fisharebest /
webtrees
| Total Complexity | 106 |
| Total Lines | 547 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like Date often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Date, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 39 | class Date { |
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| 40 | /** @var string Optional qualifier, such as BEF, FROM, ABT */ |
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| 41 | public $qual1; |
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| 42 | |||
| 43 | /** @var CalendarDate The first (or only) date */ |
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| 44 | private $date1; |
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| 45 | |||
| 46 | /** @var string Optional qualifier, such as TO, AND*/ |
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| 47 | public $qual2; |
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| 48 | |||
| 49 | /** @var CalendarDate Optional second date */ |
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| 50 | private $date2; |
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| 51 | |||
| 52 | /** @var string ptional text, as included with an INTerpreted date */ |
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| 53 | private $text; |
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| 54 | |||
| 55 | /** |
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| 56 | * Create a date, from GEDCOM data. |
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| 57 | * |
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| 58 | * @param string $date A date in GEDCOM format |
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| 59 | */ |
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| 60 | public function __construct($date) { |
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| 61 | // Extract any explanatory text |
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| 62 | if (preg_match('/^(.*) ?[(](.*)[)]/', $date, $match)) { |
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| 63 | $date = $match[1]; |
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| 64 | $this->text = $match[2]; |
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| 65 | } |
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| 66 | if (preg_match('/^(FROM|BET) (.+) (AND|TO) (.+)/', $date, $match)) { |
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| 67 | $this->qual1 = $match[1]; |
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| 68 | $this->date1 = $this->parseDate($match[2]); |
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| 69 | $this->qual2 = $match[3]; |
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| 70 | $this->date2 = $this->parseDate($match[4]); |
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| 71 | } elseif (preg_match('/^(TO|FROM|BEF|AFT|CAL|EST|INT|ABT) (.+)/', $date, $match)) { |
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| 72 | $this->qual1 = $match[1]; |
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| 73 | $this->date1 = $this->parseDate($match[2]); |
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| 74 | } else { |
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| 75 | $this->date1 = $this->parseDate($date); |
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| 76 | } |
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| 77 | } |
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| 78 | |||
| 79 | /** |
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| 80 | * When we copy a date object, we need to create copies of |
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| 81 | * its child objects. |
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| 82 | */ |
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| 83 | public function __clone() { |
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| 84 | $this->date1 = clone $this->date1; |
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| 85 | if (is_object($this->date2)) { |
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| 86 | $this->date2 = clone $this->date2; |
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| 87 | } |
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| 88 | } |
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| 89 | |||
| 90 | /** |
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| 91 | * Convert a calendar date, such as "12 JUN 1943" into calendar date object. |
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| 92 | * |
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| 93 | * A GEDCOM date range may have two calendar dates. |
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| 94 | * |
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| 95 | * @param string $date |
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| 96 | * |
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| 97 | * @throws \DomainException |
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| 98 | * |
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| 99 | * @return CalendarDate |
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| 100 | */ |
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| 101 | private function parseDate($date) { |
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| 102 | // Valid calendar escape specified? - use it |
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| 103 | if (preg_match('/^(@#D(?:GREGORIAN|JULIAN|HEBREW|HIJRI|JALALI|FRENCH R|ROMAN)+@) ?(.*)/', $date, $match)) { |
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| 104 | $cal = $match[1]; |
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| 105 | $date = $match[2]; |
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| 106 | } else { |
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| 107 | $cal = ''; |
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| 108 | } |
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| 109 | // A date with a month: DM, M, MY or DMY |
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| 110 | if (preg_match('/^(\d?\d?) ?(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC|TSH|CSH|KSL|TVT|SHV|ADR|ADS|NSN|IYR|SVN|TMZ|AAV|ELL|VEND|BRUM|FRIM|NIVO|PLUV|VENT|GERM|FLOR|PRAI|MESS|THER|FRUC|COMP|MUHAR|SAFAR|RABI[AT]|JUMA[AT]|RAJAB|SHAAB|RAMAD|SHAWW|DHUAQ|DHUAH|FARVA|ORDIB|KHORD|TIR|MORDA|SHAHR|MEHR|ABAN|AZAR|DEY|BAHMA|ESFAN) ?((?:\d{1,4}(?: B\.C\.)?|\d\d\d\d\/\d\d)?)$/', $date, $match)) { |
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| 111 | $d = $match[1]; |
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| 112 | $m = $match[2]; |
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| 113 | $y = $match[3]; |
