Add mandatory Twitter credentials check to Collector

Signed-off-by: Andrew Phelps <andrew@phel.ps>

collect.php

@@ -7,6 +7,7 @@
 use OpenFuego\app\Universe as Universe;
 use OpenFuego\app\Collector as Collector;
 use OpenFuego\lib\Logger as Logger;
+use OpenFuego\lib\TwitterHandle as TwitterHandle;
 
 if (!defined('PHP_VERSION_ID') || PHP_VERSION_ID < 50300) {
 	die(__NAMESPACE__ . ' requires PHP 5.3.0 or higher.');
@@ -29,6 +30,15 @@
 	Logger::fatal(__NAMESPACE__ . " collector was terminated.");
 });
 
+$twitter = new TwitterHandle();
+$twitter->get("account/verify_credentials", array("include_entities" => 0, "skip_status" => 1));
+if ($twitter->http_code !== 200) {
+	$error_message = "Cannot continue. Your Twitter credentials appear to be invalid. Error code {$twitter->http_code}";
+	Logger::info($error_message);
+	die($error_message);
+}
+unset($twitter_handle);
+
 $authorities = unserialize(\OpenFuego\AUTHORITIES);
 
 $universe = new Universe();
@@ -46,7 +56,7 @@
 }
 
 $citizens = array_slice($citizens, 0, TWITTER_PREDICATE_LIMIT);
-	
+
 // Start streaming/collecting
 $collector = new Collector(TWITTER_OAUTH_TOKEN, TWITTER_OAUTH_SECRET);