WP-API · danielbachhuber · Feb 19, 2016 · Feb 13, 2016 · Feb 18, 2016 · Feb 19, 2016
diff --git a/lib/endpoints/class-wp-rest-comments-controller.php b/lib/endpoints/class-wp-rest-comments-controller.php
@@ -135,6 +135,17 @@ public function get_items( $request ) {
 			'author__not_in'  => $request['author_exclude'],
 		);

+		$prepared_args['date_query'] = array();
+		// Set before into date query. Date query must be specified as an array of an array.
+		if ( isset( $request['before'] ) ) {
+			$prepared_args['date_query'][0]['before'] = $request['before'];
+		}
+
+		// Set after into date query. Date query must be specified as an array of an array.
+		if ( isset( $request['after'] ) ) {
+			$prepared_args['date_query'][0]['after'] = $request['after'];
+		}
+
 		if ( empty( $request['offset'] ) ) {
 			$prepared_args['offset'] = $prepared_args['number'] * ( absint( $request['page'] ) - 1 );
 		}
@@ -924,6 +935,12 @@ public function get_collection_params() {

 		$query_params['context']['default'] = 'view';

+		$query_params['after'] = array(
+			'description'       => __( 'Limit response to resources published after a given ISO8601 compliant date.' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
 		$query_params['author'] = array(
 			'description'       => __( 'Limit result set to comments assigned to specific user ids. Requires authorization.' ),
 			'sanitize_callback' => 'wp_parse_id_list',
@@ -944,6 +961,12 @@ public function get_collection_params() {
 			'validate_callback' => 'rest_validate_request_arg',
 			'type'              => 'string',
 		);
+		$query_params['before'] = array(
+			'description'       => __( 'Limit response to resources published before a given ISO8601 compliant date.' ),
+			'type'              => 'string',
+			'format'            => 'date-time',
+			'validate_callback' => 'rest_validate_request_arg',
+		);
 		$query_params['exclude'] = array(
 			'description'        => __( 'Ensure result set excludes specific ids.' ),
 			'type'               => 'array',

diff --git a/tests/test-rest-comments-controller.php b/tests/test-rest-comments-controller.php
@@ -82,9 +82,11 @@ public function test_registered_query_params() {
 		$keys = array_keys( $data['endpoints'][0]['args'] );
 		sort( $keys );
 		$this->assertEquals( array(
+			'after',
 			'author',
 			'author_email',
 			'author_exclude',
+			'before',
 			'context',
 			'exclude',
 			'include',
@@ -454,6 +456,37 @@ public function test_get_comments_pagination_headers() {
 		$this->assertFalse( stripos( $headers['Link'], 'rel="next"' ) );
 	}

+	public function test_get_comments_invalid_date() {
+		$request = new WP_REST_Request( 'GET', '/wp/v2/comments' );
+		$request->set_param( 'after', rand_str() );
+		$request->set_param( 'before', rand_str() );
+		$response = $this->server->dispatch( $request );
+		$this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
+	}
+
+	public function test_get_comments_valid_date() {
+		$comment1 = $this->factory->comment->create( array(
+			'comment_date'    => '2016-01-15T00:00:00Z',
+			'comment_post_ID' => $this->post_id,
+		) );
+		$comment2 = $this->factory->comment->create( array(
+			'comment_date'    => '2016-01-16T00:00:00Z',
+			'comment_post_ID' => $this->post_id,
+		) );
+		$comment3 = $this->factory->comment->create( array(
+			'comment_date'    => '2016-01-17T00:00:00Z',
+			'comment_post_ID' => $this->post_id,
+		) );
+
+		$request = new WP_REST_Request( 'GET', '/wp/v2/comments' );
+		$request->set_param( 'after', '2016-01-15T00:00:00Z' );
+		$request->set_param( 'before', '2016-01-17T00:00:00Z' );
+		$response = $this->server->dispatch( $request );
+		$data = $response->get_data();
+		$this->assertCount( 1, $data );
+		$this->assertEquals( $comment2, $data[0]['id'] );
+	}
+
 	public function test_get_item() {
 		$request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/comments/%d', $this->approved_id ) );