From 13c2ff3734a2dc3e36ec7cdf03a654e4d522286e Mon Sep 17 00:00:00 2001
From: Cees-Jan Kiewiet <ceesjank@gmail.com>
Date: Tue, 31 Jan 2023 00:06:45 +0100
Subject: [PATCH] Add ClientInterface

---
 src/Generator.php                 |  6 ++
 src/Generator/Client.php          |  2 +-
 src/Generator/ClientInterface.php | 97 +++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 src/Generator/ClientInterface.php

diff --git a/src/Generator.php b/src/Generator.php
index 36d378a..336f012 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -4,6 +4,7 @@
 
 use ApiClients\Tools\OpenApiClientGenerator\Generator\Authentication;
 use ApiClients\Tools\OpenApiClientGenerator\Generator\Client;
+use ApiClients\Tools\OpenApiClientGenerator\Generator\ClientInterface;
 use ApiClients\Tools\OpenApiClientGenerator\Generator\Clients;
 use ApiClients\Tools\OpenApiClientGenerator\Generator\Operation;
 use ApiClients\Tools\OpenApiClientGenerator\Generator\Path;
@@ -146,6 +147,11 @@ private function all(string $namespace, string $rootPath): iterable
                 );
 
             }
+            yield from ClientInterface::generate(
+                $namespace,
+                $clients,
+                $schemaRegistry,
+            );
             yield from Client::generate(
                 $namespace,
                 $clients,
diff --git a/src/Generator/Client.php b/src/Generator/Client.php
index 055e89c..5b142e4 100644
--- a/src/Generator/Client.php
+++ b/src/Generator/Client.php
@@ -34,7 +34,7 @@ public static function generate(string $namespace, array $clients, SchemaRegistr
         $factory = new BuilderFactory();
         $stmt = $factory->namespace(rtrim($namespace, '\\'));
 
-        $class = $factory->class('Client')->makeFinal()->addStmt(
+        $class = $factory->class('Client')->implement(new Node\Name('ClientInterface'))->makeFinal()->addStmt(
             $factory->property('authentication')->setType('\\' . AuthenticationInterface::class)->makeReadonly()->makePrivate()
         )->addStmt(
             $factory->property('browser')->setType('\\' . Browser::class)->makeReadonly()->makePrivate()
diff --git a/src/Generator/ClientInterface.php b/src/Generator/ClientInterface.php
new file mode 100644
index 0000000..3528576
--- /dev/null
+++ b/src/Generator/ClientInterface.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace ApiClients\Tools\OpenApiClientGenerator\Generator;
+
+use ApiClients\Contracts\HTTP\Headers\AuthenticationInterface;
+use ApiClients\Tools\OpenApiClientGenerator\File;
+use ApiClients\Tools\OpenApiClientGenerator\SchemaRegistry;
+use cebe\openapi\spec\Operation as OpenAPiOperation;
+use cebe\openapi\spec\PathItem;
+use Jawira\CaseConverter\Convert;
+use League\OpenAPIValidation\Schema\Exception\SchemaMismatch;
+use PhpParser\Builder\Param;
+use PhpParser\BuilderFactory;
+use PhpParser\Comment\Doc;
+use PhpParser\Node;
+use PhpParser\Node\Arg;
+use PhpParser\Node\Stmt\Class_;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use React\Http\Browser;
+use React\Promise\PromiseInterface;
+use RingCentral\Psr7\Request;
+use Rx\Observable;
+
+final class ClientInterface
+{
+    /**
+     * @return iterable<Node>
+     * @throws \Jawira\CaseConverter\CaseConverterException
+     */
+    public static function generate(string $namespace, array $clients, SchemaRegistry $schemaRegistry): iterable
+    {
+        $factory = new BuilderFactory();
+        $stmt = $factory->namespace(rtrim($namespace, '\\'));
+
+        $class = $factory->interface('ClientInterface');
+        $operationCalls = [];
+        $callReturnTypes = [];
+
+        foreach ($clients as $operationGroup => $operations) {
+            $cn = str_replace('/', '\\', '\\' . $namespace . 'Operation/' . $operationGroup);
+            $casedOperationgroup = lcfirst($operationGroup);
+            foreach ($operations as $operationOperation => $operationDetails) {
+                $returnType = [];
+                foreach ($operationDetails['operation']->responses as $code => $spec) {
+                    $contentTypeCases = [];
+                    foreach ($spec->content as $contentType => $contentTypeSchema) {
+                        $fallbackName = 'Operation\\' . $operationGroup . '\\Response\\' . (new Convert(str_replace('/', '\\', $contentType) . '\\H' . $code ))->toPascal();
+                        $object = '\\' . $namespace . 'Schema\\' . $schemaRegistry->get($contentTypeSchema->schema, $fallbackName);
+                        $callReturnTypes[] = ($contentTypeSchema->schema->type === 'array' ? '\\' . Observable::class . '<' : '') . $object . ($contentTypeSchema->schema->type === 'array' ? '>' : '');
+                        $contentTypeCases[] = $returnType[] = $contentTypeSchema->schema->type === 'array' ? '\\' . Observable::class : $object;
+                    }
+                    if (count($contentTypeCases) === 0) {
+                        $returnType[] = $callReturnTypes[] = 'int';
+                    }
+                }
+                $operationCalls[] = [
+                    'operationGroupMethod' => $casedOperationgroup,
+                    'operationMethod' => lcfirst($operationOperation),
+                    'className' => str_replace('/', '\\', '\\' . $namespace . 'Operation\\' . $operationDetails['class']),
+                    'params' => iterator_to_array((function (array $operationDetails): iterable {
+                        foreach ($operationDetails['operation']->parameters as $parameter) {
+                            yield $parameter->name;
+                        }
+                    })($operationDetails)),
+                    'returnType' => $returnType,
+                ];
+            }
+            $class->addStmt(
+                $factory->method($casedOperationgroup)->setReturnType($cn)->makePublic()
+            );
+        }
+
+        $class->addStmt(
+            $factory->method('call')->makePublic()->setReturnType(
+                new Node\Name('\\' . PromiseInterface::class)
+            )->setDocComment(
+                new Doc(implode(PHP_EOL, [
+                    '/**',
+                    ' * @return \\' . PromiseInterface::class . '<' . implode('|', array_unique($callReturnTypes)) . '>',
+                    ' */',
+                ]))
+            )->addParam((new Param('call'))->setType('string'))->addParam((new Param('params'))->setType('array')->setDefault([]))
+        );
+
+        $class->addStmt(
+            $factory->method('hydrateObject')->makePublic()->setReturnType('object')->addParam(
+                (new Param('className'))->setType('string')
+            )->addParam(
+                (new Param('data'))->setType('array')
+            )
+        );
+
+        yield new File($namespace . '\\' . 'ClientInterface', $stmt->addStmt($class)->getNode());
+    }
+}