From c65980879a990e6d02a8ab262b014e670f314477 Mon Sep 17 00:00:00 2001
From: Harald Eilertsen <haraldei@anduin.net>
Date: Mon, 24 May 2021 18:04:18 +0200
Subject: Add function to generate selection boxes.

---
 giglogadmin.php                        |  1 +
 includes/view-helpers/select_field.php | 26 +++++++++++++++++
 tests/SelectFieldTest.php              | 53 ++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+)
 create mode 100644 includes/view-helpers/select_field.php
 create mode 100644 tests/SelectFieldTest.php

diff --git a/giglogadmin.php b/giglogadmin.php
index c8ae9b0..c35c470 100644
--- a/giglogadmin.php
+++ b/giglogadmin.php
@@ -33,6 +33,7 @@ if ( !class_exists( 'GiglogAdmin_Plugin' ) ) {
     require_once __DIR__ . '/includes/admin/helpfiles/instrunctions.php';
     require_once __DIR__ . '/includes/admin/helpfiles/instr_reviewers.php';
     require_once __DIR__ . '/includes/admin/helpfiles/instr_photog.php';
+    require_once __DIR__ . '/includes/view-helpers/select_field.php';
 
     class GiglogAdmin_Plugin
     {
diff --git a/includes/view-helpers/select_field.php b/includes/view-helpers/select_field.php
new file mode 100644
index 0000000..7cff3ef
--- /dev/null
+++ b/includes/view-helpers/select_field.php
@@ -0,0 +1,26 @@
+<?php
+// SPDX-FileCopyrightText: 2021 Andrea Chirulescu <andrea.chirulescu@gmail.com>
+// SPDX-FileCopyrightText: 2021 Harald Eilertsen <haraldei@anduin.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+namespace EternalTerror\ViewHelpers;
+
+/**
+ * Return HTML code for a selction box with the given options and preselected value.
+ *
+ * @param string    $name     The name attribute for the selection box
+ * @param array     $opts     The options as arrays of [value, label] pairs
+ * @param mixed|int $selected The value of the preselected option, or null if no
+ *                            option is preselected.
+ * @return string
+ */
+function select_field(string $name, ?array $opts = [], $selected = null) : string
+{
+    $body = '';
+    foreach ($opts as $opt) {
+        $sel = selected($selected, $opt[0], false);
+        $body .= "<option value=\"{$opt[0]}\"{$sel}>{$opt[1]}</option>";
+    }
+    return "<select name=\"{$name}\">{$body}</select>";
+}
diff --git a/tests/SelectFieldTest.php b/tests/SelectFieldTest.php
new file mode 100644
index 0000000..1c1a8c2
--- /dev/null
+++ b/tests/SelectFieldTest.php
@@ -0,0 +1,53 @@
+<?php
+// SPDX-FileCopyrightText: 2021 Andrea Chirulescu <andrea.chirulescu@gmail.com>
+// SPDX-FileCopyrightText: 2021 Harald Eilertsen <haraldei@anduin.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+declare(strict_types=1);
+
+use \EternalTerror\ViewHelpers;
+
+final class SelectFieldTest extends WP_UnitTestCase
+{
+    public function testEmptySelectField()
+    {
+        $res = ViewHelpers\select_field("fooselect");
+        $this->assertStringStartsWith('<select name="fooselect">', $res);
+        $this->assertStringEndsWith('</select>', $res);
+    }
+
+    public function testSelectFieldWithOneOption()
+    {
+        $res = ViewHelpers\select_field("fooselect", [[42, 'An option']]);
+        $this->assertStringStartsWith('<select name="fooselect">', $res);
+        $this->assertStringEndsWith('</select>', $res);
+        $this->assertStringContainsString('<option value="42">An option</option>', $res);
+    }
+
+    public function testSelectFieldWithMultipleOption()
+    {
+        $opts = [[42, 'An option'], [666, 'Another option'], ["foo", 'A foo option']];
+
+        $res = ViewHelpers\select_field("fooselect", $opts);
+
+        $this->assertStringStartsWith('<select name="fooselect">', $res);
+        $this->assertStringEndsWith('</select>', $res);
+        $this->assertStringContainsString('<option value="42">An option</option>', $res);
+        $this->assertStringContainsString('<option value="666">Another option</option>', $res);
+        $this->assertStringContainsString('<option value="foo">A foo option</option>', $res);
+    }
+
+    public function testSelectFieldWithSelectedOption()
+    {
+        $opts = [[42, 'An option'], [666, 'Another option'], ["foo", 'A foo option']];
+
+        $res = ViewHelpers\select_field("fooselect", $opts, 666);
+
+        $this->assertStringStartsWith('<select name="fooselect">', $res);
+        $this->assertStringEndsWith('</select>', $res);
+        $this->assertStringContainsString('<option value="42">An option</option>', $res);
+        $this->assertStringContainsString('<option value="666" selected=\'selected\'>Another option</option>', $res);
+        $this->assertStringContainsString('<option value="foo">A foo option</option>', $res);
+    }
+}
-- 
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