Copy directives from #118

src/directives/utils.php

@@ -0,0 +1,13 @@
+<?php
+
+function get_from_context( $expr, $context ) {
+	$path = explode( '.', $expr );
+	if ( count( $path ) > 0 && 'context' === $path[0] ) {
+		array_shift( $path );
+		$result = $context;
+		foreach( $path as $key ) {
+			$result = $result[$key];
+		}
+	}
+    return $result;
+}

src/directives/wp-bind.php

@@ -0,0 +1,23 @@
+<?php
+
+require_once __DIR__ . '/utils.php';
+
+function process_wp_bind( &$tags, &$context ) {
+	if ( $tags->is_tag_closer() ) {
+		return;
+	}
+
+	$prefixed_attributes = $tags->get_attributes_by_prefix( 'wp-bind:' );
+
+	foreach( $prefixed_attributes as $name => $expr ) {
+		$attr_parts = explode( ':', $name );
+		if ( count( $attr_parts ) < 2 ) {
+			continue;
+		}
+		$bound_attr = $attr_parts[1];
+
+		// TODO: Properly parse $value.
+		$value = get_from_context( $expr, $context->get_context() );
+		$tags->set_attribute( $bound_attr, $value );
+	}
+}

src/directives/wp-context.php

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+<?php
+
+class WP_Directive_Context {
+	protected $stack = array( array() );
+
+    function __construct( $context = array() ) {
+		$this->set_context( $context );
+    }
+
+	public function get_context() {
+		return end( $this->stack );
+	}
+
+	public function set_context( $context ) {
+		array_push( $this->stack, array_replace_recursive( $this->get_context(), $context ) );
+	}
+
+	public function rewind_context() {
+		array_pop( $this->stack );
+	}
+}
+
+function process_wp_context( &$tags, &$context ) {
+	if ( 'WP-CONTEXT' === $tags->get_tag() ) {
+		if ( $tags->is_tag_closer() ) {
+			$context->rewind_context();
+			return;
+		}
+		$value = $tags->get_attribute( 'data' );
+	} else {
+		// TODO: Implement rewinding context upon matching closing tag.
+		$value = $tags->get_attribute( 'wp-context' );
+	}
+
+	if ( null === $value ) {
+		// No wp-context directive.
+		return;
+	}
+
+	$new_context = json_decode( $value, true );
+	// TODO: Error handling.
+
+	$context->set_context( $new_context );
+}

src/directives/wp-show.php

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+<?php
+
+require_once __DIR__ . '/utils.php';
+
+function process_wp_show( &$tags, &$context ) {
+	if ( $tags->is_tag_closer() ) {
+		return;
+	}
+
+	if ( 'WP-SHOW' === $tags->get_tag() ) {
+		$value = $tags->get_attribute( 'when' );
+	} else {
+		$value = $tags->get_attribute( 'wp-data' );
+	}
+
+	if ( null === $value ) {
+		return;
+	}
+
+	// TODO: Properly parse $value.
+	$show = get_from_context( $value, $context->get_context() );
+
+	if( ! $show ) {
+		// $content = $tags->get_content_inside_balanced_tags()
+		// $tags->set_content_inside_balanced_tags( '<template>' . $content . '</template>' );
+	}
+}