initial sabre upgrade (needs lots of work - to wit: authentication, redo the browser interface, and rework event export/import)

1 files changed, 604 insertions, 0 deletions

diff --git a/vendor/sabre/vobject/lib/FreeBusyGenerator.php b/vendor/sabre/vobject/lib/FreeBusyGenerator.php
new file mode 100644
index 000000000..e33621090
--- /dev/null
+++ b/vendor/sabre/vobject/lib/FreeBusyGenerator.php
@@ -0,0 +1,604 @@
+<?php
+
+namespace Sabre\VObject;
+
+use DateTimeInterface;
+use DateTimeImmutable;
+use DateTimeZone;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Recur\EventIterator;
+use Sabre\VObject\Recur\NoInstancesException;
+
+/**
+ * This class helps with generating FREEBUSY reports based on existing sets of
+ * objects.
+ *
+ * It only looks at VEVENT and VFREEBUSY objects from the sourcedata, and
+ * generates a single VFREEBUSY object.
+ *
+ * VFREEBUSY components are described in RFC5545, The rules for what should
+ * go in a single freebusy report is taken from RFC4791, section 7.10.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class FreeBusyGenerator {
+
+    /**
+     * Input objects.
+     *
+     * @var array
+     */
+    protected $objects = [];
+
+    /**
+     * Start of range.
+     *
+     * @var DateTimeInterface|null
+     */
+    protected $start;
+
+    /**
+     * End of range.
+     *
+     * @var DateTimeInterface|null
+     */
+    protected $end;
+
+    /**
+     * VCALENDAR object.
+     *
+     * @var Document
+     */
+    protected $baseObject;
+
+    /**
+     * Reference timezone.
+     *
+     * When we are calculating busy times, and we come across so-called
+     * floating times (times without a timezone), we use the reference timezone
+     * instead.
+     *
+     * This is also used for all-day events.
+     *
+     * This defaults to UTC.
+     *
+     * @var DateTimeZone
+     */
+    protected $timeZone;
+
+    /**
+     * A VAVAILABILITY document.
+     *
+     * If this is set, it's information will be included when calculating
+     * freebusy time.
+     *
+     * @var Document
+     */
+    protected $vavailability;
+
+    /**
+     * Creates the generator.
+     *
+     * Check the setTimeRange and setObjects methods for details about the
+     * arguments.
+     *
+     * @param DateTimeInterface $start
+     * @param DateTimeInterface $end
+     * @param mixed $objects
+     * @param DateTimeZone $timeZone
+     */
+    function __construct(DateTimeInterface $start = null, DateTimeInterface $end = null, $objects = null, DateTimeZone $timeZone = null) {
+
+        $this->setTimeRange($start, $end);
+
+        if ($objects) {
+            $this->setObjects($objects);
+        }
+        if (is_null($timeZone)) {
+            $timeZone = new DateTimeZone('UTC');
+        }
+        $this->setTimeZone($timeZone);
+
+    }
+
+    /**
+     * Sets the VCALENDAR object.
+     *
+     * If this is set, it will not be generated for you. You are responsible
+     * for setting things like the METHOD, CALSCALE, VERSION, etc..
+     *
+     * The VFREEBUSY object will be automatically added though.
+     *
+     * @param Document $vcalendar
+     * @return void
+     */
+    function setBaseObject(Document $vcalendar) {
+
+        $this->baseObject = $vcalendar;
+
+    }
+
+    /**
+     * Sets a VAVAILABILITY document.
+     *
+     * @param Document $vcalendar
+     * @return void
+     */
+    function setVAvailability(Document $vcalendar) {
+
+        $this->vavailability = $vcalendar;
+
+    }
+
+    /**
+     * Sets the input objects.
+     *
+     * You must either specify a valendar object as a string, or as the parse
+     * Component.
+     * It's also possible to specify multiple objects as an array.
+     *
+     * @param mixed $objects
+     *
+     * @return void
+     */
+    function setObjects($objects) {
+
+        if (!is_array($objects)) {
+            $objects = [$objects];
+        }
+
+        $this->objects = [];
+        foreach ($objects as $object) {
+
+            if (is_string($object)) {
+                $this->objects[] = Reader::read($object);
+            } elseif ($object instanceof Component) {
+                $this->objects[] = $object;
+            } else {
+                throw new \InvalidArgumentException('You can only pass strings or \\Sabre\\VObject\\Component arguments to setObjects');
+            }
+
+        }
+
+    }
+
+    /**
+     * Sets the time range.
