lib/functions.js.php

   1 <?php
   2 /*
   3  *  Jirafeau, your web file repository
   4  *  Copyright (C) 2015  Jerome Jutteau <jerome@jutteau.fr>
   5  *  Copyright (C) 2015  Nicola Spanti (RyDroid) <dev@nicola-spanti.info>
   6  *
   7  *  This program is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU Affero General Public License as
   9  *  published by the Free Software Foundation, either version 3 of the
  10  *  License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Affero General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Affero General Public License
  18  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  */
  20
  21 header('Content-Type: text/javascript');
  22 define('JIRAFEAU_ROOT', dirname(__FILE__) . '/../');
  23
  24 require(JIRAFEAU_ROOT . 'lib/settings.php');
  25 require(JIRAFEAU_ROOT . 'lib/functions.php');
  26 require(JIRAFEAU_ROOT . 'lib/lang.php');
  27 ?>
  28 // @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
  29 var web_root = "<?php echo $cfg['web_root']; ?>";
  30
  31 var lang_array = <?php echo json_lang_generator(null); ?>;
  32 var lang_array_fallback = <?php echo json_lang_generator("en"); ?>;
  33
  34 function translate (expr) {
  35     if (lang_array.hasOwnProperty(expr)) {
  36         var e = lang_array[expr];
  37         if (!isEmpty(e))
  38             return e;
  39     }
  40     if (lang_array_fallback.hasOwnProperty(expr)) {
  41         var e = lang_array_fallback[expr];
  42         if (!isEmpty(e))
  43             return e;
  44     }
  45     return "FIXME: " + expr;
  46 }
  47
  48 function isEmpty(str) {
  49     return (!str || 0 === str.length);
  50 }
  51
  52 // Extend date object with format method
  53 Date.prototype.format = function(format) {
  54     format = format || 'YYYY-MM-DD hh:mm';
  55
  56     var zeropad = function(number, length) {
  57         number = number.toString();
  58         length = length || 2;
  59         while(number.length < length)
  60             number = '0' + number;
  61         return number;
  62     },
  63     formats = {
  64         YYYY: this.getFullYear(),
  65         MM: zeropad(this.getMonth() + 1),
  66         DD: zeropad(this.getDate()),
  67         hh: zeropad(this.getHours()),
  68         mm: zeropad(this.getMinutes()),
  69         O: (function() {
  70             localDate = new Date;
  71             sign = (localDate.getTimezoneOffset() > 0) ? '-' : '+';
  72             offset = Math.abs(localDate.getTimezoneOffset());
  73             hours = zeropad(Math.floor(offset / 60));
  74             minutes = zeropad(offset % 60);
  75             return sign + hours + ":" + minutes;
  76         })()
  77     },
  78     pattern = '(' + Object.keys(formats).join(')|(') + ')';
  79
  80     return format.replace(new RegExp(pattern, 'g'), function(match) {
  81         return formats[match];
  82     });
  83 };
  84
  85 function dateFromUtcString(datestring) {
  86     // matches »YYYY-MM-DD hh:mm«
  87     var m = datestring.match(/(\d+)-(\d+)-(\d+)\s+(\d+):(\d+)/);
  88     return new Date(Date.UTC(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], 0));
  89 }
  90
  91 function dateFromUtcTimestamp(datetimestamp) {
  92     return new Date(parseInt(datetimestamp) * 1000)
  93 }
  94
  95 function dateToUtcString(datelocal) {
  96     return new Date(
  97         datelocal.getUTCFullYear(),
  98         datelocal.getUTCMonth(),
  99         datelocal.getUTCDate(),
 100         datelocal.getUTCHours(),
 101         datelocal.getUTCMinutes(),
 102         datelocal.getUTCSeconds()
 103     ).format();
 104 }
 105
 106 function dateToUtcTimestamp(datelocal) {
 107     return (Date.UTC(
 108         datelocal.getUTCFullYear(),
 109         datelocal.getUTCMonth(),
 110         datelocal.getUTCDate(),
 111         datelocal.getUTCHours(),
 112         datelocal.getUTCMinutes(),
 113         datelocal.getUTCSeconds()
 114     ) / 1000);
 115 }
 116
