README

A definition-driven page builder for Canvas that turns structured PHP definitions into interactive admin pages — forms, settings panels, editors — with automatic data binding and WakaPAC initialisation.

Installation

composer require quellabs/canvas-loom

Quick Start

use Quellabs\Canvas\Loom\Loom;
use Quellabs\Canvas\Loom\Builder\Resource;
use Quellabs\Canvas\Loom\Builder\Section;
use Quellabs\Canvas\Loom\Builder\Field;

$definition = Resource::make('post-form', '/admin/posts/save')
    ->title('Edit Post')
    ->add(Section::make()
        ->add(Field::text('title', 'Title')->required())
        ->add(Field::textarea('body', 'Content')->rows(10))
    )
    ->build();

$loom = new Loom();
echo $loom->render($definition, [
    'title' => 'My First Post',
    'body'  => 'Hello world.',
]);

How It Works

You build a node tree using fluent PHP builders. Loom::render() walks the tree, delegates each node to a renderer, and emits HTML with the appropriate WakaPAC initialisation scripts. Entity data passed to render() is automatically distributed to field values via DOM hydration.

Node Types

Node	Purpose
`Resource`	Page root — renders a `<form>` with header, title, save/cancel
`Section`	Visual grouping without WakaPAC init
`Tabs` / `Tab`	Tabbed interface managed by WakaPAC
`Panel`	Reactive WakaPAC container without tabs
`Columns` / `Column`	Flex layout with percentage widths
`Field`	Input with label, validation, and data binding
`Text`	Read-only label/value pair, supports interpolation
`Button`	Action trigger bound to WakaPAC expressions

Fields

Field::text('title', 'Title')->required()->maxlength(200)
Field::textarea('body', 'Content')->rows(10)
Field::select('status', 'Status')->options(['draft' => 'Draft', 'published' => 'Published'])
Field::checkbox('featured', 'Featured post')
Field::number('priority', 'Priority')->min(1)->max(10)

Dependent dropdowns are supported via ->dependsOn('parent_field'). Dependent fields must be direct siblings within the same Column or Section.

Buttons

Buttons execute WakaPAC expressions via ->action(). Three variants: primary (default), ->secondary(), ->danger().

Button::make('Save')->action('submit()')
Button::make('Publish')->action("post('/admin/posts/publish')")
Button::make('Delete')->danger()->action("Stdlib.sendMessage('post-form', MSG_DELETE, 0, 0)")

Every container exposes submit() and post(url) on its WakaPAC abstraction automatically.

Abstraction

Named message constants and other non-reactive properties can be added to a container's WakaPAC abstraction. Underscore-prefixed keys are non-reactive.

Resource::make('post-form', '/admin/posts/save')
    ->abstraction([
        '_MSG_SHOW_DELETE' => 1001,
        '_MSG_HIDE_DELETE' => 1002,
    ]);

Notifications

$loom = new Loom();
$loom->notification('success', 'Post saved.');
$loom->notification('error', 'Title is required.');
echo $loom->render($definition, $data);

Types: success, error, warning, info.

Custom Renderers

Extend AbstractRenderer, implement RendererInterface, and register on the Loom instance:

$loom = new Loom();
$loom->register('field', MapFieldRenderer::class);
echo $loom->render($definition, $data);

To override only specific nodes within a type, check the node properties and delegate to the default renderer for everything else.

quellabs / canvas-loom

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