<?PHP
# twitterapi.php
# by www.brianmoreau.com
# YOUR TWITTER APP KEYS
$conskey = "YOUR_KEY";
$conssec = "YOUR_SEC";
# USER ACCESS KEYS: The access keys for yoru twitter profile
$userToken = "TOKEN";
$userSecret = "SECRET";

$error = "";

# GET SENT DATA
$key = $_GET[k];
# COMMAND TWEET, SEARCH
$command = $_GET[c];
# VARS
$var = $_GET[v];


# CHECK ACCESS KEY
# MODIFY THSI TO MATCH TEH KEY IN YOUR ADRUINO PROGRAM
if ($key != "123456") {
	echo ("INVALID KEY");
	exit();
}

# CHECK COMMAND
if ($command == "TWEET") {
	# TWEET
	$t = $var . " " . time();
	# TWITTER TWEET API URL
	$status_url = 'https://api.twitter.com/1.1/statuses/update.json';
	# TRY TO SEND TWEET
	try {
		$oauth = new OAuth($conskey,$conssec,OAUTH_SIG_METHOD_HMACSHA1,OAUTH_AUTH_TYPE_FORM); # use this to tweet
		$oauth->setToken($userToken,$userSecret);
		$args = array('status'=>$t); 
		$oauth->fetch("$status_url",$args,"POST"); // WORKING
		$json = json_decode($oauth->getLastResponse(),true);
		$error = "SENT";
	} catch(OAuthException $E) {
		// get error
		// message is protected
		$error = $E->getMessage();
	}
	# output back to arduino
	echo ($command . " " . $t . " " . $error);
# CHECK COMMAND
} else if ($command == "TWEETSEARCH") {
	# SEARCH
	# search API URL
	$search_url = 'https://api.twitter.com/1.1/search/tweets.json';
	try {
	# connect to api
	# https://dev.twitter.com/docs/api/1.1/get/search/tweets
	$oauth = new OAuth($conskey,$conssec,OAUTH_SIG_METHOD_HMACSHA1,OAUTH_AUTH_TYPE_URI); # for search
	$oauth->setToken($userToken,$userSecret);
	$q = urlencode($var); // serach query
	$c = urlencode(1); // number of results
	$lang = urlencode("en"); // set language
	# build search query
	$args = array('q'=>$q,
			  'count'=>$c,
			  'lang'=>$lang,
			  'result_type'=>'recent'); 
	# gets last tweet, arduino decides if it is new or not
	$oauth->fetch("$search_url",$args,"GET"); 
	$json = json_decode($oauth->getLastResponse(),true);
	// print_r($json);
	// decode result
	foreach($json['statuses'] as $tweet) {
		$id = $tweet['id'];
    	$text = $tweet['text'];
		# send data lables so arduino can reconise data
		# becasue arduino receives an HTTP headder i.e HTTP 200 OK
		echo ("tid=" . $id . "," .  $text);
	}
	} catch(OAuthException $E) {
		$error = $E->getMessage();
	}
# COMMAND NOT FOUND
} else {
	echo ("INVALID COMMAND");
	exit();
}
?>