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| 114 | } elseif (preg_match('/^(\d{1,4}(?: B\.C\.)?|\d\d\d\d\/\d\d)$/', $date, $match)) { |
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| 115 | // A date with just a year |
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| 116 | $d = ''; |
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| 117 | $m = ''; |
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| 118 | $y = $match[1]; |
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| 119 | } else { |
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| 120 | // An invalid date - do the best we can. |
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| 121 | $d = ''; |
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| 122 | $m = ''; |
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| 123 | $y = ''; |
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| 124 | // Look for a 3/4 digit year anywhere in the date |
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| 125 | if (preg_match('/\b(\d{3,4})\b/', $date, $match)) { |
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| 126 | $y = $match[1]; |
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| 127 | } |
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| 128 | // Look for a month anywhere in the date |
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| 129 | 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)) { |
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| 130 | $m = $match[1]; |
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| 131 | // Look for a day number anywhere in the date |
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| 132 | if (preg_match('/\b(\d\d?)\b/', $date, $match)) { |
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| 133 | $d = $match[1]; |
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| 134 | } |
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| 135 | } |
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| 136 | } |
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| 137 | |||
| 138 | // Unambiguous dates - override calendar escape |
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| 139 | if (preg_match('/^(TSH|CSH|KSL|TVT|SHV|ADR|ADS|NSN|IYR|SVN|TMZ|AAV|ELL)$/', $m)) { |
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| 140 | $cal = '@#DHEBREW@'; |
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| 141 | } else { |
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| 142 | if (preg_match('/^(VEND|BRUM|FRIM|NIVO|PLUV|VENT|GERM|FLOR|PRAI|MESS|THER|FRUC|COMP)$/', $m)) { |
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| 143 | $cal = '@#DFRENCH R@'; |
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| 144 | } else { |
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| 145 | if (preg_match('/^(MUHAR|SAFAR|RABI[AT]|JUMA[AT]|RAJAB|SHAAB|RAMAD|SHAWW|DHUAQ|DHUAH)$/', $m)) { |
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| 146 | $cal = '@#DHIJRI@'; // This is a WT extension |
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| 147 | } else { |
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| 148 | if (preg_match('/^(FARVA|ORDIB|KHORD|TIR|MORDA|SHAHR|MEHR|ABAN|AZAR|DEY|BAHMA|ESFAN)$/', $m)) { |
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| 149 | $cal = '@#DJALALI@'; // This is a WT extension |
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| 150 | } elseif (preg_match('/^\d{1,4}( B\.C\.)|\d\d\d\d\/\d\d$/', $y)) { |
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| 151 | $cal = '@#DJULIAN@'; |
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| 152 | } |
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| 153 | } |
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| 154 | } |
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| 155 | } |
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| 156 | |||
| 157 | // Ambiguous dates - don't override calendar escape |
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| 158 | if ($cal == '') { |
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| 159 | if (preg_match('/^(JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)$/', $m)) { |
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| 160 | $cal = '@#DGREGORIAN@'; |
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| 161 | } else { |
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| 162 | if (preg_match('/^[345]\d\d\d$/', $y)) { |
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| 163 | // Year 3000-5999 |
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| 164 | $cal = '@#DHEBREW@'; |
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| 165 | } else { |
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| 166 | $cal = '@#DGREGORIAN@'; |
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| 167 | } |
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| 168 | } |
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| 169 | } |
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| 170 | // Now construct an object of the correct type |
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| 171 | switch ($cal) { |
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| 172 | case '@#DGREGORIAN@': |
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| 173 | return new GregorianDate([$y, $m, $d]); |
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| 174 | case '@#DJULIAN@': |
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| 175 | return new JulianDate([$y, $m, $d]); |
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| 176 | case '@#DHEBREW@': |
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| 177 | return new JewishDate([$y, $m, $d]); |
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| 178 | case '@#DHIJRI@': |
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| 179 | return new HijriDate([$y, $m, $d]); |
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| 180 | case '@#DFRENCH R@': |
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| 181 | return new FrenchDate([$y, $m, $d]); |
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| 182 | case '@#DJALALI@': |
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| 183 | return new JalaliDate([$y, $m, $d]); |
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| 184 | case '@#DROMAN@': |
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| 185 | return new RomanDate([$y, $m, $d]); |
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| 186 | default: |
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| 187 | throw new \DomainException('Invalid calendar'); |
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| 188 | } |
