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<?php

namespace Zotlabs\Module\Admin;

use App;
use \Zotlabs\Storage\GitRepo;
use \Michelf\MarkdownExtra;

class Addons {

	/**
	 * @brief
	 *
	 */
	function post() {

		if(argc() > 2 && is_file("addon/" . argv(2) . "/" . argv(2) . ".php")) {
			@include_once("addon/" . argv(2) . "/" . argv(2) . ".php");
			if(function_exists(argv(2).'_plugin_admin_post')) {
				$func = argv(2) . '_plugin_admin_post';
				$func();
			}

			goaway(z_root() . '/admin/addons/' . argv(2) );
		}
		elseif(argc() > 2) {
			switch(argv(2)) {
				case 'updaterepo':
					if (array_key_exists('repoName', $_REQUEST)) {
						$repoName = $_REQUEST['repoName'];
					}
					else {
						json_return_and_die(array('message' => 'No repo name provided.', 'success' => false));
					}
					$extendDir = 'store/[data]/git/sys/extend';
					$addonDir = $extendDir . '/addon';
					if (!file_exists($extendDir)) {
						if (!mkdir($extendDir, 0770, true)) {
							logger('Error creating extend folder: ' . $extendDir);
							json_return_and_die(array('message' => 'Error creating extend folder: ' . $extendDir, 'success' => false));
						}
						else {
							if (!symlink(realpath('extend/addon'), $addonDir)) {
								logger('Error creating symlink to addon folder: ' . $addonDir);
								json_return_and_die(array('message' => 'Error creating symlink to addon folder: ' . $addonDir, 'success' => false));
							}
						}
					}
					$repoDir = 'store/[data]/git/sys/extend/addon/' . $repoName;
					if (!is_dir($repoDir)) {
						logger('Repo directory does not exist: ' . $repoDir);
						json_return_and_die(array('message' => 'Invalid addon repo.', 'success' => false));
					}
					if (!is_writable($repoDir)) {
						logger('Repo directory not writable to web server: ' . $repoDir);
						json_return_and_die(array('message' => 'Repo directory not writable to web server.', 'success' => false));
					}
					$git = new GitRepo('sys', null, false, $repoName, $repoDir);
					try {
						if ($git->pull()) {
							$files = array_diff(scandir($repoDir), array('.', '..'));
							foreach ($files as $file) {
								if (is_dir($repoDir . '/' . $file) && $file !== '.git') {
									$source = '../extend/addon/' . $repoName . '/' . $file;
									$target = realpath('addon/') . '/' . $file;
									unlink($target);
									if (!symlink($source, $target)) {
										logger('Error linking addons to /addon');
										json_return_and_die(array('message' => 'Error linking addons to /addon', 'success' => false));
									}
								}
							}
							json_return_and_die(array('message' => 'Repo updated.', 'success' => true));
						} else {
							json_return_and_die(array('message' => 'Error updating addon repo.', 'success' => false));
						}
					} catch (\PHPGit\Exception\GitException $e) {
						json_return_and_die(array('message' => 'Error updating addon repo.', 'success' => false));
					}
				case 'removerepo':
					if (array_key_exists('repoName', $_REQUEST)) {
						$repoName = $_REQUEST['repoName'];
					} else {
						json_return_and_die(array('message' => 'No repo name provided.', 'success' => false));
					}
					$extendDir = 'store/[data]/git/sys/extend';
					$addonDir = $extendDir . '/addon';
					if (!file_exists($extendDir)) {
						if (!mkdir($extendDir, 0770, true)) {
							logger('Error creating extend folder: ' . $extendDir);
							json_return_and_die(array('message' => 'Error creating extend folder: ' . $extendDir, 'success' => false));
						} else {
							if (!symlink(realpath('extend/addon'), $addonDir)) {
								logger('Error creating symlink to addon folder: ' . $addonDir);
								json_return_and_die(array('message' => 'Error creating symlink to addon folder: ' . $addonDir, 'success' => false));
							}
						}
					}
					$repoDir = 'store/[data]/git/sys/extend/addon/' . $repoName;
					if (!is_dir($repoDir)) {
						logger('Repo directory does not exist: ' . $repoDir);
						json_return_and_die(array('message' => 'Invalid addon repo.', 'success' => false));
					}
					if (!is_writable($repoDir)) {
						logger('Repo directory not writable to web server: ' . $repoDir);
						json_return_and_die(array('message' => 'Repo directory not writable to web server.', 'success' => false));
					}
					/// @TODO remove directory and unlink /addon/files
					if (rrmdir($repoDir)) {
						json_return_and_die(array('message' => 'Repo deleted.', 'success' => true));
					} else {
						json_return_and_die(array('message' => 'Error deleting addon repo.', 'success' => false));
					}
				case 'installrepo':
					if (array_key_exists('repoURL', $_REQUEST)) {
						require_once('library/PHPGit.autoload.php');			// Load PHPGit dependencies
						$repoURL = $_REQUEST['repoURL'];
						$extendDir = 'store/[data]/git/sys/extend';
						$addonDir = $extendDir . '/addon';
						if (!file_exists($extendDir)) {
							if (!mkdir($extendDir, 0770, true)) {
								logger('Error creating extend folder: ' . $extendDir);
								json_return_and_die(array('message' => 'Error creating extend folder: ' . $extendDir, 'success' => false));
							} else {
								if (!symlink(realpath('extend/addon'), $addonDir)) {
									logger('Error creating symlink to addon folder: ' . $addonDir);
									json_return_and_die(array('message' => 'Error creating symlink to addon folder: ' . $addonDir, 'success' => false));
								}
							}
						}
						if (!is_writable($extendDir)) {
							logger('Directory not writable to web server: ' . $extendDir);
							json_return_and_die(array('message' => 'Directory not writable to web server.', 'success' => false));
						}
						$repoName = null;
						if (array_key_exists('repoName', $_REQUEST) && $_REQUEST['repoName'] !== '') {
							$repoName = $_REQUEST['repoName'];
						} else {
							$repoName = GitRepo::getRepoNameFromURL($repoURL);
						}
						if (!$repoName) {
							logger('Invalid git repo');
							json_return_and_die(array('message' => 'Invalid git repo', 'success' => false));
						}
						$repoDir = $addonDir . '/' . $repoName;
						$tempRepoBaseDir = 'store/[data]/git/sys/temp/';
						$tempAddonDir = $tempRepoBaseDir . $repoName;

