ok it's working

classes/PostFixtures.inc

@@ -1,6 +1,96 @@
 <?php
 
 class PostFixtures {
+	var $messages;
+
+	function init() {
+		add_action('admin_menu', array(&$this, 'admin_menu'));
+		add_action('admin_notices', array(&$this, 'admin_notices'));
+	}
+
+	function admin_notices() {
+		if (!empty($this->messages)) { ?>
+			<div class="fade updated">
+				<?php foreach ($this->messages as $message) { ?>
+					<p><?php echo $message ?></p>
+				<?php } ?>
+			</div>
+		<?php }
+	}
+
+	function handle_update($info) {
+		if (isset($info['is_ok'])) {
+      $data = $this->parse_json(stripslashes($info['data']));
+      if (!empty($data)) {
+      	$data = $this->process_data($data);
+      	$this->remove();
+      	$this->create($data);
+      	$this->messages[] = "New data set loaded into WordPress.";
+      } else {
+      	$this->messages[] = "Data is not valid JSON.";
+      }
+		}
+	}
+
+	function admin_menu() {
+		global $plugin_page;
+
+		add_submenu_page('tools.php', __('Post Fixtures', 'post-fixtures'), __('Post Fixtures', 'post-fixtures'), 'manage_options', 'post-fixtures', array(&$this, 'render_admin'));
+
+		if ($plugin_page == 'post-fixtures') {
+			wp_enqueue_script('jquery');
+		}
+
+		if (isset($_POST['pf'])) {
+			if (isset($_POST['pf']['_nonce'])) {
+				if (wp_verify_nonce($_POST['pf']['_nonce'], 'post-fixtures')) {
+					$this->handle_update($_POST['pf']);
+				}
+			}
+		}
+	}
+
+	function render_admin() { ?>
+		<div class="wrap">
+			<h2><?php _e('Post Fixtures', 'post-fixtures') ?></h2>
+
+			<p>
+				<?php _e('<strong>Post Fixtures</strong> is a developer tool for quickly setting up the WordPress database to test certain combinations of posts, categories, and meta data.', 'post-fixtures'); ?>
+				<?php _e('<strong>You should not have this installed on a live site!</strong>', 'post-fixtures'); ?>
+				<?php _e('This tool <strong>will delete all of your posts, categories, and metadata as necessary!</strong>', 'post-fixtures'); ?>
+			</p>
+
+			<form action="" method="post" id="post-fixtures-form">
+				<input type="hidden" name="pf[_nonce]" value="<?php echo wp_create_nonce('post-fixtures') ?>" />
+				<h3><?php _e('JSON data to load into the database:', 'post-fixtures') ?></h3>
+				<textarea name="pf[data]" rows="20" style="width: 100%"></textarea>
+				<label style="margin: 5px 0; display: block">
+					<input type="checkbox" name="pf[is_ok]" value="yes" /> <?php _e('Yes, I want Post Fixtures to <strong>delete all of my data and load this data instead.</strong>', 'post-fixtures') ?><br />
+				</label>
+				<input type="submit" value="Load Provided Data" />
+			</form>
+			<script type="text/javascript">
+				var form = jQuery('#post-fixtures-form').get(0);
+				if (form) {
+					jQuery(form).submit(function() {
+						var checkbox = jQuery('input[name*=is_ok]', form).get(0);
+						var ok = false;
+						if (checkbox) {
+							ok = checkbox.checked;
+						}
+						if (!ok) {
+							alert('<?php _e('You must check the checkbox to approve this operation.', 'post-fixtures') ?>');
+							return false;
+						}
+						return true;
+					});
+				}
+			</script>
+		</div>
+	<?php }
+
+	// data handling
+
 	function parse_json($input) {
 		if (($data = json_decode($input)) !== false) {
 			if (is_array($data) || is_object($data)) {
@@ -11,7 +101,7 @@ class PostFixtures {
 	}
 
 	function remove_all_posts() {
-		if (is_array($posts = get_posts('nopaging=1'))) {
+		if (is_array($posts = get_posts(array('numberposts' => '-1', 'post_status' => 'draft,pending,future,inherit,private,publish')))) {
 			foreach ($posts as $post) {	wp_delete_post($post->ID); }
 		}
 	}
@@ -26,10 +116,12 @@ class PostFixtures {
 		$posts = $data;
 		$categories = array();
 		foreach ($data as $post) {
+			$post = (array)$post;
 			if (isset($post['categories'])) {
 				$categories = array_merge($categories, $post['categories']);
 			}
 		}
+		$categories = array_unique($categories);
 		return compact('posts', 'categories');
 	}
 
@@ -37,7 +129,7 @@ class PostFixtures {
 		$category_ids_by_slug = array();
 		if (is_array($categories)) {
 			foreach ($categories as $category) {
-				$category_ids_by_slug[$category] = wp_insert_category(array('slug' => $category));
+				$category_ids_by_slug[$category] = wp_insert_category(array('cat_name' => $category, 'slug' => $category));
 			}
 		}
 		return $category_ids_by_slug;
@@ -47,6 +139,10 @@ class PostFixtures {
 		$post_ids_created = array();
 		if (is_array($posts)) {
 			foreach ($posts as $post) {
+				$post = (array)$post;
+				if (!isset($post['post_status'])) {
+					$post['post_status'] = 'publish';
+				}
 				$id = wp_insert_post($post);
 				if ($id != 0) {
 					$post_ids_created[] = $id;
@@ -74,8 +170,8 @@ class PostFixtures {
 	}
 
 	function create($data) {
-		$this->create_categories($data['categories']);
+		$categories_by_slug = $this->create_categories($data['categories']);
-		$this->create_posts($data['posts'], $data['categories']);
+		$this->create_posts($data['posts'], $categories_by_slug);
 	}
 
 	function remove() {

post-fixtures.php

@@ -28,6 +28,8 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 function __post_fixtures_plugins_loaded() {
 	if (version_compare(PHP_VERSION, '5.0.0') === 1) {
 		require_once('classes/PostFixtures.inc');
+		$post_fixtures = new PostFixtures();
+		$post_fixtures->init();
 	} else {
 		add_action('admin_notices', '__post_fixtures_admin_notices');
 	}

test/PostFixturesTest.php

@@ -42,7 +42,7 @@ class PostFixturesTest extends PHPUnit_Framework_TestCase {
 			update_post_meta($i, md5(rand()), md5(rand()));
 		}
 
-		_set_up_get_posts_response('nopaging=1', $posts);
+		_set_up_get_posts_response(array('numberposts' => '-1', 'post_status' => 'draft,pending,future,inherit,private,publish'), $posts);
 
 		$this->assertEquals(5, count($wp_test_expectations['posts']));
 		$this->assertEquals(5, count($wp_test_expectations['post_meta']));