+     *
+     * Any freebusy object falling outside of this time range will be ignored.
+     *
+     * @param DateTimeInterface $start
+     * @param DateTimeInterface $end
+     *
+     * @return void
+     */
+    function setTimeRange(DateTimeInterface $start = null, DateTimeInterface $end = null) {
+
+        if (!$start) {
+            $start = new DateTimeImmutable(Settings::$minDate);
+        }
+        if (!$end) {
+            $end = new DateTimeImmutable(Settings::$maxDate);
+        }
+        $this->start = $start;
+        $this->end = $end;
+
+    }
+
+    /**
+     * Sets the reference timezone for floating times.
+     *
+     * @param DateTimeZone $timeZone
+     *
+     * @return void
+     */
+    function setTimeZone(DateTimeZone $timeZone) {
+
+        $this->timeZone = $timeZone;
+
+    }
+
+    /**
+     * Parses the input data and returns a correct VFREEBUSY object, wrapped in
+     * a VCALENDAR.
+     *
+     * @return Component
+     */
+    function getResult() {
+
+        $fbData = new FreeBusyData(
+            $this->start->getTimeStamp(),
+            $this->end->getTimeStamp()
+        );
+        if ($this->vavailability) {
+
+            $this->calculateAvailability($fbData, $this->vavailability);
+
+        }
+
+        $this->calculateBusy($fbData, $this->objects);
+
+        return $this->generateFreeBusyCalendar($fbData);
+
+
+    }
+
+    /**
+     * This method takes a VAVAILABILITY component and figures out all the
+     * available times.
+     *
+     * @param FreeBusyData $fbData
+     * @param VCalendar $vavailability
+     * @return void
+     */
+    protected function calculateAvailability(FreeBusyData $fbData, VCalendar $vavailability) {
+
+        $vavailComps = iterator_to_array($vavailability->VAVAILABILITY);
+        usort(
+            $vavailComps,
+            function($a, $b) {
+
+                // We need to order the components by priority. Priority 1
+                // comes first, up until priority 9. Priority 0 comes after
+                // priority 9. No priority implies priority 0.
+                //
+                // Yes, I'm serious.
+                $priorityA = isset($a->PRIORITY) ? (int)$a->PRIORITY->getValue() : 0;
+                $priorityB = isset($b->PRIORITY) ? (int)$b->PRIORITY->getValue() : 0;
+
+                if ($priorityA === 0) $priorityA = 10;
+                if ($priorityB === 0) $priorityB = 10;
+
+                return $priorityA - $priorityB;
+
+            }
+        );
+
+        // Now we go over all the VAVAILABILITY components and figure if
+        // there's any we don't need to consider.
+        //
+        // This is can be because of one of two reasons: either the
+        // VAVAILABILITY component falls outside the time we are interested in,
+        // or a different VAVAILABILITY component with a higher priority has
+        // already completely covered the time-range.
+        $old = $vavailComps;
+        $new = [];
+
+        foreach ($old as $vavail) {
+
+            list($compStart, $compEnd) = $vavail->getEffectiveStartEnd();
+
+            // We don't care about datetimes that are earlier or later than the
+            // start and end of the freebusy report, so this gets normalized
+            // first.
+            if (is_null($compStart) || $compStart < $this->start) {
+                $compStart = $this->start;
+            }
+            if (is_null($compEnd) || $compEnd > $this->end) {
+                $compEnd = $this->end;
+            }
+
+            // If the item fell out of the timerange, we can just skip it.
+            if ($compStart > $this->end || $compEnd < $this->start) {
+                continue;
+            }
+
+            // Going through our existing list of components to see if there's
+            // a higher priority component that already fully covers this one.
+            foreach ($new as $higherVavail) {
+
+                list($higherStart, $higherEnd) = $higherVavail->getEffectiveStartEnd();
+                if (
+                    (is_null($higherStart) || $higherStart < $compStart) &&
+                    (is_null($higherEnd)   || $higherEnd > $compEnd)
+                ) {
+
+                    // Component is fully covered by a higher priority
+                    // component. We can skip this component.
+                    continue 2;
+
+                }
+
+            }
+
+            // We're keeping it!
+            $new[] = $vavail;
+
+        }
+
+        // Lastly, we need to traverse the remaining components and fill in the
+        // freebusydata slots.
+        //
+        // We traverse the components in reverse, because we want the higher
+        // priority components to override the lower ones.