						if (!is_writable($addonDir) || !is_writable($tempAddonDir)) {
							logger('Temp repo directory or /extend/addon not writable to web server: ' . $tempAddonDir);
							json_return_and_die(array('message' => 'Temp repo directory not writable to web server.', 'success' => false));
						}
						rename($tempAddonDir, $repoDir);

						if (!is_writable(realpath('addon/'))) {
							logger('/addon directory not writable to web server: ' . $tempAddonDir);
							json_return_and_die(array('message' => '/addon directory not writable to web server.', 'success' => false));
						}
						$files = array_diff(scandir($repoDir), array('.', '..'));
						foreach ($files as $file) {
							if (is_dir($repoDir . '/' . $file) && $file !== '.git') {
								$source = '../extend/addon/' . $repoName . '/' . $file;
								$target = realpath('addon/') . '/' . $file;
								unlink($target);
								if (!symlink($source, $target)) {
									logger('Error linking addons to /addon');
									json_return_and_die(array('message' => 'Error linking addons to /addon', 'success' => false));
								}
							}
						}
						$git = new GitRepo('sys', $repoURL, false, $repoName, $repoDir);
						$repo = $git->probeRepo();
						json_return_and_die(array('repo' => $repo, 'message' => '', 'success' => true));
					}
				case 'addrepo':
					if (array_key_exists('repoURL', $_REQUEST)) {
						require_once('library/PHPGit.autoload.php');	 // Load PHPGit dependencies
						$repoURL = $_REQUEST['repoURL'];
						$extendDir = 'store/[data]/git/sys/extend';
						$addonDir = $extendDir . '/addon';
						$tempAddonDir = realpath('store/[data]') . '/git/sys/temp';
						if (!file_exists($extendDir)) {
							if (!mkdir($extendDir, 0770, true)) {
								logger('Error creating extend folder: ' . $extendDir);
								json_return_and_die(array('message' => 'Error creating extend folder: ' . $extendDir, 'success' => false));
							} else {
								if (!symlink(realpath('extend/addon'), $addonDir)) {
									logger('Error creating symlink to addon folder: ' . $addonDir);
									json_return_and_die(array('message' => 'Error creating symlink to addon folder: ' . $addonDir, 'success' => false));
								}
							}
						}
						if (!is_dir($tempAddonDir)) {
							if (!mkdir($tempAddonDir, 0770, true)) {
								logger('Error creating temp plugin repo folder: ' . $tempAddonDir);
								json_return_and_die(array('message' => 'Error creating temp plugin repo folder: ' . $tempAddonDir, 'success' => false));
							}
						}
						$repoName = null;
						if (array_key_exists('repoName', $_REQUEST) && $_REQUEST['repoName'] !== '') {
							$repoName = $_REQUEST['repoName'];
						} else {
							$repoName = GitRepo::getRepoNameFromURL($repoURL);
						}
						if (!$repoName) {
							logger('Invalid git repo');
							json_return_and_die(array('message' => 'Invalid git repo: ' . $repoName, 'success' => false));
						}
						$repoDir = $tempAddonDir . '/' . $repoName;
						if (!is_writable($tempAddonDir)) {
							logger('Temporary directory for new addon repo is not writable to web server: ' . $tempAddonDir);
							json_return_and_die(array('message' => 'Temporary directory for new addon repo is not writable to web server.', 'success' => false));
						}
						// clone the repo if new automatically
						$git = new GitRepo('sys', $repoURL, true, $repoName, $repoDir);

