Form controller shall receive data from structure field

The CMS Questions
1

Hi there,

my form controller shall receive the input for the fields from a structure field.

I am working with this: https://getkirby.com/docs/cookbook/forms/basic-contact-form):

Basically I want to replace this in the controller:

$data = [
    'name'  => get('name'),
    'email' => get('email'),
    'text'  => get('text')
];

with something like this:

    foreach(page()->form()->toStructure() as $item):
        $data[] = $item->name();
    endforeach;

It seems to be a problem with the array, but I don’t get it, when I submit the form I get the error: Illegal offset type in isset or empty

Any idea?

2

Two issues:

foreach(page()->form()->toStructure() as $item):
    $data['name'] = $item->name()->value();
    // etc. for other key/value pairs
endforeach;

Note that this will create a nested array.

But I’m not sure what you want to achieve here.

3

Well my goal is that my client can add form fields in the panel (and nobody has to deal with the controller.php). I know I need to take care of $rules and $messages (in controller) too and there plugin solutions but I wanted (to try) to do it myself.

The error (Illegal offset type in isset or empty) is gone, but still get the The form could not be sent - need to further investigate.

Thanks for now.

4

Maybe you can post the complete code, including Panel blueprint, controller and form.

Because $data is supposed to be the data that comes in through the form, so it doesn’t really make sense to fill that array with data from the content file?

5

On a side note: Are you aware of the formbuilder plugin: https://getkirby.com/plugins/cre8ivclick/formbuilder

6

Right, $data shouldn’t be filled. But the fields in it need to be dynamic depending on what comes from the panel via page()->form()->toStructure().

And make that dynamic:

   $data = [    
        'name'  => get('name'),
        'email' => get('email'),
        'text'  => get('text'),
    ];

controller:

<?php

return function($kirby, $pages, $page) {

    $alert = null;

    if($kirby->request()->is('POST') && get('submit')) {

        // check the honeypot
        if(empty(get('website')) === false) {
            go($page->url());
            exit;
        }

        foreach(page()->form()->toStructure() as $item):
            $data['name'] = $item->name()->value();
            // etc. for other key/value pairs
        endforeach;
        
#        $data = [    
#            'name'  => get('name'),
#            'email' => get('email'),
#            'text'  => get('text'),
#        ];

        $rules = [
            'name'  => ['required', 'min' => 3],
            'email' => ['required', 'email'],
            'text'  => ['required', 'min' => 3, 'max' => 3000],
        ];

        $messages = [
            'name'  => 'Please enter a valid name',
            'email' => 'Please enter a valid email address',
            'text'  => 'Please enter a text between 3 and 3000 characters',
        ];

        
        // some of the data is invalid
        if($invalid = invalid($data, $rules, $messages)) {
            $alert = $invalid;

            // the data is fine, let's send the email
        } else {
            try {

                $kirby->email([
                    'template' => 'form',
                    'from'     => 'yourcontactform@yourcompany.com',
                    'replyTo'  => $data['email'],
                    'to'       => 'you@yourcompany.com',
                    'subject'  => esc($data['name']) . ' sent you a message from your contact form',

                    'data'     => [
                        'text'   => esc($data['text']),
                        'name' => esc($data['name']),
                        'email' => esc($data['email']),
                    ]
                ]);

            } catch (Exception $error) {
                $alert['error'] = "<br>The form could not be sent";
            }

            // no exception occured, let's send a success message
            if (empty($alert) === true) {
      
                $success = '<p class="center pri">Ihre Anfrage wurde erfolgreich versendet. Vielen Dank!<br>Wir melden uns bei Ihnen umgehend!</p>';

                $data = [];
            }
        }
    }

    return [
        'alert'   => $alert,
        'data'    => $data ?? false,
        'success' => $success ?? false,
    ];
};

blueprint:

title: form
columns:
  main:
    width: 2/3
    fields:
      text:
        type: textarea
      form:
        type: structure
        fields:
          name:
            type: text
            width: 1/4
          type:
            type: select
            default: text
            width: 1/4
            options:
              text: text
              email: email
              textarea: textarea
              selection: selection
          text:
            type: text
          option:
            type: structure
            fields:
              name:
                type: text
                width: 1/4
          image:
            type: files
            uploads: 
            parent: site
            template: files-upload

form:

