<?php

////////////////////////////////////////////////////////////////////////////

//                              SnowCMS v2.0                              //

//                           By the SnowCMS Team                          //

//                             www.snowcms.com                            //

//            Released under the Microsoft Reciprocal License             //

//                 www.opensource.org/licenses/ms-rl.html                 //

////////////////////////////////////////////////////////////////////////////

//                                                                        //

//       SnowCMS originally pawned by soren121 started in early 2008      //

//                                                                        //

////////////////////////////////////////////////////////////////////////////

//                                                                        //

//                  SnowCMS v2.0 began in November 2009                   //

//                                                                        //

////////////////////////////////////////////////////////////////////////////

//                       File version: SnowCMS 2.0                        //

////////////////////////////////////////////////////////////////////////////



if(!defined('INSNOW'))

{

	die('Nice try...');

}



// Title: Add Plugin



if(!function_exists('admin_plugins_add'))

{

	/*

		Function: admin_plugins_add



		Handles the downloading and extracting of plugins.



		Parameters:

			none



		Returns:

			void - Nothing is returned by this function.



		Note:

			This function is overloadable.

	*/

	function admin_plugins_add()

	{

		api()->run_hooks('admin_plugins_add');



		// Can you add plugins?

		if(!member()->can('add_plugins'))

		{

			// That's what I thought!

			admin_access_denied();

		}



		admin_plugins_add_generate_form();

		$form = api()->load_class('Form');



		if(!empty($_POST['add_plugins_form']))

		{

			$form->process('add_plugins_form');

		}



		// We may need to do a bit of cleanup in the plugin directory. There may

		// be some temporary files that don't need to be there anymore.

		if(empty($_SESSION['plugindir_cleaned']) || ((int)$_SESSION['plugindir_cleaned'] + 86400) < time_utc())

		{

			foreach(scandir(plugindir) as $filename)

			{

				// We don't want to delete any directories, files not ending with

				// .tmp, or a file that is newer than a few hours.

				if(is_dir(plugindir. '/'. $filename) || substr($filename, -4, 4) != '.tmp' || (filemtime(plugindir. '/'. $filename) + 10800) > time_utc())

				{

					continue;

				}



				@unlink(plugindir. '/'. $filename);

			}



			// Thanks for your help, but we won't have you do it again for awhile!

			$_SESSION['plugindir_cleaned'] = time_utc();

		}



		admin_current_area('plugins_add');



		theme()->set_title(l('Add Plugin'));



		api()->context['form'] = $form;



		theme()->render('admin_plugins_add');

	}

}



if(!function_exists('admin_plugins_add_generate_form'))

{

	/*

		Function: admin_plugins_add_generate_form



		Generates the form which allows you to upload or download a plugin.



		Parameters:

			none



		Returns:

			void - Nothing is returned by this function.



		Note:

			This function is overloadable.

	*/

	function admin_plugins_add_generate_form()

	{

		$form = api()->load_class('Form');



		// Let's get to making our form, shall we?

		$form->add('add_plugins_form', array(

																		 'action' => baseurl. '/index.php?action=admin&amp;sa=plugins_add',

																		 'callback' => 'admin_plugins_add_handle',

																		 'method' => 'post',

																		 'submit' => l('Add plugin'),

																	 ));



		$form->current('add_plugins_form');



		// Do you want to upload the plugin?

		$form->add_input(array(

											 'name' => 'plugin_file',

											 'type' => 'file',

											 'label' => l('From a file'),

											 'subtext' => l('Select the plugin file you want to install.'),

											 'required' => false,

										 ));



		// A URL? Sure!

		$form->add_input(array(

											 'name' => 'plugin_url',

											 'type' => 'string',

											 'label' => l('From a URL'),

											 'subtext' => l('Enter the URL of the plugin you want to download and install.'),

											 'default_value' => 'http://',

										 ));

	}

}



if(!function_exists('admin_plugins_add_handle'))

{

	/*

		Function: admin_plugins_add_handle



		Handles the form data submitted through the add plugins form.