						$remotes = $git->git->remote();
						$fetchURL = $remotes['origin']['fetch'];
						if ($fetchURL !== $git->url) {
							if (rrmdir($repoDir)) {
								$git = new GitRepo('sys', $repoURL, true, $repoName, $repoDir);
							} else {
								json_return_and_die(array('message' => 'Error deleting existing addon repo.', 'success' => false));
							}
						}
						$repo = $git->probeRepo();
						$repo['readme'] = $repo['manifest'] = null;
						foreach ($git->git->tree('master') as $object) {
							if ($object['type'] == 'blob' && (strtolower($object['file']) === 'readme.md' || strtolower($object['file']) === 'readme')) {
								$repo['readme'] = MarkdownExtra::defaultTransform($git->git->cat->blob($object['hash']));
							} else if ($object['type'] == 'blob' && strtolower($object['file']) === 'manifest.json') {
								$repo['manifest'] = $git->git->cat->blob($object['hash']);
							}
						}
						json_return_and_die(array('repo' => $repo, 'message' => '', 'success' => true));
					} else {
						json_return_and_die(array('message' => 'No repo URL provided', 'success' => false));
					}
					break;
				default:
					break;
			}
		}
	}

	/**
	 * @brief Addons admin page.
	 *
	 * @return string with parsed HTML
	 */
	function get() {

		/*
		 * Single plugin
		 */

		if (App::$argc == 3){
			$plugin = App::$argv[2];
			if (!is_file("addon/$plugin/$plugin.php")){
				notice( t("Item not found.") );
				return '';
			}

			$enabled = in_array($plugin,App::$plugins);
			$info = get_plugin_info($plugin);
			$x = check_plugin_versions($info);

			// disable plugins which are installed but incompatible versions

			if($enabled && ! $x) {
				$enabled = false;
				$idz = array_search($plugin, App::$plugins);
				if ($idz !== false) {
					unset(App::$plugins[$idz]);
					uninstall_plugin($plugin);
					set_config("system","addon", implode(", ",App::$plugins));
				}
			}
			$info['disabled'] = 1-intval($x);

			if (x($_GET,"a") && $_GET['a']=="t"){
				check_form_security_token_redirectOnErr('/admin/addons', 'admin_addons', 't');
				$pinstalled = false;
				// Toggle plugin status
				$idx = array_search($plugin, App::$plugins);
				if ($idx !== false){
					unset(App::$plugins[$idx]);
					uninstall_plugin($plugin);
					$pinstalled = false;
					info( sprintf( t("Plugin %s disabled."), $plugin ) );
				} else {
					App::$plugins[] = $plugin;
					install_plugin($plugin);
					$pinstalled = true;
					info( sprintf( t("Plugin %s enabled."), $plugin ) );
				}
				set_config("system","addon", implode(", ",App::$plugins));

				if($pinstalled) {
					@require_once("addon/$plugin/$plugin.php");
					if(function_exists($plugin.'_plugin_admin'))
						goaway(z_root() . '/admin/addons/' . $plugin);
				}
				goaway(z_root() . '/admin/addons' );
			}

			// display plugin details

			if (in_array($plugin, App::$plugins)){
				$status = 'on';
				$action = t('Disable');
			} else {
				$status = 'off';
				$action =  t('Enable');
			}

			$readme = null;
			if (is_file("addon/$plugin/README.md")){
				$readme = file_get_contents("addon/$plugin/README.md");
				$readme = MarkdownExtra::defaultTransform($readme);
			} else if (is_file("addon/$plugin/README")){
				$readme = "<pre>". file_get_contents("addon/$plugin/README") ."</pre>";
			}

			$admin_form = '';

			$r = q("select * from addon where plugin_admin = 1 and aname = '%s' limit 1",
				dbesc($plugin)
			);

			if($r) {
				@require_once("addon/$plugin/$plugin.php");
				if(function_exists($plugin.'_plugin_admin')) {
					$func = $plugin.'_plugin_admin';
					$func($admin_form);
				}
			}


