Add attribute rule

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 2.1.0 - 2025-08-05
+- Add `JsonSchemaAttributeRule`
+
 ## 2.0.0 - 2025-08-05
 - Modernize code
 - Drop support for laravel 10.x

README.md

@@ -14,7 +14,9 @@ composer require dutchcodingcompany/laravel-json-schema
 
 ## Usage
 1. Create a json schema in the schema directory, eg. `storage/app/schema/example.json`
-2. Reference the schema in the validator: `new \DutchCodingCompany\LaravelJsonSchema\Rules\JsonSchemaRule('example')`
+2. Reference the schema in the validator using one of the rules:
+   - `new \DutchCodingCompany\LaravelJsonSchema\Rules\JsonSchemaRule('example')`
+   - `new \DutchCodingCompany\LaravelJsonSchema\Rules\JsonSchemaAttributeRule('type', TypeEnum::class)` (be careful to validate the attribute `type` in this case)
 
 To customize the schema directory, use environment variable `JSON_SCHEMA_DIRECTORY` or publish the config file.
 

src/Contracts/JsonSchemaNameProvider.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace DutchCodingCompany\LaravelJsonSchema\Contracts;
+
+interface JsonSchemaNameProvider
+{
+    public function getSchemaName(): string;
+}

src/Rules/BaseRule.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace DutchCodingCompany\LaravelJsonSchema\Rules;
+
+use Closure;
+use DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaValidator;
+use Illuminate\Container\Container;
+use Illuminate\Contracts\Validation\ValidationRule;
+
+abstract class BaseRule implements ValidationRule
+{
+    protected JsonSchemaValidator $schemaValidator;
+
+    /**
+     * @param  bool  $detailedMessage  wether of not to include the details of what failed
+     * @param  \DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaValidator|null  $schemaValidator  custom repository, otherwise resolved from the service container
+     */
+    public function __construct(
+        protected bool $detailedMessage = true,
+        JsonSchemaValidator | null $schemaValidator = null,
+    ) {
+        $this->schemaValidator = $schemaValidator ?? Container::getInstance()->make(JsonSchemaValidator::class);
+    }
+
+    /**
+     * Run the validation rule.
+     */
+    public function validate(string $attribute, mixed $value, Closure $fail): void
+    {
+        $result = $this->schemaValidator->validate($this->determineSchemaName(), $value);
+
+        if ($result->failed()) {
+            $fail($this->detailedMessage
+                ? 'json-schema::messages.detailed-error-message'
+                : 'json-schema::messages.error-message'
+            )->translate([
+                'attribute' => $attribute,
+                'details' => $result->getMessage() ?? '',
+            ]);
+        }
+    }
+
+    abstract protected function determineSchemaName(): string;
+}

src/Rules/JsonSchemaAttributeRule.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace DutchCodingCompany\LaravelJsonSchema\Rules;
+
+use DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaNameProvider;
+use DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaValidator;
+use Illuminate\Contracts\Validation\DataAwareRule;
+use InvalidArgumentException;
+
+class JsonSchemaAttributeRule extends BaseRule implements DataAwareRule
+{
+    /**
+     * All of the data under validation.
+     *
+     * @var array<string, mixed>
+     */
+    protected $data = [];
+
+    /**
+     * @param  string  $attribute  from with other attribute to retrieve the schema name
+     * @param  class-string<\BackedEnum&\DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaNameProvider>|null  $enum  which enum to cast the schema name into (if applicable)
+     */
+    public function __construct(
+        protected string $attribute,
+        protected ?string $enum = null,
+        protected bool $detailedMessage = true,
+        JsonSchemaValidator | null $schemaValidator = null,
+    ) {
+        parent::__construct($detailedMessage, $schemaValidator);
+    }
+
+    /**
+     * Set the data under validation.
+     *
+     * @param  array<string, mixed>  $data
+     */
+    public function setData(array $data): static
+    {
+        $this->data = $data;
+
+        return $this;
+    }
+
+    protected function determineSchemaName(): string
+    {
+        $schemaName = data_get($this->data, $this->attribute);
+
+        if ($this->enum !== null) {
+            $enum = ($this->enum)::tryFrom($schemaName);
+
+            if ($enum instanceof JsonSchemaNameProvider) {
+                return $enum->getSchemaName();
+            }
+        }
+
+        if (is_string($schemaName)) {
+            return $schemaName;
+        }
+
+        throw new InvalidArgumentException('Cannot determine schema name from attribute "'.$this->attribute.'"');
+    }
+}

src/Rules/JsonSchemaRule.php

@@ -4,41 +4,22 @@
 
 use Closure;
 use DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaValidator;
-use Illuminate\Container\Container;
-use Illuminate\Contracts\Validation\ValidationRule;
 
-class JsonSchemaRule implements ValidationRule
+class JsonSchemaRule extends BaseRule
 {
-    protected JsonSchemaValidator $schemaValidator;
-
     /**
      * @param  string  $schema  name of the schema to validate
-     * @param  bool  $detailedMessage  wether of not to include the details of what failed
-     * @param  \DutchCodingCompany\LaravelJsonSchema\Contracts\JsonSchemaValidator|null  $schemaValidator  custom repository, otherwise resolved from the service container
      */
     public function __construct(
         protected string $schema,
         protected bool $detailedMessage = true,
         JsonSchemaValidator | null $schemaValidator = null,
     ) {
-        $this->schemaValidator = $schemaValidator ?? Container::getInstance()->make(JsonSchemaValidator::class);
+        parent::__construct($detailedMessage, $schemaValidator);
     }
 
-    /**
-     * Run the validation rule.
-     */
-    public function validate(string $attribute, mixed $value, Closure $fail): void
+    protected function determineSchemaName(): string
     {
-        $result = $this->schemaValidator->validate($this->schema, $value);
-
-        if ($result->failed()) {
-            $fail($this->detailedMessage
-                ? 'json-schema::messages.detailed-error-message'
-                : 'json-schema::messages.error-message'
-            )->translate([
-                'attribute' => $attribute,
-                'details' => $result->getMessage() ?? '',
-            ]);
-        }
+        return $this->schema;
     }
 }