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https://github.com/sbrl/Pepperminty-Wiki.git
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275 lines
13 KiB
PHP
275 lines
13 KiB
PHP
<?php
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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register_module([
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"name" => "Page History",
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"version" => "0.4.2",
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"author" => "Starbeamrainbowlabs",
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"description" => "Adds the ability to keep unlimited page history, limited only by your disk space. Note that this doesn't store file history (yet). Currently depends on feature-recent-changes for rendering of the history page.",
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"id" => "feature-history",
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"code" => function() {
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/**
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* @api {get} ?action=history&page={pageName}[&format={format}] Get a list of revisions for a page
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* @apiName History
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* @apiGroup Page
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* @apiPermission Anonymous
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*
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* @apiUse PageParameter
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* @apiParam {string} format The format to return the list of pages in. available values: html, json, text. Default: html
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*/
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/*
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* ██ ██ ██ ███████ ████████ ██████ ██████ ██ ██
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* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ███████ ██ ███████ ██ ██ ██ ██████ ████
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* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ██ ██ ██ ███████ ██ ██████ ██ ██ ██
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*/
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add_action("history", function() {
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global $settings, $env, $pageindex;
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$supported_formats = [ "html", "json", "text" ];
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$format = $_GET["format"] ?? "html";
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switch($format) {
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case "html":
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$content = "<h1>History for $env->page_safe</h1>\n";
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if(!empty($pageindex->{$env->page}->history))
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{
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$content .= "\t\t<ul class='page-list'>\n";
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foreach(array_reverse($pageindex->{$env->page}->history) as $revisionData)
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{
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// Only display edits & reverts for now
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if(!in_array($revisionData->type, [ "edit", "revert" ]))
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continue;
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// The number (and the sign) of the size difference to display
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$size_display = ($revisionData->sizediff > 0 ? "+" : "") . $revisionData->sizediff;
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$size_display_class = $revisionData->sizediff > 0 ? "larger" : ($revisionData->sizediff < 0 ? "smaller" : "nochange");
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if($revisionData->sizediff > 500 or $revisionData->sizediff < -500)
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$size_display_class .= " significant";
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$size_title_display = human_filesize($revisionData->newsize - $revisionData->sizediff) . " -> " . human_filesize($revisionData->newsize);
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$content .= "\t\t\t<li>";
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$content .= "<a href='?page=" . rawurlencode($env->page) . "&revision=$revisionData->rid'>#$revisionData->rid</a> " . render_editor(page_renderer::render_username($revisionData->editor)) . " " . render_timestamp($revisionData->timestamp) . " <span class='cursor-query $size_display_class' title='$size_title_display'>($size_display)</span>";
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if($env->is_logged_in || ($settings->history_revert_require_moderator && $env->is_admin && $env->is_logged_in))
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$content .= " <small>(<a class='revert-button' href='?action=history-revert&page=" . rawurlencode($env->page) . "&revision=$revisionData->rid'>restore this revision</a>)</small>";
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$content .= "</li>\n";
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}
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$content .= "\t\t</ul>";
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}
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else
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{
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$content .= "<p style='text-align: center;'><em>(None yet! Try editing this page and then coming back here.)</em></p>\n";
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}
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exit(page_renderer::render_main("$env->page - History - $settings->sitename", $content));
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case "json":
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$page_history = $pageindex->{$env->page}->history ?? [];
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foreach($page_history as &$history_entry) {
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unset($history_entry->filename);
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}
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header("content-type: application/json");
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exit(json_encode($page_history, JSON_PRETTY_PRINT));
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case "csv":
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$page_history = $pageindex->{$env->page}->history ?? [];
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header("content-type: text/csv");
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echo("revision_id,timestamp,type,editor,newsize,sizediff\n");
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foreach($page_history as $hentry) {
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echo("$hentry->rid,$hentry->timestamp,$hentry->type,$hentry->editor,$hentry->newsize,$hentry->sizediff\n");
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}
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exit();
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default:
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http_response_code(400);
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exit(page_renderer::render_main("Format Error - $env->page - History - $settings->sitename", "<p>The format <code>" . htmlentities($format) . "</code> isn't currently supported. Supported formats: html, json, csv"));
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}
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});
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/**
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* @api {get} ?action=history-revert&page={pageName}&revision={rid} Revert a page to a previous version
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* @apiName HistoryRevert
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* @apiGroup Editing
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* @apiPermission User
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* @apiUse PageParameter
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* @apiUse UserNotLoggedInError
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* @apiUse UserNotModeratorError
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*
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* @apiParam {string} revision The page revision number to revert to.
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*/
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/*
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* ██ ██ ██ ███████ ████████ ██████ ██████ ██ ██
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* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ███████ ██ ███████ ██ ██ ██ ██████ ████ █████
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* ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ██ ██ ██ ███████ ██ ██████ ██ ██ ██
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*
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* ██████ ███████ ██ ██ ███████ ██████ ████████
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* ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ██████ █████ ██ ██ █████ ██████ ██
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* ██ ██ ██ ██ ██ ██ ██ ██ ██
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* ██ ██ ███████ ████ ███████ ██ ██ ██
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*/
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add_action("history-revert", function() {
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global $env, $settings, $pageindex;
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if((!$env->is_admin && $settings->history_revert_require_moderator) ||
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!$env->is_logged_in) {
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http_response_code(401);
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exit(page_renderer::render_main("Unauthorised - $settings->sitename", "<p>You can't revert pages to a previous revision because " . ($settings->history_revert_require_moderator && $env->is_logged_in ? "you aren't logged in as a moderator. You can try <a href='?action=logout'>logging out</a> and then" : "you aren't logged in. You can try") . " <a href='?action=login&returnto=" . rawurlencode("?action=history-revert&revision={$env->history->revision_number}&page=" . rawurlencode($env->page)) . "'>logging in</a>.</p>"));
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}
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$current_revision_filepath = "$env->storage_prefix/{$pageindex->{$env->page}->filename}";
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// Figure out what we're saving
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$newsource = file_get_contents($env->page_filename); // The old revision content - the Pepperminty Wiki core sorts this out for us
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$oldsource = file_get_contents($current_revision_filepath); // The current revision's content
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// Save the old content over the current content
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file_put_contents($current_revision_filepath, $newsource);
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// NOTE: We don't run the save preprocessors here because they are run when a page is edited - reversion is special and requires different treatment.
