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 ?>
  29 // @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
  30 var web_root = "<?php echo $cfg['web_root']; ?>";
  31
  32 var lang_array = <?php echo json_lang_generator(null); ?>;
  33 var lang_array_fallback = <?php echo json_lang_generator("en"); ?>;
  34
  35 function translate (expr) {
  36     if (lang_array.hasOwnProperty(expr)) {
  37         var e = lang_array[expr];
  38         if (!isEmpty(e))
  39             return e;
  40     }
  41     if (lang_array_fallback.hasOwnProperty(expr)) {
  42         var e = lang_array_fallback[expr];
  43         if (!isEmpty(e))
  44             return e;
  45     }
  46     return "FIXME: " + expr;
  47 }
  48
  49 function isEmpty(str) {
  50     return (!str || 0 === str.length);
  51 }
  52
  53 // Extend date object with format method
  54 Date.prototype.format = function(format) {
  55     format = format || 'YYYY-MM-DD hh:mm';
  56
  57     var zeropad = function(number, length) {
  58         number = number.toString();
  59         length = length || 2;
  60         while(number.length < length)
  61             number = '0' + number;
  62         return number;
  63     },
  64     formats = {
  65         YYYY: this.getFullYear(),
  66         MM: zeropad(this.getMonth() + 1),
  67         DD: zeropad(this.getDate()),
  68         hh: zeropad(this.getHours()),
  69         mm: zeropad(this.getMinutes()),
  70         O: (function() {
  71             localDate = new Date;
  72             sign = (localDate.getTimezoneOffset() > 0) ? '-' : '+';
  73             offset = Math.abs(localDate.getTimezoneOffset());
  74             hours = zeropad(Math.floor(offset / 60));
  75             minutes = zeropad(offset % 60);
  76             return sign + hours + ":" + minutes;
  77         })()
  78     },
  79     pattern = '(' + Object.keys(formats).join(')|(') + ')';
  80
  81     return format.replace(new RegExp(pattern, 'g'), function(match) {
  82         return formats[match];
  83     });
  84 };
  85
  86 function dateFromUtcString(datestring) {
  87     // matches »YYYY-MM-DD hh:mm«
  88     var m = datestring.match(/(\d+)-(\d+)-(\d+)\s+(\d+):(\d+)/);
  89     return new Date(Date.UTC(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], 0));
  90 }
  91
  92 function dateFromUtcTimestamp(datetimestamp) {
  93     return new Date(parseInt(datetimestamp) * 1000)
  94 }
  95
  96 function dateToUtcString(datelocal) {
  97     return new Date(
  98         datelocal.getUTCFullYear(),
  99         datelocal.getUTCMonth(),
 100         datelocal.getUTCDate(),
 101         datelocal.getUTCHours(),
 102         datelocal.getUTCMinutes(),
 103         datelocal.getUTCSeconds()
 104     ).format();
 105 }
 106
 107 function dateToUtcTimestamp(datelocal) {
 108     return (Date.UTC(
 109         datelocal.getUTCFullYear(),
 110         datelocal.getUTCMonth(),
 111         datelocal.getUTCDate(),
 112         datelocal.getUTCHours(),
 113         datelocal.getUTCMinutes(),
 114         datelocal.getUTCSeconds()
 115     ) / 1000);
 116 }
 117
 118 function convertAllDatetimeFields() {
 119     datefields = document.getElementsByClassName('datetime')
 120     for(var i=0; i<datefields.length; i++) {
 121         dateUTC = datefields[i].getAttribute('data-datetime');
 122         datefields[i].setAttribute('title', dateUTC + ' (GMT)');
 123         datefields[i].innerHTML = dateFromUtcString(dateUTC).format('YYYY-MM-DD hh:mm (GMT O)');
 124     }
 125 }
 126
 127 function show_link (reference, delete_code, crypt_key, date)
 128 {
 129     // Upload finished
 130     document.getElementById('uploading').style.display = 'none';
 131     document.getElementById('upload').style.display = 'none';
 132     document.getElementById('upload_finished').style.display = '';
 133     document.title = "100% - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 134
 135     // Download page
 136     var download_link_href = 'f.php?h=' + reference;
 137     if (crypt_key.length > 0)
 138     {
 139         download_link_href += '&k=' + crypt_key;
 140     }
 141     if (!!document.getElementById('upload_finished_download_page'))
 142     {
 143         document.getElementById('upload_link').href = download_link_href;
 144         document.getElementById('upload_link_text').innerHTML = web_root + download_link_href;
 145     }
 146
