new-project.php

<?php

require_once 'init.php';
require_once 'model.php';
require_once 'helpers.php';
require_once 'myfunction.php';

if (empty($_SESSION['user'])) {
    $page_content = include_template('guest.php');
    $project_id = null;
    $projects = [];

    $navigation_content = include_template(
        'navigation.php',
        [
            'user' => $_SESSION['user'],
            'projects' => $projects,
            'project_id' => $project_id,
            'content' => $page_content
        ]
    );

    $layout_content = include_template(
        'layout.php',
        [
            'user' => $_SESSION['user'],
            'navigation' => $navigation_content,
            'title' => 'Дела в порядке'
        ]
    );
} else {
    $project_id = filter_input(INPUT_GET, 'project_id', FILTER_SANITIZE_NUMBER_INT);
    $projects = get_projects($con, $user_id);
    $projects_ids = array_column($projects, 'id');

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        $required = ['name'];
        $errors = [];
        $rules = [
            'name' => function ($value) {
                return validate_name($value);
            }
        ];

        $project_form = filter_input_array(
            INPUT_POST,
            [
                'name' => FILTER_DEFAULT
            ],
            true
        );

        foreach ($project_form as $key => $value) {
            if (!empty($rules[$key])) {
                $rule = $rules[$key];
                $errors[$key] = $rule($value);
            }

            if (in_array($key, $required) && empty($value)) {
                $errors[$key] = "Поле $key надо заполнить";
            }
        }

        $errors = array_filter($errors);

        if (!count($errors) and check_name_project($projects, $project_form)) {
            $errors['name'] = 'У вас уже есть такой проект';
        } elseif (!count($errors) and !check_name_project($projects, $project_form)) {
            $result = add_project($con, $project_form, $user_id);
            if ($result) {
                $project_id = mysqli_insert_id($con);
                header("Location: index.php");
            }
        }
        if (count($errors)) {
            $page_content = include_template(
                'add-project.php',
                [
                    'errors' => $errors
                ]
            );
        }
    } else {
        $page_content = include_template('add-project.php');
    }
    $navigation_content = include_template(
        'navigation.php',
        [
            'user' => $_SESSION['user'],
            'projects' => $projects,
            'project_id' => $project_id,
            'content' => $page_content
        ]
    );

    $layout_content = include_template(
        'layout.php',
        [
            'user' => $_SESSION['user'],
            'navigation' => $navigation_content,
            'title' => 'Дела в порядке'
        ]
    );
}

print($layout_content);