 117 function convertAllDatetimeFields() {
 118     datefields = document.getElementsByClassName('datetime')
 119     for(var i=0; i<datefields.length; i++) {
 120         dateUTC = datefields[i].getAttribute('data-datetime');
 121         datefields[i].setAttribute('title', dateUTC + ' (GMT)');
 122         datefields[i].innerHTML = dateFromUtcString(dateUTC).format('YYYY-MM-DD hh:mm (GMT O)');
 123     }
 124 }
 125
 126 function show_link (reference, delete_code, crypt_key, date)
 127 {
 128     // Upload finished
 129     document.getElementById('uploading').style.display = 'none';
 130     document.getElementById('upload').style.display = 'none';
 131     document.getElementById('upload_finished').style.display = '';
 132     document.title = "100% - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 133
 134     // Download page
 135     var download_link_href = 'f.php?h=' + reference;
 136     if (crypt_key.length > 0)
 137     {
 138         download_link_href += '&k=' + crypt_key;
 139     }
 140     if (!!document.getElementById('upload_finished_download_page'))
 141     {
 142         document.getElementById('upload_link').href = download_link_href;
 143         document.getElementById('upload_link_text').innerHTML = web_root + download_link_href;
 144     }
 145
 146     // Email link
 147     var filename = document.getElementById('file_select').files[0].name;
 148     var b = encodeURIComponent("<?php echo t("DL"); ?> \"" + filename + "\":") + "%0D" + "%0A";
 149     b += encodeURIComponent(web_root + download_link_href) + "%0D" + "%0A";
 150     if (false == isEmpty(date))
 151     {
 152         b += "%0D" + "%0A" + encodeURIComponent("<?php echo t("VALID_UNTIL"); ?>: " + date.format('YYYY-MM-DD hh:mm (GMT O)')) + "%0D" + "%0A";
 153         document.getElementById('upload_link_email').href = "mailto:?body=" + b + "&subject=" + encodeURIComponent(filename);
 154     }
 155
 156     // Delete link
 157     var delete_link_href = 'f.php?h=' + reference + '&d=' + delete_code;
 158     document.getElementById('delete_link').href = delete_link_href;
 159     document.getElementById('delete_link_text').innerHTML = web_root + delete_link_href;
 160
 161     // Validity date
 162     if (isEmpty(date))
 163     {
 164         document.getElementById('date').style.display = 'none';
 165     }
 166     else {
 167         document.getElementById('date').innerHTML = '<span class="datetime" title="'
 168             + dateToUtcString(date) + ' (GMT)">'
 169             + date.format('YYYY-MM-DD hh:mm (GMT O)')
 170             + '</span>';
 171         document.getElementById('date').style.display = '';
 172     }
 173
 174     // Preview link (if allowed)
 175     if (!!document.getElementById('preview_link'))
 176     {
 177         document.getElementById('upload_finished_preview').style.display = 'none';
 178         var preview_link_href = 'f.php?h=' + reference + '&p=1';
 179         if (crypt_key.length > 0)
 180         {
 181             preview_link_href += '&k=' + crypt_key;
 182         }
 183
 184         // Test if content can be previewed
 185          type = document.getElementById('file_select').files[0].type;
 186          if (type.indexOf("image") > -1 ||
 187              type.indexOf("audio") > -1 ||
 188              type.indexOf("text") > -1 ||
 189              type.indexOf("video") > -1)
 190          {
 191             document.getElementById('preview_link').href = preview_link_href;
 192             document.getElementById('preview_link_text').innerHTML = web_root + preview_link_href;
 193             document.getElementById('upload_finished_preview').style.display = '';
 194          }
 195     }
 196
 197     // Direct download link
 198     var direct_download_link_href = 'f.php?h=' + reference + '&d=1';
 199     if (crypt_key.length > 0)
 200     {
 201         direct_download_link_href += '&k=' + crypt_key;
 202     }
 203     document.getElementById('direct_link').href = direct_download_link_href;