 147     // Email link
 148     var filename = document.getElementById('file_select').files[0].name;
 149     var b = encodeURIComponent("<?php echo t("DL"); ?> \"" + filename + "\":") + "%0D" + "%0A";
 150     b += encodeURIComponent(web_root + download_link_href) + "%0D" + "%0A";
 151     if (false == isEmpty(date))
 152     {
 153         b += "%0D" + "%0A" + encodeURIComponent("<?php echo t("VALID_UNTIL"); ?>: " + date.format('YYYY-MM-DD hh:mm (GMT O)')) + "%0D" + "%0A";
 154         document.getElementById('upload_link_email').href = "mailto:?body=" + b + "&subject=" + encodeURIComponent(filename);
 155     }
 156
 157     // Delete link
 158     var delete_link_href = 'f.php?h=' + reference + '&d=' + delete_code;
 159     document.getElementById('delete_link').href = delete_link_href;
 160     document.getElementById('delete_link_text').innerHTML = web_root + delete_link_href;
 161
 162     // Validity date
 163     if (isEmpty(date))
 164     {
 165         document.getElementById('date').style.display = 'none';
 166     }
 167     else {
 168         document.getElementById('date').innerHTML = '<span class="datetime" title="'
 169             + dateToUtcString(date) + ' (GMT)">'
 170             + date.format('YYYY-MM-DD hh:mm (GMT O)')
 171             + '</span>';
 172         document.getElementById('date').style.display = '';
 173     }
 174
 175     // Preview link (if allowed)
 176     if (!!document.getElementById('preview_link'))
 177     {
 178         document.getElementById('upload_finished_preview').style.display = 'none';
 179         var preview_link_href = 'f.php?h=' + reference + '&p=1';
 180         if (crypt_key.length > 0)
 181         {
 182             preview_link_href += '&k=' + crypt_key;
 183         }
 184
 185         // Test if content can be previewed
 186         type = document.getElementById('file_select').files[0].type;
 187         if ((type.startsWith('image/')
 188                 || type.startsWith('audio')
 189                 || type.startsWith('text/plain')
 190                 || type.startsWith('video/'))
 191             && !type.includes('image/svg+xml'))
 192         {
 193             document.getElementById('preview_link').href = preview_link_href;
 194             document.getElementById('preview_link_text').innerHTML = web_root + preview_link_href;
 195             document.getElementById('upload_finished_preview').style.display = '';
 196         }
 197     }
 198
 199     // Direct download link
 200     var direct_download_link_href = 'f.php?h=' + reference + '&d=1';
 201     if (crypt_key.length > 0)
 202     {
 203         direct_download_link_href += '&k=' + crypt_key;
 204     }
 205     document.getElementById('direct_link').href = direct_download_link_href;
 206     document.getElementById('direct_link_text').innerHTML = web_root + direct_download_link_href;
 207
 208     // Hide preview and direct download link if password is set
 209     if (document.getElementById('input_key').value.length > 0)
 210     {
 211         if (!!document.getElementById('preview_link'))
 212             document.getElementById('upload_finished_preview').style.display = 'none';
 213         document.getElementById('upload_direct_download').style.display = 'none';
 214     }
 215 }
 216
 217 function show_upload_progression (percentage, speed, time_left)
 218 {
 219     document.getElementById('uploaded_percentage').innerHTML = percentage;
 220     document.getElementById('uploaded_speed').innerHTML = speed;
 221     document.getElementById('uploaded_time').innerHTML = time_left;
 222     document.title = percentage + " - <?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 223 }
 224
 225 function hide_upload_progression ()
 226 {
 227     document.getElementById('uploaded_percentage').style.display = 'none';
 228     document.getElementById('uploaded_speed').style.display = 'none';
 229     document.getElementById('uploaded_time').style.display = 'none';
 230     document.title = "<?php echo empty($cfg['title']) ? 'Jirafeau' : $cfg['title']; ?>";
 231 }
 232
 233 function upload_progress (e)
 234 {
 235     if (e == undefined || e == null || !e.lengthComputable)
 236         return;
 237
 238     // Init time estimation if needed
 239     if (upload_time_estimation_total_size == 0)
 240         upload_time_estimation_total_size = e.total;
 241
 242     // Compute percentage
