Martin Slachta
79 lines
2.1 KiB
PHP
79 lines
2.1 KiB
PHP
<?php
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namespace Reservair\Layout;
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/**
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* Fluent builder for multi-column admin page layouts.
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*
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* Lets a page declare the shape it wants (e.g. a two-column split) without
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* committing to any markup or styling. Each column's content is supplied as a
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* callable that echoes — inline HTML and <script> blocks work as usual.
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*
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* Usage:
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* RsvColumnLayout::split('1:2')
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* ->column(function () { ?>
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* <h2>Add timetable</h2>
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* ...
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* <?php })
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* ->column(function () { ?>
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* <div id="availability_table"></div>
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* ...
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* <?php })
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* ->output();
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*/
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class RsvColumnLayout
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{
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/** @var list<callable():void> Column content, in left-to-right order. */
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private array $columns = [];
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/** @var list<int> Relative column weights, parsed from the ratio. */
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private array $weights;
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private function __construct(string $ratio)
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{
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$this->weights = array_map('intval', explode(':', $ratio));
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}
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/**
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* Side-by-side columns that stack on narrow screens.
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*
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* @param string $ratio Relative column widths, e.g. '1:1', '1:2'.
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*/
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public static function split(string $ratio = '1:1'): static
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{
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return new static($ratio);
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}
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/** Adds the next column. $render echoes the column's content. */
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public function column(callable $render): static
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{
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$this->columns[] = $render;
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return $this;
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}
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public function render(): string
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{
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$cols = '';
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foreach ($this->columns as $i => $render) {
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$grow = $this->weights[$i] ?? end($this->weights) ?: 1;
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$cols .= '<div class="rsv-col" style="--rsv-col-grow:' . (int) $grow . '">'
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. $this->capture($render)
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. '</div>';
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}
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return '<div class="rsv-cols">' . $cols . '</div>';
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}
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public function output(): void
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{
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echo $this->render();
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}
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/** Runs an echoing callable and returns what it printed. */
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private function capture(callable $render): string
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{
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ob_start();
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$render();
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return ob_get_clean();
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}
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}
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