fridge_bites/apps/Admin/Controllers/Abstract/AdminSingleController.php

<?php

namespace Lycoreco\Apps\Admin\Controllers\Abstract;

use Lycoreco\Includes\Model\{
    ValidationError,
    CustomDateTime
};
use Lycoreco\Includes\Routing\HttpExceptions;

abstract class AdminSingleController extends AdminBaseController
{
    protected $template_name = APPS_PATH . '/Admin/Templates/single-view.php';

    protected $model_сlass_name;

    /**
     * Router name to redirect new object
     * @var string
     */
    protected $object_router_name;

    /**
     * Relation form fields and model fields
     * array(
     *      [
     *          'model_field' => 'username',
     *          'input_type' => 'text',
     *          'dynamic_save'  => false,       // Default is true. If false, field won't save automatically. You can use before_save()
     *          'input_label' => 'My Username', // If not set, default is 'model_field' with Capitalize
     *          'input_attrs' => ['disabled', 'required', 'maxlength="50"'], // Default empty
     *          'input_values' => [ ['value_1', 'My Value 1'], ... ] // For select field. 
     *      ]
     * )
     * @var array
     */
    protected $fields = array();
    protected $field_title = 'field_id';
    protected $edit_title_template = 'Edit [:verbose] "[:field]"';
    protected $can_save = true;
    protected $is_new = false;

    /**
     * Function names with $object attribute.
     * ['the_last_feedbacks']
     * @var array
     */
    protected $component_widgets = array();
    protected $verbose_name = 'object';

    /**
     * Show model in admin panel
     * @param bool $is_new is new model (Create)?
     */
    public function __construct($is_new = false)
    {
        $this->is_new = $is_new;
        $this->context['is_new'] = $is_new;
    }

    /**
     * Custom model object
     * @return mixed
     */
    protected function get_model()
    {
        if (isset($this->__model))
            return $this->__model;

        if ($this->context['is_new']) {
            $this->__model = new $this->model_сlass_name();
        } else {
            $this->__model = $this->model_сlass_name::get(
                array(
                    [
                        'name' => 'obj.id',
                        'type' => '=',
                        'value' => $this->url_context['url_1']
                    ]
                )
            );
            if (empty($this->__model))
                throw new HttpExceptions\NotFound404();
        }
        return $this->__model;
    }

    public function get_context_data()
    {
        $context = parent::get_context_data();

        $object = $this->get_model();

        $context['object'] = $object;
        $context['verbose_name'] = $this->verbose_name;

        $context['edit_title'] = str_replace('[:verbose]', $this->verbose_name, $this->edit_title_template);
        if ($object->is_saved())
            $context['edit_title'] = str_replace('[:field]', $object->{$this->field_title}, $context['edit_title']);

        $context['object_table_name'] = $object->get_table_name();

        $context['fields'] = $this->fields;
        $context['can_save'] = $this->can_save;
        $context['component_widgets'] = $this->component_widgets;

        return $context;
    }
    /**
     * Some code for updating object before save
     * @param mixed $object
     * @return void
     */
    protected function before_save(&$object) {}
    protected function save(&$object)
    {
        $object->save();
    }

    protected function post()
    {
        $object = $this->get_model();

        foreach ($this->fields as $field) {
            // Exceptions
            if (gettype($field) == 'string')
                continue;

            if (isset($field['dynamic_save']))
                if ($field['dynamic_save'] === false)
                    continue;

            // Get value from fields
            $field_value = null;
            switch ($field['input_type']) {
                case 'checkbox':
                    $field_value = $_POST[$field['model_field']] ? true : false;
                    break;
                case 'image':
                    $file = $_FILES[$field['model_field']];
                    if (isset($file)) {
                        $path = upload_file($file, $this->model_сlass_name::get_table_name() . '/', 'image');

                        if (!empty($path)) {
                            $field_value = $path;
                        }
                    }
                    break;
                case 'datetime-local':
                    $datetime_text = $_POST[$field['model_field']] ?? null;
                    $datetime = new CustomDateTime();

                    if ($datetime_text)
                        $datetime = new CustomDateTime($datetime_text);

                    $field_value = $datetime;
                    break;

                default:
                    $field_value = $_POST[$field['model_field']] ?? null;
                    break;
            }

            // Set value to object
            $object->{'field_' . $field['model_field']} = $field_value;
        }

        try {
            $this->before_save($object);
            $this->save($object);

            // If object is new, redirect to his own page
            if ($this->context['is_new']) {
                $url = get_permalink($this->object_router_name, [$object->get_id()]);
                redirect_to($url);
            }

            $this->context['success_message'] = "The " . $this->verbose_name . " has been saved";
        } catch (ValidationError $ex) {
            $this->context['error_form'] = $ex;
        } catch (\Exception $ex) {
            if (DEBUG_MODE)
                $this->context['error_message'] = $ex->getMessage();
            else
                $this->context['error_message'] = "Unexpected Error";
        }
    }
}