[FEATURE] Recurrence rule generation

examples/example4.php

@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * This file is part of the eluceo/iCal package.
+ *
+ * (c) 2023 Markus Poerschke <markus@poerschke.nrw>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Example;
+
+use DateTimeImmutable;
+use Eluceo\iCal\Domain\Entity\Calendar;
+use Eluceo\iCal\Domain\Entity\Event;
+use Eluceo\iCal\Domain\Entity\RecurrenceRule;
+use Eluceo\iCal\Domain\Enum\RecurrenceFrequency;
+use Eluceo\iCal\Domain\Enum\RecurrenceWeekDay;
+use Eluceo\iCal\Domain\ValueObject\DateTime;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\By;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\By\Day;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\By\SetPosition;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Count;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Exclusion;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Frequency;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Until;
+use Eluceo\iCal\Domain\ValueObject\TimeSpan;
+use Eluceo\iCal\Presentation\Factory\CalendarFactory;
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+// 1. Create the recurrence rule.
+$rrule = new RecurrenceRule();
+$rrule
+    ->setFrequency(new Frequency(RecurrenceFrequency::monthly()))
+    ->setCount(new Count(3))
+    ->setBy(new By([
+        new Day([
+            RecurrenceWeekDay::tuesday(),
+            RecurrenceWeekDay::wednesday(),
+            RecurrenceWeekDay::thursday()
+        ]),
+        new SetPosition([3])
+    ]))
+    ->setExclusions(new Exclusion([
+        new DateTime(new DateTimeImmutable('now'),true),
+        new DateTime(new DateTimeImmutable('2023-10-23T10:00:00'),true),
+    ]))
+    ->setUntil(new Until(new DateTime(new DateTimeImmutable('2023-12-31T10:00:00'),true)));
+
+// 2. Create Event domain entity.
+$event = new Event();
+$event
+    ->setSummary('Stand-up meeting')
+    ->setOccurrence(
+        new TimeSpan(
+            new DateTime(DateTimeImmutable::createFromFormat('Y-m-d H:i:s', '2023-10-15 10:00:00'), true),
+            new DateTime(DateTimeImmutable::createFromFormat('Y-m-d H:i:s', '2023-10-15 10:30:00'), true)
+        )
+    )
+    ->setRecurrenceRule($rrule)
+;
+
+// 3. Create Calendar domain entity.
+$calendar = new Calendar([$event]);
+
+// 4. Transform domain entity into an iCalendar component
+$componentFactory = new CalendarFactory();
+$calendarComponent = $componentFactory->createCalendar($calendar);
+
+// 5. Set HTTP headers.
+header('Content-Type: text/calendar; charset=utf-8');
+header('Content-Disposition: attachment; filename="cal.ics"');
+
+// 6. Output.
+echo $calendarComponent;

src/Domain/Entity/Event.php

@@ -34,6 +34,7 @@ class Event
     private ?Organizer $organizer = null;
     private ?Timestamp $lastModified = null;
     private ?EventStatus $status = null;
+    private ?RecurrenceRule $rrule = null;
 
     /**
      * @var array<Attendee>
@@ -347,4 +348,30 @@ public function unsetStatus(): self
 
         return $this;
     }
+
+    public function getRecurrenceRule(): RecurrenceRule
+    {
+        assert($this->rrule !== null);
+
+        return $this->rrule;
+    }
+
+    public function hasRecurrenceRule(): bool
+    {
+        return $this->rrule !== null;
+    }
+
+    public function setRecurrenceRule(RecurrenceRule $rrule): self
+    {
+        $this->rrule = $rrule;
+
+        return $this;
+    }
+
+    public function unsetRecurrenceRule(): self
+    {
+        $this->rrule = null;
+
+        return $this;
+    }
 }

