Add create author mutation

Author: juffalow

README.md

@@ -163,6 +163,21 @@ query {
 }
 ```
 
+### Mutations
+
+#### Create new author
+
+```graphql
+mutation {
+  createAuthor(input:{firstName:"Fredrick", lastName:"Brooks"}) {
+    id
+    _id
+    firstName
+    lastName
+  }
+}
+```
+
 ## License
 
 [MIT license](./LICENSE)

src/mutations/CreateAuthor.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace mutations;
+
+use GraphQL\Type\Definition\ObjectType;
+use GraphQL\Type\Definition\Type;
+
+use types\Author As AuthorType;
+use types\inputs\Author As AuthorInputType;
+
+class CreateAuthor {
+  public static function get() {
+    return [
+      'type' => AuthorType::get(),
+      'args' => [
+        'input' => AuthorInputType::get(),
+      ],
+      'resolve' => function ($root, $args, $context) {
+        $context->service->logger->debug('CreateAuthorMutation', $args);
+
+        $input = $args['input'];
+
+        $firstName = isset($input['firstName']) && !empty($input['firstName']) ? $input['firstName'] : null;
+        $lastName = isset($input['lastName']) && !empty($input['lastName']) ? $input['lastName'] : null;
+
+        return $context->repository->author->create($firstName, $lastName);
+      }
+    ];
+  }
+}

src/repositories/AuthorRepository.php

@@ -77,9 +77,18 @@ public function update(int $id, ?string $firstName, ?string $lastName): ?AuthorM
 
   }
 
-  public function create(string $fistName, string $lastName): AuthorModel {
+  public function create(string $firstName, string $lastName): AuthorModel {
     $this->logger->debug('AuthorRepository->create', ['firstName' => $firstName, 'lastName' => $lastName]);
 
+    $id = $this->db->getConnection()
+      ->table('author')
+      ->insertGetId([
+        'name' => $firstName,
+        'last_name' => $lastName,
+      ]);
+
+    return new AuthorModel(['id' => $id, 'firstName' => $firstName, 'lastName' => $lastName]);
+
   }
 
   public function delete(int $id): ?AuthorModel {

src/schema/schema.php

@@ -8,6 +8,8 @@
 use queries\Quote as QuoteQuery;
 use queries\Quotes as QuotesQuery;
 
+use mutations\CreateAuthor as CreateAuthorMutation;
+
 return new Schema([
   'query' => new ObjectType([
     'name' => 'Query',
@@ -18,4 +20,10 @@
       'quotes' => QuotesQuery::get(),
     ]
   ]),
+  'mutation' => new ObjectType([
+    'name' => 'Mutation',
+    'fields' => [
+        'createAuthor' => CreateAuthorMutation::get(),
+    ]
+])
 ]);

src/types/inputs/Author.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace inputTypes;
+namespace types\inputs;
 
 use GraphQL\Type\Definition\Type;
 use GraphQL\Type\Definition\InputObjectType;
@@ -19,11 +19,11 @@ private static function create() {
     return new InputObjectType([
       'name' => 'AuthorInput',
       'fields' => [
-        'name' => [
+        'firstName' => [
           'type' => Type::nonNull(Type::string()),
-          'description' => 'Name of the author',
+          'description' => 'First name of the author',
         ],
-        'last_name' => [
+        'lastName' => [
           'type' => Type::nonNull(Type::string()),
           'description' => 'Last name of the author',
         ]