[Feature] Serialize resources using schemas (#2)

Makes `JsonApiResource` non-abstract, by injecting the schema.
This means writing a resource class for a specific resource type is now optional.

Author: lindyhopchris

CHANGELOG.md

@@ -3,6 +3,54 @@
 All notable changes to this project will be documented in this file. This project adheres to
 [Semantic Versioning](http://semver.org/) and [this changelog format](http://keepachangelog.com/).
 
+## Unreleased
+
+### Added
+- [#2](https://github.com/laravel-json-api/core/pull/2)
+**BREAKING** The `Core\Resources\JsonApiResource` is no longer abstract, and now expects the
+schema *and* the model to be injected via its constructor. It will use the schema to convert a
+model to a JSON:API resource. This allows the resource classes to be optional, as the resource
+resolution logic can now fall-back to the `JsonApiResource` when no specific resource class
+exists. Schema fields must implement the `Contracts\Resources\Serializer\Attribute`
+and `Contracts\Resources\Serializer\Relation` interfaces on their fields for the serialization
+to work.
+- **BREAKING** The `Contracts\Encoder\Encoder` contract now has a `withRequest` method to inject the
+current HTTP request into the encoding process. The response classes have been updated to pass
+the request through to the encoder in their `toResponse()` methods.
+- **BREAKING** The `Contracts\Schema\Container` contract now has a `schemaForModel` method to
+lookup a schema by providing either a model instance, or the fully-qualified class name of a model.
+- **BREAKING** The `Contracts\Schema\ID` contract now has a `key()` method, that can return
+the model key for the ID.
+- **BREAKING** The `Contracts\Schema\Schema` contract now has a `idKeyName()` method
+- New `Contracts\Resources\JsonApiRelation` contract for the relation object returned by the
+`JsonApiResource::relationships()` method. This has the methods on it that encoders can rely on when
+encoding the relationship to JSON.
+- New `Core\Resources\ConditionalIterator` class for iterating over values that could contain
+conditional attributes.
+
+### Changed
+- **BREAKING** The `attributes`, `relationships`, `meta` and `links` method of the `JsonApiResource`
+class now require the request to be passed as a parameter. This is to bring the resource in line
+with Laravel's Eloquent resource, though our implementation allows the request to be `null` to
+cater for resource encoding outside of HTTP requests (e.g. queued broadcasting). Additionally,
+the `relationship` method return type has been changed to the new `Contracts\Resources\JsonApiResource`
+contract.
+- **BREAKING** The `exists` and `create` methods on the `Contracts\Resources\Container` contract now
+correctly type-hint the parameter as an `object`.
+- **BREAKING** The `createResource` method on the `Contracts\Resources\Factory` contract now correctly
+type-hints the parameter as an `object`.
+- **BREAKING** The constructor of the `Core\Resources\Factory` class now expects a schema container
+and an optional array of resource bindings (instead of an iterable). If a `null` value is provided
+for the bindings, the bindings will be retrieved from the schema container. Additionally, the protected
+`build` method signature has been updated to correctly type-hint the second argument as an `object`.
+- **BREAKING** The constructor arguments for the `Core\Resources\Relation` class have been changed
+so that it now receives the model and base URI - rather than the `JsonApiResource` object. This
+change was made so that it can be used more broadly.
+
+### Removed
+- **BREAKING** The `attach` and `attachAll` methods of the `Core\Resources\Factory` class have been
+removed, because they were not in use.
+
 ## [1.0.0-alpha.1] - 2021-01-25
 
 Initial release.

src/Contracts/Encoder/Encoder.php

@@ -17,10 +17,18 @@
 
 namespace LaravelJsonApi\Contracts\Encoder;
 
+use Illuminate\Http\Request;
 use LaravelJsonApi\Core\Resources\JsonApiResource;
 
 interface Encoder
 {
+
+    /**
+     * @param Request|null $request
+     * @return $this
+     */
+    public function withRequest($request): self;
+
     /**
      * @param $includePaths
      * @return $this

src/Contracts/Resources/Container.php

@@ -29,32 +29,32 @@ interface Container
      * Resolve the value to a resource object or a cursor of resource objects.
      *
      * @param mixed $value
-     *      a resource object, record or an iterable of records.
+     *      a resource object, model or an iterable of models.
      * @return JsonApiResource|Generator
      */
     public function resolve($value);
 
     /**
-     * Can the provided record be converted to a resource object?
+     * Can the provided model be converted to a resource object?
      *
-     * @param mixed $record
+     * @param object $model
      * @return bool
      */
-    public function exists($record): bool;
+    public function exists(object $model): bool;
 
     /**
-     * Create a resource object for the supplied record.
+     * Create a resource object for the supplied models.
      *
-     * @param mixed $record
+     * @param object $model
      * @return JsonApiResource
      */
-    public function create($record): JsonApiResource;
+    public function create(object $model): JsonApiResource;
 