			$t = get_markup_template('admin_plugins_details.tpl');
			return replace_macros($t, array(
				'$title' => t('Administration'),
				'$page' => t('Addons'),
				'$toggle' => t('Toggle'),
				'$settings' => t('Settings'),
				'$baseurl' => z_root(),

				'$plugin' => $plugin,
				'$status' => $status,
				'$action' => $action,
				'$info' => $info,
				'$str_author' => t('Author: '),
				'$str_maintainer' => t('Maintainer: '),
				'$str_minversion' => t('Minimum project version: '),
				'$str_maxversion' => t('Maximum project version: '),
				'$str_minphpversion' => t('Minimum PHP version: '),
				'$str_serverroles' => t('Compatible Server Roles: '),
				'$str_requires' => t('Requires: '),
				'$disabled' => t('Disabled - version incompatibility'),

				'$admin_form' => $admin_form,
				'$function' => 'addons',
				'$screenshot' => '',
				'$readme' => $readme,

				'$form_security_token' => get_form_security_token('admin_addons'),
			));
		}


		/*
		 * List plugins
		 */
		$plugins = array();
		$files = glob('addon/*/');
		if($files) {
			foreach($files as $file) {
				if (is_dir($file)){
					if($file == 'addon/addon_common/')
						continue;

					list($tmp, $id) = array_map('trim', explode('/', $file));
					$info = get_plugin_info($id);
					$enabled = in_array($id,App::$plugins);
					$x = check_plugin_versions($info);

					// disable plugins which are installed but incompatible versions

					if($enabled && ! $x) {
						$enabled = false;
						$idz = array_search($id, App::$plugins);
						if ($idz !== false) {
							unset(App::$plugins[$idz]);
							uninstall_plugin($id);
							set_config("system","addon", implode(", ",App::$plugins));
						}
					}
					$info['disabled'] = 1-intval($x);

					$plugins[] = array( $id, (($enabled)?"on":"off") , $info);
				}
			}
		}

		usort($plugins,'self::plugin_sort');

		$allowManageRepos = false;
		if(is_writable('extend/addon') && is_writable('store/[data]')) {
			$allowManageRepos = true;
		}

		$admin_plugins_add_repo_form= replace_macros(
			get_markup_template('admin_plugins_addrepo.tpl'), array(
				'$post' => 'admin/addons/addrepo',
				'$desc' => t('Enter the public git repository URL of the addon repo.'),
				'$repoURL' => array('repoURL', t('Addon repo git URL'), '', ''),
				'$repoName' => array('repoName', t('Custom repo name'), '', '', t('(optional)')),
				'$submit' => t('Download Addon Repo')
			)
		);
		$newRepoModalID = random_string(3);
		$newRepoModal = replace_macros(
			get_markup_template('generic_modal.tpl'), array(
				'$id' => $newRepoModalID,
				'$title' => t('Install new repo'),
				'$ok' => t('Install'),
				'$cancel' => t('Cancel')
			)
		);

		$reponames = $this->listAddonRepos();
		$addonrepos = [];
		foreach($reponames as $repo) {
			$addonrepos[] = array('name' => $repo, 'description' => '');
			/// @TODO Parse repo info to provide more information about repos
		}

		$t = get_markup_template('admin_plugins.tpl');
		return replace_macros($t, array(
			'$title' => t('Administration'),
			'$page' => t('Addons'),
			'$submit' => t('Submit'),
			'$baseurl' => z_root(),
			'$function' => 'addons',
			'$plugins' => $plugins,
			'$disabled' => t('Disabled - version incompatibility'),
			'$form_security_token' => get_form_security_token('admin_addons'),
			'$allowManageRepos' => $allowManageRepos,
			'$managerepos' => t('Manage Repos'),
			'$installedtitle' => t('Installed Addon Repositories'),
			'$addnewrepotitle' =>	t('Install a New Addon Repository'),
			'$expandform' => false,
			'$form' => $admin_plugins_add_repo_form,
			'$newRepoModal' => $newRepoModal,
			'$newRepoModalID' => $newRepoModalID,
			'$addonrepos' => $addonrepos,
			'$repoUpdateButton' => t('Update'),
			'$repoBranchButton' => t('Switch branch'),
			'$repoRemoveButton' => t('Remove')
		));
	}

	function listAddonRepos() {
		$addonrepos = [];
		$addonDir = 'extend/addon/';
		if(is_dir($addonDir)) {
			if ($handle = opendir($addonDir)) {
				while (false !== ($entry = readdir($handle))) {
					if ($entry != "." && $entry != "..") {
						$addonrepos[] = $entry;
					}
				}
				closedir($handle);
			}
		}
		return $addonrepos;
	}

	static public function plugin_sort($a,$b) {
		return(strcmp(strtolower($a[2]['name']),strtolower($b[2]['name'])));
	}

}