[5341] | 1 | <?php |
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| 2 | /** |
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| 3 | * Name: When |
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| 4 | * Author: Thomas Planer <tplaner@gmail.com> |
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| 5 | * Location: http://github.com/tplaner/When |
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| 6 | * Created: September 2010 |
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| 7 | * Description: Determines the next date of recursion given an iCalendar "rrule" like pattern. |
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| 8 | * Requirements: PHP 5.3+ - makes extensive use of the Date and Time library (http://us2.php.net/manual/en/book.datetime.php) |
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| 9 | */ |
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| 10 | class When |
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| 11 | { |
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| 12 | protected $frequency; |
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| 13 | |
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| 14 | protected $start_date; |
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| 15 | protected $try_date; |
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| 16 | |
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| 17 | protected $end_date; |
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| 18 | |
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| 19 | protected $gobymonth; |
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| 20 | protected $bymonth; |
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| 21 | |
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| 22 | protected $gobyweekno; |
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| 23 | protected $byweekno; |
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| 24 | |
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| 25 | protected $gobyyearday; |
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| 26 | protected $byyearday; |
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| 27 | |
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| 28 | protected $gobymonthday; |
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| 29 | protected $bymonthday; |
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| 30 | |
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| 31 | protected $gobyday; |
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| 32 | protected $byday; |
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| 33 | |
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| 34 | protected $gobysetpos; |
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| 35 | protected $bysetpos; |
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| 36 | |
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| 37 | protected $suggestions; |
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| 38 | |
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| 39 | protected $count; |
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| 40 | protected $counter; |
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| 41 | |
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| 42 | protected $goenddate; |
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| 43 | |
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| 44 | protected $interval; |
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| 45 | |
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| 46 | protected $wkst; |
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| 47 | |
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| 48 | protected $valid_week_days; |
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| 49 | protected $valid_frequency; |
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| 50 | |
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| 51 | /** |
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| 52 | * __construct |
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| 53 | */ |
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| 54 | public function __construct() |
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| 55 | { |
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| 56 | $this->frequency = null; |
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| 57 | |
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| 58 | $this->gobymonth = false; |
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| 59 | $this->bymonth = range(1,12); |
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| 60 | |
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| 61 | $this->gobymonthday = false; |
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| 62 | $this->bymonthday = range(1,31); |
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| 63 | |
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| 64 | $this->gobyday = false; |
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| 65 | // setup the valid week days (0 = sunday) |
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| 66 | $this->byday = range(0,6); |
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| 67 | |
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| 68 | $this->gobyyearday = false; |
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| 69 | $this->byyearday = range(0,366); |
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| 70 | |
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| 71 | $this->gobysetpos = false; |
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| 72 | $this->bysetpos = range(1,366); |
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| 73 | |
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| 74 | $this->gobyweekno = false; |
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| 75 | // setup the range for valid weeks |
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| 76 | $this->byweekno = range(0,54); |
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| 77 | |
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| 78 | $this->suggestions = array(); |
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| 79 | |
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| 80 | // this will be set if a count() is specified |
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| 81 | $this->count = 0; |
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| 82 | // how many *valid* results we returned |
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| 83 | $this->counter = 0; |
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| 84 | |
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| 85 | // max date we'll return |
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| 86 | $this->end_date = new DateTime('9999-12-31'); |
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| 87 | |
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| 88 | // the interval to increase the pattern by |
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| 89 | $this->interval = 1; |
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| 90 | |
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| 91 | // what day does the week start on? (0 = sunday) |
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| 92 | $this->wkst = 0; |
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| 93 | |
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| 94 | $this->valid_week_days = array('SU', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA'); |
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| 95 | |
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| 96 | $this->valid_frequency = array('SECONDLY', 'MINUTELY', 'HOURLY', 'DAILY', 'WEEKLY', 'MONTHLY', 'YEARLY'); |
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| 97 | } |
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| 98 | |
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| 99 | /** |
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| 100 | * @param DateTime|string $start_date of the recursion - also is the first return value. |
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| 101 | * @param string $frequency of the recrusion, valid frequencies: secondly, minutely, hourly, daily, weekly, monthly, yearly |
