Merge branch 'dev' into sabre32

2 files changed, 471 insertions, 0 deletions

diff --git a/include/widgets.php b/include/widgets.php
index 312b63729..3ca189af0 100644
--- a/include/widgets.php
+++ b/include/widgets.php
@@ -856,6 +856,78 @@ function widget_chatroom_members() {
 	return $o;
 }
 
+function widget_wiki_list($arr) {
+
+	require_once("include/wiki.php");
+	$channel = null;
+	if (argc() < 2 && local_channel()) { 
+		// This should not occur because /wiki should redirect to /wiki/channel ...
+		$channel = \App::get_channel();
+	} else {
+		$channel = get_channel_by_nick(argv(1));	// Channel being viewed by observer
+	}
+	if (!$channel) {
+		return '';
+	}
+	$wikis = wiki_list($channel, get_observer_hash());
+	if ($wikis) {
+		return replace_macros(get_markup_template('wikilist.tpl'), array(
+			'$header' => t('Wiki List'),
+			'$channel' => $channel['channel_address'],
+			'$wikis' => $wikis['wikis'],
+			// If the observer is the local channel owner, show the wiki controls
+			'$showControls' => ((local_channel() === intval($channel['channel_id'])) ? true : false)
+		));
+	}
+	return '';
+}
+
+function widget_wiki_pages($arr) {
+
+	require_once("include/wiki.php");
+	$channelname = ((array_key_exists('channel',$arr)) ? $arr['channel'] : '');
+	$wikiname = '';
+	if (array_key_exists('refresh', $arr)) {
+		$not_refresh = (($arr['refresh']=== true) ? false : true);
+	} else {
+		$not_refresh = true;
+	}
+	$pages = array();
+	if (!array_key_exists('resource_id', $arr)) {
+		$hide = true;
+	} else {
+		$p = wiki_page_list($arr['resource_id']);
+		if ($p['pages']) {
+			$pages = $p['pages'];
+			$w = $p['wiki'];
+			// Wiki item record is $w['wiki']
+			$wikiname = $w['urlName'];
+			if (!$wikiname) {
+				$wikiname = '';
+			}
+		}
+	}
+	return replace_macros(get_markup_template('wiki_page_list.tpl'), array(
+			'$hide' => $hide,
+			'$not_refresh' => $not_refresh,
+			'$header' => t('Wiki Pages'),
+			'$channel' => $channelname,
+			'$wikiname' => $wikiname,
+			'$pages' => $pages
+	));
+}
+
+function widget_wiki_page_history($arr) {
+	require_once("include/wiki.php");
+	$pageUrlName = ((array_key_exists('pageUrlName', $arr)) ? $arr['pageUrlName'] : '');
+	$resource_id = ((array_key_exists('resource_id', $arr)) ? $arr['resource_id'] : '');
+	$pageHistory = wiki_page_history(array('resource_id' => $resource_id, 'pageUrlName' => $pageUrlName));
+
+	return replace_macros(get_markup_template('wiki_page_history.tpl'), array(
+			'$pageHistory' => $pageHistory['history']
+	));
+}
+
 function widget_bookmarkedchats($arr) {
 
 	if(! feature_enabled(App::$profile['profile_uid'],'ajaxchat'))
diff --git a/include/wiki.php b/include/wiki.php
new file mode 100644
index 000000000..f0785d549
--- /dev/null
+++ b/include/wiki.php
@@ -0,0 +1,399 @@
+<?php
+/**
+ * @file include/wiki.php
+ * @brief Wiki related functions.
