1<?php 2/** 3 * webtrees: online genealogy 4 * Copyright (C) 2019 webtrees development team 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, either version 3 of the License, or 8 * (at your option) any later version. 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16declare(strict_types=1); 17 18namespace Fisharebest\Webtrees; 19 20use DomainException; 21use Fisharebest\ExtCalendar\GregorianCalendar; 22use Fisharebest\Webtrees\Date\AbstractCalendarDate; 23use Fisharebest\Webtrees\Date\FrenchDate; 24use Fisharebest\Webtrees\Date\GregorianDate; 25use Fisharebest\Webtrees\Date\HijriDate; 26use Fisharebest\Webtrees\Date\JalaliDate; 27use Fisharebest\Webtrees\Date\JewishDate; 28use Fisharebest\Webtrees\Date\JulianDate; 29use Fisharebest\Webtrees\Date\RomanDate; 30 31/** 32 * A representation of GEDCOM dates and date ranges. 33 * 34 * Since different calendars start their days at different times, (civil 35 * midnight, solar midnight, sunset, sunrise, etc.), we convert on the basis of 36 * midday. 37 * 38 * We assume that years start on the first day of the first month. Where 39 * this is not the case (e.g. England prior to 1752), we need to use modified 40 * years or the OS/NS notation "4 FEB 1750/51". 41 */ 42class Date 43{ 44 /** @var string Optional qualifier, such as BEF, FROM, ABT */ 45 public $qual1 = ''; 46 47 /** @var AbstractCalendarDate The first (or only) date */ 48 private $date1; 49 50 /** @var string Optional qualifier, such as TO, AND */ 51 public $qual2 = ''; 52 53 /** @var AbstractCalendarDate|null Optional second date */ 54 private $date2 = null; 55 56 /** @var string ptional text, as included with an INTerpreted date */ 57 private $text = ''; 58 59 /** 60 * Create a date, from GEDCOM data. 61 * 62 * @param string $date A date in GEDCOM format 63 */ 64 public function __construct(string $date) 65 { 66 // Extract any explanatory text 67 if (preg_match('/^(.*) ?[(](.*)[)]/', $date, $match)) { 68 $date = $match[1]; 69 $this->text = $match[2]; 70 } 71 if (preg_match('/^(FROM|BET) (.+) (AND|TO) (.+)/', $date, $match)) { 72 $this->qual1 = $match[1]; 73 $this->date1 = $this->parseDate($match[2]); 74 $this->qual2 = $match[3]; 75 $this->date2 = $this->parseDate($match[4]); 76 } elseif (preg_match('/^(TO|FROM|BEF|AFT|CAL|EST|INT|ABT) (.+)/', $date, $match)) { 77 $this->qual1 = $match[1]; 78 $this->date1 = $this->parseDate($match[2]); 79 } else { 80 $this->date1 = $this->parseDate($date); 81 } 82 } 83 84 /** 85 * When we copy a date object, we need to create copies of 86 * its child objects. 87 */ 88 public function __clone() 89 { 90 $this->date1 = clone $this->date1; 91 if ($this->date2 !== null) { 92 $this->date2 = clone $this->date2; 93 } 94 } 95 96 /** 97 * Convert a calendar date, such as "12 JUN 1943" into calendar date object. 98 * A GEDCOM date range may have two calendar dates. 99 * 100 * @param string $date 101 * 102 * @throws DomainException 103 * @return AbstractCalendarDate 104 */ 105 private function parseDate($date): AbstractCalendarDate 106 { 107 // Valid calendar escape specified? - use it 108 if (preg_match('/^(@#D(?:GREGORIAN|JULIAN|HEBREW|HIJRI|JALALI|FRENCH R|ROMAN)+@) ?(.