From 4e551b1347dd00370f00b7b110513d9331b1a296 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.uk>
Date: Wed, 13 Feb 2019 22:47:34 +0000
Subject: [PATCH] Group hosts for multiple events

---
 src/Service/Picker.php       | 51 ++++++++++++++++++++++++++++++++++++
 tests/Service/PickerTest.php | 39 +++++++++++++++++++++++++++
 2 files changed, 90 insertions(+)
 create mode 100644 src/Service/Picker.php
 create mode 100644 tests/Service/PickerTest.php

diff --git a/src/Service/Picker.php b/src/Service/Picker.php
new file mode 100644
index 0000000..c14d037
--- /dev/null
+++ b/src/Service/Picker.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Service;
+
+use Tightenco\Collect\Support\Collection;
+
+class Picker
+{
+    /**
+     * The combined hosts for the retrieved events.
+     *
+     * @var \Tightenco\Collect\Support\Collection
+     */
+    private $hosts;
+
+    /**
+     * Picker constructor.
+     */
+    public function __construct()
+    {
+        $this->hosts = collect();
+    }
+
+    /**
+     * Retrieve the event hosts.
+     *
+     * @return \Tightenco\Collect\Support\Collection
+     */
+    public function getHosts(): Collection
+    {
+        return $this->hosts;
+    }
+
+    /**
+     * Set the hosts for the retrieved events.
+     *
+     * @param \Tightenco\Collect\Support\Collection $data
+     *   The event data.
+     *
+     * @return self
+     */
+    public function setHosts(Collection $data): self
+    {
+        $this->hosts = $data->pluck('hosts.*.host_name')
+            ->flatten(1)
+            ->unique()
+            ->sort();
+
+        return $this;
+    }
+}
diff --git a/tests/Service/PickerTest.php b/tests/Service/PickerTest.php
new file mode 100644
index 0000000..43c13a7
--- /dev/null
+++ b/tests/Service/PickerTest.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Tests\Service;
+
+use App\Service\Picker;
+use PHPUnit\Framework\TestCase;
+use Tightenco\Collect\Support\Collection;
+
+class PickerTest extends TestCase
+{
+    /** @test */
+    public function hosts_for_multiple_events_are_grouped_and_unique()
+    {
+        $data = [
+            [
+                'hosts' => [
+                    ['host_name' => 'Lee Stone'],
+                    ['host_name' => 'Dave Liddament'],
+                    ['host_name' => 'Kat Zien'],
+                ],
+            ],
+            [
+                'hosts' => [
+                    ['host_name' => 'Oliver Davies'],
+                    ['host_name' => 'Lee Stone'],
+                    ['host_name' => 'Lucia Velasco'],
+                    ['host_name' => 'Dave Liddament'],
+                ],
+            ],
+        ];
+
+        $picker = new Picker();
+        $picker->setHosts(collect($data));
+
+        $hosts = $picker->getHosts();
+        $this->assertInstanceOf(Collection::class, $hosts);
+        $this->assertCount(5, $hosts);
+    }
+}