 204     document.getElementById('direct_link_text').innerHTML = web_root + direct_download_link_href;
 205
 206     // Hide preview and direct download link if password is set
 207     if (document.getElementById('input_key').value.length > 0)
 208     {
 209         if (!!document.getElementById('preview_link'))
 210             document.getElementById('upload_finished_preview').style.display = 'none';
 211         document.getElementById('upload_direct_download').style.display = 'none';
 212     }
 213 }
 214
 215 function show_upload_progression (percentage, speed, time_left)
 216 {
 217     document.getElementById('uploaded_percentage').innerHTML = percentage;
 218     document.getElementById('uploaded_speed').innerHTML = speed;
 219     document.getElementById('uploaded_time').innerHTML = time_left;
 220     document.title = percentage + " - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 221 }
 222
 223 function hide_upload_progression ()
 224 {
 225     document.getElementById('uploaded_percentage').style.display = 'none';
 226     document.getElementById('uploaded_speed').style.display = 'none';
 227     document.getElementById('uploaded_time').style.display = 'none';
 228     document.title = "<?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 229 }
 230
 231 function upload_progress (e)
 232 {
 233     if (e == undefined || e == null || !e.lengthComputable)
 234         return;
 235
 236     // Init time estimation if needed
 237     if (upload_time_estimation_total_size == 0)
 238         upload_time_estimation_total_size = e.total;
 239
 240     // Compute percentage
 241     var p = Math.round (e.loaded * 100 / e.total);
 242     var p_str = ' ';
 243     if (p != 100)
 244         p_str = p.toString() + '%';
 245     // Update estimation speed
 246     upload_time_estimation_add(e.loaded);
 247     // Get speed string
 248     var speed_str = upload_time_estimation_speed_string();
 249     speed_str = upload_speed_refresh_limiter(speed_str);
 250     // Get time string
 251     var time_str = chrono_update(upload_time_estimation_time());
 252
 253     show_upload_progression (p_str, speed_str, time_str);
 254 }
 255
 256 function control_selected_file_size(max_size, error_str)
 257 {
 258     f_size = document.getElementById('file_select').files[0].size;
 259     if (max_size > 0 && f_size > max_size * 1024 * 1024)
 260     {
 261         pop_failure(error_str);
 262         document.getElementById('send').style.display = 'none';
 263     }
 264     else
 265     {
 266         // add class to restyle upload form in next step
 267         document.getElementById('upload').setAttribute('class', 'file-selected');
 268         // display options
 269         document.getElementById('options').style.display = 'block';
 270         document.getElementById('send').style.display = 'block';
 271         document.getElementById('error_pop').style.display = 'none';
 272         document.getElementById('send').focus();
 273     }
 274 }
 275
 276 function pop_failure (e)
 277 {
 278     var text = "An error occured";
 279     if (typeof e !== 'undefined')
 280         text = e;
 281     text = "<p>" + text + "</p>";
 282     document.getElementById('error_pop').innerHTML = e;
 283
 284     document.getElementById('uploading').style.display = 'none';
 285     document.getElementById('error_pop').style.display = '';
 286     document.getElementById('upload').style.display = '';
 287     document.getElementById('send').style.display = '';
 288 }
 289
 290 function add_time_string_to_date(d, time)
 291 {
 292     if(typeof(d) != 'object' || !(d instanceof Date))
 293     {
 294         return false;
 295     }
 296
 297     if (time == 'minute')
 298     {
 299         d.setSeconds (d.getSeconds() + 60);
 300         return true;
 301     }
 302     if (time == 'hour')
 303     {
 304         d.setSeconds (d.getSeconds() + 3600);
 305         return true;
 306     }
 307     if (time == 'day')
