From b794e64386801f3275b245c42203c5ace21d86b6 Mon Sep 17 00:00:00 2001
From: Awilum <sergey.romanenko@flextype.org>
Date: Tue, 30 Aug 2022 21:04:53 +0300
Subject: [PATCH] feat(expressions): add new `fetch` expression

---
 .../Entries/Expressions/FetchExpression.php   | 57 +++++++++++++++++++
 .../Expressions/FetchExpressionTest.php       | 41 +++++++++++++
 2 files changed, 98 insertions(+)
 create mode 100644 src/flextype/core/Entries/Expressions/FetchExpression.php
 create mode 100644 tests/src/flextype/core/Entries/Expressions/FetchExpressionTest.php

diff --git a/src/flextype/core/Entries/Expressions/FetchExpression.php b/src/flextype/core/Entries/Expressions/FetchExpression.php
new file mode 100644
index 00000000..576540b5
--- /dev/null
+++ b/src/flextype/core/Entries/Expressions/FetchExpression.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+ /**
+ * Flextype - Hybrid Content Management System with the freedom of a headless CMS
+ * and with the full functionality of a traditional CMS!
+ *
+ * Copyright (c) Sergey Romanenko (https://awilum.github.io)
+ *
+ * Licensed under The MIT License.
+ *
+ * For full copyright and license information, please see the LICENSE
+ * Redistributions of files must retain the above copyright notice.
+ */
+
+namespace Flextype\Entries\Expressions;
+
+use Glowy\Macroable\Macroable;
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+use function Flextype\fetch;
+use function Flextype\entries;
+
+class FetchExpression implements ExpressionFunctionProviderInterface
+{
+    public function getFunctions()
+    {
+        return [new ExpressionFunction('fetch', static fn (string $resource, array $options = []) => '(new \Flextype\Entries\Expressions\FetchExpressionsMethods())->fetch($resource, $options);', static fn ($arguments, string $resource, array $options = []) => (new \Flextype\Entries\Expressions\FetchExpressionsMethods())->fetch($resource, $options))];
+    }
+}
+
+class FetchExpressionsMethods
+{
+    use Macroable;
+
+    /**
+     * Fetch data from entries, local files and urls.
+     *
+     * @param string $resource A resource that you wish to fetch.
+     * @param array $options Options.
+     * @return Glowy\Arrays\Arrays|GuzzleHttp\Psr7\Response Returns the data from the resource or empty collection on failure.
+     */
+    function fetch(string $resource, array $options = [])
+    {
+        // Backup current entry data
+        $original = entries()->registry()->get('methods.fetch');
+
+        // Do fetch the data from the resource.
+        $result = fetch($resource, $options);
+
+        // Restore original entry data
+        entries()->registry()->set('methods.fetch', $original);
+                
+        return $result;
+    }
+}
\ No newline at end of file
diff --git a/tests/src/flextype/core/Entries/Expressions/FetchExpressionTest.php b/tests/src/flextype/core/Entries/Expressions/FetchExpressionTest.php
new file mode 100644
index 00000000..5f8dcd7a
--- /dev/null
+++ b/tests/src/flextype/core/Entries/Expressions/FetchExpressionTest.php
@@ -0,0 +1,41 @@
+<?php
+
+use Flextype\Component\Filesystem\Filesystem;
+use function Glowy\Filesystem\filesystem;
+use function Flextype\entries;
+
+beforeEach(function() {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->create();
+});
+
+afterEach(function (): void {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->delete();
+});
+
+test('fetch expression', function () {
+
+    // 1.
+    $this->assertTrue(entries()->create('data', ['title' => 'Foo!', 'category' => 'foo']));
+    $this->assertTrue(entries()->create('foo-test', ['test1' => "[[ fetch('data').get('title') ]]", 
+                                                 'test2' => "[[ fetch('data').toJson() ]]", 
+                                                 'test3' => "[[ fetch('data').get('foo', 'FooDefault') ]]"]));
+    
+    $foo = entries()->fetch('foo-test');
+
+    expect($foo['test1'])->toBe('Foo!');
+    expect($foo['test2'])->toBeJson();
+    expect($foo['test3'])->toBe('FooDefault');
+
+    // 2.
+    $this->assertTrue(entries()->create('bar-test', ['test1' => "[[ fetch(const('FLEXTYPE_ROOT_DIR') ~ '/src/flextype/flextype.yaml').get('name') ]]", 
+                                                     'test2' => "[[ fetch(const('FLEXTYPE_ROOT_DIR') ~ '/src/flextype/flextype.yaml').toJson() ]]", 
+                                                     'test3' => "[[ fetch(const('FLEXTYPE_ROOT_DIR') ~ '/src/flextype/flextype.yaml').get('boo', 'Boo') ]]"]));
+
+    $bar = entries()->fetch('bar-test');
+
+    expect($bar['test1'])->toBe('Flextype');
+    expect($bar['test2'])->toBeJson();
+    expect($bar['test3'])->toBe('Boo');
+
+    // 3. @TODO test for fetch data from the urls...
+});
\ No newline at end of file