 243     var p = Math.round (e.loaded * 100 / e.total);
 244     var p_str = ' ';
 245     if (p != 100)
 246         p_str = p.toString() + '%';
 247     // Update estimation speed
 248     upload_time_estimation_add(e.loaded);
 249     // Get speed string
 250     var speed_str = upload_time_estimation_speed_string();
 251     speed_str = upload_speed_refresh_limiter(speed_str);
 252     // Get time string
 253     var time_str = chrono_update(upload_time_estimation_time());
 254
 255     show_upload_progression (p_str, speed_str, time_str);
 256 }
 257
 258 function control_selected_file_size(max_size, error_str)
 259 {
 260     f_size = document.getElementById('file_select').files[0].size;
 261     if (max_size > 0 && f_size > max_size * 1024 * 1024)
 262     {
 263         pop_failure(error_str);
 264         document.getElementById('send').style.display = 'none';
 265     }
 266     else
 267     {
 268         // add class to restyle upload form in next step
 269         document.getElementById('upload').setAttribute('class', 'file-selected');
 270         // display options
 271         document.getElementById('options').style.display = 'block';
 272         document.getElementById('send').style.display = 'block';
 273         document.getElementById('error_pop').style.display = 'none';
 274         document.getElementById('send').focus();
 275     }
 276 }
 277
 278 function XHRErrorHandler(e)
 279 {
 280     var text = "${e.type}: ${e.loaded} bytes transferred"
 281     console.log(text)
 282 }
 283
 284 function pop_failure (e)
 285 {
 286     var text = "<p>An error occured";
 287     if (typeof e !== 'undefined')
 288         text += ": " + e;
 289     text += "</p>";
 290     document.getElementById('error_pop').innerHTML = e;
 291
 292     document.getElementById('uploading').style.display = 'none';
 293     document.getElementById('error_pop').style.display = '';
 294     document.getElementById('upload').style.display = '';
 295     document.getElementById('send').style.display = '';
 296 }
 297
 298 function add_time_string_to_date(d, time)
 299 {
 300     if(typeof(d) != 'object' || !(d instanceof Date))
 301     {
 302         return false;
 303     }
 304
 305     if (time == 'minute')
 306     {
 307         d.setSeconds (d.getSeconds() + 60);
 308         return true;
 309     }
 310     if (time == 'hour')
 311     {
 312         d.setSeconds (d.getSeconds() + 3600);
 313         return true;
 314     }
 315     if (time == 'day')
 316     {
 317         d.setSeconds (d.getSeconds() + 86400);
 318         return true;
 319     }
 320     if (time == 'week')
 321     {
 322         d.setSeconds (d.getSeconds() + 604800);
 323         return true;
 324     }
 325     if (time == 'fortnight')
 326     {
 327         d.setSeconds (d.getSeconds() + 1209600);
 328         return true;
 329     }
 330     if (time == 'month')
 331     {
 332                 d.setSeconds (d.getSeconds() + 2592000);
 333         return true;
 334     }
 335     if (time == 'quarter')
 336     {
 337                 d.setSeconds (d.getSeconds() + 7776000);
 338         return true;
 339     }
 340     if (time == 'year')
 341     {
 342                 d.setSeconds (d.getSeconds() + 31536000);
 343         return true;
 344     }
 345     return false;
 346 }
 347
 348 function classic_upload (file, time, password, one_time)
 349 {
 350     // Delay time estimation init as we can't have file size
 351     upload_time_estimation_init(0);
 352
 353     var req = new XMLHttpRequest ();
 354     req.upload.addEventListener ("progress", upload_progress, false);
 355     req.addEventListener ("error", XHRErrorHandler, false);
 356     req.addEventListener ("abort", XHRErrorHandler, false);
 357     req.onreadystatechange = function ()
 358     {
 359         if (req.readyState == 4 && req.status == 200)
 360         {
 361             var res = req.responseText;
 362
 363             // if response starts with "Error" then show a failure
 364             if (/^Error/.test(res))
 365             {
 366                 pop_failure (res);
 367                 return;
 368             }
 369
 370             res = res.split ("\n");
 371             var expiryDate = '';
 372             if (time != 'none')
 373             {
 374                 // convert time (local time + selected expiry date)
 375                 var localDatetime = new Date();
