sam-api/app/Http/Requests/Api/V1/ModelFormula/CreateModelFormulaRequest.php

<?php

namespace App\Http\Requests\Api\V1\ModelFormula;

use Illuminate\Foundation\Http\FormRequest;

class CreateModelFormulaRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(): array
    {
        return [
            'name' => ['required', 'string', 'max:100'],
            'target_parameter' => ['required', 'string', 'max:50', 'regex:/^[a-zA-Z][a-zA-Z0-9_]*$/'],
            'expression' => ['required', 'string', 'max:1000'],
            'description' => ['nullable', 'string', 'max:500'],
            'is_active' => ['boolean'],
            'execution_order' => ['integer', 'min:0'],
        ];
    }

    /**
     * Get custom messages for validator errors.
     */
    public function messages(): array
    {
        return [
            'target_parameter.regex' => __('validation.model_formula.target_parameter_format'),
        ];
    }

    /**
     * Get custom attribute names for validator errors.
     */
    public function attributes(): array
    {
        return [
            'name' => __('validation.attributes.formula_name'),
            'target_parameter' => __('validation.attributes.target_parameter'),
            'expression' => __('validation.attributes.formula_expression'),
            'description' => __('validation.attributes.description'),
            'is_active' => __('validation.attributes.is_active'),
            'execution_order' => __('validation.attributes.execution_order'),
        ];
    }

    /**
     * Prepare the data for validation.
     */
    protected function prepareForValidation(): void
    {
        $this->merge([
            'is_active' => $this->boolean('is_active', true),
            'execution_order' => $this->integer('execution_order', 0),
        ]);
    }
}