Add new page to wiki and redirect to editor page.

3 files changed, 120 insertions, 13 deletions

diff --git a/Zotlabs/Module/Wiki.php b/Zotlabs/Module/Wiki.php
index 290c2e005..909b2c84d 100644
--- a/Zotlabs/Module/Wiki.php
+++ b/Zotlabs/Module/Wiki.php
@@ -49,18 +49,25 @@ class Wiki extends \Zotlabs\Web\Controller {
         'acl' => populate_acl($channel_acl),
         'bang' => ''
     );
-//		$wikiheader = t('Wiki Sandbox');
-//		$hide_editor = false;
+
+		$resource_id = '';
+		if(argc()>2) {
+			// Check if wiki exists andr redirect if it does not
+			$channel = get_channel_by_nick(argv(1));
+			$w = wiki_exists_by_name($channel['channel_id'], argv(2));
+			logger('wiki_Exists: ' . json_encode($w));
+			if(!$w['id']) {
+				goaway('/'.argv(0).'/'.argv(1));
+			} else {
+				$resource_id = $w['resource_id'];
+			}
+		}
 		if(argc()<3) {
 			$wikiheader = t('Wiki Sandbox');
 			$hide_editor = false;
 		} elseif (argc()<4) {
 			$wikiheader = 'Empty wiki: ' . rawurldecode(argv(2)); // show wiki name
-			$hide_editor = true;
-			// Check if wiki exists andr redirect if it does not
-			if(!wiki_exists_by_name(argv(2))['id']) {
-				goaway('/'.argv(0).'/'.argv(1));
-			}
+			$hide_editor = true;			
 		} elseif (argc()<5) {
 			$wikiheader = rawurldecode(argv(2)) . ': ' . rawurldecode(argv(3));	// show wiki name and page
 			$hide_editor = false;
@@ -70,6 +77,7 @@ class Wiki extends \Zotlabs\Web\Controller {
 			'$wikiheader' => $wikiheader,
 			'$hideEditor' => $hide_editor,
 			'$channel' => $channel['channel_address'],
+			'$resource_id' => $resource_id,
 			'$lockstate' => $x['lockstate'],
 			'$acl' => $x['acl'],
 			'$bang' => $x['bang'],
@@ -166,6 +174,43 @@ class Wiki extends \Zotlabs\Web\Controller {
 				json_return_and_die(array('success' => false));
 			}
 		}
+
+		// Create a page
+		if ((argc() === 4) && (argv(2) === 'create') && (argv(3) === 'page')) {
+			$which = argv(1);
+			$resource_id = $_POST['resource_id']; 
+			// Determine if observer has permission to create wiki
+			if (local_channel()) {
+				$channel = \App::get_channel();
+			} else {
+				$channel = get_channel_by_nick($which);
+				$observer_hash = get_observer_hash();
+				// Figure out who the page owner is.
+				$perms = get_all_perms(intval($channel['channel_id']), $observer_hash);
+				// TODO: Create a new permission setting for wiki analogous to webpages. Until
+				// then, use webpage permissions
+				if (!$perms['write_pages']) {
+					logger('Wiki editing permission denied.' . EOL);
+					json_return_and_die(array('success' => false));
+				}
+				$perms = wiki_get_permissions($resource_id, intval($channel['channel_id']), $observer_hash);
+				if(!$perms['write']) {
+					logger('Wiki write permission denied. Read only.' . EOL);
+					json_return_and_die(array('success' => false));					
+				}
+			}
+			$name = escape_tags(urlencode($_POST['name'])); //Get new wiki name
+			if($name === '') {				
+				json_return_and_die(array('message' => 'Error creating page. Invalid name.', 'success' => false));
+			}
+			$page = wiki_create_page($name . '.md', $resource_id);
+			if ($page['success']) {
+				json_return_and_die(array('url' => '/'.argv(0).'/'.argv(1).'/'.$page['wiki'].'/'.$name, 'success' => true));
+			} else {
+				logger('Error creating page');
+				json_return_and_die(array('message' => 'Error creating page.', 'success' => false));
+			}
+		}		
 		
 		notice('You must be authenticated.');
 		goaway('/wiki');
diff --git a/include/wiki.php b/include/wiki.php
index 90b30d492..317db1239 100644
--- a/include/wiki.php
+++ b/include/wiki.php
@@ -125,15 +125,58 @@ function wiki_delete_wiki($resource_id) {
     }
 }
 
