Add fromJsonSchemaFile() and fromJsonSchema() method

.gitignore

@@ -1,3 +1,5 @@
 .idea
 composer.lock
-vendor
+vendor
+.php_cs.cache
+.phpunit.result.cache

.php_cs

@@ -0,0 +1,10 @@
+<?php
+
+$config = new Prooph\CS\Config\Prooph();
+$config->getFinder()->in(__DIR__);
+
+$cacheDir = getenv('TRAVIS') ? getenv('HOME') . '/.php-cs-fixer' : __DIR__;
+
+$config->setCacheFile($cacheDir . '/.php_cs.cache');
+
+return $config;

composer.json

@@ -17,18 +17,18 @@
     ],
     "require": {
         "php": "^7.4 || ^8.0",
+        "ext-json": "*",
         "event-engine/php-data": "^2.0",
         "event-engine/php-engine-utils": "^0.2",
         "event-engine/php-schema": "^0.2",
         "ramsey/uuid": "^3.6 || ^4.0"
     },
     "require-dev": {
-        "ext-json": "*",
         "justinrainbow/json-schema": "^5.2",
         "malukenho/docheader": "^0.1.4",
         "opis/json-schema": "^1.0",
         "phpunit/phpunit": "^8.0 || ^9.0",
-        "prooph/php-cs-fixer-config": "^0.4",
+        "prooph/php-cs-fixer-config": "^v0.4.0",
         "roave/security-advisories": "dev-master",
         "php-coveralls/php-coveralls": "^2.0"
     },

src/Exception/CouldNotReadFileException.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * This file is part of event-engine/php-json-schema.
+ * (c) 2018-2021 prooph software GmbH <[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 EventEngine\JsonSchema\Exception;
+
+final class CouldNotReadFileException extends RuntimeException
+{
+    public static function forFile(string $file): self
+    {
+        return new self(
+            \sprintf('Could not read "%s" file.', $file)
+        );
+    }
+}

src/Exception/RuntimeException.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * This file is part of event-engine/php-json-schema.
+ * (c) 2018-2021 prooph software GmbH <[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 EventEngine\JsonSchema\Exception;
+
+use RuntimeException as PhpRuntimeException;
+
+class RuntimeException extends PhpRuntimeException implements JsonSchemaException
+{
+}

src/JsonSchemaArray.php

@@ -1,4 +1,5 @@
 <?php
+
 /**
  * This file is part of event-engine/php-json-schema.
  * (c) 2018-2021 prooph software GmbH <[email protected]>
@@ -11,16 +12,31 @@
 
 namespace EventEngine\JsonSchema;
 
+use EventEngine\JsonSchema\Exception\CouldNotReadFileException;
 use EventEngine\Schema\InputTypeSchema;
 use EventEngine\Schema\PayloadSchema;
 use EventEngine\Schema\ResponseTypeSchema;
+use const JSON_THROW_ON_ERROR;
 
 final class JsonSchemaArray implements PayloadSchema, ResponseTypeSchema, InputTypeSchema
 {
-    /**
-     * @var array
-     */
-    private $schema;
+    private array $schema;
+
+    public static function fromFile(string $file, int $flags = JSON_THROW_ON_ERROR, int $depth = 512): self
+    {
+        if (! \file_exists($file) || ! \is_readable($file)) {
+            throw CouldNotReadFileException::forFile($file);
+        }
+
+        return self::fromString(\file_get_contents($file), $depth, $flags);
+    }
+
+    public static function fromString(string $jsonSchema, int $flags = JSON_THROW_ON_ERROR, int $depth = 512): self
+    {
+        return new self(
+            \json_decode($jsonSchema, true, $depth, $flags)
+        );
+    }
 
     public function __construct(array $schema)
     {

tests/JsonSchemaArrayTest.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * This file is part of event-engine/php-json-schema.
+ * (c) 2018-2021 prooph software GmbH <[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 EventEngineTest\JsonSchema;
+
+use EventEngine\JsonSchema\Exception\CouldNotReadFileException;
+use EventEngine\JsonSchema\JsonSchemaArray;
+
+final class JsonSchemaArrayTest extends BasicTestCase
+{
+    private const FILE = __DIR__ . DIRECTORY_SEPARATOR . '_files/schema.json';
+
+    /**
+     * @test
+     */
+    public function it_creates_json_schema_from_file(): void
+    {
+        $cut = JsonSchemaArray::fromFile(self::FILE);
+        $this->assertArrayHasKey('properties', $cut->toArray());
+    }
+
+    /**
+     * @test
+     */
+    public function it_creates_json_schema_from_string(): void
+    {
+        $cut = JsonSchemaArray::fromString(\file_get_contents(self::FILE));
+        $this->assertArrayHasKey('properties', $cut->toArray());
+    }
+
+    /**
+     * @test
+     */
+    public function it_throws_exception_if_file_is_not_found(): void
+    {
+        $this->expectException(CouldNotReadFileException::class);
+        JsonSchemaArray::fromFile('unknown.json');
+    }
+}

tests/_files/schema.json

@@ -0,0 +1,16 @@
+{
+    "type": "object",
+    "properties": {
+        "id": {
+            "type": "string"
+        },
+        "name": {
+            "type": "string"
+        }
+    },
+    "required": [
+        "id",
+        "name"
+    ],
+    "additionalProperties": false
+}