src/Domain/Entity/RecurrenceRule.php

@@ -0,0 +1,217 @@
+<?php
+
+/*
+ * This file is part of the eluceo/iCal package.
+ *
+ * (c) 2023 Markus Poerschke <markus@poerschke.nrw>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Eluceo\iCal\Domain\Entity;
+
+use Eluceo\iCal\Domain\ValueObject\DateTime;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\By;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Count;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Exclusion;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Frequency;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Interval;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\Until;
+use Eluceo\iCal\Domain\ValueObject\Recurrence\WeekStart;
+use Eluceo\iCal\Presentation\Component\Property\Value\DateTimeValue;
+
+class RecurrenceRule
+{
+    private ?Until $until = null;
+    private ?Frequency $frequency = null;
+    private ?Count $count = null;
+    private ?Interval $interval = null;
+    private ?WeekStart $weekStart = null;
+    private ?By $by = null;
+    private ?Exclusion $exclusions = null;
+
+    public function getUntil(): ?Until
+    {
+        return $this->until;
+    }
+
+    public function hasUntil(): bool
+    {
+        return $this->until !== null;
+    }
+
+    public function setUntil(?Until $until): self
+    {
+        $this->until = $until;
+        return $this;
+    }
+
+    public function unsetUntil(): self
+    {
+        $this->until = null;
+        return $this;
+    }
+
+    public function getFrequency(): ?Frequency
+    {
+        return $this->frequency;
+    }
+
+    public function hasFrequency(): bool
+    {
+        return $this->frequency !== null;
+    }
+
+    public function setFrequency(?Frequency $frequency): self
+    {
+        $this->frequency = $frequency;
+        return $this;
+    }
+
+    public function unsetFrequency(): self
+    {
+        $this->frequency = null;
+        return $this;
+    }
+
+    public function getCount(): ?Count
+    {
+        return $this->count;
+    }
+
+    public function hasCount(): bool
+    {
+        return $this->count !== null;
+    }
+
+    public function setCount(?Count $count): self
+    {
+        $this->count = $count;
+        return $this;
+    }
+
+    public function unsetCount(): self
+    {
+        $this->count = null;
+        return $this;
+    }
+
+    public function getInterval(): ?Interval
+    {
+        return $this->interval;
+    }
+
+    public function hasInterval(): bool
+    {
+        return $this->interval !== null;
+    }
+
+    public function setInterval(?Interval $interval): self
+    {
+        $this->interval = $interval;
+        return $this;
+    }
+
+    public function unsetInterval(): self
+    {
+        $this->interval = null;
+        return $this;
+    }
+
+    public function getWeekStart(): ?WeekStart
+    {
+        return $this->weekStart;
+    }
+
+    public function hasWeekStart(): bool
+    {
+        return $this->weekStart !== null;
+    }
+
+    public function setWeekStart(?WeekStart $weekStart): self
+    {
+        $this->weekStart = $weekStart;
+        return $this;
+    }
+
+    public function unsetWeekStart(): self
+    {
+        $this->weekStart = null;
+        return $this;
+    }
+
+    public function getBy(): ?By
+    {
+        return $this->by;
+    }
+
+    public function hasBy(): bool
+    {
+        return !empty($this->by);
+    }
+
+    public function setBy(By $by): self
+    {
+        $this->by = $by;
+        return $this;
+    }
+
+    public function unsetBy(): self
+    {
+        $this->by = null;
+        return $this;
+    }
+
+    public function getExclusions(): ?Exclusion
+    {
+        return $this->exclusions;
+    }
+
+    public function hasExclusions(): bool
+    {
+        return !empty($this->exclusions);
+    }
+
+    public function setExclusions(Exclusion $exclusions): self
+    {
+        $this->exclusions = $exclusions;
+        return $this;
+    }
+
+    public function unsetExclusions(): self
+    {
+        $this->exclusions = null;
+        return $this;
+    }
+
+    public function __toString(): string
+    {
+        if (
+            !$this->hasUntil()
+            && !$this->hasFrequency()
+            && !$this->hasCount()
+            && !$this->hasInterval()
+            && !$this->hasInterval()
+            && !$this->hasWeekStart()
+            && !$this->hasBy()
+        ) {
+            return '';
+        }
+
+        $parts = [
+            $this->getUntil(),
+            $this->getFrequency(),
+            $this->getCount(),
+            $this->getInterval(),
+            $this->getWeekStart(),
+            $this->getBy()
+        ];
+
+        return implode(';', array_map('strval',
+            array_filter($parts, static function ($part) {
+                return !empty($part);
+            })
+        ));
+    }
+}

src/Domain/Enum/RecurrenceEnum.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of the eluceo/iCal package.
+ *
+ * (c) 2023 Markus Poerschke <markus@poerschke.nrw>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Eluceo\iCal\Domain\Enum;
+
+use InvalidArgumentException;
+use ReflectionClass;
+
+abstract class RecurrenceEnum
+{
+    protected string $value;
+
+    public function __construct(string $value)
+    {
+        $constants = (new ReflectionClass(static::class))->getConstants();
+        if (!in_array($value, $constants, true)) {
+            $allowedValues = implode(', ', $constants);
+            throw new InvalidArgumentException(
+                "Value must be one of: {$allowedValues}"
+            );
+        }
+        $this->value = $value;
+    }
+
+    public function __toString(): string
+    {
+        return strtoupper($this->value);
+    }
+}