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| 189 | } |
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| 190 | |||
| 191 | /** |
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| 192 | * A list of supported calendars and their names. |
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| 193 | * |
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| 194 | * @return string[] |
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| 195 | */ |
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| 196 | public static function calendarNames() { |
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| 197 | return [ |
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| 198 | 'gregorian' => /* I18N: The gregorian calendar */ I18N::translate('Gregorian'), |
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| 199 | 'julian' => /* I18N: The julian calendar */ I18N::translate('Julian'), |
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| 200 | 'french' => /* I18N: The French calendar */ I18N::translate('French'), |
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| 201 | 'jewish' => /* I18N: The Hebrew/Jewish calendar */ I18N::translate('Jewish'), |
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| 202 | 'hijri' => /* I18N: The Arabic/Hijri calendar */ I18N::translate('Hijri'), |
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| 203 | 'jalali' => /* I18N: The Persian/Jalali calendar */ I18N::translate('Jalali'), |
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| 204 | ]; |
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| 205 | } |
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| 206 | |||
| 207 | /** |
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| 208 | * Convert a date to the preferred format and calendar(s) display. |
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| 209 | * |
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| 210 | * @param bool|null $url Wrap the date in a link to calendar.php |
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| 211 | * @param string|null $date_format Override the default date format |
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| 212 | * @param bool|null $convert_calendars Convert the date into other calendars |
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| 213 | * |
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| 214 | * @return string |
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| 215 | */ |
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| 216 | public function display($url = false, $date_format = null, $convert_calendars = true) { |
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| 217 | global $WT_TREE; |
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|
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| 218 | |||
| 219 | $CALENDAR_FORMAT = $WT_TREE->getPreference('CALENDAR_FORMAT'); |
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| 220 | |||
| 221 | if ($date_format === null) { |
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| 222 | $date_format = I18N::dateFormat(); |
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| 223 | } |
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| 224 | |||
| 225 | if ($convert_calendars) { |
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| 226 | $calendar_format = explode('_and_', $CALENDAR_FORMAT); |
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| 227 | } else { |
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| 228 | $calendar_format = []; |
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| 229 | } |
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| 230 | |||
| 231 | // Two dates with text before, between and after |
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| 232 | $q1 = $this->qual1; |
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| 233 | $d1 = $this->date1->format($date_format, $this->qual1); |
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| 234 | $q2 = $this->qual2; |
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| 235 | if (is_null($this->date2)) { |
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| 236 | $d2 = ''; |
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| 237 | } else { |
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| 238 | $d2 = $this->date2->format($date_format, $this->qual2); |
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| 239 | } |
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| 240 | // Con vert to other calendars, if requested |
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| 241 | $conv1 = ''; |
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| 242 | $conv2 = ''; |
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| 243 | foreach ($calendar_format as $cal_fmt) { |
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| 244 | if ($cal_fmt != 'none') { |
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| 245 | $d1conv = $this->date1->convertToCalendar($cal_fmt); |
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| 246 | if ($d1conv->inValidRange()) { |
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| 247 | $d1tmp = $d1conv->format($date_format, $this->qual1); |
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| 248 | } else { |
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| 249 | $d1tmp = ''; |
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| 250 | } |
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| 251 | if (is_null($this->date2)) { |
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| 252 | $d2conv = null; |
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| 253 | $d2tmp = ''; |
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| 254 | } else { |
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| 255 | $d2conv = $this->date2->convertToCalendar($cal_fmt); |
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| 256 | if ($d2conv->inValidRange()) { |
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| 257 | $d2tmp = $d2conv->format($date_format, $this->qual2); |
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| 258 | } else { |
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| 259 | $d2tmp = ''; |
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| 260 | } |
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| 261 | } |
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| 262 | // If the date is different from the unconverted date, add it to the date string. |
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| 263 | if ($d1 != $d1tmp && $d1tmp !== '') { |
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| 264 | if ($url) { |