*)/', $date, $match)) { 109 $cal = $match[1]; 110 $date = $match[2]; 111 } else { 112 $cal = ''; 113 } 114 // A date with a month: DM, M, MY or DMY 115 if (preg_match('/^(\d?\d?) ?(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC|TSH|CSH|KSL|TVT|SHV|ADR|ADS|NSN|IYR|SVN|TMZ|AAV|ELL|VEND|BRUM|FRIM|NIVO|PLUV|VENT|GERM|FLOR|PRAI|MESS|THER|FRUC|COMP|MUHAR|SAFAR|RABI[AT]|JUMA[AT]|RAJAB|SHAAB|RAMAD|SHAWW|DHUAQ|DHUAH|FARVA|ORDIB|KHORD|TIR|MORDA|SHAHR|MEHR|ABAN|AZAR|DEY|BAHMA|ESFAN) ?((?:\d{1,4}(?: B\.C\.)?|\d\d\d\d\/\d\d)?)$/', $date, $match)) { 116 $d = $match[1]; 117 $m = $match[2]; 118 $y = $match[3]; 119 } elseif (preg_match('/^(\d{1,4}(?: B\.C\.)?|\d\d\d\d\/\d\d)$/', $date, $match)) { 120 // A date with just a year 121 $d = ''; 122 $m = ''; 123 $y = $match[1]; 124 } else { 125 // An invalid date - do the best we can. 126 $d = ''; 127 $m = ''; 128 $y = ''; 129 // Look for a 3/4 digit year anywhere in the date 130 if (preg_match('/\b(\d{3,4})\b/', $date, $match)) { 131 $y = $match[1]; 132 } 133 // Look for a month anywhere in the date 134 if (preg_match('/(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC|TSH|CSH|KSL|TVT|SHV|ADR|ADS|NSN|IYR|SVN|TMZ|AAV|ELL|VEND|BRUM|FRIM|NIVO|PLUV|VENT|GERM|FLOR|PRAI|MESS|THER|FRUC|COMP|MUHAR|SAFAR|RABI[AT]|JUMA[AT]|RAJAB|SHAAB|RAMAD|SHAWW|DHUAQ|DHUAH|FARVA|ORDIB|KHORD|TIR|MORDA|SHAHR|MEHR|ABAN|AZAR|DEY|BAHMA|ESFAN)/', $date, $match)) { 135 $m = $match[1]; 136 // Look for a day number anywhere in the date 137 if (preg_match('/\b(\d\d?)\b/', $date, $match)) { 138 $d = $match[1]; 139 } 140 } 141 } 142 143 // Unambiguous dates - override calendar escape 144 if (preg_match('/^(TSH|CSH|KSL|TVT|SHV|ADR|ADS|NSN|IYR|SVN|TMZ|AAV|ELL)$/', $m)) { 145 $cal = JewishDate::ESCAPE; 146 } else { 147 if (preg_match('/^(VEND|BRUM|FRIM|NIVO|PLUV|VENT|GERM|FLOR|PRAI|MESS|THER|FRUC|COMP)$/', $m)) { 148 $cal = FrenchDate::ESCAPE; 149 } else { 150 if (preg_match('/^(MUHAR|SAFAR|RABI[AT]|JUMA[AT]|RAJAB|SHAAB|RAMAD|SHAWW|DHUAQ|DHUAH)$/', $m)) { 151 $cal = HijriDate::ESCAPE; // This is a WT extension 152 } else { 153 if (preg_match('/^(FARVA|ORDIB|KHORD|TIR|MORDA|SHAHR|MEHR|ABAN|AZAR|DEY|BAHMA|ESFAN)$/', $m)) { 154 $cal = JalaliDate::ESCAPE; // This is a WT extension 155 } elseif (preg_match('/^\d{1,4}( B\.C\.)|\d\d\d\d\/\d\d$/', $y)) { 156 $cal = JulianDate::ESCAPE; 157 } 158 } 159 } 160 } 161 162 // Ambiguous dates - don't override calendar escape 163 if ($cal == '') { 164 if (preg_match('/^(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)$/', $m)) { 165 $cal = GregorianDate::ESCAPE; 166 } else { 167 if (preg_match('/^[345]\d\d\d$/', $y)) { 168 // Year 3000-5999 169 $cal = JewishDate::ESCAPE; 170 } else { 171 $cal = GregorianDate::ESCAPE; 172 } 173 } 174 } 175 // Now construct an object of the correct type 176 switch ($cal) { 177 case GregorianDate::ESCAPE: 178 return new GregorianDate([ 179 $y, 180 $m, 181 $d, 182 ]); 183 case JulianDate::ESCAPE: 184 return new JulianDate([ 185 $y, 186 $m, 187 $d, 188 ]); 189 case JewishDate::ESCAPE: 190 return new JewishDate([ 191 $y, 192 $m, 193 $d, 194 ]); 195 case HijriDate::ESCAPE: 196 return new HijriDate([ 197 $y, 198 $m, 199 $d, 200 ]); 201 case FrenchDate::ESCAPE: 202 return new FrenchDate([ 203 $y, 204 $m, 205 $d, 206 ]); 207 case JalaliDate::ESCAPE: 208 return new JalaliDate([ 209 $y, 210 $m, 211 $d, 212 ]); 213 case RomanDate::ESCAPE: 214 return new RomanDate([ 215 $y, 216 $m, 217 $d, 218 ]); 219 default: 220 throw new DomainException('Invalid calendar'); 221 } 222 } 223 224 /** 225 * A list of supported calendars and their names. 