 376                 if(!add_time_string_to_date(localDatetime, time))
 377                 {
 378                     pop_failure ('Error: Date can not be parsed');
 379                     return;
 380                 }
 381                 expiryDate = localDatetime;
 382             }
 383
 384             show_link (res[0], res[1], res[2], expiryDate);
 385         }
 386         else
 387         {
 388             pop_failure ("<?php echo t("ERR_OCC"); ?>");
 389         }
 390     }
 391     req.open ("POST", 'script.php' , true);
 392
 393     var form = new FormData();
 394     form.append ("file", file);
 395     if (time)
 396         form.append ("time", time);
 397     if (password)
 398         form.append ("key", password);
 399     if (one_time)
 400         form.append ("one_time_download", '1');
 401     req.send (form);
 402 }
 403
 404 function check_html5_file_api ()
 405 {
 406     return window.File && window.FileReader && window.FileList && window.Blob;
 407 }
 408
 409 var async_global_transfered = 0;
 410 var async_global_file;
 411 var async_global_ref = '';
 412 var async_global_max_size = 0;
 413 var async_global_time;
 414 var async_global_transfering = 0;
 415 var async_global_last_code;
 416
 417 function async_upload_start (max_size, file, time, password, one_time)
 418 {
 419     async_global_transfered = 0;
 420     async_global_file = file;
 421     async_global_max_size = max_size;
 422     async_global_time = time;
 423
 424     var req = new XMLHttpRequest ();
 425     req.addEventListener ("error", XHRErrorHandler, false);
 426     req.addEventListener ("abort", XHRErrorHandler, false);
 427     req.onreadystatechange = function ()
 428     {
 429         if (req.readyState == 4 && req.status == 200)
 430         {
 431             var res = req.responseText;
 432
 433             if (/^Error/.test(res))
 434             {
 435                 pop_failure (res);
 436                 return;
 437             }
 438
 439             res = res.split ("\n");
 440             async_global_ref = res[0];
 441             var code = res[1];
 442             async_upload_push (code);
 443         }
 444     }
 445     req.open ("POST", 'script.php?init_async' , true);
 446
 447     var form = new FormData();
 448     form.append ("filename", async_global_file.name);
 449     form.append ("type", async_global_file.type);
 450     if (time)
 451         form.append ("time", time);
 452     if (password)
 453         form.append ("key", password);
 454     if (one_time)
 455         form.append ("one_time_download", '1');
 456
 457     // Start time estimation
 458     upload_time_estimation_init(async_global_file.size);
 459
 460     req.send (form);
 461 }
 462
 463 function async_upload_progress (e)
 464 {
 465     if (e == undefined || e == null || !e.lengthComputable && async_global_file.size != 0)
 466         return;
 467
 468     // Compute percentage
 469     var p = Math.round ((e.loaded + async_global_transfered) * 100 / (async_global_file.size));
 470     var p_str = ' ';
 471     if (p != 100)
 472         p_str = p.toString() + '%';
 473     // Update estimation speed
 474     upload_time_estimation_add(e.loaded + async_global_transfered);
 475     // Get speed string
 476     var speed_str = upload_time_estimation_speed_string();
 477     speed_str = upload_speed_refresh_limiter(speed_str);
 478     // Get time string
 479     var time_str = chrono_update(upload_time_estimation_time());
 480
 481     show_upload_progression (p_str, speed_str, time_str);
 482 }
 483
 484 function async_upload_push (code)
 485 {
 486     async_global_last_code = code;
 487     if (async_global_transfered == async_global_file.size)
 488     {
 489         hide_upload_progression ();
 490         async_upload_end (code);
 491         return;
 492     }
 493     var req = new XMLHttpRequest ();
 494     req.upload.addEventListener ("progress", async_upload_progress, false);
 495     req.addEventListener ("error", XHRErrorHandler, false);
 496     req.addEventListener ("abort", XHRErrorHandler, false);
 497     req.onreadystatechange = function ()
 498     {
 499         if (req.readyState == 4)
 500         {
 501             if (req.status == 200)
 502             {
 503                 var res = req.responseText;
 504
 505                 // This error may be triggered when Jirafeau does not receive any file in POST.
