true);
 509         }
 510       };
 511     xhr.send();
 512   }
 513
 514   // Periodically checks for emergency reload events.
 515   setInterval(check_reload, 500);
 516   </SCRIPT>
 517 </HEAD>
 518 """ % kiosk_constants.root_url)
 519     f.write(f'<BODY BGCOLOR="#{bgcolor}">')
 520     f.write(
 521 """
 522     <TABLE style="height:100%; width:100%" BORDER=0>
 523     <TR HEIGHT=30>
 524         <TD ALIGN="left">
 525             <DIV id="date">&nbsp;</DIV>
 526         </TD>
 527         <TD ALIGN="center"><FONT COLOR=#bbbbbb>
 528             <DIV id="info"></DIV></FONT>
 529         </TD>
 530         <TD ALIGN="right">
 531             <DIV id="time">&nbsp;</DIV>
 532         </TD>
 533     </TR>
 534     <TR STYLE="vertical-align:top">
 535         <TD COLSPAN=3>
 536             <DIV ID="content" STYLE="zoom: 1; visibility: hidden;">
 537               <!-- BEGIN main page contents. -->
 538 """
 539     )
 540     f.write(f'<!--#include virtual="{filename}"-->')
 541     f.write(
 542 """
 543             <!-- END main page contents. -->
 544             </DIV>
 545             <BR>
 546             <DIV STYLE="position: absolute; top:1030px; width:99%">
 547             <P ALIGN="right">
 548 """
 549     )
 550     f.write(f'<FONT SIZE=2 COLOR=#bbbbbb>{pageid} @ {age} ago.</FONT>')
 551     f.write(
 552 """
 553             </P>
 554             <HR id="countdown" STYLE="width:0px;
 555                                       text-align:left;
 556                                       margin:0;
 557                                       border:none;
 558                                       border-width:0;
 559                                       height:5px;
 560                                       visibility:hidden;
 561                                       background-color:#ffffff;">
 562             </DIV>
 563         </TD>
 564     </TR>
 565     </TABLE>
 566 </BODY>"""
 567     )
 568
 569
 570 def renderer_update_internal_stats_page(
 571         last_render: Dict[str, datetime],
 572         render_counts: collections.Counter,
 573         render_times: Dict[str, np.array],
 574 ) -> None:
 575     logger.info(
 576         'renderer: Updating internal render statistics page.'
 577     )
 578     with file_writer.file_writer(kiosk_constants.render_stats_pagename) as f:
 579         f.write(
 580 '''
 581 <CENTER>
 582 <TABLE BORDER=0 WIDTH=95%>
 583     <TR>
 584     <TH><B>Renderer Name</B></TH>
 585     <TH><B>Last Run</B></TH>
 586     <TH><B>Num Invocations</B></TH>
 587     <TH><B>Render Latency</B></TH>
 588     </TR>
 589 ''')
 590         for n, r in enumerate(renderer_catalog.get_renderers()):
 591             if n % 2 == 0:
 592                 style = 'style="margin: 0; padding: 0; background: #c6b0b0;"'
 593             else:
 594                 style = 'style="margin: 0; padding: 0; background: #eeeeee;"'
 595             name = r.get_name()
 596             last = last_render.get(name, None)
 597             if last is None:
 598                 last = 'never'
 599             else:
 600                 last = last.strftime('%Y/%m/%d %I:%M:%S%P')
 601             count = render_counts.get(name, 0)
 602             latency = render_times.get(name, np.array([]))
 603             p25 = p50 = p75 = p90 = p99 = 'N/A'
 604             try:
 605                 p25 = np.percentile(latency, 25)
 606                 p50 = np.percentile(latency, 50)
 607                 p75 = np.percentile(latency, 75)
 608                 p90 = np.percentile(latency, 90)
 609                 p99 = np.percentile(latency, 99)
 610                 f.write(
 611 f'''
 612     <TR>
 613     <TD {style}>{name}&nbsp;</TD>
 614     <TD {style}>&nbsp;{last}&nbsp;</TD>
 615     <TD {style}><CENTER>&nbsp;{count}&nbsp;</CENTER></TD>
 616     <TD {style}>&nbsp;p25={p25:5.2f}, p50={p50:5.2f}, p75={p75:5.2f}, p90={p90:5.2f}, p99={p99:5.2f}</TD>
 617     </TR>
 618 '''
 619                 )
 620             except IndexError:
 621                 pass
 622         f.write('</TABLE>')
 623
 624
 625 def thread_invoke_renderers() -> None:
 626     render_times: Dict[str, np.array] = {}
 627     render_counts: collections.Counter = collections.Counter()
 628     last_render: Dict[str, datetime] = {}
 629
 630     # Touch the internal render page now to signal that we're alive.
