<?php
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function push_error(&$app, $msg) {
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$app->response()->status(400);
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echo $msg . "\n";
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die();
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}
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$app->post('/', function() use($app) {
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$params = $app->request()->params();
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switch(k($params, 'hub_mode')) {
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case 'subscribe':
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// Sanity check the request params
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$topic = k($params, 'hub_topic');
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$callback = k($params, 'hub_callback');
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if(!is_valid_push_url($topic)) {
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push_error($app, 'Topic URL was invalid');
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}
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if(!is_valid_push_url($callback)) {
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push_error($app, 'Callback URL was invalid');
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}
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// Make a HEAD request to the topic URL to check if it exists
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$topic_head = request\get_head($topic);
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if($topic_head) {
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if(request\response_is($topic_head['status'], 2)) {
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$app->response()->status(202);
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// Find or create the feed given the topic URL
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$feed = db\find_or_create('feeds', ['feed_url'=>$topic], [
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'hash' => db\random_hash(),
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], true);
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print_r($feed);
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// Find or create the subscription for this callback URL and feed
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$subscription = db\find_or_create('subscriptions', ['feed_id'=>$feed->id, 'callback_url'=>$callback], [
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'hash' => db\random_hash(),
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]);
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$subscription->date_requested = db\now();
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$subscription->challenge = db\random_hash();
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$subscription->save();
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echo "The subscription request is being validated. Check the status here:\n";
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echo Config::$base_url . '/subscription/' . $subscription->hash . "\n";
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} else {
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$app->response()->status(400);
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echo "The topic URL returned a " . $topic_head['status'] . " status code\n";
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}
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} else {
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push_error($app, 'There was a problem trying to verify the topic URL');
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}
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break;
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case 'unsubscribe':
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break;
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}
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});
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