 506                 // This may be due to bad php configuration where post_max_size is too low
 507                 // comparing to upload_max_filesize. Let's retry with lower file size.
 508                 if (res === "Error 23")
 509                 {
 510                     async_global_max_size = Math.max(1, async_global_max_size - 500);
 511                     async_upload_push (async_global_last_code);
 512                     return;
 513                 }
 514                 else if (/^Error/.test(res))
 515                 {
 516                     pop_failure (res);
 517                     return;
 518                 }
 519
 520                 res = res.split ("\n");
 521                 var code = res[0]
 522                 async_global_transfered = async_global_transfering;
 523                 async_upload_push (code);
 524                 return;
 525             }
 526             else
 527             {
 528                 // lower async_global_max_size and retry
 529                 // This can occurs in several cases:
 530                 // - Request Entity Too Large (413) due to server bad configuration relative to PHP configuration
 531                 // - Server Error (500) which can happen when PHP's `max_execution_time` is too low comparared to sent size
 532                 async_global_max_size = Math.max(1, parseInt (async_global_max_size * 0.5));
 533                 async_upload_push (async_global_last_code);
 534                 return;
 535             }
 536         }
 537     }
 538     req.open ("POST", 'script.php?push_async' , true);
 539
 540     var start = async_global_transfered;
 541     var end = start + async_global_max_size;
 542     if (end >= async_global_file.size)
 543         end = async_global_file.size;
 544     var blob = async_global_file.slice (start, end);
 545     async_global_transfering = end;
 546
 547     var form = new FormData();
 548     form.append ("ref", async_global_ref);
 549     form.append ("data", blob);
 550     form.append ("code", code);
 551     req.send (form);
 552 }
 553
 554 function async_upload_end (code)
 555 {
 556     var req = new XMLHttpRequest ();
 557     req.addEventListener ("error", XHRErrorHandler, false);
 558     req.addEventListener ("abort", XHRErrorHandler, false);
 559     req.onreadystatechange = function ()
 560     {
 561         if (req.readyState == 4 && req.status == 200)
 562         {
 563             var res = req.responseText;
 564
 565             if (/^Error/.test(res))
 566             {
 567                 pop_failure (res);
 568                 return;
 569             }
 570
 571             res = res.split ("\n");
 572             var expiryDate = '';
 573             if (async_global_time != 'none')
 574             {
 575               // convert time (local time + selected expiry date)
 576               var localDatetime = new Date();
 577               if(!add_time_string_to_date(localDatetime, async_global_time)) {
 578                 pop_failure ('Error: Date can not be parsed');
 579                 return;
 580               }
 581               expiryDate = localDatetime;
 582             }
 583
 584             show_link (res[0], res[1], res[2], expiryDate);
 585         }
 586     }
 587     req.open ("POST", 'script.php?end_async' , true);
 588
 589     var form = new FormData();
 590     form.append ("ref", async_global_ref);
 591     form.append ("code", code);
 592     req.send (form);
 593 }
 594
 595 function upload (max_chunk_size)
 596 {
 597     var one_time_checkbox = document.getElementById('one_time_download');
 598     var one_time = one_time_checkbox !== null ? one_time_checkbox.checked : false;
 599     if (check_html5_file_api ())
 600     {
 601         async_upload_start (
 602             max_chunk_size,
 603             document.getElementById('file_select').files[0],
 604             document.getElementById('select_time').value,
 605             document.getElementById('input_key').value,
 606             one_time