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| 102 | */ |
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| 103 | public function recur($start_date, $frequency = "daily") |
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| 104 | { |
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| 105 | try |
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| 106 | { |
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| 107 | if(is_object($start_date)) |
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| 108 | { |
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| 109 | $this->start_date = clone $start_date; |
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| 110 | } |
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| 111 | else |
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| 112 | { |
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| 113 | // timestamps within the RFC have a 'Z' at the end of them, remove this. |
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| 114 | $start_date = trim($start_date, 'Z'); |
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| 115 | $this->start_date = new DateTime($start_date); |
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| 116 | } |
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| 117 | |
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| 118 | $this->try_date = clone $this->start_date; |
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| 119 | } |
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| 120 | catch(Exception $e) |
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| 121 | { |
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| 122 | throw new InvalidArgumentException('Invalid start date DateTime: ' . $e); |
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| 123 | } |
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| 124 | |
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| 125 | $this->freq($frequency); |
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| 126 | |
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| 127 | return $this; |
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| 128 | } |
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| 129 | |
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| 130 | public function freq($frequency) |
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| 131 | { |
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| 132 | if(in_array(strtoupper($frequency), $this->valid_frequency)) |
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| 133 | { |
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| 134 | $this->frequency = strtoupper($frequency); |
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| 135 | } |
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| 136 | else |
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| 137 | { |
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| 138 | throw new InvalidArgumentException('Invalid frequency type.'); |
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| 139 | } |
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| 140 | |
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| 141 | return $this; |
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| 142 | } |
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| 143 | |
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| 144 | // accepts an rrule directly |
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| 145 | public function rrule($rrule) |
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| 146 | { |
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| 147 | // strip off a trailing semi-colon |
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| 148 | $rrule = trim($rrule, ";"); |
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| 149 | |
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| 150 | $parts = explode(";", $rrule); |
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| 151 | |
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| 152 | foreach($parts as $part) |
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| 153 | { |
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| 154 | list($rule, $param) = explode("=", $part); |
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| 155 | |
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| 156 | $rule = strtoupper($rule); |
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| 157 | $param = strtoupper($param); |
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| 158 | |
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| 159 | switch($rule) |
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| 160 | { |
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| 161 | case "FREQ": |
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| 162 | $this->frequency = $param; |
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| 163 | break; |
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| 164 | case "UNTIL": |
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| 165 | $this->until($param); |
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| 166 | break; |
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| 167 | case "COUNT": |
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| 168 | $this->count($param); |
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| 169 | break; |
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| 170 | case "INTERVAL": |
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| 171 | $this->interval($param); |
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| 172 | break; |
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| 173 | case "BYDAY": |
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| 174 | $params = explode(",", $param); |
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| 175 | $this->byday($params); |
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| 176 | break; |
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| 177 | case "BYMONTHDAY": |
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| 178 | $params = explode(",", $param); |
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| 179 | $this->bymonthday($params); |
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| 180 | break; |
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| 181 | case "BYYEARDAY": |
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| 182 | $params = explode(",", $param); |
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| 183 | $this->byyearday($params); |
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| 184 | break; |
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| 185 | case "BYWEEKNO": |
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| 186 | $params = explode(",", $param); |
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| 187 | $this->byweekno($params); |
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| 188 | break; |
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| 189 | case "BYMONTH": |
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| 190 | $params = explode(",", $param); |
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| 191 | $this->bymonth($params); |
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| 192 | break; |
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| 193 | case "BYSETPOS": |
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| 194 | $params = explode(",", $param); |
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| 195 | $this->bysetpos($params); |
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| 196 | break; |
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| 197 | case "WKST": |
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| 198 | $this->wkst($param); |
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| 199 | break; |
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| 200 | } |
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| 201 | } |
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| 202 | |
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| 203 | return $this; |
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| 204 | } |
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| 205 | |