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| 265 | if ($CALENDAR_FORMAT !== 'none') { |
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| 266 | $conv1 .= ' <span dir="' . I18N::direction() . '">(<a href="' . $d1conv->calendarUrl($date_format) . '" rel="nofollow">' . $d1tmp . '</a>)</span>'; |
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| 267 | } else { |
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| 268 | $conv1 .= ' <span dir="' . I18N::direction() . '"><br><a href="' . $d1conv->calendarUrl($date_format) . '" rel="nofollow">' . $d1tmp . '</a></span>'; |
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| 269 | } |
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| 270 | } else { |
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| 271 | $conv1 .= ' <span dir="' . I18N::direction() . '">(' . $d1tmp . ')</span>'; |
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| 272 | } |
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| 273 | } |
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| 274 | if (!is_null($this->date2) && $d2 != $d2tmp && $d1tmp != '') { |
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| 275 | if ($url) { |
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| 276 | $conv2 .= ' <span dir="' . I18N::direction() . '">(<a href="' . $d2conv->calendarUrl($date_format) . '" rel="nofollow">' . $d2tmp . '</a>)</span>'; |
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| 277 | } else { |
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| 278 | $conv2 .= ' <span dir="' . I18N::direction() . '">(' . $d2tmp . ')</span>'; |
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| 279 | } |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | |||
| 284 | // Add URLs, if requested |
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| 285 | if ($url) { |
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| 286 | $d1 = '<a href="' . $this->date1->calendarUrl($date_format) . '" rel="nofollow">' . $d1 . '</a>'; |
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| 287 | if (!is_null($this->date2)) { |
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| 288 | $d2 = '<a href="' . $this->date2->calendarUrl($date_format) . '" rel="nofollow">' . $d2 . '</a>'; |
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| 289 | } |
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| 290 | } |
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| 291 | |||
| 292 | // Localise the date |
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| 293 | switch ($q1 . $q2) { |
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| 294 | case '': |
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| 295 | $tmp = $d1 . $conv1; |
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| 296 | break; |
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| 297 | case 'ABT': |
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| 298 | $tmp = /* I18N: Gedcom ABT dates */ I18N::translate('about %s', $d1 . $conv1); |
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| 299 | break; |
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| 300 | case 'CAL': |
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| 301 | $tmp = /* I18N: Gedcom CAL dates */ I18N::translate('calculated %s', $d1 . $conv1); |
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| 302 | break; |
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| 303 | case 'EST': |
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| 304 | $tmp = /* I18N: Gedcom EST dates */ I18N::translate('estimated %s', $d1 . $conv1); |
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| 305 | break; |
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| 306 | case 'INT': |
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| 307 | $tmp = /* I18N: Gedcom INT dates */ I18N::translate('interpreted %s (%s)', $d1 . $conv1, $this->text); |
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| 308 | break; |
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| 309 | case 'BEF': |
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| 310 | $tmp = /* I18N: Gedcom BEF dates */ I18N::translate('before %s', $d1 . $conv1); |
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| 311 | break; |
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| 312 | case 'AFT': |
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| 313 | $tmp = /* I18N: Gedcom AFT dates */ I18N::translate('after %s', $d1 . $conv1); |
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| 314 | break; |
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| 315 | case 'FROM': |
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| 316 | $tmp = /* I18N: Gedcom FROM dates */ I18N::translate('from %s', $d1 . $conv1); |
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| 317 | break; |
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| 318 | case 'TO': |
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| 319 | $tmp = /* I18N: Gedcom TO dates */ I18N::translate('to %s', $d1 . $conv1); |
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| 320 | break; |
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| 321 | case 'BETAND': |
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| 322 | $tmp = /* I18N: Gedcom BET-AND dates */ I18N::translate('between %s and %s', $d1 . $conv1, $d2 . $conv2); |
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| 323 | break; |
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| 324 | case 'FROMTO': |
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| 325 | $tmp = /* I18N: Gedcom FROM-TO dates */ I18N::translate('from %s to %s', $d1 . $conv1, $d2 . $conv2); |
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| 326 | break; |
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| 327 | default: |
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| 328 | $tmp = I18N::translate('Invalid date'); |
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| 329 | break; // e.g. BET without AND |
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| 330 | } |
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| 331 | if ($this->text && !$q1) { |
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| 332 | $tmp = I18N::translate('%1$s (%2$s)', $tmp, $this->text); |
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| 333 | } |
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| 334 | |||
| 335 | if (strip_tags($tmp) === '') { |
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| 336 | return ''; |
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| 337 | } else { |
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| 338 | return '<span class="date">' . $tmp . '</span>'; |