 308     {
 309         d.setSeconds (d.getSeconds() + 86400);
 310         return true;
 311     }
 312     if (time == 'week')
 313     {
 314         d.setSeconds (d.getSeconds() + 604800);
 315         return true;
 316     }
 317     if (time == 'month')
 318     {
 319                 d.setSeconds (d.getSeconds() + 2592000);
 320         return true;
 321     }
 322     if (time == 'quarter')
 323     {
 324                 d.setSeconds (d.getSeconds() + 7776000);
 325         return true;
 326     }
 327     if (time == 'year')
 328     {
 329                 d.setSeconds (d.getSeconds() + 31536000);
 330         return true;
 331     }
 332     return false;
 333 }
 334
 335 function classic_upload (file, time, password, one_time, upload_password)
 336 {
 337     // Delay time estimation init as we can't have file size
 338     upload_time_estimation_init(0);
 339
 340     var req = new XMLHttpRequest ();
 341     req.upload.addEventListener ("progress", upload_progress, false);
 342     req.addEventListener ("error", pop_failure, false);
 343     req.addEventListener ("abort", pop_failure, false);
 344     req.onreadystatechange = function ()
 345     {
 346         if (req.readyState == 4 && req.status == 200)
 347         {
 348             var res = req.responseText;
 349
 350             // if response starts with "Error" then show a failure
 351             if (/^Error/.test(res))
 352             {
 353                 pop_failure (res);
 354                 return;
 355             }
 356
 357             res = res.split ("\n");
 358             var expiryDate = '';
 359             if (time != 'none')
 360             {
 361                 // convert time (local time + selected expiry date)
 362                 var localDatetime = new Date();
 363                 if(!add_time_string_to_date(localDatetime, time))
 364                 {
 365                     pop_failure ('Error: Date can not be parsed');
 366                     return;
 367                 }
 368                 expiryDate = localDatetime;
 369             }
 370
 371             show_link (res[0], res[1], res[2], expiryDate);
 372         }
 373     }
 374     req.open ("POST", 'script.php' , true);
 375
 376     var form = new FormData();
 377     form.append ("file", file);
 378     if (time)
 379         form.append ("time", time);
 380     if (password)
 381         form.append ("key", password);
 382     if (one_time)
 383         form.append ("one_time_download", '1');
 384     if (upload_password.length > 0)
 385         form.append ("upload_password", upload_password);
 386
 387     req.send (form);
 388 }
 389
 390 function check_html5_file_api ()
 391 {
 392     return window.File && window.FileReader && window.FileList && window.Blob;
 393 }
 394
 395 var async_global_transfered = 0;
 396 var async_global_file;
 397 var async_global_ref = '';
 398 var async_global_max_size = 0;
 399 var async_global_time;
 400 var async_global_transfering = 0;
 401 var async_global_last_code;
 402
 403 function async_upload_start (max_size, file, time, password, one_time, upload_password)
 404 {
 405     async_global_transfered = 0;
 406     async_global_file = file;
 407     async_global_max_size = max_size;
 408     async_global_time = time;
 409
 410     var req = new XMLHttpRequest ();
 411     req.addEventListener ("error", pop_failure, false);
 412     req.addEventListener ("abort", pop_failure, false);
 413     req.onreadystatechange = function ()
 414     {
 415         if (req.readyState == 4 && req.status == 200)
 416         {
 417             var res = req.responseText;
 418
 419             if (/^Error/.test(res))
 420             {
 421                 pop_failure (res);
 422                 return;
 423             }
 424
 425             res = res.split ("\n");
 426             async_global_ref = res[0];
 427             var code = res[1];
 428             async_upload_push (code);
 429         }