+        foreach (array_reverse($new) as $vavail) {
+
+            $busyType = isset($vavail->BUSYTYPE) ? strtoupper($vavail->BUSYTYPE) : 'BUSY-UNAVAILABLE';
+            list($vavailStart, $vavailEnd) = $vavail->getEffectiveStartEnd();
+
+            // Making the component size no larger than the requested free-busy
+            // report range.
+            if (!$vavailStart || $vavailStart < $this->start) {
+                $vavailStart = $this->start;
+            }
+            if (!$vavailEnd || $vavailEnd > $this->end) {
+                $vavailEnd = $this->end;
+            }
+
+            // Marking the entire time range of the VAVAILABILITY component as
+            // busy.
+            $fbData->add(
+                $vavailStart->getTimeStamp(),
+                $vavailEnd->getTimeStamp(),
+                $busyType
+            );
+
+            // Looping over the AVAILABLE components.
+            if (isset($vavail->AVAILABLE)) foreach ($vavail->AVAILABLE as $available) {
+
+                list($availStart, $availEnd) = $available->getEffectiveStartEnd();
+                $fbData->add(
+                    $availStart->getTimeStamp(),
+                    $availEnd->getTimeStamp(),
+                    'FREE'
+                );
+
+                if ($available->RRULE) {
+                    // Our favourite thing: recurrence!!
+
+                    $rruleIterator = new Recur\RRuleIterator(
+                        $available->RRULE->getValue(),
+                        $availStart
+                    );
+                    $rruleIterator->fastForward($vavailStart);
+
+                    $startEndDiff = $availStart->diff($availEnd);
+
+                    while ($rruleIterator->valid()) {
+
+                        $recurStart = $rruleIterator->current();
+                        $recurEnd = $recurStart->add($startEndDiff);
+
+                        if ($recurStart > $vavailEnd) {
+                            // We're beyond the legal timerange.
+                            break;
+                        }
+
+                        if ($recurEnd > $vavailEnd) {
+                            // Truncating the end if it exceeds the
+                            // VAVAILABILITY end.
+                            $recurEnd = $vavailEnd;
+                        }
+
+                        $fbData->add(
+                            $recurStart->getTimeStamp(),
+                            $recurEnd->getTimeStamp(),
+                            'FREE'
+                        );
+
+                        $rruleIterator->next();
+
+                    }
+                }
+
+            }
+
+        }
+
+    }
+
+    /**
+     * This method takes an array of iCalendar objects and applies its busy
+     * times on fbData.
+     *
+     * @param FreeBusyData $fbData
+     * @param VCalendar[] $objects
+     */
+    protected function calculateBusy(FreeBusyData $fbData, array $objects) {
+
+        foreach ($objects as $key => $object) {
+
+            foreach ($object->getBaseComponents() as $component) {
+
+                switch ($component->name) {
+
+                    case 'VEVENT' :
+
+                        $FBTYPE = 'BUSY';
+                        if (isset($component->TRANSP) && (strtoupper($component->TRANSP) === 'TRANSPARENT')) {
+                            break;
+                        }
+                        if (isset($component->STATUS)) {
+                            $status = strtoupper($component->STATUS);
+                            if ($status === 'CANCELLED') {
+                                break;
+                            }
+                            if ($status === 'TENTATIVE') {
+                                $FBTYPE = 'BUSY-TENTATIVE';
+                            }
+                        }
+
+                        $times = [];
+
+                        if ($component->RRULE) {
+                            try {
+                                $iterator = new EventIterator($object, (string)$component->UID, $this->timeZone);
+                            } catch (NoInstancesException $e) {
+                                // This event is recurring, but it doesn't have a single
+                                // instance. We are skipping this event from the output
+                                // entirely.