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| 206 | //max number of items to return based on the pattern |
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| 207 | public function count($count) |
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| 208 | { |
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| 209 | $this->count = (int)$count; |
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| 210 | |
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| 211 | return $this; |
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| 212 | } |
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| 213 | |
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| 214 | // how often the recurrence rule repeats |
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| 215 | public function interval($interval) |
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| 216 | { |
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| 217 | $this->interval = (int)$interval; |
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| 218 | |
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| 219 | return $this; |
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| 220 | } |
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| 221 | |
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| 222 | // starting day of the week |
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| 223 | public function wkst($day) |
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| 224 | { |
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| 225 | switch($day) |
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| 226 | { |
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| 227 | case 'SU': |
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| 228 | $this->wkst = 0; |
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| 229 | break; |
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| 230 | case 'MO': |
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| 231 | $this->wkst = 1; |
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| 232 | break; |
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| 233 | case 'TU': |
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| 234 | $this->wkst = 2; |
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| 235 | break; |
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| 236 | case 'WE': |
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| 237 | $this->wkst = 3; |
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| 238 | break; |
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| 239 | case 'TH': |
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| 240 | $this->wkst = 4; |
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| 241 | break; |
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| 242 | case 'FR': |
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| 243 | $this->wkst = 5; |
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| 244 | break; |
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| 245 | case 'SA': |
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| 246 | $this->wkst = 6; |
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| 247 | break; |
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| 248 | } |
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| 249 | |
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| 250 | return $this; |
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| 251 | } |
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| 252 | |
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| 253 | // max date |
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| 254 | public function until($end_date) |
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| 255 | { |
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| 256 | try |
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| 257 | { |
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| 258 | if(is_object($end_date)) |
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| 259 | { |
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| 260 | $this->end_date = clone $end_date; |
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| 261 | } |
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| 262 | else |
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| 263 | { |
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| 264 | // timestamps within the RFC have a 'Z' at the end of them, remove this. |
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| 265 | $end_date = trim($end_date, 'Z'); |
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| 266 | $this->end_date = new DateTime($end_date); |
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| 267 | } |
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| 268 | } |
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| 269 | catch(Exception $e) |
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| 270 | { |
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| 271 | throw new InvalidArgumentException('Invalid end date DateTime: ' . $e); |
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| 272 | } |
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| 273 | |
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| 274 | return $this; |
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| 275 | } |
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| 276 | |
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| 277 | public function bymonth($months) |
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| 278 | { |
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| 279 | if(is_array($months)) |
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| 280 | { |
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| 281 | $this->gobymonth = true; |
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| 282 | $this->bymonth = $months; |
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| 283 | } |
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| 284 | |
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| 285 | return $this; |
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| 286 | } |
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| 287 | |
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| 288 | public function bymonthday($days) |
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| 289 | { |
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| 290 | if(is_array($days)) |
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| 291 | { |
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| 292 | $this->gobymonthday = true; |
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| 293 | $this->bymonthday = $days; |
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| 294 | } |
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| 295 | |
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| 296 | return $this; |
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| 297 | } |
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| 298 | |
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| 299 | public function byweekno($weeks) |
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| 300 | { |
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| 301 | $this->gobyweekno = true; |
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| 302 | |
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| 303 | if(is_array($weeks)) |
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| 304 | { |
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| 305 | $this->byweekno = $weeks; |
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| 306 | } |
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| 307 | |
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| 308 | return $this; |
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| 309 | } |
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| 310 | |
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| 311 | public function bysetpos($days) |
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| 312 | { |
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| 313 | $this->gobysetpos = true; |
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| 314 | |
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| 315 | if(is_array($days)) |
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| 316 | { |
