/bitly.php

<?php
/**
 * @file
 * Simple PHP library for interacting with the v3 bit.ly api (only deals with
 * JSON format, but supports new OAuth endpoints).
 * REQUIREMENTS: PHP, Curl, JSON
 * 
 * @link https://github.com/Falicon/BitlyPHP
 * @author Kevin Marshall <info@falicon.com>
 * @author Robin Monks <devlinks@gmail.com>
 */

/**
 * The bitlyKey assigned to your bit.ly account. (http://bit.ly/a/account)
 */
define('bitlyKey', 'YOUR_BITLY_ASSIGNED_KEY');

/**
 * The bitlyLogin assigned to your bit.ly account. (http://bit.ly/a/account)
 */
define('bitlyLogin' , 'YOUR_BITLY_LOGIN');

/**
 * The client_id assigned to your OAuth app. (http://bit.ly/a/account)
 */
define('bitly_clientid' , 'YOUR_BITLY_ASSIGNED_CLIENT_ID_FOR_OAUTH');

/**
 * The client_secret assigned to your OAuth app. (http://bit.ly/a/account)
 */
define('bitly_secret' , 'YOUR_BITLY_ASSIGNED_CLIENT_SECRET_FOR_OAUTH');


/**
 * The URI of the standard bitly v3 API.
 */
define('bitly_api', 'http://api.bit.ly/v3/');

/**
 * The URI of the bitly OAuth endpoints.
 */
define('bitly_oauth_api', 'https://api-ssl.bit.ly/v3/');

/**
 * The URI for OAuth access token requests.
 */
define('bitly_oauth_access_token', 'https://api-ssl.bit.ly/oauth/');

/**
 * Given a longUrl, get the bit.ly shortened version.
 *
 * Example usage:
 * @code
 *   $results = bitly_v3_shorten('http://knowabout.it', 'j.mp');
 * @endcode
 *
 * @param $longUrl
 *   Long URL to be shortened.
 * @param $domain
 *   Uses bit.ly (default), j.mp, or a bit.ly pro domain.
 * @param $x_login
 *   User's login name.
 * @param $x_api_key
 *   User's API key.
 *
 * @return
 *   An associative array containing:
 *   - url: The unique shortened link that should be used, this is a unique
 *     value for the given bit.ly account.
 *   - hash: A bit.ly identifier for long_url which is unique to the given
 *     account.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - long_url: An echo back of the longUrl request parameter.
 *   - new_hash: Will be set to 1 if this is the first time this long_url was
 *     shortened by this user. It will also then be added to the user history.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/shorten
 */
function bitly_v3_shorten($longUrl, $domain = '', $x_login = '', $x_apiKey = '') {
  $result = array();
  $url = bitly_api . "shorten?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&longUrl=" . urlencode($longUrl);
  if ($domain != '') {
    $url .= "&domain=" . $domain;
  }
  if ($x_login != '' && $x_apiKey != '') {
    $url .= "&x_login=" . $x_login . "&x_apiKey=" . $x_apiKey;
  }
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'hash'})) {
    $result['url'] = $output->{'data'}->{'url'};
    $result['hash'] = $output->{'data'}->{'hash'};
    $result['global_hash'] = $output->{'data'}->{'global_hash'};
    $result['long_url'] = $output->{'data'}->{'long_url'};
    $result['new_hash'] = $output->{'data'}->{'new_hash'};
  }
  return $result;
}

