First prototype
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+<?php
+# Generated by the protocol buffer compiler. DO NOT EDIT!
+# source: google/protobuf/timestamp.proto
+
+namespace Google\Protobuf;
+
+use Google\Protobuf\Internal\GPBType;
+use Google\Protobuf\Internal\RepeatedField;
+use Google\Protobuf\Internal\GPBUtil;
+
+/**
+ * A Timestamp represents a point in time independent of any time zone
+ * or calendar, represented as seconds and fractions of seconds at
+ * nanosecond resolution in UTC Epoch time. It is encoded using the
+ * Proleptic Gregorian Calendar which extends the Gregorian calendar
+ * backwards to year one. It is encoded assuming all minutes are 60
+ * seconds long, i.e. leap seconds are "smeared" so that no leap second
+ * table is needed for interpretation. Range is from
+ * 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z.
+ * By restricting to that range, we ensure that we can convert to
+ * and from RFC 3339 date strings.
+ * See [https://www.ietf.org/rfc/rfc3339.txt](https://www.ietf.org/rfc/rfc3339.txt).
+ * # Examples
+ * Example 1: Compute Timestamp from POSIX `time()`.
+ * Timestamp timestamp;
+ * timestamp.set_seconds(time(NULL));
+ * timestamp.set_nanos(0);
+ * Example 2: Compute Timestamp from POSIX `gettimeofday()`.
+ * struct timeval tv;
+ * gettimeofday(&tv, NULL);
+ * Timestamp timestamp;
+ * timestamp.set_seconds(tv.tv_sec);
+ * timestamp.set_nanos(tv.tv_usec * 1000);
+ * Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
+ * FILETIME ft;
+ * GetSystemTimeAsFileTime(&ft);
+ * UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
+ * // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
+ * // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
+ * Timestamp timestamp;
+ * timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
+ * timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
+ * Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
+ * long millis = System.currentTimeMillis();
+ * Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
+ * .setNanos((int) ((millis % 1000) * 1000000)).build();
+ * Example 5: Compute Timestamp from current time in Python.
+ * timestamp = Timestamp()
+ * timestamp.GetCurrentTime()
+ * # JSON Mapping
+ * In JSON format, the Timestamp type is encoded as a string in the
+ * [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
+ * format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
+ * where {year} is always expressed using four digits while {month}, {day},
+ * {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
+ * seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
+ * are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
+ * is required. A proto3 JSON serializer should always use UTC (as indicated by
+ * "Z") when printing the Timestamp type and a proto3 JSON parser should be
+ * able to accept both UTC and other timezones (as indicated by an offset).
+ * For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
+ * 01:30 UTC on January 15, 2017.
+ * In JavaScript, one can convert a Date object to this format using the
+ * standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString]
+ * method. In Python, a standard `datetime.datetime` object can be converted
+ * to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
+ * with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
+ * can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
+ * http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime--
+ * ) to obtain a formatter capable of generating timestamps in this format.
+ *
+ * Generated from protobuf message <code>google.protobuf.Timestamp</code>
+ */
+class Timestamp extends \Google\Protobuf\Internal\Message
+{
+ /**
+ * Represents seconds of UTC time since Unix epoch
+ * 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+ * 9999-12-31T23:59:59Z inclusive.
+ *
+ * Generated from protobuf field <code>int64 seconds = 1;</code>
+ */
+ private $seconds = 0;
+ /**
+ * Non-negative fractions of a second at nanosecond resolution. Negative
+ * second values with fractions must still have non-negative nanos values
+ * that count forward in time. Must be from 0 to 999,999,999
+ * inclusive.
+ *
+ * Generated from protobuf field <code>int32 nanos = 2;</code>
+ */
+ private $nanos = 0;
+
+ /**
+ * Constructor.
+ *
+ * @param array $data {
+ * Optional. Data for populating the Message object.
+ *
+ * @type int|string $seconds
+ * Represents seconds of UTC time since Unix epoch
+ * 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+ * 9999-12-31T23:59:59Z inclusive.
+ * @type int $nanos
+ * Non-negative fractions of a second at nanosecond resolution. Negative
+ * second values with fractions must still have non-negative nanos values
+ * that count forward in time. Must be from 0 to 999,999,999
+ * inclusive.
+ * }
+ */
+ public function __construct($data = NULL) {
+ \GPBMetadata\Google\Protobuf\Timestamp::initOnce();
+ parent::__construct($data);
+ }
+
+ /**
+ * Represents seconds of UTC time since Unix epoch
+ * 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+ * 9999-12-31T23:59:59Z inclusive.
+ *
+ * Generated from protobuf field <code>int64 seconds = 1;</code>
+ * @return int|string
+ */
+ public function getSeconds()
+ {
+ return $this->seconds;
+ }
+
+ /**
+ * Represents seconds of UTC time since Unix epoch
+ * 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
+ * 9999-12-31T23:59:59Z inclusive.
+ *
+ * Generated from protobuf field <code>int64 seconds = 1;</code>
+ * @param int|string $var
+ * @return $this
+ */
+ public function setSeconds($var)
+ {
+ GPBUtil::checkInt64($var);
+ $this->seconds = $var;
+
+ return $this;
+ }
+
+ /**
+ * Non-negative fractions of a second at nanosecond resolution. Negative
+ * second values with fractions must still have non-negative nanos values
+ * that count forward in time. Must be from 0 to 999,999,999
+ * inclusive.
+ *
+ * Generated from protobuf field <code>int32 nanos = 2;</code>
+ * @return int
+ */
+ public function getNanos()
+ {
+ return $this->nanos;
+ }
+
+ /**
+ * Non-negative fractions of a second at nanosecond resolution. Negative
+ * second values with fractions must still have non-negative nanos values
+ * that count forward in time. Must be from 0 to 999,999,999
+ * inclusive.
+ *
+ * Generated from protobuf field <code>int32 nanos = 2;</code>
+ * @param int $var
+ * @return $this
+ */
+ public function setNanos($var)
+ {
+ GPBUtil::checkInt32($var);
+ $this->nanos = $var;
+
+ return $this;
+ }
+
+ /*
+ * Converts PHP DateTime to Timestamp.
+ *
+ * @param \DateTime $datetime
+ */
+ public function fromDateTime(\DateTime $datetime)
+ {
+ $this->seconds = $datetime->getTimestamp();
+ $this->nanos = 1000 * $datetime->format('u');
+ }
+
+ /**
+ * Converts Timestamp to PHP DateTime.
+ *
+ * @return \DateTime $datetime
+ */
+ public function toDateTime()
+ {
+ $time = sprintf('%s.%06d', $this->seconds, $this->nanos / 1000);
+ return \DateTime::createFromFormat('U.u', $time);
+ }
+}
+