 607             );
 608     }
 609     else
 610     {
 611         classic_upload (
 612             document.getElementById('file_select').files[0],
 613             document.getElementById('select_time').value,
 614             document.getElementById('input_key').value,
 615             one_time
 616             );
 617     }
 618 }
 619
 620 var upload_time_estimation_total_size = 42;
 621 var upload_time_estimation_transfered_size = 42;
 622 var upload_time_estimation_transfered_date = 42;
 623 var upload_time_estimation_moving_average_speed = 42;
 624
 625 function upload_time_estimation_init(total_size)
 626 {
 627     upload_time_estimation_total_size = total_size;
 628     upload_time_estimation_transfered_size = 0;
 629     upload_time_estimation_moving_average_speed = 0;
 630     var d = new Date();
 631     upload_time_estimation_transfered_date = d.getTime();
 632 }
 633
 634 function upload_time_estimation_add(total_transfered_size)
 635 {
 636     // Let's compute the current speed
 637     var d = new Date();
 638     var speed = upload_time_estimation_moving_average_speed;
 639     if (d.getTime() - upload_time_estimation_transfered_date != 0) {
 640         speed = (total_transfered_size - upload_time_estimation_transfered_size)
 641                 / (d.getTime() - upload_time_estimation_transfered_date);
 642         speed = Math.max(0, speed);
 643     }
 644     // Let's compute moving average speed on 30 values
 645     var m = (upload_time_estimation_moving_average_speed * 29 + speed) / 30;
 646     // Update global values
 647     upload_time_estimation_transfered_size = total_transfered_size;
 648     upload_time_estimation_transfered_date = d.getTime();
 649     upload_time_estimation_moving_average_speed = m;
 650 }
 651
 652 function upload_time_estimation_speed_string()
 653 {
 654     // speed ms -> s
 655     var s = upload_time_estimation_moving_average_speed * 1000;
 656     var res = 0;
 657     var scale = '';
 658     if (s <= 1000)
 659     {
 660         res = s.toString();
 661         scale = "B/s";
 662     }
 663     else if (s < 1000000)
 664     {
 665         res = Math.floor(s/100) / 10;
 666         scale = "KB/s";
 667     }
 668     else
 669     {
 670         res = Math.floor(s/100000) / 10;
 671         scale = "MB/s";
 672     }
 673     if (res == 0)
 674         return '';
 675     return res.toString() + ' ' + scale;
 676 }
 677
 678 function milliseconds_to_time_string (milliseconds)
 679 {
 680     function numberEnding (number) {
 681         return (number > 1) ? translate ('PLURAL_ENDING') : '';
 682     }
 683
 684     var temp = Math.floor(milliseconds / 1000);
 685     var years = Math.floor(temp / 31536000);
 686     if (years) {
 687         return years + ' ' + translate ('YEAR') + numberEnding(years);
 688     }
 689     var days = Math.floor((temp %= 31536000) / 86400);
 690     if (days) {
 691         return days + ' ' + translate ('DAY') + numberEnding(days);
 692     }
 693     var hours = Math.floor((temp %= 86400) / 3600);
 694     if (hours) {
 695         return hours + ' ' + translate ('HOUR') + numberEnding(hours);
 696     }
 697     var minutes = Math.floor((temp %= 3600) / 60);
 698     if (minutes) {
 699         return minutes + ' ' + translate ('MINUTE') + numberEnding(minutes);
 700     }
 701     var seconds = temp % 60;
 702     if (seconds) {
 703         return seconds + ' ' + translate ('SECOND') + numberEnding(seconds);
 704     }
 705     return translate ('LESS_1_SEC');
 706 }
 707
 708 function upload_time_estimation_time()
 709 {
 710     // Estimate remaining time
 711     if (upload_time_estimation_moving_average_speed <= 0)
 712         return 0;
 713     return (upload_time_estimation_total_size - upload_time_estimation_transfered_size)
 714             / upload_time_estimation_moving_average_speed;
 715 }
 716
 717 var chrono_last_update = 0;
 718 var chrono_time_ms = 0;
 719 var chrono_time_ms_last_update = 0;
 720 function chrono_update(time_ms)
 721 {
 722     var d = new Date();