+ */
+
+use \Zotlabs\Storage\GitRepo as GitRepo;
+define ( 'WIKI_ITEM_RESOURCE_TYPE', 'wiki' );
+
+function wiki_list($channel, $observer_hash) {
+	$sql_extra = item_permissions_sql($channel['channel_id'], $observer_hash);
+	$wikis = q("SELECT * FROM item WHERE resource_type = '%s' AND mid = parent_mid AND uid = %d AND item_deleted = 0 $sql_extra", 
+			dbesc(WIKI_ITEM_RESOURCE_TYPE),
+			intval($channel['channel_id'])
+	);
+	foreach($wikis as &$w) {		
+		$w['rawName'] = get_iconfig($w, 'wiki', 'rawName');
+		$w['htmlName'] = get_iconfig($w, 'wiki', 'htmlName');
+		$w['urlName'] = get_iconfig($w, 'wiki', 'urlName');
+		$w['path'] = get_iconfig($w, 'wiki', 'path');
+	}
+	// TODO: query db for wikis the observer can access. Return with two lists, for read and write access
+	return array('wikis' => $wikis);
+}
+
+function wiki_page_list($resource_id) {
+	// TODO: Create item table records for pages so that metadata like title can be applied
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('pages' => null, 'wiki' => null);
+	}
+	$pages = array();
+	if (is_dir($w['path']) === true) {
+		$files = array_diff(scandir($w['path']), array('.', '..', '.git'));
+		// TODO: Check that the files are all text files
+		
+		foreach($files as $file) {
+			// strip the .md file extension and unwrap URL encoding to leave HTML encoded name
+			$pages[] = array('title' => urldecode(substr($file, 0, -3)), 'url' => urlencode(substr($file, 0, -3)));
+		}
+	}
+
+	return array('pages' => $pages, 'wiki' => $w);
+}
+
+function wiki_init_wiki($channel, $wiki) {
+	// Store the path as a relative path, but pass absolute path to mkdir
+	$path = 'store/[data]/git/'.$channel['channel_address'].'/wiki/'.$wiki['urlName'];
+	if (!os_mkdir(__DIR__ . '/../' . $path, 0770, true)) {
+		logger('Error creating wiki path: ' . $path);
+		return null;
+	}
+	// Create GitRepo object 	
+	$git = new GitRepo($channel['channel_address'], null, false, $name, __DIR__ . '/../' . $path);	
+	if(!$git->initRepo()) {
+		logger('Error creating new git repo in ' . $git->path);
+		return null;
+	}
+	
+	return array('path' => $path);
+}
+
+function wiki_create_wiki($channel, $observer_hash, $wiki, $acl) {
+	$wikiinit = wiki_init_wiki($channel, $wiki);	
+	if (!$wikiinit['path']) {
+		notice('Error creating wiki');
+		return array('item' => null, 'success' => false);
+	}
+	$path = $wikiinit['path'];
+	// Generate unique resource_id using the same method as item_message_id()
+	do {
+		$dups = false;
+		$resource_id = random_string();
+		$r = q("SELECT mid FROM item WHERE resource_id = '%s' AND resource_type = '%s' AND uid = %d LIMIT 1", 
+			dbesc($resource_id), 
+			dbesc(WIKI_ITEM_RESOURCE_TYPE), 
+			intval($channel['channel_id'])
+		);
+		if (count($r))
+			$dups = true;
+	} while ($dups == true);
+	$ac = $acl->get();
+	$mid = item_message_id();
+	$arr = array();	// Initialize the array of parameters for the post
+	$item_hidden = 0; // TODO: Allow form creator to send post to ACL about new game automatically
+	$wiki_url = z_root() . '/wiki/' . $channel['channel_address'] . '/' . $wiki['urlName'];
+	$arr['aid'] = $channel['channel_account_id'];
+	$arr['uid'] = $channel['channel_id'];
+	$arr['mid'] = $mid;
+	$arr['parent_mid'] = $mid;
+	$arr['item_hidden'] = $item_hidden;
+	$arr['resource_type'] = WIKI_ITEM_RESOURCE_TYPE;
+	$arr['resource_id'] = $resource_id;
+	$arr['owner_xchan'] = $channel['channel_hash'];
+	$arr['author_xchan'] = $observer_hash;
+	$arr['plink'] = z_root() . '/channel/' . $channel['channel_address'] . '/?f=&mid=' . $arr['mid'];
+	$arr['llink'] = $arr['plink'];
+	$arr['title'] = $wiki['htmlName'];		 // name of new wiki;
+	$arr['allow_cid'] = $ac['allow_cid'];
+	$arr['allow_gid'] = $ac['allow_gid'];
+	$arr['deny_cid'] = $ac['deny_cid'];
+	$arr['deny_gid'] = $ac['deny_gid'];
+	$arr['item_wall'] = 1;
+	$arr['item_origin'] = 1;
+	$arr['item_thread_top'] = 1;
+	$arr['item_private'] = intval($acl->is_private());
+	$arr['verb'] = ACTIVITY_CREATE;
+	$arr['obj_type'] = ACTIVITY_OBJ_WIKI;
+	$arr['body'] = '[table][tr][td][h1]New Wiki[/h1][/td][/tr][tr][td][zrl=' . $wiki_url . ']' . $wiki['htmlName'] . '[/zrl][/td][/tr][/table]';
+	// Save the path using iconfig. The file path should not be shared with other hubs
+	if (!set_iconfig($arr, 'wiki', 'path', $path, false)) {
+		return array('item' => null, 'success' => false);
+	}
+	// Save the wiki name information using iconfig. This is shareable.