226 * 227 * @return string[] 228 */ 229 public static function calendarNames(): array 230 { 231 return [ 232 /* I18N: The gregorian calendar */ 233 'gregorian' => I18N::translate('Gregorian'), 234 /* I18N: The julian calendar */ 235 'julian' => I18N::translate('Julian'), 236 /* I18N: The French calendar */ 237 'french' => I18N::translate('French'), 238 /* I18N: The Hebrew/Jewish calendar */ 239 'jewish' => I18N::translate('Jewish'), 240 /* I18N: The Arabic/Hijri calendar */ 241 'hijri' => I18N::translate('Hijri'), 242 /* I18N: The Persian/Jalali calendar */ 243 'jalali' => I18N::translate('Jalali'), 244 ]; 245 } 246 247 /** 248 * Convert a date to the preferred format and calendar(s) display. 249 * 250 * @param bool|null $url Wrap the date in a link to calendar.php 251 * @param string|null $date_format Override the default date format 252 * @param bool|null $convert_calendars Convert the date into other calendars 253 * 254 * @return string 255 */ 256 public function display($url = false, $date_format = null, $convert_calendars = true) 257 { 258 // Do we need a new DateFormatterService class? 259 $tree = app(Tree::class); 260 261 $CALENDAR_FORMAT = $tree->getPreference('CALENDAR_FORMAT'); 262 263 if ($date_format === null) { 264 $date_format = I18N::dateFormat(); 265 } 266 267 if ($convert_calendars) { 268 $calendar_format = explode('_and_', $CALENDAR_FORMAT); 269 } else { 270 $calendar_format = []; 271 } 272 273 // Two dates with text before, between and after 274 $q1 = $this->qual1; 275 $d1 = $this->date1->format($date_format, $this->qual1); 276 $q2 = $this->qual2; 277 if ($this->date2 === null) { 278 $d2 = ''; 279 } else { 280 $d2 = $this->date2->format($date_format, $this->qual2); 281 } 282 // Con vert to other calendars, if requested 283 $conv1 = ''; 284 $conv2 = ''; 285 foreach ($calendar_format as $cal_fmt) { 286 if ($cal_fmt != 'none') { 287 $d1conv = $this->date1->convertToCalendar($cal_fmt); 288 if ($d1conv->inValidRange()) { 289 $d1tmp = $d1conv->format($date_format, $this->qual1); 290 } else { 291 $d1tmp = ''; 292 } 293 if ($this->date2 === null) { 294 $d2conv = null; 295 $d2tmp = ''; 296 } else { 297 $d2conv = $this->date2->convertToCalendar($cal_fmt); 298 if ($d2conv->inValidRange()) { 299 $d2tmp = $d2conv->format($date_format, $this->qual2); 300 } else { 301 $d2tmp = ''; 302 } 303 } 304 // If the date is different from the unconverted date, add it to the date string. 305 if ($d1 != $d1tmp && $d1tmp !== '') { 306 if ($url) { 307 if ($CALENDAR_FORMAT !== 'none') { 308 $conv1 .= ' <span dir="' . I18N::direction() . '">(<a href="' . $d1conv->calendarUrl($date_format, $tree) . '" rel="nofollow">' . $d1tmp . '</a>)</span>'; 309 } else { 310 $conv1 .= ' <span dir="' . I18N::direction() . '"><br><a href="' . $d1conv->calendarUrl($date_format, $tree) . '" rel="nofollow">' . $d1tmp . '</a></span>'; 311 } 312 } else { 313 $conv1 .