/**
 * Expand a bit.ly url or hash.
 *
 * @param $data
 *   Either a full bit.ly short url or a bit.ly hash to be expanded.
 *
 * @return
 *   An associative array containing:
 *   - hash: A bit.ly identifier for long_url which is unique to the given
 *     account.
 *   - long_url: The URL that the requested short_url or hash points to.
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/expand
 */
function bitly_v3_expand($data) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      $tmp = explode('/', $rec);
      $tmp = array_reverse($tmp);
      array_push($recs, $tmp[0]);
    }
    $data = implode('&hash=', $recs);
  } else {
    $tmp = explode('/', $data);
    $tmp = array_reverse($tmp);
    $data = $tmp[0];
  }
  // make the call to expand
  $url = bitly_api . "expand?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'expand'})) {
    foreach ($output->{'data'}->{'expand'} as $tmp) {
      $rec = array();
      $rec['hash'] = $tmp->{'hash'};
      $rec['long_url'] = $tmp->{'long_url'};
      $rec['user_hash'] = $tmp->{'user_hash'};
      $rec['global_hash'] = $tmp->{'global_hash'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * Validate that a bit.ly login/apiKey combination is valid.
 *
 * @param $x_login
 *   The end users user's bit.ly login (for validation).
 * @param $x_apiKey
 *   The end users bit.ly apiKey (for validation).
 *
 * @return
 *   TRUE if the combination is valid.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/validate
 */
function bitly_v3_validate($x_login, $x_apiKey) {
  $result = 0;
  $url = bitly_api . "validate?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&x_login=" . $x_login . "&x_apiKey=" . $x_apiKey;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'valid'})) {
    $result = $output->{'data'}->{'valid'};
  }
  return (bool) $result;
}

/**
 * For one or more bit.ly URL's or hashes, returns statistics about the clicks
 * on that link.
 *
 * @param $data
 *   Can be a bit.ly shortened URL, a bit.ly hash, or an array of bit.ly URLs
 *   and/or hashes.
 *
 * @return
 *   A multidimensional numbered associative array containing:
 *   - short_url: The unique bit.ly hash.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - user_clicks: The total count of clicks to this user's bit.ly link.
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - global_clicks: The total count of clicks to all bit.ly links that point
 *     to the same same long url.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/clicks
 */
function bitly_v3_clicks($data) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      $tmp = explode('/', $rec);
      $tmp = array_reverse($tmp);
      array_push($recs, $tmp[0]);
    }
    $data = implode('&hash=', $recs);
  } else {
    $tmp = explode('/', $data);
    $tmp = array_reverse($tmp);
    $data = $tmp[0];
  }
  $url = bitly_api . "clicks?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'clicks'})) {
    foreach ($output->{'data'}->{'clicks'} as $tmp) {
      $rec = array();
      $rec['short_url'] = $tmp->{'short_url'};
      $rec['global_hash'] = $tmp->{'global_hash'};
      $rec['user_clicks'] = $tmp->{'user_clicks'};
      $rec['user_hash'] = $tmp->{'user_hash'};
      $rec['global_clicks'] = $tmp->{'global_clicks'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * Provides a list of referring sites for a specified bit.ly short link or hash,
 * and the number of clicks per referrer.
 *
 * @param $data
 *   A bit.ly shortened URL or bit.ly hash.
 *
 * @return
 *   An associative array containing:
 *   - created_by: The service that created the link.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - short_url: The unique bit.ly hash.
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - referrers: A multidimensional numbered associative array containing:
 *     - clicks: Number of clicks from this referrer.
 *     - referrer: (optional) Referring site.
 *     - referrer_app: (optional) Referring application (e.g.: Tweetdeck).
 *     - url: (optional) URL of referring application
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/referrers
 */
function bitly_v3_referrers($data) {
  $results = array();
  $tmp = explode('/', $data);
  $tmp = array_reverse($tmp);
  $data = $tmp[0];
  $url = bitly_api . "referrers?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'referrers'})) {
    $results['created_by'] = $output->{'data'}->{'created_by'};
    $results['global_hash'] = $output->{'data'}->{'global_hash'};
    $results['short_url'] = $output->{'data'}->{'short_url'};
    $results['user_hash'] = $output->{'data'}->{'user_hash'};
    $results['referrers'] = array();
    foreach ($output->{'data'}->{'referrers'} as $tmp) {
      $rec = array();
      $rec['clicks'] = $tmp->{'clicks'};
      $rec['referrer'] = $tmp->{'referrer'};
      $rec['referrer_app'] = $tmp->{'referrer_app'};
      $rec['url'] = $tmp->{'url'};
      array_push($results['referrers'], $rec);
    }
  }
  return $results;
}

