Auto-link URLs in plain text content

Use WordPress's make_clickable() function to automatically convert
URLs in plain text content to clickable links. This only applies
to plain text content, not HTML content which is preserved as-is.

Fixes #303

Author: pfefferle

includes/rest/class-endpoint-controller.php

@@ -831,7 +831,8 @@ protected function mp_to_wp( $mf2 ) {
 				$args['post_content'] = $content['html'] ? $content['html'] :
 							\htmlspecialchars( $content['value'] );
 			} elseif ( $content ) {
-				$args['post_content'] = \htmlspecialchars( $content );
+				// Auto-link URLs in plain text content.
+				$args['post_content'] = \make_clickable( \htmlspecialchars( $content ) );
 			}
 		}
 

tests/test_endpoint.php

@@ -815,4 +815,86 @@ function test_create_publish_default_status() {
 			$post  = self::check_create( self::create_json_request( $input ) );
 			$this->assertEquals( 'publish', $post->post_status );
 	}
+
+	function test_create_plain_text_autolinks_urls() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array( 'Check out https://example.com for more info' ),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// URLs in plain text content should be auto-linked.
+		$this->assertStringContainsString( '<a href="https://example.com"', $post->post_content );
+		$this->assertStringContainsString( 'https://example.com</a>', $post->post_content );
+	}
+
+	function test_create_plain_text_autolinks_multiple_urls() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array( 'Visit https://example.com and http://test.org today' ),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// Both URLs should be auto-linked.
+		$this->assertStringContainsString( '<a href="https://example.com"', $post->post_content );
+		$this->assertStringContainsString( '<a href="http://test.org"', $post->post_content );
+	}
+
+	function test_create_html_content_not_autolinked() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array(
+					array( 'html' => '<p>Visit https://example.com today</p>' ),
+				),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// HTML content should not be auto-linked (preserved as-is).
+		$this->assertEquals( '<p>Visit https://example.com today</p>', $post->post_content );
+	}
+
+	function test_create_html_content_existing_link_preserved() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array(
+					array( 'html' => '<p>Visit <a href="https://example.com">my site</a> today</p>' ),
+				),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// Existing links in HTML content should be preserved.
+		$this->assertEquals( '<p>Visit <a href="https://example.com">my site</a> today</p>', $post->post_content );
+	}
+
+	function test_create_html_content_code_block_preserved() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array(
+					array( 'html' => '<p>Example: <code>https://example.com/api</code></p>' ),
+				),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// URLs in code blocks should not be auto-linked.
+		$this->assertEquals( '<p>Example: <code>https://example.com/api</code></p>', $post->post_content );
+	}
+
+	function test_create_html_content_pre_block_preserved() {
+		$input = array(
+			'type'       => array( 'h-entry' ),
+			'properties' => array(
+				'content' => array(
+					array( 'html' => '<pre>curl https://example.com/api</pre>' ),
+				),
+			),
+		);
+		$post  = self::check_create( self::create_json_request( $input ) );
+		// URLs in pre blocks should not be auto-linked.
+		$this->assertEquals( '<pre>curl https://example.com/api</pre>', $post->post_content );
+	}
 }