<?php
register_module([
	"name" => "Help page",
	"version" => "0.9.3",
	"author" => "Starbeamrainbowlabs",
	"description" => "Adds a rather useful help page. Access through the 'help' action. This module also exposes help content added to Pepperminty Wiki's inbuilt invisible help section system.",
	"id" => "page-help",
	"code" => function() {
		global $settings;
		
		/**
		 * @api		{get}	?action=help[&dev=yes]	Get a help page
		 * @apiDescription	Get a customised help page. This page will be slightly different for every wiki, depending on their name, settings, and installed modules.
		 * @apiName		Help
		 * @apiGroup	Utility
		 * @apiPermission	Anonymous
		 *
		 * @apiParam	{string}	dev		Set to 'yes' to get a developer help page instead. The developer help page gives some general information about which modules and help page sections are registered, and other various (non-sensitive) settings.
		 */
		
		/*
		 * ██   ██ ███████ ██      ██████  
		 * ██   ██ ██      ██      ██   ██ 
		 * ███████ █████   ██      ██████  
		 * ██   ██ ██      ██      ██      
		 * ██   ██ ███████ ███████ ██      
		 */
		add_action("help", function() {
			global $env, $paths, $settings, $version, $help_sections, $actions;
			
			// Sort the help sections by key
			ksort($help_sections, SORT_NATURAL);
			
			if(isset($_GET["dev"]) and $_GET["dev"] == "yes")
			{
				$title = "Developers Help - $settings->sitename";
				$content = "<p>$settings->sitename runs on Pepperminty Wiki, an entire wiki packed into a single file. This page contains some information that developers may find useful.</p>
				<p>A full guide to developing a Pepperminty Wiki module can be found <a href='//github.com/sbrl/Pepperminty-Wiki/blob/master/Module_API_Docs.md#module-api-documentation'>on GitHub</a>.</p>
				<h3>Registered Help Sections</h3>
				<p>The following help sections are currently registered:</p>
				<table><tr><th>Index</th><th>Title</th><th>Length</th></tr>\n";
				$totalSize = 0;
				foreach($help_sections as $index => $section)
				{
					$sectionLength = strlen($section["content"]);
					$totalSize += $sectionLength;
					
					$content .= "\t\t\t<tr><td>$index</td><td>" . $section["title"] . "</td><td>" . human_filesize($sectionLength) . "</td></tr>\n";
				}
				$content .= "\t\t\t<tr><th colspan='2' style='text-align: right;'>Total:</th><td>" . human_filesize($totalSize) . "</td></tr>\n";
				$content .= "\t\t</table>\n";
				$content .= "<h3>Registered Actions</h3>";
				$registeredActions = array_keys(get_object_vars($actions));
				sort($registeredActions);
				$content .= "<p>The following actions are currently registered:</p>\n";
				$content .= "<p>" . implode(", ", $registeredActions) . "</p>";
				$content .= "<h3>Environment</h3>\n";
				$content .= "<ul>\n";
				$content .= "<li>$settings->sitename's root directory is " . (!is_writeable(__DIR__) ? "not " : "") . "writeable.</li>\n";
				$content .= "<li>The page index is currently " . human_filesize(filesize($paths->pageindex)) . " in size, and took " . $env->perfdata->pageindex_decode_time . "ms to decode.</li>";
				if(module_exists("feature-search"))
				{
					search::measure_invindex_load_time($paths->searchindex);
					$content .= "<li>The search index is currently " . human_filesize(filesize($paths->searchindex)) . " in size, and took " . $env->perfdata->searchindex_decode_time . "ms to decode.</li>";
				}
				
				$content .= "<li>The id index is currently " . human_filesize(filesize($paths->idindex)) . " in size, and took " . $env->perfdata->idindex_decode_time . "ms to decode.</li>";
				
				$content .= "</ul>\n";
				
				$content .= "<h3>Data</h3>\n";
				
				$wikiSize = new stdClass();
				$wikiSize->all = 0;
				$wikiSize->images = 0;
				$wikiSize->audio = 0;
				$wikiSize->videos = 0;
				$wikiSize->pages = 0;
				$wikiSize->history = 0;
				$wikiSize->indexes = 0;
				$wikiSize->other = 0;
				$wikiFiles = glob_recursive($env->storage_prefix . "*");
				foreach($wikiFiles as $filename)
				{
					$extension = strtolower(substr($filename, strrpos($filename, ".") + 1));
					if($extension === "php") continue; // Skip php files
					
