feat: handle JSON_PRETTY_PRINT option with the JSON normalizer

Formats the JSON with whitespaces and line breaks. ```php $input = [ 'value' => 'foo', 'list' => [ 'foo', 42, ['sub'] ], 'associative' => [ 'value' => 'foo', 'sub' => [ 'string' => 'foo', 'integer' => 42, ], ], ]; (new \CuyZ\Valinor\MapperBuilder()) ->normalizer(\CuyZ\Valinor\Normalizer\Format::json()) ->withOptions(\JSON_PRETTY_PRINT) ->normalize($input); // Result: // { // "value": "foo", // "list": [ // "foo", // 42, // [ // "sub" // ] // ], // "associative": { // "value": "foo", // "sub": { // "string": "foo", // "integer": 42 // } // } // }
CuyZ · Oct 27, 2024 · f1fb93a · f1fb93a
1 parent 6e68d6f
commit f1fb93a
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Showing 4 changed files with 86 additions and 11 deletions.
diff --git a/docs/pages/serialization/normalizing-json.md b/docs/pages/serialization/normalizing-json.md
@@ -109,6 +109,7 @@ representations ([see official doc for more information]):
 - `JSON_INVALID_UTF8_IGNORE`
 - `JSON_INVALID_UTF8_SUBSTITUTE`
 - `JSON_NUMERIC_CHECK`
+- `JSON_PRETTY_PRINT`
 - `JSON_PRESERVE_ZERO_FRACTION`
 - `JSON_UNESCAPED_LINE_TERMINATORS`
 - `JSON_UNESCAPED_SLASHES`

diff --git a/src/Normalizer/Formatter/JsonFormatter.php b/src/Normalizer/Formatter/JsonFormatter.php
@@ -18,7 +18,6 @@
 use function json_encode;
 
 use const JSON_FORCE_OBJECT;
-use const JSON_THROW_ON_ERROR;
 
 /** @internal */
 final class JsonFormatter implements StreamFormatter
@@ -32,6 +31,11 @@ public function __construct(
     ) {}
 
     public function format(mixed $value): void
+    {
+        $this->formatRecursively($value, 1);
+    }
+
+    private function formatRecursively(mixed $value, int $depth): void
     {
         if (is_null($value)) {
             $this->write('null');
@@ -66,22 +70,42 @@ public function format(mixed $value): void
             $this->write($isList ? '[' : '{');
 
             foreach ($value as $key => $val) {
+                $chunk = '';
+
                 if (! $isFirst) {
-                    $this->write(',');
+                    $chunk = ',';
+                }
+
+                if ($this->jsonEncodingOptions & JSON_PRETTY_PRINT) {
+                    $chunk .= PHP_EOL . str_repeat('    ', $depth);
                 }
 
                 $isFirst = false;
 
                 if (! $isList) {
                     $key = json_encode((string)$key, $this->jsonEncodingOptions);
 
-                    $this->write($key . ':');
+                    $chunk .= $key . ':';
+
+                    if ($this->jsonEncodingOptions & JSON_PRETTY_PRINT) {
+                        $chunk .= ' ';
+                    }
                 }
 
-                $this->format($val);
+                $this->write($chunk);
+
+                $this->formatRecursively($val, $depth + 1);
+            }
+
+            $chunk = '';
+
+            if ($this->jsonEncodingOptions & JSON_PRETTY_PRINT) {
+                $chunk = PHP_EOL . str_repeat('    ', $depth - 1);
             }
 
-            $this->write($isList ? ']' : '}');
+            $chunk .= $isList ? ']' : '}';
+
+            $this->write($chunk);
         } else {
             throw new CannotFormatInvalidTypeToJson($value);
         }

diff --git a/src/Normalizer/JsonNormalizer.php b/src/Normalizer/JsonNormalizer.php
@@ -43,6 +43,7 @@ final class JsonNormalizer implements Normalizer
     | JSON_INVALID_UTF8_IGNORE
     | JSON_INVALID_UTF8_SUBSTITUTE
     | JSON_NUMERIC_CHECK
+    | JSON_PRETTY_PRINT
     | JSON_PRESERVE_ZERO_FRACTION
     | JSON_UNESCAPED_LINE_TERMINATORS
     | JSON_UNESCAPED_SLASHES

diff --git a/tests/Integration/Normalizer/NormalizerTest.php b/tests/Integration/Normalizer/NormalizerTest.php
@@ -747,6 +747,61 @@ public function getIterator(): Traversable
             'expected array' => [],
             'expected_json' => '{}',
         ];
+
+        yield 'nested array with JSON_PRETTY_PRINT option' => [
+            'input' => [
+                'value' => 'foo',
+                'list' => [
+                    'foo',
+                    42,
+                    ['sub']
+                ],
+                'associative' => [
+                    'value' => 'foo',
+                    'sub' => [
+                        'string' => 'foo',
+                        'integer' => 42,
+                    ],
+                ],
+            ],
+            'expected array' => [
+                'value' => 'foo',
+                'list' => [
+                    'foo',
+                    42,
+                    ['sub']
+                ],
+                'associative' => [
+                    'value' => 'foo',
+                    'sub' => [
+                        'string' => 'foo',
+                        'integer' => 42,
+                    ],
+                ],
+            ],
+            'expected_json' => <<<JSON
+            {
+                "value": "foo",
+                "list": [
+                    "foo",
+                    42,
+                    [
+                        "sub"
+                    ]
+                ],
+                "associative": {
+                    "value": "foo",
+                    "sub": {
+                        "string": "foo",
+                        "integer": 42
+                    }
+                }
+            }
+            JSON,
+            'transformers' => [],
+            'transformerAttributes' => [],
+            'jsonEncodingOptions' => JSON_PRETTY_PRINT,
+        ];
     }
 
     public function test_generator_of_scalar_yields_expected_array(): void
@@ -1176,12 +1231,6 @@ public function test_json_transformer_only_accepts_acceptable_json_options(): vo
     {
         $normalizer = $this->mapperBuilder()->normalizer(Format::json())->withOptions(JSON_PARTIAL_OUTPUT_ON_ERROR);
         self::assertSame(JSON_THROW_ON_ERROR, (fn () => $this->jsonEncodingOptions)->call($normalizer));
-
-        $normalizer = $this->mapperBuilder()->normalizer(Format::json())->withOptions(JSON_PRETTY_PRINT);
-        self::assertSame(JSON_THROW_ON_ERROR, (fn () => $this->jsonEncodingOptions)->call($normalizer));
-
-        $normalizer = $this->mapperBuilder()->normalizer(Format::json())->withOptions(JSON_PARTIAL_OUTPUT_ON_ERROR | JSON_PRETTY_PRINT);
-        self::assertSame(JSON_THROW_ON_ERROR, (fn () => $this->jsonEncodingOptions)->call($normalizer));
     }
 }