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| 339 | } |
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| 340 | } |
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| 341 | |||
| 342 | /** |
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| 343 | * Get the earliest calendar date from this GEDCOM date. |
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| 344 | * |
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| 345 | * In the date “FROM 1900 TO 1910”, this would be 1900. |
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| 346 | * |
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| 347 | * @return CalendarDate |
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| 348 | */ |
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| 349 | public function minimumDate() { |
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| 350 | return $this->date1; |
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| 351 | } |
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| 352 | |||
| 353 | /** |
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| 354 | * Get the latest calendar date from this GEDCOM date. |
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| 355 | * |
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| 356 | * In the date “FROM 1900 TO 1910”, this would be 1910. |
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| 357 | * |
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| 358 | * @return CalendarDate |
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| 359 | */ |
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| 360 | public function maximumDate() { |
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| 361 | if (is_null($this->date2)) { |
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| 362 | return $this->date1; |
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| 363 | } else { |
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| 364 | return $this->date2; |
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| 365 | } |
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| 366 | } |
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| 367 | |||
| 368 | /** |
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| 369 | * Get the earliest Julian day number from this GEDCOM date. |
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| 370 | * |
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| 371 | * @return int |
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| 372 | */ |
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| 373 | public function minimumJulianDay() { |
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| 374 | return $this->minimumDate()->minJD; |
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| 375 | } |
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| 376 | |||
| 377 | /** |
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| 378 | * Get the latest Julian day number from this GEDCOM date. |
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| 379 | * |
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| 380 | * @return int |
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| 381 | */ |
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| 382 | public function maximumJulianDay() { |
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| 383 | return $this->maximumDate()->maxJD; |
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| 384 | } |
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| 385 | |||
| 386 | /** |
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| 387 | * Get the middle Julian day number from the GEDCOM date. |
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| 388 | * |
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| 389 | * For a month-only date, this would be somewhere around the 16th day. |
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| 390 | * For a year-only date, this would be somewhere around 1st July. |
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| 391 | * |
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| 392 | * @return int |
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| 393 | */ |
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| 394 | public function julianDay() { |
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| 395 | return (int) (($this->minimumJulianDay() + $this->maximumJulianDay()) / 2); |
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| 396 | } |
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| 397 | |||
| 398 | /** |
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| 399 | * Offset this date by N years, and round to the whole year. |
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| 400 | * |
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| 401 | * This is typically used to create an estimated death date, |
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| 402 | * which is before a certain number of years after the birth date. |
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| 403 | * |
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| 404 | * @param int $years a number of years, positive or negative |
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| 405 | * @param string $qualifier typically “BEF” or “AFT” |
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| 406 | * |
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| 407 | * @return Date |
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| 408 | */ |
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| 409 | public function addYears(int $years, string $qualifier = '') { |
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| 410 | $tmp = clone $this; |
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| 411 | $tmp->date1->y += $years; |
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| 412 | $tmp->date1->m = 0; |
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| 413 | $tmp->date1->d = 0; |
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| 414 | $tmp->date1->setJdFromYmd(); |
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| 415 | $tmp->qual1 = $qualifier; |
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| 416 | $tmp->qual2 = ''; |
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| 417 | $tmp->date2 = null; |
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| 418 | |||
| 419 | return $tmp; |
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| 420 | } |
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| 421 | |||
| 422 | /** |
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| 423 | * Calculate the the age of a person, on a date. |