/**
 * Provides a list of countries from which clicks on a specified bit.ly short
 * link or hash have originated, and the number of clicks per country.
 *
 * @param $data
 *   A bit.ly shortened URL or bit.ly hash.
 *
 * @return
 *   An associative array containing:
 *   - created_by: The service that created the link.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - short_url: The unique bit.ly hash.
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - countries: A multidimensional numbered associative array containing:
 *     - clicks: Number of clicks from this country.
 *     - country: The country code these clicks originated from or null when
 *       displaying clicks that could not be mapped to a specific country.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/countries
 */
function bitly_v3_countries($data) {
  $results = array();
  $tmp = explode('/', $data);
  $tmp = array_reverse($tmp);
  $data = $tmp[0];
  $url = bitly_api . "countries?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'countries'})) {
    $results['created_by'] = $output->{'data'}->{'created_by'};
    $results['global_hash'] = $output->{'data'}->{'global_hash'};
    $results['short_url'] = $output->{'data'}->{'short_url'};
    $results['user_hash'] = $output->{'data'}->{'user_hash'};
    $results['countries'] = array();
    foreach ($output->{'data'}->{'countries'} as $tmp) {
      $rec = array();
      $rec['clicks'] = $tmp->{'clicks'};
      $rec['country'] = $tmp->{'country'};
      array_push($results['countries'], $rec);
    }
  }
  return $results;
}

/**
 * For one or more bit.ly short urls or hashes, provides time series clicks per
 * minute for the last hour in reverse chronological order (most recent to least
 * recent).
 *
 * @param $data
 *   Can be a bit.ly shortened URL, a bit.ly hash, or an array of bit.ly URLs
 *   and/or hashes.
 *
 * @return
 *   A multidimensional numbered associative array containing:
 *   - clicks: An array with sixty entires, each for the number of clicks
 *     received for the given link that minute.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - short_url: The unique bit.ly hash.
 *   - user_hash: The corresponding bit.ly user identifier.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/clicks_by_minute
 */
function bitly_v3_clicks_by_minute($data) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      $tmp = explode('/', $rec);
      $tmp = array_reverse($tmp);
      array_push($recs, $tmp[0]);
    }
    $data = implode('&hash=', $recs);
  } else {
    $tmp = explode('/', $data);
    $tmp = array_reverse($tmp);
    $data = $tmp[0];
  }
  $url = bitly_api . "clicks_by_minute?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'clicks_by_minute'})) {
    foreach ($output->{'data'}->{'clicks_by_minute'} as $tmp) {
      $rec = array();
      $rec['clicks'] = $tmp->{'clicks'};
      $rec['global_hash'] = $tmp->{'global_hash'};
      $rec['short_url'] = $tmp->{'short_url'};
      $rec['user_hash'] = $tmp->{'user_hash'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * For one or more bit.ly short urls or hashes, provides time series clicks per
 * day for the last 30 days in reverse chronological order (most recent to least
 * recent).
 *
 * @param $data
 *   Can be a bit.ly shortened URL, a bit.ly hash, or an array of bit.ly URLs
 *   and/or hashes.
 *
 * @return
 *   A multidimensional numbered associative array containing:
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - short_url: The unique bit.ly hash.
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - clicks: A multidimensional numbered associative array containing:
 *     - clicks: The number of clicks received for a given link that day.
 *     - day_start: A time code representing the start of the day for which
 *       click data is provided.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/clicks_by_day
 */
function bitly_v3_clicks_by_day($data, $days = 7) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      $tmp = explode('/', $rec);
      $tmp = array_reverse($tmp);
      array_push($recs, $tmp[0]);
    }
    $data = implode('&hash=', $recs);
  } else {
    $tmp = explode('/', $data);
    $tmp = array_reverse($tmp);
    $data = $tmp[0];
  }
  $url = bitly_api . "clicks_by_day?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&days=" . $days . "&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'clicks_by_day'})) {
    foreach ($output->{'data'}->{'clicks_by_day'} as $tmp) {
      $rec = array();
      $rec['global_hash'] = $tmp->{'global_hash'};
      $rec['short_url'] = $tmp->{'short_url'};
      $rec['user_hash'] = $tmp->{'user_hash'};
      $rec['clicks'] = array();
      $clicks = $tmp->{'clicks'};
      foreach ($clicks as $click) {
        $clickrec = array();
        $clickrec['clicks'] = $click->{'clicks'};
        $clickrec['day_start'] = $click->{'day_start'};
        array_push($rec['clicks'], $clickrec);
      }
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * This is used to query whether a given short domain is assigned for bitly.Pro,
 * and is consequently a valid shortUrl parameter for other API calls.
 *
 * @param $domain
 *   The short domain to check.
 *
 * @return
 *   An associative array containing:
 *   - domain: An echo back of the request parameter.
 *   - bitly_pro_domain: 0 or 1 designating whether this is a current bitly.Pro
 *     domain.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/bitly_pro_domain
 */
function bitly_v3_bitly_pro_domain($domain) {
  $result = array();
  $url = bitly_api . "bitly_pro_domain?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&domain=" . $domain;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'bitly_pro_domain'})) {
    $result['domain'] = $output->{'data'}->{'domain'};
    $result['bitly_pro_domain'] = $output->{'data'}->{'bitly_pro_domain'};
  }
  return $result;
}