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| 317 | $this->bysetpos = $days; |
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| 318 | } |
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| 319 | |
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| 320 | return $this; |
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| 321 | } |
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| 322 | |
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| 323 | public function byday($days) |
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| 324 | { |
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| 325 | $this->gobyday = true; |
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| 326 | |
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| 327 | if(is_array($days)) |
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| 328 | { |
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| 329 | $this->byday = array(); |
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| 330 | foreach($days as $day) |
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| 331 | { |
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| 332 | $len = strlen($day); |
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| 333 | |
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| 334 | $as = '+'; |
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| 335 | |
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| 336 | // 0 mean no occurence is set |
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| 337 | $occ = 0; |
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| 338 | |
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| 339 | if($len == 3) |
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| 340 | { |
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| 341 | $occ = substr($day, 0, 1); |
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| 342 | } |
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| 343 | if($len == 4) |
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| 344 | { |
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| 345 | $as = substr($day, 0, 1); |
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| 346 | $occ = substr($day, 1, 1); |
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| 347 | } |
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| 348 | |
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| 349 | if($as == '-') |
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| 350 | { |
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| 351 | $occ = '-' . $occ; |
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| 352 | } |
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| 353 | else |
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| 354 | { |
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| 355 | $occ = '+' . $occ; |
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| 356 | } |
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| 357 | |
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| 358 | $day = substr($day, -2, 2); |
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| 359 | switch($day) |
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| 360 | { |
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| 361 | case 'SU': |
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| 362 | $this->byday[] = $occ . 'SU'; |
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| 363 | break; |
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| 364 | case 'MO': |
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| 365 | $this->byday[] = $occ . 'MO'; |
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| 366 | break; |
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| 367 | case 'TU': |
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| 368 | $this->byday[] = $occ . 'TU'; |
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| 369 | break; |
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| 370 | case 'WE': |
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| 371 | $this->byday[] = $occ . 'WE'; |
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| 372 | break; |
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| 373 | case 'TH': |
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| 374 | $this->byday[] = $occ . 'TH'; |
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| 375 | break; |
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| 376 | case 'FR': |
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| 377 | $this->byday[] = $occ . 'FR'; |
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| 378 | break; |
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| 379 | case 'SA': |
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| 380 | $this->byday[] = $occ . 'SA'; |
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| 381 | break; |
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| 382 | } |
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| 383 | } |
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| 384 | } |
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| 385 | |
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| 386 | return $this; |
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| 387 | } |
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| 388 | |
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| 389 | public function byyearday($days) |
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| 390 | { |
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| 391 | $this->gobyyearday = true; |
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| 392 | |
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| 393 | if(is_array($days)) |
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| 394 | { |
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| 395 | $this->byyearday = $days; |
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| 396 | } |
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| 397 | |
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| 398 | return $this; |
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| 399 | } |
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| 400 | |
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| 401 | // this creates a basic list of dates to "try" |
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| 402 | protected function create_suggestions() |
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| 403 | { |
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| 404 | switch($this->frequency) |
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| 405 | { |
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| 406 | case "YEARLY": |
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| 407 | $interval = 'year'; |
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| 408 | break; |
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| 409 | case "MONTHLY": |
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| 410 | $interval = 'month'; |
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| 411 | break; |
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| 412 | case "WEEKLY": |
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| 413 | $interval = 'week'; |
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| 414 | break; |
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| 415 | case "DAILY": |
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| 416 | $interval = 'day'; |
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| 417 | break; |
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| 418 | case "HOURLY": |
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| 419 | $interval = 'hour'; |
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| 420 | break; |
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| 421 | case "MINUTELY": |
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| 422 | $interval = 'minute'; |
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| 423 | break; |
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| 424 | case "SECONDLY": |
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| 425 | $interval = 'second'; |
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| 426 | break; |
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| 427 | } |