     /**
-     * Create resource objects for the supplied records.
+     * Create resource objects for the supplied models.
      *
-     * @param iterable $records
+     * @param iterable $models
      * @return Generator
      */
-    public function cursor(iterable $records): Generator;
+    public function cursor(iterable $models): Generator;
 }

src/Contracts/Resources/Factory.php

@@ -32,10 +32,10 @@ interface Factory
     public function handles(): iterable;
 
     /**
-     * Create a resource object for the supplied record.
+     * Create a resource object for the supplied model.
      *
-     * @param mixed $record
+     * @param object $model
      * @return JsonApiResource
      */
-    public function createResource($record): JsonApiResource;
+    public function createResource(object $model): JsonApiResource;
 }

src/Contracts/Resources/JsonApiRelation.php

@@ -0,0 +1,66 @@
+<?php
+/*
+ * Copyright 2021 Cloud Creativity Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types=1);
+
+namespace LaravelJsonApi\Contracts\Resources;
+
+use LaravelJsonApi\Core\Document\Links;
+
+interface JsonApiRelation
+{
+
+    /**
+     * Get the relation's JSON:API field name.
+     *
+     * @return string
+     */
+    public function fieldName(): string;
+
+    /**
+     * Get the value of the links member.
+     *
+     * @return Links
+     */
+    public function links(): Links;
+
+    /**
+     * Get the value of the meta member.
+     *
+     * @return array|null
+     */
+    public function meta(): ?array;
+
+    /**
+     * Get the value of the data member.
+     *
+     * @return mixed
+     */
+    public function data();
+
+    /**
+     * Should data always be shown?
+     *
+     * If this method returns `false`, the relationship's data will only be shown
+     * if the client has requested it (via include paths). Returning `true` means
+     * the relationship data will always be shown, regardless of what the client
+     * has requested.
+     *
+     * @return bool
+     */
+    public function showData(): bool;
+}

src/Contracts/Resources/Serializer/Attribute.php

@@ -0,0 +1,39 @@
+<?php
+/*
+ * Copyright 2021 Cloud Creativity Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types=1);
+
+namespace LaravelJsonApi\Contracts\Resources\Serializer;
+
+interface Attribute extends Hideable
+{
+
+    /**
+     * Get the JSON:API field name for the serialized attribute.
+     *
+     * @return string
+     */
+    public function serializedFieldName(): string;
+
+    /**
+     * Get the JSON value from the provided model.
+     *
+     * @param object $model
+     * @return mixed
+     */
+    public function serialize(object $model);
+}

src/Contracts/Resources/Serializer/Hideable.php

@@ -0,0 +1,42 @@
+<?php
+/*
+ * Copyright 2021 Cloud Creativity Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types=1);
+
+namespace LaravelJsonApi\Contracts\Resources\Serializer;
+
+use Illuminate\Http\Request;
+
+interface Hideable
+{
+
+    /**
+     * Is the field hidden?
+     *
+     * @param Request|null $request
+     * @return bool
+     */
+    public function isHidden($request): bool;
+
+    /**
+     * Is the field not hidden?
+     *
+     * @param Request|null $request
+     * @return bool
+     */
+    public function isNotHidden($request): bool;
+}

src/Contracts/Resources/Serializer/Relation.php

@@ -0,0 +1,42 @@
+<?php
+/*
+ * Copyright 2021 Cloud Creativity Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types=1);
+
+namespace LaravelJsonApi\Contracts\Resources\Serializer;
+
+use LaravelJsonApi\Contracts\Resources\JsonApiRelation;
+
+interface Relation extends Hideable
+{
+
+    /**
+     * Get the JSON:API field name for the serialized relation.
+     *
+     * @return string
+     */
+    public function serializedFieldName(): string;
+
+    /**
+     * Get the JSON representation of the relationship.
+     *
+     * @param object $model
+     * @param string $baseUri
+     * @return JsonApiRelation
+     */
+    public function serialize(object $model, string $baseUri): JsonApiRelation;
+}

src/Contracts/Schema/Container.php

@@ -23,13 +23,21 @@ interface Container
 {
 
     /**
-     * Get a schema by JSON API resource type.
+     * Get a schema by JSON:API resource type.
      *
      * @param string $resourceType
      * @return Schema
      */
     public function schemaFor(string $resourceType): Schema;
 
+    /**
+     * Get a schema for the provided model class.
+     *
+     * @param string|object $model
+     * @return Schema
+     */
+    public function schemaForModel($model): Schema;
+
     /**
      * Does a schema exist for the supplied resource type?
      *

src/Contracts/Schema/Field.php

@@ -23,7 +23,7 @@ interface Field
 {
 
     /**
-     * The JSON API field name.
+     * The JSON:API field name.
      *
      * @return string
      */