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| 424 | * |
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| 425 | * @param Date $d1 |
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| 426 | * @param Date $d2 |
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| 427 | * @param int $format |
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| 428 | * |
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| 429 | * @throws \InvalidArgumentException |
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| 430 | * |
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| 431 | * @return int|string |
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| 432 | */ |
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| 433 | public static function getAge(Date $d1, Date $d2 = null, $format = 0) { |
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| 475 | } |
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| 476 | } |
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| 477 | |||
| 478 | /** |
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| 479 | * Calculate the years/months/days between two events |
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| 480 | * Return a gedcom style age string: "1y 2m 3d" (for fact details) |
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| 481 | * |
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| 482 | * @param Date $d1 |
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| 483 | * @param Date|null $d2 |
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| 484 | * |
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| 485 | * @return string |
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| 486 | */ |
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| 487 | public static function getAgeGedcom(Date $d1, Date $d2 = null) { |
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| 498 | } |
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| 499 | } |
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| 500 | } |
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| 501 | |||
| 502 | /** |
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| 503 | * Compare two dates, so they can be sorted. |
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| 504 | * |
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| 505 | * return <0 if $a<$b |
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| 506 | * return >0 if $b>$a |
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| 507 | * return 0 if dates same/overlap |
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| 508 | * BEF/AFT sort as the day before/after |
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| 509 | * |
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| 510 | * @param Date $a |
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| 511 | * @param Date $b |
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| 512 | * |
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| 513 | * @return int |
||
| 514 | */ |
||
| 515 | public static function compare(Date $a, Date $b) { |
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| 516 | // Get min/max JD for each date. |
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| 517 | switch ($a->qual1) { |
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| 518 | case 'BEF': |
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| 519 | $amin = $a->minimumJulianDay() - 1; |
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| 520 | $amax = $amin; |
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| 521 | break; |
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| 522 | case 'AFT': |
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| 523 | $amax = $a->maximumJulianDay() + 1; |
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| 524 | $amin = $amax; |
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| 525 | break; |
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| 526 | default: |
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| 527 | $amin = $a->minimumJulianDay(); |
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| 528 | $amax = $a->maximumJulianDay(); |
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| 529 | break; |
||
| 530 | } |
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| 531 | switch ($b->qual1) { |
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| 532 | case 'BEF': |
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| 533 | $bmin = $b->minimumJulianDay() - 1; |
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| 534 | $bmax = $bmin; |
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| 535 | break; |
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| 536 | case 'AFT': |
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| 537 | $bmax = $b->maximumJulianDay() + 1; |
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| 538 | $bmin = $bmax; |
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| 539 | break; |
||
| 540 | default: |
||
| 541 | $bmin = $b->minimumJulianDay(); |
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| 542 | $bmax = $b->maximumJulianDay(); |
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| 543 | break; |
||
| 544 | } |
||
| 545 | if ($amax < $bmin) { |
||
| 546 | return -1; |
||
| 547 | } elseif ($amin > $bmax && $bmax > 0) { |
||
| 548 | return 1; |
||
| 549 | } elseif ($amin < $bmin && $amax <= $bmax) { |
||
| 550 | return -1; |
||
| 551 | } elseif ($amin > $bmin && $amax >= $bmax && $bmax > 0) { |
||
| 552 | return 1; |
||
| 553 | } else { |
||
| 554 | return 0; |
||
| 555 | } |
||
| 556 | } |
||
| 557 | |||
| 558 | /** |
||
| 559 | * Check whether a gedcom date contains usable calendar date(s). |
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| 560 | * |
||
| 561 | * An incomplete date such as "12 AUG" would be invalid, as |
||
| 562 | * we cannot sort it. |
||
| 563 | * |
||
| 564 | * @return bool |
||
| 565 | */ |
||
| 566 | public function isOK() { |
||
| 568 | } |
||
| 569 | |||
| 570 | /** |
||
| 571 | * Calculate the gregorian year for a date. This should NOT be used internally |
||
| 572 | * within WT - we should keep the code "calendar neutral" to allow support for |
||
| 573 | * jewish/arabic users. This is only for interfacing with external entities, |
||
| 574 | * such as the ancestry.com search interface or the dated fact icons. |
||
| 575 | * |
||
| 576 | * @return int |
||
| 577 | */ |
||
| 578 | public function gregorianYear() { |
||
| 586 | } |
||
| 587 | } |
||
| 588 | } |
||
| 589 |
Loading history...
Instead of relying on
globalstate, we recommend one of these alternatives:1. Pass all data via parameters
2. Create a class that maintains your state