/**
 * This is used to query for a bit.ly link based on a long URL.
 *
 * @param $data
 *   One or more long URLs to lookup.
 *
 * @return
 *   An associative array containing:
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - short_url: The unique shortened link that should be used, this is a
 *     unique value for the given bit.ly account.
 *   - url: An echo back of the url parameter.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/lookup
 */
function bitly_v3_lookup($data) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      array_push($recs, urlencode($rec));
    }
    $data = implode('&url=', $recs);
  } else {
    $data = urlencode($data);
  }
  $url = bitly_api . "lookup?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&url=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'lookup'})) {
    foreach ($output->{'data'}->{'lookup'} as $tmp) {
      $rec = array();
      $rec['global_hash'] = $tmp->{'global_hash'};
      $rec['short_url'] = $tmp->{'short_url'};
      $rec['url'] = $tmp->{'url'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * This is used by applications to lookup a bit.ly API key for a user given a
 * bit.ly username and password.
 *
 * @param $x_login
 *   Bit.ly username.
 * @param $x_password
 *   Bit.ly password.
 *
 * @return
 *   An associative array containing:
 *   - successful: An indicator of weather or not the login and password
 *     combination is valid.
 *   - username: The corresponding bit.ly users username.
 *   - api_key: The corresponding bit.ly users API key.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/authenticate
 */
function bitly_v3_authenticate($x_login, $x_password) {
  $result = array();
  $url = bitly_api . "authenticate";
  $params = array();
  $params['login'] = bitlyLogin;
  $params['apiKey'] = bitlyKey;
  $params['format'] = "json";
  $params['x_login'] = $x_login;
  $params['x_password'] = $x_password;
  $output = json_decode(bitly_post_curl($url, $params));
  if (isset($output->{'data'}->{'authenticate'})) {
    $result['successful'] = $output->{'data'}->{'authenticate'}->{'successful'};
    $result['username'] = $output->{'data'}->{'authenticate'}->{'username'};
    $result['api_key'] = $output->{'data'}->{'authenticate'}->{'api_key'};
  }
  return $result;
}

