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| 1 | <?php |
| 2 | /** |
| 3 | * @author: Doug Wilbourne (dougwilbourne@gmail.com) |
| 4 | */ |
| 5 | |
| 6 | declare(strict_types=1); |
| 7 | |
| 8 | namespace pvc\parser\date_time; |
| 9 | |
| 10 | use DateTimeZone; |
| 11 | use IntlDateFormatter; |
| 12 | use pvc\interfaces\intl\LocaleInterface; |
| 13 | use pvc\interfaces\msg\MsgInterface; |
| 14 | use pvc\parser\err\InvalidDateTimeTypeException; |
| 15 | use pvc\parser\Parser; |
| 16 | |
| 17 | /** |
| 18 | * Class ParserDateTime |
| 19 | * @extends Parser<float> |
| 20 | * |
| 21 | * wrapper for the IntlDateFormatter class. |
| 22 | * parsedValue is a timestamp. This class has no notion of whether the pattern in IntlDateFormatter permits |
| 23 | * fractions of a second or not so the data type for the parsedValue (e.g. the generic data type for the class) |
| 24 | * is float, not int. |
| 25 | * |
| 26 | * The locale and timezone attributes look like they might be redundant because IntlDateFormatter also |
| 27 | * has those attributes. However, in order to keep everything pvc-branded (encapsulated), this object |
| 28 | * has properties which are the pvc implementations of these concepts. The IntlDateFormatter returns a string |
| 29 | * from getLocale and an IntlTimeZone object from getTimeZone, so the attributes in this class are just object instances |
| 30 | * of the correct type which can be returned from the getters. |
| 31 | */ |
| 32 | abstract class ParserDateTime extends Parser |
| 33 | { |
| 34 | |
| 35 | protected LocaleInterface $locale; |
| 36 | |
| 37 | protected DateTimeZone $timeZone; |
| 38 | |
| 39 | protected int $dateType; |
| 40 | |
| 41 | protected int $timeType; |
| 42 | |
| 43 | protected int $calendarType; |
| 44 | |
| 45 | public function __construct( |
| 46 | MsgInterface $msg, |
| 47 | LocaleInterface $locale, |
| 48 | DateTimeZone $timeZone, |
| 49 | ) { |
| 50 | parent::__construct($msg); |
| 51 | $this->setLocale($locale); |
| 52 | $this->setTimeZone($timeZone); |
| 53 | $this->setDateType(IntlDateFormatter::NONE); |
| 54 | $this->setTimeType(IntlDateFormatter::NONE); |
| 55 | $this->setCalendarType(IntlDateFormatter::GREGORIAN); |
| 56 | } |
| 57 | |
| 58 | public function getLocale(): LocaleInterface |
| 59 | { |
| 60 | return $this->locale; |
| 61 | } |
| 62 | |
| 63 | public function setLocale(LocaleInterface $locale): void |
| 64 | { |
| 65 | $this->locale = $locale; |
| 66 | } |
| 67 | |
| 68 | public function getTimeZone(): DateTimeZone |
| 69 | { |
| 70 | return $this->timeZone; |
| 71 | } |
| 72 | |
| 73 | public function setTimeZone(DateTimeZone $timeZone): void |
| 74 | { |
| 75 | $this->timeZone = $timeZone; |
| 76 | } |
| 77 | |
| 78 | public function getDateType(): int |
| 79 | { |
| 80 | return $this->dateType; |
| 81 | } |
| 82 | |
| 83 | public function setDateType(int $dateType): void |
| 84 | { |
| 85 | $validDateTypes = [ |
| 86 | IntlDateFormatter::NONE, |
| 87 | IntlDateFormatter::FULL, |
| 88 | IntlDateFormatter::LONG, |
| 89 | IntlDateFormatter::MEDIUM, |
| 90 | IntlDateFormatter::SHORT, |
| 91 | IntlDateFormatter::RELATIVE_FULL, |
| 92 | IntlDateFormatter::RELATIVE_LONG, |
| 93 | IntlDateFormatter::RELATIVE_MEDIUM, |
| 94 | IntlDateFormatter::RELATIVE_SHORT, |
| 95 | ]; |
| 96 | if (!in_array($dateType, $validDateTypes)) { |
| 97 | throw new InvalidDateTimeTypeException(); |
| 98 | } |
| 99 | $this->dateType = $dateType; |
| 100 | } |
| 101 | |
| 102 | public function getTimeType(): int |
| 103 | { |
| 104 | return $this->timeType; |
| 105 | } |
| 106 | |
| 107 | public function setTimeType(int $timeType): void |
| 108 | { |
| 109 | $validTimeTypes = [ |
| 110 | IntlDateFormatter::NONE, |
| 111 | IntlDateFormatter::FULL, |
| 112 | IntlDateFormatter::LONG, |
| 113 | IntlDateFormatter::MEDIUM, |
| 114 | IntlDateFormatter::SHORT, |
| 115 | ]; |
| 116 | if (!in_array($timeType, $validTimeTypes)) { |
| 117 | throw new InvalidDateTimeTypeException(); |
| 118 | } |
| 119 | $this->timeType = $timeType; |
| 120 | } |
| 121 | |
| 122 | public function getCalendarType(): int |
| 123 | { |
| 124 | return $this->calendarType; |
| 125 | } |
| 126 | |
| 127 | public function setCalendarType(int $calendarType): void |
| 128 | { |
| 129 | $validCalendarTypes = [IntlDateFormatter::GREGORIAN, IntlDateFormatter::TRADITIONAL]; |
| 130 | if (!in_array($calendarType, $validCalendarTypes)) { |
| 131 | throw new InvalidDateTimeTypeException(); |
| 132 | } |
| 133 | $this->calendarType = $calendarType; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * @function parseValue |
| 138 | * @param string $data |
| 139 | * @return bool |
| 140 | */ |
| 141 | public function parseValue(string $data): bool |
| 142 | { |
| 143 | $formatter = new IntlDateFormatter( |
| 144 | (string)$this->locale, |
| 145 | $this->getDateType(), |
| 146 | $this->getTimeType(), |
| 147 | $this->getTimeZone(), |
| 148 | $this->getCalendarType() |
| 149 | ); |
| 150 | $pos = 0; |
| 151 | $expectedPos = strlen($data); |
| 152 | $result = $formatter->parse($data, $pos); |
| 153 | |
| 154 | /** |
| 155 | * IntlDateFormatter 'fails gracefully' if it successfully parses a part of a string, e.g. it will not throw |
| 156 | * an exception if it parses the first x characters of the string into the return type and can't parse any |
| 157 | * more from the x + 1 character to the end of the string. The $pos variable holds the offset of the last |
| 158 | * character successfully parsed. |
| 159 | * |
| 160 | * There is also the possibility that it parses the whole string but the result is false. I came across an |
| 161 | * date time combination where this was the case: try parsing the date / time '5/9/96 23:14' with the en_US |
| 162 | * locale. It expects an am/pm designation and does not permit the hours to be more than 12. So it gets to |
| 163 | * the end of the string but the parse is unsuccessful. |
| 164 | * |
| 165 | */ |
| 166 | if (($pos == $expectedPos) && ($result !== false)) { |
| 167 | $this->parsedValue = $result; |
| 168 | return true; |
| 169 | } else { |
| 170 | return false; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | abstract protected function setMsgContent(MsgInterface $msg): void; |
| 175 | } |