 723     var chrono = 0;
 724     // Don't update too often
 725     if (d.getTime() - chrono_last_update < 3000 &&
 726         chrono_time_ms_last_update > 0)
 727         chrono = chrono_time_ms;
 728     else
 729     {
 730         chrono_last_update = d.getTime();
 731         chrono_time_ms = time_ms;
 732         chrono = time_ms;
 733         chrono_time_ms_last_update = d.getTime();
 734     }
 735
 736     // Adjust chrono for smooth estimation
 737     chrono = chrono - (d.getTime() - chrono_time_ms_last_update);
 738
 739     // Let's update chronometer
 740     var time_str = '';
 741     if (chrono > 0)
 742         time_str = milliseconds_to_time_string (chrono);
 743     return time_str;
 744 }
 745
 746 var upload_speed_refresh_limiter_last_update = 0;
 747 var upload_speed_refresh_limiter_last_value = '';
 748 function upload_speed_refresh_limiter(speed_str)
 749 {
 750     var d = new Date();
 751     if (d.getTime() - upload_speed_refresh_limiter_last_update > 1500)
 752     {
 753         upload_speed_refresh_limiter_last_value = speed_str;
 754         upload_speed_refresh_limiter_last_update = d.getTime();
 755     }
 756     return upload_speed_refresh_limiter_last_value;
 757 }
 758
 759 // document.ready()
 760 document.addEventListener('DOMContentLoaded', function(event) {
 761     // Search for all datetime fields and convert the time to local timezone
 762     convertAllDatetimeFields();
 763 });
 764
 765 // Add copy event listeners
 766 function copyLinkToClipboard(link_id) {
 767     var focus = document.activeElement;
 768     var e = document.getElementById(link_id);
 769
 770     var tmp = document.createElement("textarea");
 771     document.body.appendChild(tmp);
 772     tmp.textContent = e.href;
 773     tmp.focus();
 774     tmp.setSelectionRange(0, tmp.value.length);
 775     document.execCommand("copy");
 776     document.body.removeChild(tmp);
 777
 778     focus.focus();
 779 }
 780
 781 function addCopyListener(button_id, link_id) {
 782     if(document.getElementById(button_id)){
 783         document.getElementById(button_id)
 784             .addEventListener("click", function() {
 785                 copyLinkToClipboard(link_id);});
 786     }
 787 }
 788
 789 function copyTextToClipboard(text_id){
 790     var copyText = document.getElementById(text_id);
 791     copyText.select();
 792     copyText.setSelectionRange(0, 99999);
 793     navigator.clipboard.writeText(copyText.value);
 794 }
 795
 796 function addTextCopyListener(button_id, text_id) {
 797     if(document.getElementById(button_id)){
 798         document.getElementById(button_id)
 799             .addEventListener("click", function() {
 800                 copyTextToClipboard(text_id);});
 801     }
 802 }
 803
 804 function set_dark_mode() {
 805     let steel_sheet = "<?php echo 'media/' . $cfg['dark_style'] . '/style.css.php'; ?>";
 806     let shortcut_icon = "<?php echo 'media/' . $cfg['dark_style'] . '/favicon.ico'; ?>";
 807     document.getElementById('stylesheet').href = steel_sheet;
 808     document.getElementById('shortcut_icon').href = shortcut_icon;
 809 }
 810
 811 function set_light_mode() {
 812     let steel_sheet = "<?php echo 'media/' . $cfg['style'] . '/style.css.php'; ?>";
 813     let shortcut_icon = "<?php echo 'media/' . $cfg['style'] . '/favicon.ico'; ?>";
 814     document.getElementById('stylesheet').href = steel_sheet;
 815     document.getElementById('shortcut_icon').href = shortcut_icon;
 816 }
 817
 818 function color_scheme_preferences() {
 819
 820     let dark_mode_steel_sheet = "<?php echo 'media/' . $cfg['dark_style'] . '/style.css.php'; ?>"
 821     if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
 822         set_dark_mode();
 823     } else {
 824         set_light_mode();
 825     }
 826
 827     // When user change its preference
 828     window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', lightMode => {
 829         lightMode.matches ? set_dark_mode() : set_light_mode();
 830     });
 831 }
 832
 833 // @license-end