 430     }
 431     req.open ("POST", 'script.php?init_async' , true);
 432
 433     var form = new FormData();
 434     form.append ("filename", async_global_file.name);
 435     form.append ("type", async_global_file.type);
 436     if (time)
 437         form.append ("time", time);
 438     if (password)
 439         form.append ("key", password);
 440     if (one_time)
 441         form.append ("one_time_download", '1');
 442     if (upload_password.length > 0)
 443         form.append ("upload_password", upload_password);
 444
 445     // Start time estimation
 446     upload_time_estimation_init(async_global_file.size);
 447
 448     req.send (form);
 449 }
 450
 451 function async_upload_progress (e)
 452 {
 453     if (e == undefined || e == null || !e.lengthComputable && async_global_file.size != 0)
 454         return;
 455
 456     // Compute percentage
 457     var p = Math.round ((e.loaded + async_global_transfered) * 100 / (async_global_file.size));
 458     var p_str = ' ';
 459     if (p != 100)
 460         p_str = p.toString() + '%';
 461     // Update estimation speed
 462     upload_time_estimation_add(e.loaded + async_global_transfered);
 463     // Get speed string
 464     var speed_str = upload_time_estimation_speed_string();
 465     speed_str = upload_speed_refresh_limiter(speed_str);
 466     // Get time string
 467     var time_str = chrono_update(upload_time_estimation_time());
 468
 469     show_upload_progression (p_str, speed_str, time_str);
 470 }
 471
 472 function async_upload_push (code)
 473 {
 474     async_global_last_code = code;
 475     if (async_global_transfered == async_global_file.size)
 476     {
 477         hide_upload_progression ();
 478         async_upload_end (code);
 479         return;
 480     }
 481     var req = new XMLHttpRequest ();
 482     req.upload.addEventListener ("progress", async_upload_progress, false);
 483     req.addEventListener ("error", pop_failure, false);
 484     req.addEventListener ("abort", pop_failure, false);
 485     req.onreadystatechange = function ()
 486     {
 487         if (req.readyState == 4)
 488         {
 489             if (req.status == 200)
 490             {
 491                 var res = req.responseText;
 492
 493                 if (/^Error/.test(res))
 494                 {
 495                     pop_failure (res);
 496                     return;
 497                 }
 498
 499                 res = res.split ("\n");
 500                 var code = res[0]
 501                 async_global_transfered = async_global_transfering;
 502                 async_upload_push (code);
 503             }
 504             else if (req.status == 413) // Request Entity Too Large
 505             {
 506                 // lower async_global_max_size and retry
 507                 async_global_max_size = parseInt (async_global_max_size * 0.8);
 508                 async_upload_push (async_global_last_code);
 509             }
 510         }
 511     }
 512     req.open ("POST", 'script.php?push_async' , true);
 513
 514     var start = async_global_transfered;
 515     var end = start + async_global_max_size;
 516     if (end >= async_global_file.size)
 517         end = async_global_file.size;
 518     var blob = async_global_file.slice (start, end);
 519     async_global_transfering = end;
 520
 521     var form = new FormData();
 522     form.append ("ref", async_global_ref);
 523     form.append ("data", blob);
 524     form.append ("code", code);
 525     req.send (form);
 526 }
 527
 528 function async_upload_end (code)
 529 {
 530     var req = new XMLHttpRequest ();
 531     req.addEventListener ("error", pop_failure, false);
 532     req.addEventListener ("abort", pop_failure, false);
 533     req.onreadystatechange = function ()
 534     {
 535         if (req.readyState == 4 && req.status == 200)
 536         {
 537             var res = req.responseText;
 538
 539             if (/^Error/.test(res))
 540             {
