<?php

ini_set('memory_limit', '512M');

function getEvents() {
  $content = file_get_contents("dat/events.json");
  $entries = json_decode($content, $associative = true);
  for ( $i = 0; $i < count($entries); $i++ ) {
    $entry = $entries[$i];
    $dt = new DateTime( $entry["start"] );
    $ctl = $dt -> format("YmdHi");
    $entries[$i]["ctl"] = $ctl;
    $start = new DateTime($entries[$i]["start"]);
    $end = new DateTime($entries[$i]["end"]);
    $delta = $start->diff($end);
    $hours = $delta -> days * 24 + $delta -> h + $delta -> i / 60 + $delta -> s / 3600;
    $entries[$i]["hours"] = $hours;
    $datestamp = $dt -> format("Ymd");
    $files = array( "agenda" => sprintf("dat/agenda/%d.md", $datestamp)
                  , "minutes" => sprintf("dat/minutes/%d.md", $datestamp)
                  );
    foreach ( $files as $key => $file ) {
      if ( file_exists( $file ) ) {
        $entries[$i][$key] = file_get_contents($file);
      }
    }
  }
  usort($entries, function ($a, $b) {
    $dateA = new DateTime($a['start']);
    $dateB = new DateTime($b['start']);
    return $dateA < $dateB ? 1 : -1;
  });
  return($entries);
}

function putEvents($events) {
  for ( $i = 0; $i < count($events); $i++ ) {
    $entry = $events[$i];
    $dt = new DateTime( $entry["start"] );
    $start = new DateTime($entry["start"]);
    $datestamp = $dt -> format("Ymd");
    $files = array( "agenda" => sprintf("dat/agenda/%d.md", $datestamp)
                  , "minutes" => sprintf("dat/minutes/%d.md", $datestamp)
                  );
    foreach ( $files as $key => $path ) {
      if ( in_array($key, array_keys($entry)) ) {
        $fout = fopen($path, "wt");
        fwrite($fout, $entry[$key]);
        fclose($fout);
      } else {
        if ( file_exists($path) ) {
          unlink($path);
        }
      }
    }
    foreach ( array( "ctl", "hours", "agenda", "minutes" ) as $field ) {
      unset($events[$i][$field]);
    }
  }
  $json = json_encode($events, JSON_UNESCAPED_SLASHES|JSON_PRETTY_PRINT);
  file_put_contents("dat/events.json", $json);
}

?>