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| 428 | |
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| 429 | $month_day = $this->try_date->format('j'); |
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| 430 | $month = $this->try_date->format('n'); |
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| 431 | $year = $this->try_date->format('Y'); |
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| 432 | |
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| 433 | $timestamp = $this->try_date->format('H:i:s'); |
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| 434 | |
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| 435 | if($this->gobysetpos) |
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| 436 | { |
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| 437 | if($this->try_date == $this->start_date) |
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| 438 | { |
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| 439 | $this->suggestions[] = clone $this->try_date; |
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| 440 | } |
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| 441 | else |
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| 442 | { |
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| 443 | if($this->gobyday) |
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| 444 | { |
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| 445 | foreach($this->bysetpos as $_pos) |
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| 446 | { |
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| 447 | $tmp_array = array(); |
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| 448 | $_mdays = range(1, date('t',mktime(0,0,0,$month,1,$year))); |
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| 449 | foreach($_mdays as $_mday) |
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| 450 | { |
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| 451 | $date_time = new DateTime($year . '-' . $month . '-' . $_mday . ' ' . $timestamp); |
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| 452 | |
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| 453 | $occur = ceil($_mday / 7); |
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| 454 | |
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| 455 | $day_of_week = $date_time->format('l'); |
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| 456 | $dow_abr = strtoupper(substr($day_of_week, 0, 2)); |
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| 457 | |
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| 458 | // set the day of the month + (positive) |
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| 459 | $occur = '+' . $occur . $dow_abr; |
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| 460 | $occur_zero = '+0' . $dow_abr; |
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| 461 | |
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| 462 | // set the day of the month - (negative) |
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| 463 | $total_days = $date_time->format('t') - $date_time->format('j'); |
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| 464 | $occur_neg = '-' . ceil(($total_days + 1)/7) . $dow_abr; |
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| 465 | |
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| 466 | $day_from_end_of_month = $date_time->format('t') + 1 - $_mday; |
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| 467 | |
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| 468 | if(in_array($occur, $this->byday) || in_array($occur_zero, $this->byday) || in_array($occur_neg, $this->byday)) |
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| 469 | { |
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| 470 | $tmp_array[] = clone $date_time; |
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| 471 | } |
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| 472 | } |
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| 473 | |
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| 474 | if($_pos > 0) |
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| 475 | { |
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| 476 | $this->suggestions[] = clone $tmp_array[$_pos - 1]; |
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| 477 | } |
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| 478 | else |
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| 479 | { |
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| 480 | $this->suggestions[] = clone $tmp_array[count($tmp_array) + $_pos]; |
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| 481 | } |
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| 482 | |
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| 483 | } |
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| 484 | } |
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| 485 | } |
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| 486 | } |
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| 487 | elseif($this->gobyyearday) |
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| 488 | { |
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| 489 | foreach($this->byyearday as $_day) |
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| 490 | { |
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| 491 | if($_day >= 0) |
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| 492 | { |
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| 493 | $_day--; |
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| 494 | |
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| 495 | $_time = strtotime('+' . $_day . ' days', mktime(0, 0, 0, 1, 1, $year)); |
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| 496 | $this->suggestions[] = new Datetime(date('Y-m-d', $_time) . ' ' . $timestamp); |
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| 497 | } |
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| 498 | else |
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| 499 | { |
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| 500 | $year_day_neg = 365 + $_day; |
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| 501 | $leap_year = $this->try_date->format('L'); |
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| 502 | if($leap_year == 1) |
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| 503 | { |
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| 504 | $year_day_neg = 366 + $_day; |
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| 505 | } |
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| 506 | |
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| 507 | $_time = strtotime('+' . $year_day_neg . ' days', mktime(0, 0, 0, 1, 1, $year)); |
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| 508 | $this->suggestions[] = new Datetime(date('Y-m-d', $_time) . ' ' . $timestamp); |
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| 509 | } |
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| 510 | } |
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| 511 | } |
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| 512 | // special case because for years you need to loop through the months too |
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| 513 | elseif($this->gobyday && $interval == "year") |
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| 514 | { |
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| 515 | foreach($this->bymonth as $_month) |
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| 516 | { |
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| 517 | // this creates an array of days of the month |
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| 518 | $_mdays = range(1, date('t',mktime(0,0,0,$_month,1,$year))); |
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| 519 | foreach($_mdays as $_mday) |
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| 520 | { |
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| 521 | $date_time = new DateTime($year . '-' . $_month . '-' . $_mday . ' ' . $timestamp); |
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| 522 | |
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| 523 | // get the week of the month (1, 2, 3, 4, 5, etc) |