		Parameters:

			array $data

			array &$errors



		Returns:

			bool - Returns false on failure, the user gets redirected to

						 {baseurl}/index.php?action=admin&sa=plugins_add&install={filename}

						 where the status of the plugin is checked and then installed.



		Note:

			This function is overloadable.

	*/

	function admin_plugins_add_handle($data, &$errors = array())

	{

		// Where should this plugin go..?

		$filename = plugindir. '/'. uniqid('plugin_');

		while(file_exists($filename))

		{

			$filename = plugindir. '/'. uniqid('plugin_');

		}



		// We wanted to make sure the directory didn't exist yet.

		$filename .= '.tmp';



		// Uploading a file, are we?

		if(!empty($data['plugin_file']['tmp_name']))

		{

			// Simply try to move the file now.

			if(!move_uploaded_file($data['plugin_file']['tmp_name'], $filename))

			{

				// Woops, didn't work!

				$errors[] = l('Plugin upload failed.');



				return false;

			}

		}

		// You want us to download it? I can do that.

		elseif(!empty($data['plugin_url']) && strtolower($data['plugin_url']) != 'http://')

		{

			// The HTTP class can do all this, awesomely, of course!

			$http = api()->load_class('HTTP');



			if(!$http->request($data['plugin_url'], array(), 0, $filename))

			{

				// Sorry, but looks like it didn't work!!!

				$errors[] = l('Failed to download the plugin from &quot;%s&quot;', htmlchars($data['plugin_url']));



				return false;

			}

		}

		else

		{

			$errors[] = l('No file or URL specified.');



			return false;

		}



		// If it worked, we get redirected!

		redirect(baseurl. '/index.php?action=admin&sa=plugins_add&install='. urlencode(basename($filename)). '&sid='. member()->session_id());

	}

}



if(!function_exists('admin_plugins_install'))

{

	/*

		Function: admin_plugins_install



		Handles the actual installing of the plugin, after things

		such as the plugins status is checked on SnowCMS.com



		Parameters:

			none



		Returns:

			void - Nothing is returned by this function.



		Note:

			This function is overloadable.

	*/

	function admin_plugins_install()

	{

		api()->run_hooks('admin_plugins_install');



		// Can you add plugins?

		if(!member()->can('add_plugins'))

		{

			// That's what I thought!

			admin_access_denied();

		}



		admin_current_area('plugins_add');



		// Check the session id.

		verify_request('get');



		// Which file are you installing as a plugin?

		$filename = realpath(plugindir. '/'. basename($_GET['install']));

		$extension = explode('.', $filename);



		// Make sure the file exists, that it is a file, that it is within the

		// plugin directory, and that the extension is valid.

		if(empty($filename) || !is_file($filename) || substr($filename, 0, strlen(realpath(plugindir))) != realpath(plugindir) || count($extension) < 2 || $extension[count($extension) - 1] != 'tmp')

		{

			// Must not be valid, from what we can tell.

			theme()->set_title(l('An Error Occurred'));



			api()->context['error_title'] = '<img src="'. theme()->url(). '/style/images/plugins_add-small.png" alt="" /> '. l('Plugin Installation Error');

			api()->context['error_message'] = l('Sorry, but the supplied plugin file either does not exist or is not a valid file.');



			theme()->render('error');

		}

		else

		{

			// Time to get to installation!

			theme()->set_title(l('Installing Plugin'));



			// The Component class makes this a snap.

			$component = api()->load_class('Component');



			$result = $component->install($filename, 'plugin', array(

																													 'ignore_status' => isset($_GET['status']) && $_GET['status'] == 'ignore',

																													 'ignore_compatibility' => isset($_GET['compat']) && $_GET['compat'] == 'ignore',

																												 ));



			// Make our life even easier, please.

			foreach($result as $index => $value)

			{

				api()->context[$index] = $value;

			}



			// Should we delete that uploaded file?

			if(!empty($result['completed']))

			{

				unlink($filename);

			}



			// Set a couple of things.

			api()->context['install'] = htmlchars($_GET['install']);



			theme()->render('admin_plugins_install');

		}

	}

}

?>