+	if (!set_iconfig($arr, 'wiki', 'rawName', $wiki['rawName'], true)) {
+		return array('item' => null, 'success' => false);
+	}
+	if (!set_iconfig($arr, 'wiki', 'htmlName', $wiki['htmlName'], true)) {
+		return array('item' => null, 'success' => false);
+	}
+	if (!set_iconfig($arr, 'wiki', 'urlName', $wiki['urlName'], true)) {
+		return array('item' => null, 'success' => false);
+	}
+	$post = item_store($arr);
+	$item_id = $post['item_id'];
+
+	if ($item_id) {
+		proc_run('php', "include/notifier.php", "activity", $item_id);
+		return array('item' => $arr, 'success' => true);
+	} else {
+		return array('item' => null, 'success' => false);
+	}
+}
+
+function wiki_delete_wiki($resource_id) {
+
+	$w = wiki_get_wiki($resource_id);
+	$item = $w['wiki'];
+	if (!$item || !$w['path']) {
+		return array('item' => null, 'success' => false);
+	} else {
+		$drop = drop_item($item['id'], false, DROPITEM_NORMAL, true);
+		$pathdel = rrmdir($w['path']);
+		if ($pathdel) {
+			info('Wiki files deleted successfully');
+		}
+		return array('item' => $item, 'success' => (($drop === 1 && $pathdel) ? true : false));
+	}
+}
+
+function wiki_get_wiki($resource_id) {
+	$item = q("SELECT * FROM item WHERE resource_type = '%s' AND resource_id = '%s' AND item_deleted = 0 limit 1", 
+						dbesc(WIKI_ITEM_RESOURCE_TYPE), 
+						dbesc($resource_id)
+	);
+	if (!$item) {
+		return array('wiki' => null, 'path' => null);
+	} else {
+		$w = $item[0];	// wiki item table record
+		// Get wiki metadata
+		$rawName = get_iconfig($w, 'wiki', 'rawName');
+		$htmlName = get_iconfig($w, 'wiki', 'htmlName');
+		$urlName = get_iconfig($w, 'wiki', 'urlName');
+		$path = get_iconfig($w, 'wiki', 'path');
+		if (!realpath(__DIR__ . '/../' . $path)) {
+			return array('wiki' => null, 'path' => null);
+		}
+		// Path to wiki exists
+		$abs_path = realpath(__DIR__ . '/../' . $path);
+		return array( 'wiki' => $w, 
+									'path' => $abs_path, 
+									'rawName' => $rawName, 
+									'htmlName' => $htmlName, 
+									'urlName' => $urlName
+		);
+	}
+}
+
+function wiki_exists_by_name($uid, $urlName) {
+	$item = q("SELECT id,resource_id FROM item WHERE resource_type = '%s' AND title = '%s' AND uid = '%s' AND item_deleted = 0 limit 1", 
+						dbesc(WIKI_ITEM_RESOURCE_TYPE), 
+						dbesc(escape_tags(urldecode($urlName))), 
+						dbesc($uid)
+					);
+	if (!$item) {
+		return array('id' => null, 'resource_id' => null);
+	} else {
+		return array('id' => $item[0]['id'], 'resource_id' => $item[0]['resource_id']);
+	}
+}
+
+function wiki_get_permissions($resource_id, $owner_id, $observer_hash) {
+	// TODO: For now, only the owner can edit
+	$sql_extra = item_permissions_sql($owner_id, $observer_hash);
+	$r = q("SELECT * FROM item WHERE resource_type = '%s' AND resource_id = '%s' $sql_extra LIMIT 1",
+				dbesc(WIKI_ITEM_RESOURCE_TYPE), 
+        dbesc($resource_id)
+    );
+	
+	if (!$r) {
+		return array('read' => false, 'write' => false, 'success' => true);
+	} else {
+		$perms = get_all_perms($owner_id, $observer_hash);
+		// TODO: Create a new permission setting for wiki analogous to webpages. Until
+		// then, use webpage permissions
+		if (!$perms['write_pages']) {
+			$write = false;
+		} else {
+			$write = true;
+		}
+		return array('read' => true, 'write' => $write, 'success' => true);
+	}
+}
+
+function wiki_create_page($name, $resource_id) {
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('page' => null, 'wiki' => null, 'message' => 'Wiki not found.', 'success' => false);
+	}
+	$page = array('rawName' => $name, 'htmlName' => escape_tags($name), 'urlName' => urlencode(escape_tags($name)), 'fileName' => urlencode(escape_tags($name)).'.md');