 631     renderer_update_internal_stats_page(last_render, render_counts, render_times)
 632
 633     # Main renderer loop
 634     while True:
 635         logger.info(
 636             'renderer: invoking all overdue renderers in catalog...'
 637         )
 638         for r in renderer_catalog.get_renderers():
 639             name = r.get_name()
 640             now = time.time()
 641             logger.info(f'renderer: Invoking {name}\'s render method.')
 642             try:
 643                 r.render()
 644             except Exception as e:
 645                 logger.exception(e)
 646                 logger.error(
 647                     f'renderer: Unexpected and unhandled exception ({e}) in {name}, swallowing it.'
 648                 )
 649                 continue
 650
 651             # Increment the count of render operations per renderer.
 652             render_counts[name] += 1
 653
 654             # Keep track of the last time we invoked each renderer.
 655             last_render[name] = datetime_utils.now_pacific()
 656
 657             # Record how long each render operation takes and warn if very long.
 658             delta = time.time() - now
 659             times = render_times.get(name, np.array([]))
 660             times = np.insert(times, 0, delta)
 661             render_times[name] = times
 662             if delta > 1.0:
 663                 hdr = 'renderer: '
 664                 logger.warning(
 665 f'''
 666 {hdr} Warning: {name}'s rendering took {delta:5.2f}s.
 667 {hdr} FYI: {name}'s render times: p25={np.percentile(times, 25):5.2f}, p50={np.percentile(times, 50):5.2f}, p75={np.percentile(times, 75):5.2f}, p90={np.percentile(times, 90):5.2f}, p99={np.percentile(times, 99):5.2f}
 668 '''
 669                 )
 670
 671         # Update a page about internal stats of renderers.
 672         renderer_update_internal_stats_page(last_render, render_counts, render_times)
 673         logger.info('renderer: having a little nap...')
 674         time.sleep(kiosk_constants.render_period_sec)
 675
 676
 677 @bootstrap.initialize
 678 def main() -> None:
 679     command_queue: Queue = Queue()
 680     changer_thread: Optional[Thread] = None
 681     renderer_thread: Optional[Thread] = None
 682     janitor_thread: Optional[Thread] = None
 683     hotword_thread: Optional[Thread] = None
 684     while True:
 685         if hotword_thread is None or not hotword_thread.is_alive():
 686             if hotword_thread is None:
 687                 logger.info('watchdog: Starting up the hotword detector thread...')
 688             else:
 689                 logger.warning(
 690                     'watchdog: The hotword detector thread seems to have died; restarting it and hoping for the best.'
 691                 )
 692             keyword_paths = [pvporcupine.KEYWORD_PATHS[x] for x in ["bumblebee"]]
 693             sensitivities = [0.7] * len(keyword_paths)
 694             listener = listen.HotwordListener(
 695                 command_queue,
 696                 keyword_paths,
 697                 sensitivities,
 698             )
 699             hotword_thread = Thread(target=listener.listen_forever, args=())
 700             hotword_thread.start()
 701
 702         if changer_thread is None or not changer_thread.is_alive():
 703             if changer_thread is None:
 704                 logger.info('watchdog: Starting up the current page changer thread...')
 705             else:
 706                 logger.warning(
 707                     'watchdog: The current page changer thread seems to have died; restarting it and hoping for the best.'
 708                 )
 709             changer_thread = Thread(target=thread_change_current, args=(command_queue,))
 710             changer_thread.start()
 711
 712         if renderer_thread is None or not renderer_thread.is_alive():
 713             if renderer_thread is None:
 714                 logger.info('watchdog: Starting up the page renderer thread...')
 715             else:
 716                 logger.warning(
 717                     'watchdog: The page renderer thread seems to have died; restarting it and hoping for the best.'
 718                 )
 719             renderer_thread = Thread(target=thread_invoke_renderers, args=())
 720             renderer_thread.start()
 721
 722         if janitor_thread is None or not janitor_thread.is_alive():
 723             if janitor_thread is None:
 724                 logger.info('watchdog: Starting up the memory janitor thread...')
 725             else:
 726                 logger.warning(
 727                     'watchdog: The memory janitor thread seems to have died; restarting it and hoping for the best.'
 728                 )
 729             janitor_thread = Thread(target=thread_janitor, args=())
 730             janitor_thread.start()
 731
 732         # Have a little break and then check to make sure all threads are still alive.
 733         logger.debug('watchdog: having a little nap.')
 734         time.sleep(kiosk_constants.check_threads_period_sec)
 735
 736
 737 if __name__ == "__main__":
 738     main()