/**
 * This is used to return the page title for a given bit.ly link.
 *
 * @param $data
 *   Can be a bit.ly shortened URL, a bit.ly hash, or an array of bit.ly URLs
 *   and/or hashes.
 *
 * @return
 *   A multidimensional numbered associative array containing:
 *   - created_by: The service that created the link.
 *   - global_hash: A bit.ly identifier for long_url which can be used to track
 *     aggregate stats across all matching bit.ly links.
 *   - hash: The unique bit.ly hash.
 *   - title: The HTML page title for the destination page (when available).
 *   - user_hash: The corresponding bit.ly user identifier.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/info
 */
function bitly_v3_info($data) {
  $results = array();
  if (is_array($data)) {
    // we need to flatten this into one proper command
    $recs = array();
    foreach ($data as $rec) {
      $tmp = explode('/', $rec);
      $tmp = array_reverse($tmp);
      array_push($recs, $tmp[0]);
    }
    $data = implode('&hash=', $recs);
  } else {
    $tmp = explode('/', $data);
    $tmp = array_reverse($tmp);
    $data = $tmp[0];
  }
  // make the call to expand
  $url = bitly_api . "info?login=" . bitlyLogin . "&apiKey=" . bitlyKey . "&format=json&hash=" . $data;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'info'})) {
    foreach ($output->{'data'}->{'info'} as $tmp) {
      $rec = array();
      $rec['created_by'] = $tmp->{'created_by'};
      $rec['global_hash'] = $tmp->{'global_hash'};
      $rec['hash'] = $tmp->{'hash'};
      $rec['title'] = $tmp->{'title'};
      $rec['user_hash'] = $tmp->{'user_hash'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * Returns an OAuth access token as well as API users for a given code.
 *
 * @param $code
 *   The OAuth verification code acquired via OAuth’s web authentication
 *   protocol.
 * @param $redirect
 *   The page to which a user was redirected upon successfully authenticating.
 *
 * @return
 *   An associative array containing:
 *   - login: The corresponding bit.ly users username.
 *   - api_key: The corresponding bit.ly users API key.
 *   - access_token: The OAuth access token for specified user.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/oauth/access_token
 */
function bitly_oauth_access_token($code, $redirect) {
  $results = array();
  $url = bitly_oauth_access_token . "access_token";
  $params = array();
  $params['client_id'] = bitly_clientid;
  $params['client_secret'] = bitly_secret;
  $params['code'] = $code;
  $params['redirect_uri'] = $redirect;
  $output = bitly_post_curl($url, $params);
  $parts = explode('&', $output);
  foreach ($parts as $part) {
    $bits = explode('=', $part);
    $results[$bits[0]] = $bits[1];
  }
  return $results;
}

/**
 * Provides the total clicks per day on a user’s bit.ly links.
 *
 * @param $access_token
 *   The OAuth access token for the user.
 * @param $days
 *   An integer value for the number of days (counting backwards from the
 *   current day) from which to retrieve data (min:1, max:30, default:7).
 *
 * @return
 *   An associative array containing:
 *   - days: An echo of the dupplied days parameter.
 *   - total_clicks: The total number of clicks over the supplied period.
 *   - clicks: A multidimensional numbered associative array containing:
 *     - clicks: The number of clicks received for a given link that day.
 *     - day_start: A time code representing the start of the day for which
 *       click data is provided.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/user/clicks
 */
function bitly_v3_user_clicks($access_token, $days = 7) {
  // $results = bitly_v3_user_clicks('BITLY_SUPPLIED_ACCESS_TOKEN');
  $results = array();
  $url = bitly_oauth_api . "user/clicks?access_token=" . $access_token . "&days=" . $days;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'clicks'})) {
    $results['days'] = $output->{'data'}->{'days'};
    $results['total_clicks'] = $output->{'data'}->{'total_clicks'};
    $results['clicks'] = array();
    foreach ($output->{'data'}->{'clicks'} as $clicks) {
      $rec = array();
      $rec['clicks'] = $clicks->{'clicks'};
      $rec['day_start'] = $clicks->{'day_start'};
      array_push($results['clicks'], $rec);
    }
  }
  return $results;
}

/**
 * Provides a list of referring sites for a specified bit.ly user, and the
 * number of clicks per referrer.
 *
 * @param $access_token
 *   The OAuth access token for the user.
 * @param $days
 *   An integer value for the number of days (counting backwards from the
 *   current day) from which to retrieve data (min:1, max:30, default:7).
 *
 * @return
 *   An associative array containing:
 *   - days: An echo of the dupplied days parameter.
 *   - referrers: A multidimensional numbered associative array containing:
 *     - clicks: Number of clicks from this referrer.
 *     - referrer: (optional) Referring site.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/user/referrers
 */
function bitly_v3_user_referrers($access_token, $days = 7) {
  // $results = bitly_v3_user_referrers('BITLY_SUPPLIED_ACCESS_TOKEN');
  $results = array();
  $url = bitly_oauth_api . "user/referrers?access_token=" . $access_token . "&days=" . $days;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'referrers'})) {
    $results['days'] = $output->{'data'}->{'days'};
    $results['referrers'] = array();
    foreach ($output->{'data'}->{'referrers'} as $referrers) {
      $recs = array();
      foreach ($referrers as $ref) {
        $rec = array();
        $rec['referrer'] = $ref->{'referrer'};
        $rec['clicks'] = $ref->{'clicks'};
        array_push($recs, $rec);
      }
      array_push($results['referrers'], $recs);
    }
  }
  return $results;
}