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| 524 | $week = $date_time->format('W'); |
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| 525 | |
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| 526 | if($date_time >= $this->start_date && in_array($week, $this->byweekno)) |
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| 527 | { |
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| 528 | $this->suggestions[] = clone $date_time; |
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| 529 | } |
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| 530 | } |
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| 531 | } |
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| 532 | } |
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| 533 | elseif($interval == "day") |
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| 534 | { |
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| 535 | $this->suggestions[] = clone $this->try_date; |
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| 536 | } |
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| 537 | elseif($interval == "week") |
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| 538 | { |
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| 539 | $this->suggestions[] = clone $this->try_date; |
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| 540 | |
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| 541 | if($this->gobyday) |
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| 542 | { |
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| 543 | $week_day = $this->try_date->format('w'); |
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| 544 | |
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| 545 | $days_in_month = $this->try_date->format('t'); |
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| 546 | |
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| 547 | $overflow_count = 1; |
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| 548 | $_day = $month_day; |
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| 549 | |
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| 550 | $run = true; |
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| 551 | while($run) |
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| 552 | { |
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[7655] | 553 | ++$_day; |
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[5341] | 554 | if($_day <= $days_in_month) |
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| 555 | { |
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| 556 | $tmp_date = new DateTime($year . '-' . $month . '-' . $_day . ' ' . $timestamp); |
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| 557 | } |
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| 558 | else |
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| 559 | { |
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| 560 | //$tmp_month = $month+1; |
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| 561 | $tmp_date = new DateTime($year . '-' . $month . '-' . $overflow_count . ' ' . $timestamp); |
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| 562 | $tmp_date->modify('+1 month'); |
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[7655] | 563 | ++$overflow_count; |
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[5341] | 564 | } |
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| 565 | |
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| 566 | $week_day = $tmp_date->format('w'); |
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| 567 | |
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| 568 | if($this->try_date == $this->start_date) |
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| 569 | { |
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| 570 | if($week_day == $this->wkst) |
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| 571 | { |
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| 572 | $this->try_date = clone $tmp_date; |
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| 573 | $this->try_date->modify('-7 days'); |
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| 574 | $run = false; |
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| 575 | } |
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| 576 | } |
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| 577 | |
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| 578 | if($week_day != $this->wkst) |
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| 579 | { |
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| 580 | $this->suggestions[] = clone $tmp_date; |
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| 581 | } |
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| 582 | else |
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| 583 | { |
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| 584 | $run = false; |
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| 585 | } |
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| 586 | } |
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| 587 | } |
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| 588 | } |
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| 589 | elseif($this->gobyday || $interval == "month") |
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| 590 | { |
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| 591 | $_mdays = range(1, date('t',mktime(0,0,0,$month,1,$year))); |
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| 592 | foreach($_mdays as $_mday) |
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| 593 | { |
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| 594 | $date_time = new DateTime($year . '-' . $month . '-' . $_mday . ' ' . $timestamp); |
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| 595 | |
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| 596 | // get the week of the month (1, 2, 3, 4, 5, etc) |
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| 597 | $week = $date_time->format('W'); |
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| 598 | |
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| 599 | if($date_time >= $this->start_date && in_array($week, $this->byweekno)) |
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| 600 | { |
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| 601 | $this->suggestions[] = clone $date_time; |
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| 602 | } |
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| 603 | } |
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| 604 | } |
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| 605 | elseif($this->gobymonth) |
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| 606 | { |
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| 607 | foreach($this->bymonth as $_month) |
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| 608 | { |
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| 609 | $date_time = new DateTime($year . '-' . $_month . '-' . $month_day . ' ' . $timestamp); |
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| 610 | |
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| 611 | if($date_time >= $this->start_date) |
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| 612 | { |
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| 613 | $this->suggestions[] = clone $date_time; |
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| 614 | } |
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| 615 | } |
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| 616 | } |
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| 617 | else |
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| 618 | { |
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| 619 | $this->suggestions[] = clone $this->try_date; |
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| 620 | } |
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| 621 | |
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| 622 | if($interval == "month") |
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| 623 | { |
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| 624 | $this->try_date->modify('last day of ' . $this->interval . ' ' . $interval); |
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| 625 | } |
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| 626 | else |