+	$page_path = $w['path'] . '/' . $page['fileName'];
+	if (is_file($page_path)) {
+		return array('page' => null, 'wiki' => null, 'message' => 'Page already exists.', 'success' => false);
+	}
+	// Create the page file in the wiki repo
+	if(!touch($page_path)) {
+		return array('page' => null, 'wiki' => null, 'message' => 'Page file cannot be created.', 'success' => false);
+	} else {
+		return array('page' => $page, 'wiki' => $w, 'message' => '', 'success' => true);
+	}
+	
+}
+
+function wiki_get_page_content($arr) {
+	$pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+	$resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('content' => null, 'message' => 'Error reading wiki', 'success' => false);
+	}
+	$page_path = $w['path'].'/'.$pageUrlName.'.md';
+	if (is_readable($page_path) === true) {
+		if(filesize($page_path) === 0) {
+			$content = '';
+		} else {
+			$content = file_get_contents($page_path);
+			if(!$content) {
+				return array('content' => null, 'message' => 'Error reading page content', 'success' => false);
+			}
+		}		
+		// TODO: Check that the files are all text files
+		return array('content' => json_encode($content), 'message' => '', 'success' => true);
+	}
+}
+
+function wiki_page_history($arr) {
+	$pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+	$resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('history' => null, 'message' => 'Error reading wiki', 'success' => false);
+	}
+	$page_path = $w['path'].'/'.$pageUrlName.'.md';
+	if (!is_readable($page_path) === true) {
+		return array('history' => null, 'message' => 'Cannot read wiki page: ' . $page_path, 'success' => false);
+	}
+	$reponame = ((array_key_exists('title', $w['wiki'])) ? $w['wiki']['title'] : 'repo');
+	if($reponame === '') {
+		$reponame = 'repo';
+	}
+	$git = new GitRepo('', null, false, $w['wiki']['title'], $w['path']);
+	try {
+		$gitlog = $git->git->log('', $page_path , array('limit' => 500));
+		return array('history' => $gitlog, 'message' => '', 'success' => true);
+	} catch (\PHPGit\Exception\GitException $e) {
+		 return array('history' => null, 'message' => 'GitRepo error thrown', 'success' => false);
+	}	
+}
+
+function wiki_save_page($arr) {
+	$pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+	$content = ((array_key_exists('content',$arr)) ? $arr['content'] : '');
+	$resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('message' => 'Error reading wiki', 'success' => false);
+	}
+	$page_path = $w['path'].'/'.$pageUrlName.'.md';
+	if (is_writable($page_path) === true) {
+		if(!file_put_contents($page_path, $content)) {
+			return array('message' => 'Error writing to page file', 'success' => false);
+		}
+		return array('message' => '', 'success' => true);
+	} else {
+		return array('message' => 'Page file not writable', 'success' => false);
+	}	
+}
+
+function wiki_delete_page($arr) {
+	$pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+	$resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('message' => 'Error reading wiki', 'success' => false);
+	}
+	$page_path = $w['path'].'/'.$pageUrlName.'.md';
+	if (is_writable($page_path) === true) {
+		if(!unlink($page_path)) {
+			return array('message' => 'Error deleting page file', 'success' => false);
+		}
+		return array('message' => '', 'success' => true);
+	} else {
+		return array('message' => 'Page file not writable', 'success' => false);
+	}	
+}
+
+function wiki_revert_page($arr) {