/**
 * Provides a list of referring sites for a specified bit.ly short link or hash,
 * and the number of clicks per referrer.
 *
 * @param $access_token
 *   The OAuth access token for the user.
 * @param $days
 *   An integer value for the number of days (counting backwards from the
 *   current day) from which to retrieve data (min:1, max:30, default:7).
 *
 * @return
 *   An associative array containing:
 *   - days: An echo of the dupplied days parameter.
 *   - referrers: A multidimensional numbered associative array containing:
 *     - clicks: Number of clicks from this referrer.
 *     - countries: (optional) Country code for where the clicks originated.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/user/countries
 */
function bitly_v3_user_countries($access_token, $days = 7) {
  // $results = bitly_v3_user_countries('BITLY_SUPPLIED_ACCESS_TOKEN');
  $results = array();
  $url = bitly_oauth_api . "user/countries?access_token=" . $access_token . "&days=" . $days;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'countries'})) {
    $results['days'] = $output->{'data'}->{'days'};
    $results['countries'] = array();
    foreach ($output->{'data'}->{'countries'} as $countries) {
      $recs = array();
      foreach ($countries as $country) {
        $rec = array();
        $rec['country'] = $country->{'country'};
        $rec['clicks'] = $country->{'clicks'};
        array_push($recs, $rec);
      }
      array_push($results['countries'], $recs);
    }
  }
  return $results;
}

/**
 * Provides a given user’s 100 most popular links based on click traffic in the
 * past hour, and the number of clicks per link.
 *
 * @param $access_token
 *   The OAuth access token for the user.
 *
 * @return
 *   A multidimensional numbered associative array containing:
 *   - user_hash: The corresponding bit.ly user identifier.
 *   - clicks: Number of clicks on this link.
 *
 * @see http://code.google.com/p/bitly-api/wiki/ApiDocumentation#/v3/user/realtime_links
 */
function bitly_v3_user_realtime_links($access_token) {
  // $results = bitly_v3_user_realtime_links('BITLY_SUPPLIED_ACCESS_TOKEN');
  $results = array();
  $url = bitly_oauth_api . "user/realtime_links?format=json&access_token=" . $access_token;
  $output = json_decode(bitly_get_curl($url));
  if (isset($output->{'data'}->{'realtime_links'})) {
    foreach ($output->{'data'}->{'realtime_links'} as $realtime_links) {
      $rec = array();
      $rec['clicks'] = $realtime_links->{'clicks'};
      $rec['user_hash'] = $realtime_links->{'user_hash'};
      array_push($results, $rec);
    }
  }
  return $results;
}

/**
 * Make a GET call to the bit.ly API.
 *
 * @param $uri
 *   URI to call.
 */
function bitly_get_curl($uri) {
  $output = "";
  try {
    $ch = curl_init($uri);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_TIMEOUT, 4);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    $output = curl_exec($ch);
  } catch (Exception $e) {
  }
  return $output;
}

/**
 * Make a POST call to the bit.ly API.
 *
 * @param $uri
 *   URI to call.
 * @param $fields
 *   Array of fields to send.
 */
function bitly_post_curl($uri, $fields) {
  $output = "";
  $fields_string = "";
  foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
  rtrim($fields_string,'&');
  try {
    $ch = curl_init($uri);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch,CURLOPT_POST,count($fields));
    curl_setopt($ch,CURLOPT_POSTFIELDS,$fields_string);
    curl_setopt($ch, CURLOPT_TIMEOUT, 2);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    $output = curl_exec($ch);
  } catch (Exception $e) {
  }
  return $output;
}

?>