 541                 pop_failure (res);
 542                 return;
 543             }
 544
 545             res = res.split ("\n");
 546             var expiryDate = '';
 547             if (async_global_time != 'none')
 548             {
 549               // convert time (local time + selected expiry date)
 550               var localDatetime = new Date();
 551               if(!add_time_string_to_date(localDatetime, async_global_time)) {
 552                 pop_failure ('Error: Date can not be parsed');
 553                 return;
 554               }
 555               expiryDate = localDatetime;
 556             }
 557
 558             show_link (res[0], res[1], res[2], expiryDate);
 559         }
 560     }
 561     req.open ("POST", 'script.php?end_async' , true);
 562
 563     var form = new FormData();
 564     form.append ("ref", async_global_ref);
 565     form.append ("code", code);
 566     req.send (form);
 567 }
 568
 569 function upload (max_size)
 570 {
 571     var one_time_checkbox = document.getElementById('one_time_download');
 572     var one_time = one_time_checkbox !== null ? one_time_checkbox.checked : false;
 573     if (check_html5_file_api ()
 574         && document.getElementById('file_select').files[0].size >= max_size)
 575     {
 576         async_upload_start (
 577             max_size,
 578             document.getElementById('file_select').files[0],
 579             document.getElementById('select_time').value,
 580             document.getElementById('input_key').value,
 581             one_time,
 582             document.getElementById('upload_password').value
 583             );
 584     }
 585     else
 586     {
 587         classic_upload (
 588             document.getElementById('file_select').files[0],
 589             document.getElementById('select_time').value,
 590             document.getElementById('input_key').value,
 591             one_time,
 592             document.getElementById('upload_password').value
 593             );
 594     }
 595 }
 596
 597 var upload_time_estimation_total_size = 42;
 598 var upload_time_estimation_transfered_size = 42;
 599 var upload_time_estimation_transfered_date = 42;
 600 var upload_time_estimation_moving_average_speed = 42;
 601
 602 function upload_time_estimation_init(total_size)
 603 {
 604     upload_time_estimation_total_size = total_size;
 605     upload_time_estimation_transfered_size = 0;
 606     upload_time_estimation_moving_average_speed = 0;
 607     var d = new Date();
 608     upload_time_estimation_transfered_date = d.getTime();
 609 }
 610
 611 function upload_time_estimation_add(total_transfered_size)
 612 {
 613     // Let's compute the current speed
 614     var d = new Date();
 615     var speed = upload_time_estimation_moving_average_speed;
 616     if (d.getTime() - upload_time_estimation_transfered_date != 0)
 617         speed = (total_transfered_size - upload_time_estimation_transfered_size)
 618                 / (d.getTime() - upload_time_estimation_transfered_date);
 619     // Let's compute moving average speed on 30 values
 620     var m = (upload_time_estimation_moving_average_speed * 29 + speed) / 30;
 621     // Update global values
 622     upload_time_estimation_transfered_size = total_transfered_size;
 623     upload_time_estimation_transfered_date = d.getTime();
 624     upload_time_estimation_moving_average_speed = m;
 625 }
 626
 627 function upload_time_estimation_speed_string()
 628 {
 629     // speed ms -> s
 630     var s = upload_time_estimation_moving_average_speed * 1000;
 631     var res = 0;
 632     var scale = '';
 633     if (s <= 1000)
 634     {
 635         res = s.toString();
 636         scale = "B/s";
 637     }
 638     else if (s < 1000000)
 639     {
 640         res = Math.floor(s/100) / 10;
 641         scale = "KB/s";
 642     }
 643     else
 644     {
 645         res = Math.floor(s/100000) / 10;
 646         scale = "MB/s";
 647     }
