Implement delayed indexing. Fixes #66.

README.md

@@ -95,6 +95,7 @@ Key				| Value			| Explanation
 `logo_postition`| left|right	| The side of the site name at which the logo should be placed. Only has an effect if the above is not set to an empty string.
 `updateurl`		| url			| The url from which to fetch updates. Defaults to the master (development) branch. If there is sufficient demand, a separate stable branch will be created. Note that if you use the automatic updater currently it won't save your module choices. **MAKE SURE THAT THIS POINTS TO A *HTTPS* URL, OTHERWISE SOMEONE COULD INJECT A VIRUS INTO YOUR WIKI!**
 `sitesecret`	| string		| The secret key used to perform 'dangerous' actions, like updating the wiki. It is strongly advised that you change this!
+`delayed_indexing_time`	| integer | The amount of time, in seconds, that pages should be blocked from being indexed by search engines after their last edit. Set to 0 to disable. This is called delayed indexing. More information can be found [here](http://c2.com/cgi/wiki?DelayedIndexing).
 `editing`		| boolean		| Determines whether editing is enabled. Set to false to disable disting for all users (anonymous or otherwise).
 `maxpagesize`	| integer		| The maximum number of characters allowed on a single page. The default is 135,000 characters, which is about 50 pages.
 `clean_raw_html`| boolean		| Whether page sources should be cleaned of HTML before rendering. If set to true any raw HTML will be escaped before rendering. Note that this shouldn't affect code blocks - they should alwys be escaped. It is STRONGLY recommended that you keep this option turned on, **_ESPECIALLY_** if you allow anonymous edits as no sanitizing whatsoever is performed on the HTML. If you need a feature that the markdown parser doesn't have, please open an issue. Also note that some parsers may override this setting and escape HTML sequences anyway.

build/index.php

@@ -137,6 +137,10 @@ $settings->data_storage_dir = ".";
 // It is strongly advised that you change this!
 $settings->sitesecret = "ed420502615bac9037f8f12abd4c9f02";
 
+// The amount of time, in seconds, that pages should be blocked from being
+// indexed by search engines after their last edit. Aka delayed indexing.
+$settings->delayed_indexing_time = 0;
+
 
 ////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////// Navigation //////////////////////////////////
@@ -4256,6 +4260,12 @@ register_module([
 			
 			$content .= "\n\t\t<!-- Took " . (microtime(true) - $parsing_start) . " seconds to parse page source -->\n";
 			
+			// Prevent indexing of this page if it's still within the noindex
+			// time period
+			if(isset($settings->delayed_indexing_time) and
+				time() - $pageindex->{$env->page}->lastmodified < $settings->delayed_indexing_time)
+				header("x-robots-tag: noindex");
+			
 			// Content only mode: Sends only the raw rendered page
 			if(isset($_GET["contentonly"]) and $_GET["contentonly"] === "yes")
 				exit(parse_page_source($content));

module_index.json

@@ -176,7 +176,7 @@
         "author": "Starbeamrainbowlabs",
         "description": "Allows you to view pages. You really should include this one.",
         "id": "page-view",
-        "lastupdate": 1458906065,
+        "lastupdate": 1462012572,
         "optional": false
     },
     {

modules/page-view.php

@@ -102,6 +102,12 @@ register_module([
 			
 			$content .= "\n\t\t<!-- Took " . (microtime(true) - $parsing_start) . " seconds to parse page source -->\n";
 			
+			// Prevent indexing of this page if it's still within the noindex
+			// time period
+			if(isset($settings->delayed_indexing_time) and
+				time() - $pageindex->{$env->page}->lastmodified < $settings->delayed_indexing_time)
+				header("x-robots-tag: noindex");
+			
 			// Content only mode: Sends only the raw rendered page
 			if(isset($_GET["contentonly"]) and $_GET["contentonly"] === "yes")
 				exit(parse_page_source($content));

settings.fragment.php

@@ -134,6 +134,10 @@ $settings->data_storage_dir = ".";
 // It is strongly advised that you change this!
 $settings->sitesecret = "ed420502615bac9037f8f12abd4c9f02";
 
+// The amount of time, in seconds, that pages should be blocked from being
+// indexed by search engines after their last edit. Aka delayed indexing.
+$settings->delayed_indexing_time = 0;
+
 
 ////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////// Navigation //////////////////////////////////