Adding multi-API support

This will allow users to change the API url, added coinchose as an
example as pointed out by @vias79 .

* tools class detects the API type
* getPrice returns the price based on API URL parsed

Fixes #236

cronjobs/tickerupdate.php

@@ -26,11 +26,13 @@ require_once('shared.inc.php');
 require_once(CLASS_DIR . '/tools.class.php');
 
 verbose("Running updates\n");
-if ($aData = $tools->getApi($config['price']['url'], $config['price']['target'])) {
-  if (!$setting->setValue('price', $aData['ticker']['last']))
-    verbose("ERR Table update failed");
+verbose("  Price API Call ... ");
+if ($price = $tools->getPrice()) {
+  verbose("found $price as price\n");
+  if (!$setting->setValue('price', $price))
+    verbose("unable to update value in settings table\n");
 } else {
-  verbose("ERR Failed download JSON data from " . $config['price']['url'].$config['price']['target'] . "\n");
+  verbose("failed to fetch API data: " . $tools->getError() . "\n");
 }
 
 ?>

public/include/classes/tools.class.php

@@ -9,11 +9,7 @@ if (!defined('SECURITY'))
  * Implements some common cron tasks outside
  * the scope of our web application
  **/
-class Tools {
-  public function __construct($debug) {
-    $this->debug = $debug;
-  }
-
+class Tools extends Base {
   /**
    * Fetch JSON data from an API
    * @param url string API URL
@@ -21,13 +17,13 @@ class Tools {
    * @param auth array Optional authentication data to be sent with
    * @return dec array JSON decoded PHP array
    **/
-  public function getApi($url, $target, $auth=NULL) {
+  private function getApi($url, $target, $auth=NULL) {
     static $ch = null;
     static $ch = null;
     if (is_null($ch)) {
       $ch = curl_init();
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-      curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; BTCE PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
+      curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
     }
     curl_setopt($ch, CURLOPT_URL, $url . $target);
     // curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
@@ -41,6 +37,49 @@ class Tools {
     if (!$dec) throw new Exception('Invalid data received, please make sure connection is working and requested API exists');
     return $dec;
   }
+
+  /**
+   * Detect the API to properly extract information
+   * @param url string API URL
+   * @return data string API type
+   **/
+  private function getApiType($url) {
+    if (preg_match('/coinchoose.com/', $url)) {
+      return 'coinchose';
+    } else if (preg_match('/btc-e.com/', $url)) {
+      return 'btce';
+    }
+    $this->setErrorMessage("API URL unknown");
+    return false;
+  }
+
+  /**
+   * Extract price information from API data
+   **/
+  public function getPrice() {
+    $aData = $this->getApi($this->config['price']['url'], $this->config['price']['target']);
+    $strCurrency = $this->config['currency'];
+    // Check the API type for configured URL
+    if (!$strApiType = $this->getApiType($this->config['price']['url']))
+      return false;
+    // Extract price depending on API type
+    switch ($strApiType) {
+    case 'coinchose':
+      foreach ($aData as $aItem) {
+        if($strCurrency == $aItem[0])
+          return $aItem['price'];
+      }
+      break;
+    case 'btce':
+      return $aData['ticker']['last'];
+      break;
+    }
+    // Catchall, we have no data extractor for this API url
+    $this->setErrorMessage("Undefined API to getPrice() on URL " . $this->config['price']['url']);
+    return false;
+  }
 }
 
-$tools = new Tools($debug);
+$tools = new Tools();
+$tools->setDebug($debug);
+$tools->setConfig($config);

public/include/config/global.inc.dist.php

@@ -1,7 +1,6 @@
 <?php
 // Make sure we are called from index.php
-if (!defined('SECURITY'))
-  die('Hacking attempt');
+if (!defined('SECURITY')) die('Hacking attempt');
 
 // What is our overall theme
 define('THEME', 'mmcFE');
@@ -18,6 +17,7 @@ define('PAGES_DIR', INCLUDE_DIR . '/pages');
 // Set debugging level for our debug class
 define('DEBUG', 0);
 
+// SALT used to hash passwords
 define('SALT', 'PLEASEMAKEMESOMETHINGRANDOM');
 
 $config = array(
@@ -26,6 +26,14 @@ $config = array(
     'target' =>  '/ltc_usd/ticker',
     'currency' => 'USD'             // Used in ministats template
   ),
+/**
+ * Another Example for API
+  'price' => array(
+    'url' =>     'http://www.coinchoose.com',
+    'target' =>  '/api.php',
+    'currency' => 'BTC'
+  ),
+ **/
   'ap_threshold' => array(
     'min' => 1,
     'max' => 250