From ee108569f5babea403cd33bad6bf04a4a9ab4f8d Mon Sep 17 00:00:00 2001
From: ozh <ozh@ozh.org>
Date: Wed, 18 Dec 2013 17:58:20 +0100
Subject: [PATCH] Core version check -- first pass

---
 includes/functions-update.php | 102 ++++++++++++++++++++++++++++++++++
 includes/load-yourls.php      |   1 +
 2 files changed, 103 insertions(+)
 create mode 100644 includes/functions-update.php

diff --git a/includes/functions-update.php b/includes/functions-update.php
new file mode 100644
index 0000000..5545073
--- /dev/null
+++ b/includes/functions-update.php
@@ -0,0 +1,102 @@
+<?php
+/*
+ * YOURLS
+ * Functions related to update checks and api.yourls.org
+ *
+ */
+
+/**
+ * Check if there's a newer version of YOURLS
+ *
+ * This function collects various stats to help us improve YOURLS. See https://gist.github.com/ozh/5518761
+ * Results of requests sent to api.yourls.org are stored in option 'core_version_checks' and is an array
+ * with the following keys:
+ *    - failed_attempts : number of consecutive failed attempts
+ *    - last_attempt    : time() of last attempt
+ *    - last_result     : last content retrieved from api.yourls.org
+ *
+ * @since 1.7
+ * @param unknown_type $a    TODO
+ * @return unknown           TODO
+ */
+function yourls_version_check() {
+
+	if( defined( 'YOURLS_NO_VERSION_CHECK' ) && YOURLS_NO_VERSION_CHECK )
+		return false;
+		
+	global $ydb, $yourls_user_passwords;
+	
+	// Config file location ('/user' or '/includes')
+	$conf_loc = str_replace( YOURLS_ABSPATH, '', YOURLS_CONFIGFILE );
+	$conf_loc = str_replace( '/config.php', '', $conf_loc );
+	
+	$checks = yourls_get_option( 'core_version_checks' );
+	if( !$checks ) {
+		$checks['failed_attempts'] = 0;
+	}
+		
+	// The collection of stuff to report
+	$stuff = array(
+		'md5'                => md5( YOURLS_SITE . YOURLS_ABSPATH ),
+
+		'failed_attempts'    => $checks['failed'],
+		'yourls_site'        => YOURLS_SITE,
+		'yourls_version'     => YOURLS_VERSION,
+		'php_version'        => phpversion(),
+		'mysql_version'      => $ydb->mysql_version(),
+		'locale'             => yourls_get_locale(),
+
+		'db_driver'          => YOURLS_DB_DRIVER,
+		'db_ext_pdo'         => extension_loaded( 'pdo_mysql' ),
+		'db_ext_mysql'       => extension_loaded( 'mysql' ),
+		'db_ext_mysqli'      => extension_loaded( 'mysqli' ),
+		'ext_curl'           => extension_loaded( 'curl' ),
+
+		'num_users'          => count( $yourls_user_passwords ),
+		'config_location'    => $conf_loc,
+		'yourls_private'     => YOURLS_PRIVATE,
+		'yourls_unique'      => YOURLS_UNIQUE_URLS,
+		'yourls_url_convert' => YOURLS_URL_CONVERT,
+		'num_active_plugins' => yourls_has_active_plugins(),
+	);
+	
+	$stuff = yourls_apply_filter( 'version_check_stuff', $stuff );
+	
+	// Send it in
+	$url = 'https://api.yourls.org/core/version/1.0/';
+	$req = yourls_http_post( $url, array(), $stuff );
+	$checks['last_attempt'] = time();
+	
+	// Unexpected results ?
+	if( is_string( $req ) or !$req->success ) {
+		$checks['failed_attempts']++;
+		$checks['last_result'] = '';
+		yourls_update_option( 'core_version_checks', $checks );
+		return false;
+	}
+	
+	// Parse response
+	$json = json_decode( trim( $req->body ) );
+	
+	// All went OK - mark this down!
+	$checks['failed_attempts'] = 0;
+	$checks['last_result']     = $json;
+	yourls_update_option( 'core_version_checks', $checks );
+	
+	return true;
+}
+
+
+/**
+ * Determine if we need to check for a newer YOURLS version
+ *
+ * Longer description
+ *
+ * @since
+ * @param unknown_type $a    TODO
+ * @return unknown           TODO
+ */
+function yourls_maybe_check_version() {
+
+
+}
\ No newline at end of file
diff --git a/includes/load-yourls.php b/includes/load-yourls.php
index 9e6f8f2..924879b 100644
--- a/includes/load-yourls.php
+++ b/includes/load-yourls.php
@@ -111,6 +111,7 @@
 require_once( YOURLS_INC.'/functions-compat.php' );
 require_once( YOURLS_INC.'/functions-html.php' );
 require_once( YOURLS_INC.'/functions-http.php' );
+require_once( YOURLS_INC.'/functions-update.php' );
 require_once( YOURLS_INC.'/functions-infos.php' );
 
 // Load auth functions if needed
-- 
2.45.0