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| 627 | { |
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| 628 | $this->try_date->modify($this->interval . ' ' . $interval); |
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| 629 | } |
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| 630 | } |
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| 631 | |
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| 632 | protected function valid_date($date) |
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| 633 | { |
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| 634 | $year = $date->format('Y'); |
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| 635 | $month = $date->format('n'); |
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| 636 | $day = $date->format('j'); |
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| 637 | |
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| 638 | $year_day = $date->format('z') + 1; |
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| 639 | |
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| 640 | $year_day_neg = -366 + $year_day; |
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| 641 | $leap_year = $date->format('L'); |
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| 642 | if($leap_year == 1) |
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| 643 | { |
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| 644 | $year_day_neg = -367 + $year_day; |
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| 645 | } |
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| 646 | |
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| 647 | // this is the nth occurence of the date |
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| 648 | $occur = ceil($day / 7); |
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| 649 | |
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| 650 | $week = $date->format('W'); |
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| 651 | |
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| 652 | $day_of_week = $date->format('l'); |
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| 653 | $dow_abr = strtoupper(substr($day_of_week, 0, 2)); |
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| 654 | |
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| 655 | // set the day of the month + (positive) |
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| 656 | $occur = '+' . $occur . $dow_abr; |
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| 657 | $occur_zero = '+0' . $dow_abr; |
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| 658 | |
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| 659 | // set the day of the month - (negative) |
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| 660 | $total_days = $date->format('t') - $date->format('j'); |
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| 661 | $occur_neg = '-' . ceil(($total_days + 1)/7) . $dow_abr; |
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| 662 | |
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| 663 | $day_from_end_of_month = $date->format('t') + 1 - $day; |
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| 664 | |
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| 665 | if(in_array($month, $this->bymonth) && |
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| 666 | (in_array($occur, $this->byday) || in_array($occur_zero, $this->byday) || in_array($occur_neg, $this->byday)) && |
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| 667 | in_array($week, $this->byweekno) && |
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| 668 | (in_array($day, $this->bymonthday) || in_array(-$day_from_end_of_month, $this->bymonthday)) && |
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| 669 | (in_array($year_day, $this->byyearday) || in_array($year_day_neg, $this->byyearday))) |
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| 670 | { |
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| 671 | return true; |
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| 672 | } |
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| 673 | else |
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| 674 | { |
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| 675 | return false; |
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| 676 | } |
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| 677 | } |
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| 678 | |
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| 679 | // return the next valid DateTime object which matches the pattern and follows the rules |
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| 680 | public function next() |
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| 681 | { |
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| 682 | // check the counter is set |
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| 683 | if($this->count !== 0) |
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| 684 | { |
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| 685 | if($this->counter >= $this->count) |
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| 686 | { |
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| 687 | return false; |
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| 688 | } |
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| 689 | } |
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| 690 | |
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| 691 | // create initial set of suggested dates |
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| 692 | if(count($this->suggestions) === 0) |
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| 693 | { |
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| 694 | $this->create_suggestions(); |
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| 695 | } |
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| 696 | |
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| 697 | // loop through the suggested dates |
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| 698 | while(count($this->suggestions) > 0) |
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| 699 | { |
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| 700 | // get the first one on the array |
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| 701 | $try_date = array_shift($this->suggestions); |
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| 702 | |
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| 703 | // make sure the date doesn't exceed the max date |
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| 704 | if($try_date > $this->end_date) |
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| 705 | { |
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| 706 | return false; |
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| 707 | } |
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| 708 | |
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| 709 | // make sure it falls within the allowed days |
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| 710 | if($this->valid_date($try_date) === true) |
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| 711 | { |
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| 712 | $this->counter++; |
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| 713 | return $try_date; |
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| 714 | } |
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| 715 | else |
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| 716 | { |
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| 717 | // we might be out of suggested days, so load some more |
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| 718 | if(count($this->suggestions) === 0) |
---|
| 719 | { |
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| 720 | $this->create_suggestions(); |
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| 721 | } |
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| 722 | } |
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| 723 | } |
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| 724 | } |
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| 725 | } |
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