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<?php |
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namespace FamilyTree365\LaravelGedcom\Utils; |
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class DateParser |
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{ |
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private $year; |
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private $month; |
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private $day; |
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private $date_string; |
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public function __construct() |
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{ |
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$date_string = ''; |
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} |
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public function parse_date() |
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{ |
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$this->trim_datestring(); |
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if (!$this->try_parse_full_date()) { |
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if (!$this->try_parse_M_Y_date()) { |
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if (!$this->try_parse_Y_date()) { |
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$this->set_null_date(); |
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} |
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} |
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} |
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return $this->export(); |
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} |
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private function trim_datestring() |
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{ |
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$words_to_remove = [ |
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// If an exact date is not known, a date range can be specified |
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'AFT', 'BEF', 'BET', 'AND', |
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//For approximate dates |
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'ABT', 'CAL', 'EST', |
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// Takes a property over a certain period of time ( e.g. exercise of a profession, living in a particular place ) |
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'FROM', 'TO', |
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]; |
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foreach ($words_to_remove as $word) { |
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$this->date_string = str_replace($word, '', $this->date_string); |
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} |
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$this->date_string = trim($this->date_string); |
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} |
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private function try_parse_full_date() |
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{ |
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$this->set_null_date(); // Default |
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$date_parts = explode(' ', $this->date_string); |
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if (count($date_parts) > 3) { |
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return false; |
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} |
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return $this->try_get_day( |
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$date_parts[0] ?? false |
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) |
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and |
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$this->try_get_month( |
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$date_parts[1] ?? false |
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) |
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and |
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$this->try_get_year( |
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$date_parts[2] ?? false, |
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$date_parts[3] ?? false |
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); |
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} |
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private function try_parse_M_Y_date() |
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{ |
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$this->set_null_date(); // Default |
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$date_parts = explode(' ', $this->date_string); |
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if (count($date_parts) > 3) { |
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return false; |
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} |
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return $this->try_get_month( |
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$date_parts[0] ?? false |
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) |
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and |
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$this->try_get_year( |
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$date_parts[1] ?? false, |
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$date_parts[2] ?? false |
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); |
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} |
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private function try_parse_Y_date() |
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{ |
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$this->set_null_date(); // Default |
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$date_parts = explode(' ', $this->date_string); |
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if (count($date_parts) > 2) { |
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return false; |
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} |
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return $this->try_get_year( |
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$date_parts[0] ?? false, |
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$date_parts[1] ?? false |
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); |
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} |
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private function try_get_year($year, $epoch = false) |
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{ |
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$sign = 1; |
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if ($epoch) { |
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if ($epoch == 'BC') { |
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$sign = -1; |
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} elseif ($epoch == 'AC') { |
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$sign = 1; |
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} else { |
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return false; |
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} |
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} |
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if (!$year) { |
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return false; |
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} |
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if (is_numeric($year)) { |
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$this->year = $year * $sign; |
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} else { |
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return false; |
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} |
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return true; |
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} |
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private function try_get_month($month) |
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{ |
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$months = [ |
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'JAN' => 1, |
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'FEB' => 2, |
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'MAR' => 3, |
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'APR' => 4, |
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'MAY' => 5, |
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'JUN' => 6, |
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'JUL' => 7, |
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'AUG' => 8, |
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'SEP' => 9, |
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'OCT' => 10, |
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'NOV' => 11, |
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'DEC' => 12, |
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]; |
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if (isset($months[$month])) { |
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$this->month = $months[$month]; |
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return true; |
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} else { |
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return false; |
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} |
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} |
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private function try_get_day($day) |
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{ |
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if (is_numeric($day)) { |
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$this->day = $day * 1; |
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return true; |
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} else { |
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return false; |
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} |
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} |
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public function set_null_date() |
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{ |
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$this->year = null; |
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$this->month = null; |
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$this->day = null; |
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} |
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public function export() |
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{ |
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return [ |
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'year' => $this->year, |
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'month' => $this->month, |
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'day' => $this->day, |
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]; |
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} |
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} |
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