<?php

// Include Tropo classes.

require('tropo.class.php');

// Include Limonade framework.

require('path/to/limonade/lib/limonade.php');

// The URL to the Google weather service. Renders as XML doc.

define("GOOGLE_WEATHER_URL", "http://www.google.com/ig/api?weather=%zip%&hl=en");

// A helper method to get weather details by zip code.

function getWeather($zip) {

$url = str_replace("%zip", $zip, GOOGLE_WEATHER_URL);

$weatherXML = simplexml_load_file($url);

$city = $weatherXML->weather->forecast_information->city["data"];

$current_conditions = $weatherXML->weather->current_conditions;

$current_weather = array(

"condition" => $current_conditions->condition["data"],

"temperature" => $current_conditions->temp_f["data"]." degrees",

"wind" => formatDirection($current_conditions->wind_condition["data"]),

"city" => $city

);

return $current_weather;

}

// A helper method to format directional abbreviations.

function formatDirection($wind) {

$abbreviated = array(" N ", " S ", " E ", " W ", " NE ", " SE ", " SW ", " NW ");

$full_name = array(" North ", " South ", " East ", " West ", " North East ", " South East ", " South West ", " North West ");

return str_replace($abbreviated, $full_name, str_replace("mph", "miles per hour", $wind));

}

// A helper method to format the Tropo object with weather details for a specific zip code.

function formatWeatherResponse(&$tropo, $zip) {

// Get weather information for the zip code the caller entered.

$weather_info = getWeather($zip);

$city = array_pop($weather_info);

// Begin telling the user the weather for the city their zip code is in.

$tropo->say("The current weather for $city is...");

// Iterate over an array of weather information.

foreach ($weather_info as $info) {

$tropo->say("$info.");

}

// Say thank you (never hurts to be polite) and end the session.

$tropo->say("Thank you for using Tropo!");

$tropo->hangup();

}

/**

* This is the starting point for the Tropo application.

* Get a 5 digit zip code from the user.

*/

dispatch_post('/start', 'zip_start');

function zip_start() {

// Create a new instance of the Session object, and get the channel information.

$session = new Session();

$from_info = $session->getFrom();

$channel = $from_info['channel'];

// Create a new instance of the Tropo object.

$tropo = new Tropo();

// See if any text was sent with session start.

$initial_text = $session->getInitialText();

// If the initial text is a zip code, skip the input collection and get weather information.

if(strlen($initial_text) == 5 && is_numeric($initial_text)) {

formatWeatherResponse($tropo, $initial_text);

}

else {

// Welcome prompt (for phone channel, and IM/SMS sessions with invalid initial text).

$tropo->say("Welcome to the Tropo PHP zip code example for $channel");

// Set up options form zip code input

$options = array("attempts" => 3, "bargein" => true, "choices" => "[5 DIGITS]", "name" => "zip", "timeout" => 5);

// Ask the user for input, pass in options.

$tropo->ask("Please enter your 5 digit zip code.", $options);

// Tell Tropo what to do when the user has entered input, or if there is an error.

$tropo->on(array("event" => "continue", "next" => "get_zip_code.php?uri=end", "say" => "Please hold."));

$tropo->on(array("event" => "error", "next" => "get_zip_code.php?uri=error", "say" => "An error has occured."));

}

// Render the JSON for the Tropo WebAPI to consume.

return $tropo->RenderJson();

}

/**

* After a zip code has been entered, use it to look up weather details for that city.

*/

dispatch_post('/end', 'zip_end');

function zip_end() {

// Create a new instance of the result object and get the value of the user input.

$result = new Result();

$zip = $result->getValue();

// Create a new instance of the Tropo object.

$tropo = new Tropo();

// Get the weather information for the entered zip code.

formatWeatherResponse($tropo, $zip);

// Render the JSON for the Tropo WebAPI to consume.

return $tropo->RenderJson();

}

/**

* If an error occurs, end the session.

*/

dispatch_post('/error', 'zip_error');

function zip_error() {

// Step 1. Create a new instance of the Tropo object.

$tropo = new Tropo();

// Step 2. This is the last thing the user will be told before the session ends.

$tropo->say("Please try your request again later.");

// Step 3. End the session.

$tropo->hangup();

// Step 4. Render the JSON for the Tropo WebAPI to consume.

return $tropo->renderJSON();

}

// Run this sucker!

run();

?>