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// FUTURE: We may want ot refactor the save preprocessor system ot take a single object instead - then we can add as many params as we like and we could execute the save preprocessors as normal :P
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// Add the old content as a new revision
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$result = history_add_revision(
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$pageindex->{$env->page},
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$newsource,
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$oldsource,
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true, // Yep, go ahead and save the page index
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"revert" // It's a revert, not an edit
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);
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// Update the redirect metadata, if the redirect module is installed
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if(module_exists("feature-redirect"))
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update_redirect_metadata($pageindex->{$env->page}, $newsource);
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// Add an entry to the recent changes log, if the module exists
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if($result !== false && module_exists("feature-recent-changes"))
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add_recent_change([
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"type" => "revert",
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"timestamp" => time(),
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"page" => $env->page,
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"user" => $env->user,
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"newsize" => strlen($newsource),
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"sizediff" => strlen($newsource) - strlen($oldsource)
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]);
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if($result === false) {
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http_response_code(503);
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exit(page_renderer::render_main("Server Error - Revert - $settings->sitename", "<p>A server error occurred when $settings->sitename tried to save the reversion of <code>$env->page_safe</code>. Please contact $settings->sitename's administrator $settings->admindetails_name, whose email address can be found at the bottom of every page (including this one).</p>"));
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}
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http_response_code(201);
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exit(page_renderer::render_main("Reverting $env->page - $settings->sitename", "<p>$env->page_safe has been reverted back to revision {$env->history->revision_number} successfully.</p>
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<p><a href='?page=" . rawurlencode($env->page) . "'>Go back</a> to the page, or continue <a href='?action=history&page = " . rawurlencode($env->page) . "'>reviewing its history</a>.</p>"));
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// $env->page_filename
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//
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});
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register_save_preprocessor("history_add_revision");
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if(module_exists("feature-stats")) {
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statistic_add([
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"id" => "history_most_revisions",
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"name" => "Most revised page",
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"type" => "scalar",
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"update" => function($old_stats) {
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global $pageindex;
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$target_pagename = "";
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$target_revisions = -1;
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foreach($pageindex as $pagename => $pagedata) {
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if(!isset($pagedata->history))
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continue;
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$revisions_count = count($pagedata->history);
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if($revisions_count > $target_revisions) {
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$target_revisions = $revisions_count;
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$target_pagename = $pagename;
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}
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}
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$result = new stdClass(); // completed, value, state
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$result->completed = true;
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$result->value = "(no revisions saved yet)";
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if($target_revisions > -1) {
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$result->value = "$target_revisions (<a href='?page=" . rawurlencode($target_pagename) . "'>" . htmlentities($target_pagename) . "</a>)";
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}
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return $result;
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}
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]);
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}
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}
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]);
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/**
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* Adds a history revision against a page.
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* Note: Does not update the current page content! This function _only_
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* records a new revision against a page name. Thus it is possible to have a
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* disparity between the history revisions and the actual content displayed in
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* the current revision if you're not careful!
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* @package feature-history
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* @param object $pageinfo The pageindex object of the page to operate on.
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* @param string $newsource The page content to save as the new revision.
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* @param string $oldsource The old page content that is the current revision (before the update).
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* @param bool $save_pageindex Whether the page index should be saved to disk.
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* @param string $change_type The type of change to record this as in the history revision log
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*/
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function history_add_revision(&$pageinfo, &$newsource, &$oldsource, $save_pageindex = true, $change_type = "edit") {
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global $env, $paths, $settings, $pageindex;
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if(!isset($pageinfo->history))
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$pageinfo->history = [];
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// Save the *new source* as a revision
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// This results in 2 copies of the current source, but this is ok
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// since any time someone changes something, it creates a new revision
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// Note that we can't save the old source here because we'd have no
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// clue who edited it since $pageinfo has already been updated by
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// this point
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// TODO Store tag changes here
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// Calculate the next revision id - we can't just count the revisions here because we might have a revision limit
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$nextRid = !empty($pageinfo->history) ? end($pageinfo->history)->rid + 1 : 0;
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$ridFilename = "$pageinfo->filename.r$nextRid";
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// Insert a new entry into the history
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$pageinfo->history[] = [
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"type" => $change_type, // We might want to store other types later (e.g. page moves)
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"rid" => $nextRid,
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"timestamp" => time(),
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"filename" => $ridFilename,
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"newsize" => strlen($newsource),
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"sizediff" => strlen($newsource) - strlen($oldsource),
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"editor" => $pageinfo->lasteditor
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];
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// Save the new source as a revision
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$result = file_put_contents("$env->storage_prefix$ridFilename", $newsource);
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if($result !== false &&
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$settings->history_max_revisions > -1) {
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while(count($pageinfo->history) > $settings->history_max_revisions) {
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// We've got too many revisions - trim one off & delete it
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$oldest_revision = array_shift($pageinfo->history);
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unlink("$env->storage_prefix/$oldest_revision->filename");
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}
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}
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// Save the edited pageindex
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if($result !== false && $save_pageindex)
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$result = save_pageindex();
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return $result;
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}
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?>
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