= ' <span dir="' . I18N::direction() . '">(' . $d1tmp . ')</span>'; 314 } 315 } 316 if ($this->date2 !== null && $d2 != $d2tmp && $d1tmp != '') { 317 if ($url) { 318 $conv2 .= ' <span dir="' . I18N::direction() . '">(<a href="' . $d2conv->calendarUrl($date_format, $tree) . '" rel="nofollow">' . $d2tmp . '</a>)</span>'; 319 } else { 320 $conv2 .= ' <span dir="' . I18N::direction() . '">(' . $d2tmp . ')</span>'; 321 } 322 } 323 } 324 } 325 326 // Add URLs, if requested 327 if ($url) { 328 $d1 = '<a href="' . $this->date1->calendarUrl($date_format, $tree) . '" rel="nofollow">' . $d1 . '</a>'; 329 if ($this->date2 instanceof AbstractCalendarDate) { 330 $d2 = '<a href="' . $this->date2->calendarUrl($date_format, $tree) . '" rel="nofollow">' . $d2 . '</a>'; 331 } 332 } 333 334 // Localise the date 335 switch ($q1 . $q2) { 336 case '': 337 $tmp = $d1 . $conv1; 338 break; 339 case 'ABT': 340 /* I18N: Gedcom ABT dates */ 341 $tmp = I18N::translate('about %s', $d1 . $conv1); 342 break; 343 case 'CAL': 344 /* I18N: Gedcom CAL dates */ 345 $tmp = I18N::translate('calculated %s', $d1 . $conv1); 346 break; 347 case 'EST': 348 /* I18N: Gedcom EST dates */ 349 $tmp = I18N::translate('estimated %s', $d1 . $conv1); 350 break; 351 case 'INT': 352 /* I18N: Gedcom INT dates */ 353 $tmp = I18N::translate('interpreted %s (%s)', $d1 . $conv1, e($this->text)); 354 break; 355 case 'BEF': 356 /* I18N: Gedcom BEF dates */ 357 $tmp = I18N::translate('before %s', $d1 . $conv1); 358 break; 359 case 'AFT': 360 /* I18N: Gedcom AFT dates */ 361 $tmp = I18N::translate('after %s', $d1 . $conv1); 362 break; 363 case 'FROM': 364 /* I18N: Gedcom FROM dates */ 365 $tmp = I18N::translate('from %s', $d1 . $conv1); 366 break; 367 case 'TO': 368 /* I18N: Gedcom TO dates */ 369 $tmp = I18N::translate('to %s', $d1 . $conv1); 370 break; 371 case 'BETAND': 372 /* I18N: Gedcom BET-AND dates */ 373 $tmp = I18N::translate('between %s and %s', $d1 . $conv1, $d2 . $conv2); 374 break; 375 case 'FROMTO': 376 /* I18N: Gedcom FROM-TO dates */ 377 $tmp = I18N::translate('from %s to %s', $d1 . $conv1, $d2 . $conv2); 378 break; 379 default: 380 $tmp = I18N::translate('Invalid date'); 381 break; 382 } 383 384 if (strip_tags($tmp) === '') { 385 return ''; 386 } 387 388 return '<span class="date">' . $tmp . '</span>'; 389 } 390 391 /** 392 * Get the earliest calendar date from this GEDCOM date. 393 * 394 * In the date “FROM 1900 TO 1910”, this would be 1900. 395 * 396 * @return AbstractCalendarDate 397 */ 398 public function minimumDate(): AbstractCalendarDate 399 { 400 return $this->date1; 401 } 402 403 /** 404 * Get the latest calendar date from this GEDCOM date. 405 * 406 * In the date “FROM 1900 TO 1910”, this would be 1910. 