initial scheduler implementation

src/Application/Command/ScheduleCommand.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Application\Command;
+
+use Streak\Application\Command;
+
+/**
+ * @author Alan Gabriel Bem <[email protected]>
+ */
+class ScheduleCommand implements Command
+{
+    private $command;
+
+    private $when;
+
+    public function __construct(Command $command, \DateTimeInterface $when)
+    {
+        $this->command = $command;
+        $this->when = $when;
+    }
+
+    public function command() : Command
+    {
+        return $this->command;
+    }
+
+    public function when() : \DateTimeInterface
+    {
+        return $this->when;
+    }
+}

src/Application/Command/ScheduleCommandHandler.php

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+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Application\Command;
+
+use Streak\Application\Command;
+use Streak\Application\CommandHandler;
+use Streak\Application\Exception;
+
+/**
+ * @author Alan Gabriel Bem <[email protected]>
+ */
+class ScheduleCommandHandler implements CommandHandler
+{
+    private $commands;
+
+    public function __construct(ScheduledCommand\Repository $commands)
+    {
+        $this->commands = $commands;
+    }
+
+    public function handle(Command $command) : void
+    {
+        if (!$command instanceof ScheduleCommand) {
+            throw new Exception\CommandNotSupported($command);
+        }
+
+        $this->commands->add($command);
+    }
+}

src/Application/Command/ScheduledCommand/Repository.php

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+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Application\Command\ScheduledCommand;
+
+use Streak\Application\Command\ScheduleCommand;
+
+/**
+ * @author Alan Gabriel Bem <[email protected]>
+ */
+interface Repository
+{
+    public function add(ScheduleCommand $command) : void;
+}

tests/Application/Command/ScheduleCommandHandlerTest.php

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+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Application\Command;
+
+use PHPUnit\Framework\TestCase;
+use Streak\Application\Command;
+use Streak\Application\Exception;
+
+/**
+ * @author Alan Gabriel Bem <[email protected]>
+ *
+ * @covers \Streak\Application\Command\ScheduleCommandHandler
+ */
+class ScheduleCommandHandlerTest extends TestCase
+{
+    /**
+     * @var ScheduledCommand\Repository|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $repository;
+
+    /**
+     * @var Command|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $command;
+
+    protected function setUp()
+    {
+        $this->repository = $this->getMockBuilder(ScheduledCommand\Repository::class)->getMockForAbstractClass();
+        $this->command = $this->getMockBuilder(Command::class)->getMockForAbstractClass();
+    }
+
+    public function testSuccess()
+    {
+        $command = new ScheduleCommand($this->command, new \DateTime());
+
+        $this->repository
+            ->expects($this->once())
+            ->method('add')
+            ->with($command);
+
+        $handler = new ScheduleCommandHandler($this->repository);
+        $handler->handle($command);
+    }
+
+    public function testFailure()
+    {
+        $handler = new ScheduleCommandHandler($this->repository);
+
+        $exception = new Exception\CommandNotSupported($this->command);
+        $this->expectExceptionObject($exception);
+
+        $handler->handle($this->command);
+    }
+}

tests/Application/Command/ScheduleCommandTest.php

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+<?php
+
+/**
+ * This file is part of the streak package.
+ *
+ * (C) Alan Gabriel Bem <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Streak\Application\Command;
+
+use PHPUnit\Framework\TestCase;
+use Streak\Application\Command;
+
+/**
+ * @author Alan Gabriel Bem <[email protected]>
+ *
+ * @covers \Streak\Application\Command\ScheduleCommand
+ */
+class ScheduleCommandTest extends TestCase
+{
+    /**
+     * @var Command|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $command;
+
+    protected function setUp()
+    {
+        $this->command = $this->getMockBuilder(Command::class)->getMockForAbstractClass();
+    }
+
+    public function testCommand()
+    {
+        $now = new \DateTime();
+        $scheduled = new ScheduleCommand($this->command, $now);
+
+        $this->assertSame($this->command, $scheduled->command());
+        $this->assertSame($now, $scheduled->when());
+    }
+}