+	$pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+	$resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+	$commitHash = ((array_key_exists('commitHash',$arr)) ? $arr['commitHash'] : null);
+	if (! $commitHash) {
+		return array('content' => $content, 'message' => 'No commit has provided', 'success' => false);
+	}
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('content' => $content, 'message' => 'Error reading wiki', 'success' => false);
+	}
+	$page_path = $w['path'].'/'.$pageUrlName.'.md';
+	if (is_writable($page_path) === true) {
+		
+		$reponame = ((array_key_exists('title', $w['wiki'])) ? urlencode($w['wiki']['title']) : 'repo');
+		if($reponame === '') {
+			$reponame = 'repo';
+		}
+		$git = new GitRepo($observer['xchan_addr'], null, false, $w['wiki']['title'], $w['path']);
+		$content = null;
+		try {
+			$git->setIdentity($observer['xchan_name'], $observer['xchan_addr']);
+			foreach ($git->git->tree($commitHash) as $object) {
+				if ($object['type'] == 'blob' && $object['file'] === $pageUrlName.'.md' ) {
+						$content = $git->git->cat->blob($object['hash']);						
+				}
+			}
+		} catch (\PHPGit\Exception\GitException $e) {
+			json_return_and_die(array('content' => $content, 'message' => 'GitRepo error thrown', 'success' => false));
+		}
+		return array('content' => $content, 'message' => '', 'success' => true);
+	} else {
+		return array('content' => $content, 'message' => 'Page file not writable', 'success' => false);
+	}
+}
+
+function wiki_git_commit($arr) {
+	$files = ((array_key_exists('files', $arr)) ? $arr['files'] : null);
+	$commit_msg = ((array_key_exists('commit_msg', $arr)) ? $arr['commit_msg'] : 'Repo updated');
+	$resource_id = ((array_key_exists('resource_id', $arr)) ? $arr['resource_id'] : json_return_and_die(array('message' => 'Wiki resource_id required for git commit', 'success' => false)));
+	$observer = ((array_key_exists('observer', $arr)) ? $arr['observer'] : json_return_and_die(array('message' => 'Observer required for git commit', 'success' => false)));
+	$w = wiki_get_wiki($resource_id);
+	if (!$w['path']) {
+		return array('message' => 'Error reading wiki', 'success' => false);
+	}
+	$reponame = ((array_key_exists('title', $w['wiki'])) ? urlencode($w['wiki']['title']) : 'repo');
+	if($reponame === '') {
+		$reponame = 'repo';
+	}
+	$git = new GitRepo($observer['xchan_addr'], null, false, $w['wiki']['title'], $w['path']);
+	try {
+		$git->setIdentity($observer['xchan_name'], $observer['xchan_addr']);
+		if ($files === null) {
+			$options = array('all' => true); // git commit option to include all changes
+		} else {
+			$options = array(); // git commit options
+			foreach ($files as $file) {
+				if (!$git->git->add($file)) {	// add specified files to the git repo stage
+					if (!$git->git->reset->hard()) {
+						json_return_and_die(array('message' => 'Error adding file to git stage: ' . $file . '. Error resetting git repo.', 'success' => false));
+					}
+					json_return_and_die(array('message' => 'Error adding file to git stage: ' . $file, 'success' => false));
+				}
+			}
+		}
+		if ($git->commit($commit_msg, $options)) {
+			json_return_and_die(array('message' => 'Wiki repo commit succeeded', 'success' => true));
+		} else {
+			json_return_and_die(array('message' => 'Wiki repo commit failed', 'success' => false));
+		}
+	} catch (\PHPGit\Exception\GitException $e) {
+		json_return_and_die(array('message' => 'GitRepo error thrown', 'success' => false));
+	}
+}
+
+function wiki_generate_page_filename($name) {
+	$file = urlencode(escape_tags($name));
+	if( $file === '') {
+		return null;
+	} else {
+		return $file . '.md';
+	}	
+}
\ No newline at end of file