					$nextFilesize = filesize($filename);
					$wikiSize->all += $nextFilesize;
					if($extension[0] === "r") // It's a revision of a page
						$wikiSize->history += $nextFilesize;
					else if($extension == "md") // It's a page
						$wikiSize->pages += $nextFilesize;
					else if($extension == "json") // It's an index
						$wikiSize->indexes += $nextFilesize;
					else if(in_array($extension, [ // It's an uploaded image
						"jpg", "jpeg", "png", "gif", "webp", "svg"
					]))
						$wikiSize->images += $nextFilesize;
					else if(in_array($extension, [ "mp3", "ogg", "wav", "aac", "m4a" ])) // It's an audio file
						$wikiSize->audio += $nextFilesize;
					else if(in_array($extension, [ "avi", "mp4", "m4v", "webm" ])) // It's a video file
						$wikiSize->videos += $nextFilesize;
					else
						$wikiSize->other += $nextFilesize;
				}
				
				$content .= "<p>$settings->sitename is currently " . human_filesize($wikiSize->all) . " in size.</p>\n";
				$content .= "<div class='stacked-bar'>
					<div class='stacked-bar-part' style='flex: $wikiSize->indexes; background: hsla(191, 100%, 41%, 0.6)'>Indexes: " . human_filesize($wikiSize->indexes) . "</div>
					<div class='stacked-bar-part' style='flex: $wikiSize->pages; background: hsla(112, 83%, 40%, 0.6)'>Pages: " . human_filesize($wikiSize->pages) . "</div>
					<div class='stacked-bar-part' style='flex: $wikiSize->history; background: hsla(116, 84%, 25%, 0.68)'>Page History: " . human_filesize($wikiSize->history) . "</div>
					<div class='stacked-bar-part' style='flex: $wikiSize->images; background: hsla(266, 88%, 47%, 0.6)'>Images: " . human_filesize($wikiSize->images) . "</div>\n";
				if($wikiSize->audio > 0)
					$content .= "<div class='stacked-bar-part' style='flex: $wikiSize->audio; background: hsla(237, 68%, 38%, 0.64)'>Audio: " . human_filesize($wikiSize->audio) . "</div>\n";
				if($wikiSize->videos > 0)
					$content .= "<div class='stacked-bar-part' style='flex: $wikiSize->videos; background: hsla(338, 79%, 54%, 0.64)'>Videos: " . human_filesize($wikiSize->videos) . "</div>\n";
				if($wikiSize->other > 0)
				$content .= "<div class='stacked-bar-part' style='flex: $wikiSize->other; background: hsla(62, 55%, 90%, 0.6)'>Other: " . human_filesize($wikiSize->other) . "</div>\n";
				$content .= "</div>";
			}
			else
			{
				$title = "Help - $settings->sitename";
				
				$content = "	<h1>$settings->sitename Help</h1>
		<p>Welcome to $settings->sitename!</p>
		<p>$settings->sitename is powered by Pepperminty Wiki, a complete wiki in a box you can drop into your server and expect it to just <em>work</em>.</p>";
				
				// Todo Insert a table of contents here?
				
				foreach($help_sections as $index => $section)
				{
					// Todo add a button that you can click to get a permanent link
					// to this section.
					$content .= "<h2 id='$index' class='help-section-header'>" . $section["title"] . "</h2>\n";
					$content .= $section["content"] . "\n";
				}
			}
			
			exit(page_renderer::render_main($title, $content));
		});
		
		// Register a help section on general navigation
		add_help_section("5-navigation", "Navigating", "<p>All the navigation links can be found on the top bar, along with a search box (if your site administrator has enabled it). There is also a &quot;More...&quot; menu in the top right that contains some additional links that you may fine useful.</p>
		<p>This page, along with the credits page, can be found on the bar at the bottom of every page.</p>");
		
		add_help_section("1-extra", "Extra Information", "<p>You can find out whch version of Pepperminty Wiki $settings->sitename is using by visiting the <a href='?action=credits'>credits</a> page.</p>
		<p>Information for developers can be found on <a href='?action=help&dev=yes'>this page</a>.</p>");
	}
]);

?>
