Just PHP FUN 104.

just_php_fun_104.md

Just PHP FUN 104.

• https://www.codewars.com/kata/5e454bf176551c002ee36486 Apply offset to subtitles.

Started at 22:01 16.09.2020 Wednesday Sep.
Finished at 22:59 16.09.2020 Wednesday Sep. (0hrs 58minutes)

subs_offset_apply.php

<?php
# https://www.codewars.com/kata/5e454bf176551c002ee36486 Apply offset to subtitles.
function subs_offset_apply($string, $offset){
  $s = 1000; $m = $s * 60; $h = $m * 60; $n = "Invalid offset";
  echo "$string \n $offset \n";
  
  $to_ms = function($hrs,$mins,$scnds,$mscnds) use ($s, $m, $h){
    return $hrs*$h + $mins * $m + $scnds * $s + $mscnds;
  };
  $to_time = function($mscnds) use ($s, $m, $h){
    $answer = [];
    $answer[] = $mscnds % $s;
    $mscnds -= $mscnds % $s;
    
    $answer[] = ($mscnds % $m) / $s;
    $mscnds -= $mscnds % $m;
    
    $answer[] = ($mscnds % $h) / $m;
    $mscnds -= $mscnds % $h;
    
    $answer[] = $mscnds / $h;
    return sprintf("%02d:%02d:%02d,%03d",...array_reverse($answer));    
  };
  
  # 99:59:59,999
  $max = $to_ms(99,59,59,999);
  $y = $to_time($max);
  echo "$y - test max\n";
  
  # "01:09:02,684 --> 01:09:03,601 Run Forrest, run!"
  $check = preg_match('/^(\d+):(\d+):(\d+),(\d+) --> (\d+):(\d+):(\d+),(\d+) (.*)$/',$string,$match);
  if(!$check) throw new Exception('Regex does not match.');
  $s_h =  intval($match[1],10);
  $s_m =  intval($match[2],10);
  $s_s =  intval($match[3],10);
  $s_x =  intval($match[4],10);
  $e_h =  intval($match[5],10);
  $e_m =  intval($match[6],10);
  $e_s =  intval($match[7],10);
  $e_x =  intval($match[8],10);
  $text = $match[9];
  $start_total = $to_ms($s_h,$s_m,$s_s,$s_x);
  $end_total = $to_ms($e_h,$e_m,$e_s,$e_x);
  
  $start_new = $start_total + $offset;
  $end_new = $end_total + $offset;
  
  $start_init = $to_time($start_total);
  $end_init = $to_time($end_total);
  
  $start_changed = $to_time($start_new);
  $end_changed = $to_time($end_new);
  
  echo "$string\n";
  echo "$start_init --> $end_init $text\n";
  echo "$start_changed --> $end_changed $text\n";
  
  if($start_new < 0 || $end_new < 0){
    echo "Less then zero.\n";
    return $n;
  }
  if($start_new > $max || $end_new > $max){
    echo "Greater than max.\n";
    return $n;
  }
    
  return "$start_changed --> $end_changed $text";
}