 648     if (res == 0)
 649         return '';
 650     return res.toString() + ' ' + scale;
 651 }
 652
 653 function milliseconds_to_time_string (milliseconds)
 654 {
 655     function numberEnding (number) {
 656         return (number > 1) ? translate ('PLURAL_ENDING') : '';
 657     }
 658
 659     var temp = Math.floor(milliseconds / 1000);
 660     var years = Math.floor(temp / 31536000);
 661     if (years) {
 662         return years + ' ' + translate ('YEAR') + numberEnding(years);
 663     }
 664     var days = Math.floor((temp %= 31536000) / 86400);
 665     if (days) {
 666         return days + ' ' + translate ('DAY') + numberEnding(days);
 667     }
 668     var hours = Math.floor((temp %= 86400) / 3600);
 669     if (hours) {
 670         return hours + ' ' + translate ('HOUR') + numberEnding(hours);
 671     }
 672     var minutes = Math.floor((temp %= 3600) / 60);
 673     if (minutes) {
 674         return minutes + ' ' + translate ('MINUTE') + numberEnding(minutes);
 675     }
 676     var seconds = temp % 60;
 677     if (seconds) {
 678         return seconds + ' ' + translate ('SECOND') + numberEnding(seconds);
 679     }
 680     return translate ('LESS_1_SEC');
 681 }
 682
 683 function upload_time_estimation_time()
 684 {
 685     // Estimate remaining time
 686     if (upload_time_estimation_moving_average_speed == 0)
 687         return 0;
 688     return (upload_time_estimation_total_size - upload_time_estimation_transfered_size)
 689             / upload_time_estimation_moving_average_speed;
 690 }
 691
 692 var chrono_last_update = 0;
 693 var chrono_time_ms = 0;
 694 var chrono_time_ms_last_update = 0;
 695 function chrono_update(time_ms)
 696 {
 697     var d = new Date();
 698     var chrono = 0;
 699     // Don't update too often
 700     if (d.getTime() - chrono_last_update < 3000 &&
 701         chrono_time_ms_last_update > 0)
 702         chrono = chrono_time_ms;
 703     else
 704     {
 705         chrono_last_update = d.getTime();
 706         chrono_time_ms = time_ms;
 707         chrono = time_ms;
 708         chrono_time_ms_last_update = d.getTime();
 709     }
 710
 711     // Adjust chrono for smooth estimation
 712     chrono = chrono - (d.getTime() - chrono_time_ms_last_update);
 713
 714     // Let's update chronometer
 715     var time_str = '';
 716     if (chrono > 0)
 717         time_str = milliseconds_to_time_string (chrono);
 718     return time_str;
 719 }
 720
 721 var upload_speed_refresh_limiter_last_update = 0;
 722 var upload_speed_refresh_limiter_last_value = '';
 723 function upload_speed_refresh_limiter(speed_str)
 724 {
 725     var d = new Date();
 726     if (d.getTime() - upload_speed_refresh_limiter_last_update > 1500)
 727     {
 728         upload_speed_refresh_limiter_last_value = speed_str;
 729         upload_speed_refresh_limiter_last_update = d.getTime();
 730     }
 731     return upload_speed_refresh_limiter_last_value;
 732 }
 733
 734 // document.ready()
 735 document.addEventListener('DOMContentLoaded', function(event) {
 736     // Search for all datetime fields and convert the time to local timezone
 737     convertAllDatetimeFields();
 738 });
 739
 740 // Add copy event listeners
 741 function copyLinkToClipboard(link_id) {
 742     var focus = document.activeElement;
 743     var e = document.getElementById(link_id);
 744
 745     var tmp = document.createElement("textarea");
 746     document.body.appendChild(tmp);
 747     tmp.textContent = e.href;
 748     tmp.focus();
 749     tmp.setSelectionRange(0, tmp.value.length);
 750     document.execCommand("copy");
 751     document.body.removeChild(tmp);
 752
 753     focus.focus();
 754 }
 755
 756 function addCopyListener(button_id, link_id) {
 757     if(document.getElementById(button_id)){
 758         document.getElementById(button_id)
 759             .addEventListener("click", function() {
 760                 copyLinkToClipboard(link_id);});
 761     }
 762 }
 763 // @license-end