/**
* For each PMP post in the WP database, fetch the corresponding Doc from PMP and check if
* the WP post differs from the PMP Doc. If it does differ, update the post in the WP database.
*
* @since 0.1
*/
function pmp_get_updates()
{
pmp_debug('========== pmp_get_updates ==========');
$posts = pmp_get_pmp_posts();
foreach ($posts as $post) {
$syncer = PmpPost::fromPost($post);
$syncer->pull();
}
}
/**
* lookup pmp document from a post
*/
function test_from_post()
{
$syncer = PmpPost::fromPost($this->wp_post);
$this->assertNotNull($syncer->doc);
$this->assertNotNull($syncer->post);
$this->assertEquals($this->pmp_story->attributes->guid, $syncer->doc->attributes->guid);
// post isn't in the pmp yet
update_post_meta($this->wp_post->ID, 'pmp_guid', null);
$syncer = PmpPost::fromPost($this->wp_post);
$this->assertNull($syncer->doc);
// lost access (403 forbidden) to this pmp document
update_post_meta($this->wp_post->ID, 'pmp_guid', 'some-guid-i-cannot-see');
$syncer = PmpPost::fromPost($this->wp_post);
$this->assertNull($syncer->doc);
}
/**
* delete a post, when you lose access upstream
*/
function test_pull_delete()
{
$syncer = new PmpPost($this->pmp_story, $this->wp_post);
$this->assertTrue($syncer->pull(true));
$this->assertCount(2, $syncer->attachment_syncers);
// make sure these posts all get cleaned up
$id = $this->wp_post->ID;
$attach_id1 = $syncer->attachment_syncers[0]->post->ID;
$attach_id2 = $syncer->attachment_syncers[1]->post->ID;
// make it look like the top-level doc disappeared
update_post_meta($id, 'pmp_guid', 'foobar');
$syncer = PmpPost::fromPost($this->wp_post);
$this->assertTrue($syncer->pull(true));
$this->assertNull($syncer->post);
$this->assertCount(2, $syncer->attachment_syncers);
$this->assertNull(get_post($id));
$this->assertNull(get_post($attach_id1));
$this->assertNull(get_post($attach_id2));
}
/**
* When the PMP notification hub sends an update, handle it
*
* @since 0.3
*/
function pmp_do_notification_callback()
{
global $wpdb;
pmp_debug('========== pmp_do_notification_callback ==========');
$body = file_get_contents('php://input');
$hash = hash_hmac('sha1', $body, PMP_NOTIFICATIONS_SECRET);
// get a COMPLETE mapping of known-PMP-guids to top-level WP-posts
$pmp_post_data = $wpdb->get_results("select post_id, meta_value, post_parent " . "from {$wpdb->posts} join {$wpdb->postmeta} on (ID = post_id) " . "where meta_key = 'pmp_guid'", ARRAY_A);
// map to the TOP LEVEL post (attachments map to their parent)
$pmp_guids = array();
foreach ($pmp_post_data as $row) {
if ($row['post_parent'] > 0) {
$pmp_guids[$row['meta_value']] = $row['post_parent'];
} else {
$pmp_guids[$row['meta_value']] = $row['post_id'];
}
}
// check hub signature
if ($_SERVER['HTTP_X_HUB_SIGNATURE'] !== "sha1={$hash}") {
var_log('INVALID PMP notifications HTTP_X_HUB_SIGNATURE');
var_log(" Expected: sha1={$hash}");
var_log(" Got: " . $_SERVER['HTTP_X_HUB_SIGNATURE']);
return;
}
// parse xml pubsubhubbub body
$xml = simplexml_load_string($body);
foreach ($xml->channel->item as $item) {
$item_json = json_decode(json_encode($item));
$item_guid = $item_json->guid;
// look for Posts tied to that guid
if (isset($pmp_guids[$item_guid])) {
$post = get_post($pmp_guids[$item_guid]);
if ($post) {
$syncer = PmpPost::fromPost($post);
$syncer->pull();
}
}
}
}
/**
* Handle pushing post content to PMP. Works with posts and attachments (images).
*
* @since 0.2
*/
function pmp_handle_push($post_id)
{
$post = get_post($post_id);
$syncer = PmpPost::fromPost($post);
if ($syncer->push()) {
return $syncer->doc->attributes->guid;
} else {
return null;
}
}
