setup works

classes/ComicPressTagBuilder.inc

@@ -34,11 +34,17 @@ class ComicPressTagBuilder {
 		$this->parent_post = $parent_post;
 	}
 
+	public function _setup_postdata($post) { setup_postdata($post); }
+
 	public function __call($method, $arguments) {
 		$ok = false;
 		$return = $this;
 
 		switch ($method) {
+			case 'setup':
+				if (empty($this->post)) { throw new Exception('You need to have retrieved a post for setup to work'); }
+				$this->_setup_postdata($this->post);
+				return $this->post;
 			case 'next':
 			case 'previous':
 			case 'first':
@@ -88,6 +94,7 @@ class ComicPressTagBuilder {
 	const START_PARSE = 'start parse';
 	const HAS_POST_METHOD = 'has post method';
 	const HAS_EXTRACT_METHOD = 'has extract method';
+	const IS_SETUP = 'is setup';
 
 	public function parse_method($method_name, $extract_method_arguments = null) {
 		$methods = array();
@@ -98,6 +105,7 @@ class ComicPressTagBuilder {
 
 		$post_method = null;
 		$extract_method = null;
+		$is_setup = false;
 
 		while (!empty($parts)) {
 			$current = strtolower(array_shift($parts));
@@ -121,20 +129,35 @@ class ComicPressTagBuilder {
 				}
 
 				if (in_array($current, array('id', 'permalink', 'title', 'timestamp', 'date', 'post'))) {
-					if ($state == self::HAS_EXTRACT_METHOD) {
+					if ($is_setup) {
-						throw new ComicPressException('Only one extract method can be specified');
+						if ($current != 'post') {
+							throw new ComicPressException('You can only set up a post');
+						}
+						$extract_method = 'setup';
+					} else {
+						if ($state == self::HAS_EXTRACT_METHOD) {
+							throw new ComicPressException('Only one extract method can be specified');
+						}
+						$extract_method = $current;
+						$state = self::HAS_EXTRACT_METHOD;
 					}
-					$extract_method = $current;
-					$state = self::HAS_EXTRACT_METHOD;
 				}
 			}
 
-			if ($state == self::START_PARSE) {
+			if (in_array($state, array(self::START_PARSE, self::IS_SETUP))) {
-				if (in_array($current, array('first', 'previous', 'next', 'last'))) {
+				if ($current == 'setup') {
-					$post_method = $current;
+					if ($state == self::IS_SETUP) {
-					$state = self::HAS_POST_METHOD;
+						throw new ComicPressException('Setup need only be called once');
+					}
+					$is_setup = true;
+					$state = self::IS_SETUP;
 				} else {
-					throw new ComicPressException("${current} isn't allowed at this point");
+					if (in_array($current, array('first', 'previous', 'next', 'last'))) {
+						$post_method = $current;
+						$state = self::HAS_POST_METHOD;
+					} else {
+						throw new ComicPressException("${current} isn't allowed at this point");
+					}
 				}
 			}
 		}

test/ComicPressTagBuilderTest.php

@@ -54,13 +54,22 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 				),
 				array('get_first_post', array(2,3,4), 'current-post')
 			),
+			array(
+				array(
+					array('in', 2),
+					array('first'),
+					array('setup')
+				),
+				array('get_first_post', array(2,3,4), 'current-post'),
+				true
+			),
 		);
 	}
 
 	/**
 	 * @dataProvider providerTestBuilder
 	 */
-	function testStorylineBuilder($instructions, $expected_dbi_call) {
+	function testStorylineBuilder($instructions, $expected_dbi_call, $expects_setup_postdata = false) {
 		global $post, $wp_test_expectations;
 		$post = 'current-post';
 
@@ -70,6 +79,10 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 		$expectation = $dbi->expects($this->once())->method($method);
 		call_user_func_array(array($expectation, 'with'), $expected_dbi_call);
 
+		if ($expects_setup_postdata) {
+			call_user_func(array($expectation, 'will'), $this->returnValue('new-post'));
+		}
+
 		$core = new ComicPressTagBuilderFactory($dbi);
 
 		$storyline = new ComicPressStoryline();
@@ -89,6 +102,10 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 			$method = array_shift($instruction);
 			$core = call_user_func_array(array($core, $method), $instruction);
 		}
+
+		if ($expects_setup_postdata) {
+			$this->assertEquals('new-post', $post);
+		}
 	}
 
 	private function setupStorylineBuilderTest($for_exceptions = false) {
@@ -203,6 +220,14 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 					array('permalink'),
 				)
 			),
+			array(
+				'setup_first_post_in_category_1',
+				array(
+					array('in', 'category-1'),
+					array('first'),
+					array('setup')
+				)
+			)
 		);
 	}
 
@@ -216,7 +241,9 @@ class ComicPressTagBuilderTest extends PHPUnit_Framework_TestCase {
 	function providerTestMethodParserExceptions() {
 		return array(
 			array('first_in_'),
-			array('first_post_id')
+			array('first_post_id'),
+			array('setup_setup'),
+			array('setup_first_permalink')
 		);
 	}