-function wiki_exists_by_name($name) {
-		$item = q("SELECT id FROM item WHERE resource_type = '%s' AND title = '%s' AND item_deleted = 0 limit 1",
+function wiki_exists_by_name($uid, $name) {
+		$item = q("SELECT id,resource_id FROM item WHERE resource_type = '%s' AND title = '%s' AND uid = '%s' AND item_deleted = 0 limit 1",
             dbesc(WIKI_ITEM_RESOURCE_TYPE),
-            dbesc($name)
+            dbesc($name),
+						dbesc($uid)
     );
     if (!$item) {
-        return array('id' => null);   
+        return array('id' => null, 'resource_id' => null);   
     } else {
-			return array('id' => $item[0]['id']);   
+			return array('id' => $item[0]['id'], 'resource_id' => $item[0]['resource_id']);   
 		}
 	
-}
\ No newline at end of file
+}
+
+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(!$r) {
+		return array('read' => false, 'write' => false, 'success' => false);
+	} else {
+		return array('read' => true, 'write' => false, 'success' => true);
+	}
+}
+
+function wiki_create_page($name, $resource_id) {
+	$item = q("SELECT id,title,object FROM item WHERE resource_type = '%s' AND resource_id = '%s' AND item_deleted = 0 limit 1", 
+		dbesc(WIKI_ITEM_RESOURCE_TYPE), 
+		dbesc($resource_id)
+	);
+	if (!$item) {
+		return array('page' => null, 'message' => 'Wiki item not found.', 'success' => false);
+	}
+	$object = json_decode($item[0]['object'], true);
+	$wikiname = $item[0]['title'];
+	if (!realpath(__DIR__ . '/../' . $object['path'])) {
+		return array('page' => null, 'message' => 'Wiki directory does not exist.', 'success' => false);
+	}
+	// Path to wiki exists
+	$abs_path = realpath(__DIR__ . '/../' . $object['path']);
+	$page_path = $abs_path . '/' . $name;
+	if (is_file($page_path)) {
+		return array('page' => null, 'message' => 'Page already exists.', 'success' => false);
+	}
+	// Create file called $name in the path
+	if(!touch($page_path)) {
+		return array('page' => null, 'message' => 'Page file cannot be created.', 'success' => false);
+	} else {
+		return array('wiki' => $wikiname, 'message' => '', 'success' => true);
+	}
+	
+}
diff --git a/view/tpl/wiki.tpl b/view/tpl/wiki.tpl
index 652434c3e..b0824650c 100644
--- a/view/tpl/wiki.tpl
+++ b/view/tpl/wiki.tpl
@@ -76,6 +76,7 @@
 </div>
 
 <script>
+  window.wiki_resource_id = '{{$resource_id}}';
   $(document).ready(function () {
     // Show Edit tab first. Otherwise the Ace editor does not load.
     $("#wiki-nav-tabs li:eq(0) a").tab('show');
@@ -112,4 +113,22 @@ function wiki_delete_wiki(wikiName, resource_id) {
       }
     }, 'json');
 }
+
+
+  $('#new-page-submit').click(function (ev) {
+    if (window.wiki_resource_id === '') {
+      window.console.log('You must have a wiki open in order to create pages.');
+      ev.preventDefault();
+      return false;
+    }
+    $.post("wiki/{{$channel}}/create/page", {name: $('#id_pageName').val(), resource_id: window.wiki_resource_id}, 
+      function (data) {
+        if (data.success) {
+          window.location = data.url;
+        } else {
+          window.console.log('Error creating page.');
+        }
+      }, 'json');
+    ev.preventDefault();
+  });
 </script>