TODO: Move Panel-Related Function to a Dedicated Namespace

[taufik-nurrohman]

Developer should construct the GUI function as _\lot\x\panel\type\button(array $in, $key) instead of _\lot\x\panel\button(array $in, $key) to be used in the GUI data like so:

[
    'g' => [
        'title' => 'Update',
        // This calls `_\lot\x\panel\type\button()`
        'type' => 'button',
        'skip' => 's' === $_['task'],
        'stack' => 10
    ],
    'l' => [
        'title' => 'Delete',
        // This calls `_\lot\x\panel\type\button\link()`
        'type' => 'button/link',
        'stack' => 20
    ],
    's' => [
        'title' => 'Save',
        // This calls `_\lot\x\panel\type\button\text()`
        'type' => 'button/text',
        'stack' => 30
    ]
]

Most of function names that bound to the _\lot\x\panel namespace are added to be used by the type property such as button, link, and text. But some categories are no longer suitable to be declared under this namespace because they cannot be used as a valid type data. One example is the route category. Every functions under _\lot\x\panel\route namespace are intended to be used as custom routes.

My categorization plan for the future is like this:

• _\lot\x\panel\* → Generic function for the panel extension.
• _\lot\x\panel\form\error\* → Form data validator.
• _\lot\x\panel\form\info\* → Form data filter and sanitizer.
• _\lot\x\panel\route\* → Custom panel routes.
• _\lot\x\panel\task\{f,g,l,s}\* → Hook function to be used in the form action.
• _\lot\x\panel\type\* → Custom panel GUI that returns HTML markup.

[taufik-nurrohman]

Helper function should be attached to the function call scope to be used easily by third-party extensions:

namespace _\lot\x\panel\h;

function field(array $value, $key) {
    $out = /* … */;
    return new \HTML($out);
}

namespace _\lot\x\panel\type\field;

function text(array $value, $key) {
    $out = $this->field($value, $key);
    $out['content'][0] = 'input';
    $out['content'][1] = false;
    return $out;
}

// …
$v = "\\_\\lot\\x\\panel\\type";
$type = $value['type'] ?? "";
return \fire($v . ($type ? "\\" . $type : ""), [$value, $key], (object) [
    'description' => "\\_\\lot\\x\\panel\\h\\description",
    'field' => "\\_\\lot\\x\\panel\\h\\field",
    'title' => "\\_\\lot\\x\\panel\\h\\title"
]);