    <?php if($success): ?>
    <div class="alert success">
        <p><?= $success ?></p>
    </div>
    <?php else: ?>
    <?php if (isset($alert['error'])): ?>
        <div><?= $alert['error'] ?></div>
    <?php endif ?>

    <form method="post" action="<?= $page->url() ?>" style="margin: auto;">

    <div class="honeypot">
        <label for="website">Website <abbr title="required">*</abbr></label>
        <input type="website" id="website" name="website">
    </div>

        <?php foreach($page->form()->toStructure() as $item): ?>

            <?php if($item->type() == 'text'): ?>

                <div class="form-element <?= $item->name()->value() ?>">
                    <label for="<?= $item->name()->value() ?>">
                    <?= $item->name()->value() ?> <abbr title="required">*</abbr>
                    </label>
                    <input type="<?= $item->type() ?>" id="<?= $item->name()->value() ?>" name="<?= $item->name()->value() ?>" value="<?= $data[$item->name()->value()] ?? '' ?>" required>
                    <?= isset($alert[$item->name()->value()]) ? '<span class="alert error">' . html($alert[$item->name()->value()]) . '</span>' : '' ?>
                </div>

            <?php elseif($item->type() == 'email'): ?>

                <div class="form-element <?= $item->name()->value() ?>">
                    <label for="<?= $item->name()->value() ?>">
                    <?= $item->name()->value() ?> <abbr title="required">*</abbr>
                    </label>
                    <input type="<?= $item->type() ?>" id="<?= $item->name()->value() ?>" name="<?= $item->name()->value() ?>" value="<?= $data[$item->name()->value()] ?? '' ?>" required>
                    <?= isset($alert[$item->name()->value()]) ? '<span class="alert error">' . html($alert[$item->name()->value()]) . '</span>' : '' ?>
                </div>

            <?php elseif($item->type() == 'textarea'): ?>

                <div class="form-element <?= $item->name()->value() ?>">
                    <label for="<?= $item->name()->value() ?>">
                    <?= $item->name()->value() ?> <abbr title="required">*</abbr>
                    </label>
                    <textarea id="<?= $item->name()->value() ?>" name="<?= $item->name()->value() ?>" required>
                        <?= $data[$item->name()->value()]?? '' ?>
                    </textarea>
                    <?= isset($alert[$item->name()->value()]) ? '<span class="alert error">' . html($alert[$item->name()->value()]) . '</span>' : '' ?>
                </div>

            <?php elseif($item->type() == 'selection'): ?>

            <div class="container form-selection <?= $item->name()->value() ?>">

                <p><?= $item->text() ?></p>
                
                <div class="container row">

                <?php foreach($item->option()->toStructure() as $option): ?>
                
                    <div class="form-element <?= $item->name()->value() ?>-<?= $option->name() ?>">
                        <label for="<?= $item->name()->value() ?>">
                            <?= $option->name() ?>
                        </label>

                        <input type="radio" id="<?= $option->name() ?>" name="<?= $item->name()->value() ?>" value="<?= $option->name() ?>" required>
                            <?= isset($alert[$item->name()]) ? '<span class="alert error">' . html($alert[$item->name()]) . '</span>' : '' ?>                        
                    </div>

                <?php endforeach ?>

                </div>

            </div>

            <?php else: ?>

                ! NO FIELD CONFIGURED !

            <?php endif ?>

        <?php endforeach ?>

        <input type="submit" name="submit" value="senden">

    </form>
    <?php endif ?>
7 
<?php
$fieldnames = $page->form()->toStructure()->pluck('name', ',');
$data = [];

foreach ($fieldnames as $fieldname) {

   $data[trim($fieldname)] = get(trim($fieldname));

}
dump($data)