+                                unset($this->objects[$key]);
+                                continue;
+                            }
+
+                            if ($this->start) {
+                                $iterator->fastForward($this->start);
+                            }
+
+                            $maxRecurrences = Settings::$maxRecurrences;
+
+                            while ($iterator->valid() && --$maxRecurrences) {
+
+                                $startTime = $iterator->getDTStart();
+                                if ($this->end && $startTime > $this->end) {
+                                    break;
+                                }
+                                $times[] = [
+                                    $iterator->getDTStart(),
+                                    $iterator->getDTEnd(),
+                                ];
+
+                                $iterator->next();
+
+                            }
+
+                        } else {
+
+                            $startTime = $component->DTSTART->getDateTime($this->timeZone);
+                            if ($this->end && $startTime > $this->end) {
+                                break;
+                            }
+                            $endTime = null;
+                            if (isset($component->DTEND)) {
+                                $endTime = $component->DTEND->getDateTime($this->timeZone);
+                            } elseif (isset($component->DURATION)) {
+                                $duration = DateTimeParser::parseDuration((string)$component->DURATION);
+                                $endTime = clone $startTime;
+                                $endTime = $endTime->add($duration);
+                            } elseif (!$component->DTSTART->hasTime()) {
+                                $endTime = clone $startTime;
+                                $endTime = $endTime->modify('+1 day');
+                            } else {
+                                // The event had no duration (0 seconds)
+                                break;
+                            }
+
+                            $times[] = [$startTime, $endTime];
+
+                        }
+
+                        foreach ($times as $time) {
+
+                            if ($this->end && $time[0] > $this->end) break;
+                            if ($this->start && $time[1] < $this->start) break;
+
+                            $fbData->add(
+                                $time[0]->getTimeStamp(),
+                                $time[1]->getTimeStamp(),
+                                $FBTYPE
+                            );
+                        }
+                        break;
+
+                    case 'VFREEBUSY' :
+                        foreach ($component->FREEBUSY as $freebusy) {
+
+                            $fbType = isset($freebusy['FBTYPE']) ? strtoupper($freebusy['FBTYPE']) : 'BUSY';
+
+                            // Skipping intervals marked as 'free'
+                            if ($fbType === 'FREE')
+                                continue;
+
+                            $values = explode(',', $freebusy);
+                            foreach ($values as $value) {
+                                list($startTime, $endTime) = explode('/', $value);
+                                $startTime = DateTimeParser::parseDateTime($startTime);
+
+                                if (substr($endTime, 0, 1) === 'P' || substr($endTime, 0, 2) === '-P') {
+                                    $duration = DateTimeParser::parseDuration($endTime);
+                                    $endTime = clone $startTime;
+                                    $endTime = $endTime->add($duration);
+                                } else {
+                                    $endTime = DateTimeParser::parseDateTime($endTime);
+                                }
+
+                                if ($this->start && $this->start > $endTime) continue;
+                                if ($this->end && $this->end < $startTime) continue;
+                                $fbData->add(
+                                    $startTime->getTimeStamp(),
+                                    $endTime->getTimeStamp(),
+                                    $fbType
+                                );
+
+                            }
+
+
+                        }
+                        break;
+
+                }
+
+
+            }
+
+        }
+
+    }
+
+    /**
+     * This method takes a FreeBusyData object and generates the VCALENDAR
+     * object associated with it.
+     *
+     * @return VCalendar
+     */
+    protected function generateFreeBusyCalendar(FreeBusyData $fbData) {
+
+        if ($this->baseObject) {
+            $calendar = $this->baseObject;
+        } else {
+            $calendar = new VCalendar();
+        }
+
+        $vfreebusy = $calendar->createComponent('VFREEBUSY');
+        $calendar->add($vfreebusy);
+
+        if ($this->start) {
+            $dtstart = $calendar->createProperty('DTSTART');
+            $dtstart->setDateTime($this->start);
+            $vfreebusy->add($dtstart);
+        }
+        if ($this->end) {
+            $dtend = $calendar->createProperty('DTEND');
+            $dtend->setDateTime($this->end);
+            $vfreebusy->add($dtend);
+        }
+
+        $tz = new \DateTimeZone('UTC');
+        $dtstamp = $calendar->createProperty('DTSTAMP');
+        $dtstamp->setDateTime(new DateTimeImmutable('now', $tz));
+        $vfreebusy->add($dtstamp);
+
+        foreach ($fbData->getData() as $busyTime) {
+
+            $busyType = strtoupper($busyTime['type']);
+
+            // Ignoring all the FREE parts, because those are already assumed.
+            if ($busyType === 'FREE') {
+                continue;
+            }
+
+            $busyTime[0] = new \DateTimeImmutable('@' . $busyTime['start'], $tz);
+            $busyTime[1] = new \DateTimeImmutable('@' . $busyTime['end'], $tz);
+
+            $prop = $calendar->createProperty(
+                'FREEBUSY',
+                $busyTime[0]->format('Ymd\\THis\\Z') . '/' . $busyTime[1]->format('Ymd\\THis\\Z')
+            );
+
+            // Only setting FBTYPE if it's not BUSY, because BUSY is the
+            // default anyway.
+            if ($busyType !== 'BUSY') {
+                $prop['FBTYPE'] = $busyType;
+            }
+            $vfreebusy->add($prop);
+
+        }
+
+        return $calendar;
+
+
+    }
+
+}