✨ Add a service which find automatically all the Has*Relations in Model.

src/Helpers/RelationsInModelFinder.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace MathieuTu\JsonImport\Helpers;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
+
+class RelationsInModelFinder
+{
+    private $model;
+    /**
+     * @var
+     */
+    private $relationsType;
+
+    public function __construct(Model $model, array $relationsType)
+    {
+        $this->model = $model;
+        $this->relationsType = $relationsType;
+    }
+
+    public static function children(Model $model)
+    {
+        return (new static($model, ['hasMany', 'hasManyThrough', 'hasOne']))->find();
+    }
+
+    protected function find()
+    {
+        return collect(get_class_methods($this->model))->sort()
+            ->reject(function ($method) {
+                $this->isAnEloquentMethod($method);
+            })->filter(function ($method) {
+                $code = $this->getMethodCode($method);
+                collect($this->relationsType)->contains(function ($relation) use ($code) {
+                    return Str::contains($code, '$this->' . $relation . '(');
+                });
+            });
+    }
+
+    protected function isAnEloquentMethod($method): bool
+    {
+        return Str::startsWith($method, 'get') ||
+            Str::startsWith($method, 'set') ||
+            Str::startsWith($method, 'scope') ||
+            method_exists(Model::class, $method);
+    }
+
+    protected function getMethodCode($method): string
+    {
+        $reflection = new \ReflectionMethod($this->model, $method);
+
+        $file = new \SplFileObject($reflection->getFileName());
+        $file->seek($reflection->getStartLine() - 1);
+
+        $code = '';
+        while ($file->key() < $reflection->getEndLine()) {
+            $code .= $file->current();
+            $file->next();
+        }
+        $code = trim(preg_replace('/\s\s+/', '', $code));
+
+        return $code;
+    }
+
+}