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[friendica.git] / src / Util / DateTimeFormat.php

diff --git a/src/Util/DateTimeFormat.php b/src/Util/DateTimeFormat.php
index 31876d742b9419d8c45d342cbae31ffca4615b9e..e29420e9ea41c272dcbbb63868bc0ffac6972b0a 100644 (file)
--- a/src/Util/DateTimeFormat.php
+++ b/src/Util/DateTimeFormat.php
@@ -6,6 +6,7 @@
 
 namespace Friendica\Util;
 
+use Friendica\Core\Logger;
 use DateTime;
 use DateTimeZone;
 use Exception;
@@ -17,6 +18,7 @@ class DateTimeFormat
 {
        const ATOM = 'Y-m-d\TH:i:s\Z';
        const MYSQL = 'Y-m-d H:i:s';
+       const HTTP = 'D, d M Y H:i:s \G\M\T';
 
        /**
         * convert() shorthand for UTC.
@@ -24,6 +26,7 @@ class DateTimeFormat
         * @param string $time   A date/time string
         * @param string $format DateTime format string or Temporal constant
         * @return string
+        * @throws Exception
         */
        public static function utc($time, $format = self::MYSQL)
        {
@@ -36,6 +39,7 @@ class DateTimeFormat
         * @param string $time   A date/time string
         * @param string $format DateTime format string or Temporal constant
         * @return string
+        * @throws Exception
         */
        public static function local($time, $format = self::MYSQL)
        {
@@ -45,8 +49,10 @@ class DateTimeFormat
        /**
         * convert() shorthand for timezoned now.
         *
+        * @param        $timezone
         * @param string $format DateTime format string or Temporal constant
         * @return string
+        * @throws Exception
         */
        public static function timezoneNow($timezone, $format = self::MYSQL)
        {
@@ -58,6 +64,7 @@ class DateTimeFormat
         *
         * @param string $format DateTime format string or Temporal constant
         * @return string
+        * @throws Exception
         */
        public static function localNow($format = self::MYSQL)
        {
@@ -69,6 +76,7 @@ class DateTimeFormat
         *
         * @param string $format DateTime format string or Temporal constant
         * @return string
+        * @throws Exception
         */
        public static function utcNow($format = self::MYSQL)
        {
@@ -82,9 +90,10 @@ class DateTimeFormat
         * @param string $tz_to   Destination timezone
         * @param string $tz_from Source timezone
         * @param string $format  Output format recognised from php's DateTime class
-        *   http://www.php.net/manual/en/datetime.format.php
+        *                        http://www.php.net/manual/en/datetime.format.php
         *
         * @return string Formatted date according to given format
+        * @throws Exception
         */
        public static function convert($s = 'now', $tz_to = 'UTC', $tz_from = 'UTC', $format = self::MYSQL)
        {
@@ -109,6 +118,9 @@ class DateTimeFormat
                 * months and days always start with 1.
                 */
                if (substr($s, 0, 10) <= '0001-01-01') {
+                       if ($s < '0000-00-00') {
+                               $s = '0000-00-00';
+                       }
                        $d = new DateTime($s . ' + 32 days', new DateTimeZone('UTC'));
                        return str_replace('1', '0', $d->format($format));
                }
@@ -122,7 +134,7 @@ class DateTimeFormat
                try {
                        $d = new DateTime($s, $from_obj);
                } catch (Exception $e) {
-                       logger('DateTimeFormat::convert: exception: ' . $e->getMessage());
+                       Logger::log('DateTimeFormat::convert: exception: ' . $e->getMessage());
                        $d = new DateTime('now', $from_obj);
                }
 
@@ -136,4 +148,37 @@ class DateTimeFormat
 
                return $d->format($format);
        }
+
+       /**
+        * Checks, if the given string is a date with the pattern YYYY-MM
+        *
+        * @param string $dateString The given date
+        *
+        * @return boolean True, if the date is a valid pattern
+        */
+       public function isYearMonth(string $dateString)
+       {
+               // Check format (2019-01, 2019-1, 2019-10)
+               if (!preg_match('/^([12]\d{3}-(1[0-2]|0[1-9]|\d))$/', $dateString)) {
+                       return false;
+               }
+
+               $date = DateTime::createFromFormat('Y-m', $dateString);
+
+               if (!$date) {
+                       return false;
+               }
+
+               try {
+                       $now = new DateTime();
+               } catch (\Throwable $t) {
+                       return false;
+               }
+
+               if ($date > $now) {
+                       return false;
+               }
+
+               return true;
+       }
 }