407 * 408 * @return AbstractCalendarDate 409 */ 410 public function maximumDate() 411 { 412 return $this->date2 ?? $this->date1; 413 } 414 415 /** 416 * Get the earliest Julian day number from this GEDCOM date. 417 * 418 * @return int 419 */ 420 public function minimumJulianDay(): int 421 { 422 return $this->minimumDate()->minimumJulianDay(); 423 } 424 425 /** 426 * Get the latest Julian day number from this GEDCOM date. 427 * 428 * @return int 429 */ 430 public function maximumJulianDay(): int 431 { 432 return $this->maximumDate()->maximumJulianDay(); 433 } 434 435 /** 436 * Get the middle Julian day number from the GEDCOM date. 437 * 438 * For a month-only date, this would be somewhere around the 16th day. 439 * For a year-only date, this would be somewhere around 1st July. 440 * 441 * @return int 442 */ 443 public function julianDay(): int 444 { 445 return intdiv($this->minimumJulianDay() + $this->maximumJulianDay(), 2); 446 } 447 448 /** 449 * Offset this date by N years, and round to the whole year. 450 * 451 * This is typically used to create an estimated death date, 452 * which is before a certain number of years after the birth date. 453 * 454 * @param int $years a number of years, positive or negative 455 * @param string $qualifier typically “BEF” or “AFT” 456 * 457 * @return Date 458 */ 459 public function addYears(int $years, string $qualifier = ''): Date 460 { 461 $tmp = clone $this; 462 $tmp->date1->year += $years; 463 $tmp->date1->month = 0; 464 $tmp->date1->day = 0; 465 $tmp->date1->setJdFromYmd(); 466 $tmp->qual1 = $qualifier; 467 $tmp->qual2 = ''; 468 $tmp->date2 = null; 469 470 return $tmp; 471 } 472 473 /** 474 * Calculate the the age of a person (n years), on a given date. 475 * 476 * @param Date $d1 477 * @param Date $d2 478 * 479 * @return int 480 */ 481 public static function getAgeYears(Date $d1, Date $d2): int 482 { 483 if ($d2->maximumJulianDay() >= $d1->minimumJulianDay() && $d2->minimumJulianDay() <= $d1->minimumJulianDay()) { 484 // Overlapping dates 485 $jd = $d1->minimumJulianDay(); 486 } else { 487 // Non-overlapping dates 488 $jd = $d2->minimumJulianDay(); 489 } 490 491 if ($jd && $d1->minimumJulianDay() && $d1->minimumJulianDay() <= $jd) { 492 return $d1->minimumDate()->getAge($jd); 493 } else { 494 return -1; 495 } 496 } 497 498 /** 499 * Calculate the the age of a person (n days), on a given date. 500 * 501 * @param Date $d1 502 * @param Date $d2 503 * 504 * @return int 505 */ 506 public static function getAgeDays(Date $d1, Date $d2): int 507 { 508 if ($d2->maximumJulianDay() >= $d1->minimumJulianDay() && $d2->minimumJulianDay() <= $d1->minimumJulianDay()) { 509 // Overlapping dates 510 $jd = $d1->minimumJulianDay(); 511 } else { 512 // Non-overlapping dates 513 $jd = $d2->minimumJulianDay(); 514 } 515 516 // Days - integer only (for sorting, rather than for display) 517 if ($jd && $d1->minimumJulianDay()) { 518 return $jd - $d1->minimumJulianDay(); 519 } else { 520 return -1; 521 } 522 } 523 524 /** 525 * Calculate the the age of a person, on a date. 526 * 527 * @param Date $d1 528 * @param Date|null $d2 529 * 530 * @return string 531 */ 532 public static function getAge(Date $d1, Date $d2 = null): string 533 { 534 if ($d2 instanceof Date) { 535 if ($d2->maximumJulianDay() >= $d1->minimumJulianDay() && $d2->minimumJulianDay() <= $d1->minimumJulianDay()) { 536 // Overlapping dates 537 $jd = $d1->minimumJulianDay(); 538 } else { 539 // Non-overlapping dates 540 $jd = $d2->minimumJulianDay(); 541 } 542 } else { 543 // If second date not specified, use today’s date 544 $jd = Carbon::now()->julianDay(); 545 } 546 547 // Just years, in local digits, with warning for negative/ 548 if ($jd && $d1->minimumJulianDay()) { 549 if ($d1->minimumJulianDay() > $jd) { 550 return view('icons/warning'); 551 } else { 552 $years = $d1->minimumDate()->getAge($jd); 553 554 return I18N::number($years); 555 } 556 } else { 557 return ''; 558 } 559 } 560 561 /** 562 * Calculate the years/months/days between two events 563 * Return a gedcom style age string: "1y 2m 3d" (for fact details) 564 * 565 * @param Date $d1 566 * @param Date|null $d2 567 * 568 * @return string 569 */ 570 public static function getAgeGedcom(Date $d1, Date $d2 = null) 571 { 572 if ($d2 === null) { 573 return $d1->date1->getAgeFull(Carbon::now()->julianDay()); 574 } 575 576 if (self::compare($d1, $d2) !== 0) { 577 return $d1->date1->getAgeFull($d2->minimumJulianDay()); 578 } 579 580 if ($d1->minimumJulianDay() == $d2->minimumJulianDay()) { 581 return '0d'; 582 } 583 584 return ''; 585 } 586 587 /** 588 * Compare two dates, so they can be sorted. 589 * 590 * return <0 if $a<$b 591 * return >0 if $b>$a 592 * return 0 if dates same/overlap 593 * BEF/AFT sort as the day before/after 594 * 595 * @param Date $a 596 * @param Date $b 597 * 598 * @return int 599 */ 600 public static function compare(Date $a, Date $b) 601 { 602 // Get min/max JD for each date. 603 switch ($a->qual1) { 604 case 'BEF': 605 $amin = $a->minimumJulianDay() - 1; 606 $amax = $amin; 607 break; 608 case 'AFT': 609 $amax = $a->maximumJulianDay() + 1; 610 $amin = $amax; 611 break; 612 default: 613 $amin = $a->minimumJulianDay(); 614 $amax = $a->maximumJulianDay(); 615 break; 616 } 617 switch ($b->qual1) { 618 case 'BEF': 619 $bmin = $b->minimumJulianDay() - 1; 620 $bmax = $bmin; 621 break; 622 case 'AFT': 623 $bmax = $b->maximumJulianDay() + 1; 624 $bmin = $bmax; 625 break; 626 default: 627 $bmin = $b->minimumJulianDay(); 628 $bmax = $b->maximumJulianDay(); 629 break; 630 } 631 if ($amax < $bmin) { 632 return -1; 633 } 634 635 if ($amin > $bmax && $bmax > 0) { 636 return 1; 637 } 638 639 if ($amin < $bmin && $amax <= $bmax) { 640 return -1; 641 } 642 643 if ($amin > $bmin && $amax >= $bmax && $bmax > 0) { 644 return 1; 645 } 646 647 return 0; 648 } 649 650 /** 651 * Check whether a gedcom date contains usable calendar date(s). 652 * 653 * An incomplete date such as "12 AUG" would be invalid, as 654 * we cannot sort it. 655 * 656 * @return bool 657 */ 658 public function isOK(): bool 659 { 660 return $this->minimumJulianDay() && $this->maximumJulianDay(); 661 } 662 663 /** 664 * Calculate the gregorian year for a date. This should NOT be used internally 665 * within WT - we should keep the code "calendar neutral" to allow support for 666 * jewish/arabic users. This is only for interfacing with external entities, 667 * such as the ancestry.com search interface or the dated fact icons. 668 * 669 * @return int 670 */ 671 public function gregorianYear() 672 { 673 if ($this->isOK()) { 674 $gregorian_calendar = new GregorianCalendar(); 675 [$year] = $gregorian_calendar->jdToYmd($this->julianDay()); 676 677 return $year; 678 } 679 680 return 0; 681 } 682} 683