Create Post/Tag/Remove module class and route

- Fix tag name parameter in single tag removal link in mod/photos
- Remove "/post" from backend routes as it was preventing sessions from working in this module. No existing module had a route starting with "/post".

mod/photos.php

@@ -1250,15 +1250,17 @@ function photos_content(App $a)
 		if (!empty($link_item['id'])) {
 			// parse tags and add links
 			$tag_arr = [];
-			foreach (Tag::getByURIId($link_item['uri-id']) as $tag) {
+			foreach (explode(',', Tag::getCSVByURIId($link_item['uri-id'])) as $tag_name) {
+				if ($tag_name) {
 					$tag_arr[] = [
-					'name' => $tag['name'],
-					'removeurl' => '/tagrm/' . $link_item['id'] . '/' . bin2hex($tag['name'])
+						'name'      => BBCode::toPlaintext($tag_name),
+						'removeurl' => 'post/' . $link_item['id'] . '/tag/remove/' . bin2hex($tag_name) . '?return=' . urlencode(DI::args()->getCommand()),
 					];
 				}
+			}
 			$tags = ['title' => DI::l10n()->t('Tags: '), 'tags' => $tag_arr];
 			if ($cmd === 'edit') {
-				$tags['removeanyurl'] = 'tagrm/' . $link_item['id'];
+				$tags['removeanyurl'] = 'post/' . $link_item['id'] . '/tag/remove?return=' . urlencode(DI::args()->getCommand());
 				$tags['removetitle'] = DI::l10n()->t('[Select tags to remove]');
 			}
 		}

src/App/Mode.php

@@ -68,7 +68,6 @@ class Mode
 		'objects',
 		'outbox',
 		'poco',
-		'post',
 		'pubsub',
 		'pubsubhubbub',
 		'receive',

src/Module/Post/Tag/Remove.php

@@ -0,0 +1,140 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Module\Post\Tag;
+
+use Friendica\App;
+use Friendica\Content\Text\BBCode;
+use Friendica\Core\L10n;
+use Friendica\Core\Renderer;
+use Friendica\Core\Session\Capability\IHandleUserSessions;
+use Friendica\Model\Post;
+use Friendica\Model\Tag;
+use Friendica\Module\Response;
+use Friendica\Util\Profiler;
+use Psr\Log\LoggerInterface;
+
+class Remove extends \Friendica\BaseModule
+{
+	/** @var IHandleUserSessions */
+	private $session;
+
+	public function __construct(IHandleUserSessions $session, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
+	{
+		parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
+
+		$this->session = $session;
+	}
+
+	protected function post(array $request = [])
+	{
+		if (!$this->session->getLocalUserId()) {
+			$this->baseUrl->redirect($request['return'] ?? '');
+		}
+
+
+		if (isset($request['cancel'])) {
+			$this->baseUrl->redirect($request['return'] ?? '');
+		}
+
+		$tags = [];
+		foreach ($request['tag'] ?? [] as $tag => $checked) {
+			if ($checked) {
+				$tags[] = hex2bin(trim($tag));
+			}
+		}
+
+		$this->removeTagsFromItem($this->parameters['item_id'], $tags);
+		$this->baseUrl->redirect($request['return'] ?? '');
+	}
+
+	protected function content(array $request = []): string
+	{
+		$returnUrl = $request['return'] ?? '';
+
+		if (!$this->session->getLocalUserId()) {
+			$this->baseUrl->redirect($returnUrl);
+		}
+
+		if (isset($this->parameters['tag_name'])) {
+			$this->removeTagsFromItem($this->parameters['item_id'], [trim(hex2bin($this->parameters['tag_name']))]);
+			$this->baseUrl->redirect($returnUrl);
+		}
+
+		$item_id = intval($this->parameters['item_id']);
+		if (!$item_id) {
+			$this->baseUrl->redirect($returnUrl);
+		}
+
+		$item = Post::selectFirst(['uri-id'], ['id' => $item_id, 'uid' => $this->session->getLocalUserId()]);
+		if (!$item) {
+			$this->baseUrl->redirect($returnUrl);
+		}
+
+		$tag_text = Tag::getCSVByURIId($item['uri-id']);
+
+		$tags = explode(',', $tag_text);
+		if (empty($tags)) {
+			$this->baseUrl->redirect($returnUrl);
+		}
+
+		$tag_checkboxes = array_map(function ($tag_text) {
+			return ['tag[' . bin2hex($tag_text) . ']', BBCode::toPlaintext($tag_text)];
+		}, $tags);
+
+		$tpl = Renderer::getMarkupTemplate('post/tag/remove.tpl');
+		return Renderer::replaceMacros($tpl, [
+			'$l10n' => [
+				'header' => $this->t('Remove Item Tag'),
+				'desc'   => $this->t('Select a tag to remove: '),
+				'remove' => $this->t('Remove'),
+				'cancel' => $this->t('Cancel'),
+			],
+
+			'$item_id'        => $item_id,
+			'$return'         => $returnUrl,
+			'$tag_checkboxes' => $tag_checkboxes,
+		]);
+	}
+
+	/**
+	 * @param int   $item_id
+	 * @param array $tags
+	 * @throws \Exception
+	 */
+	private function removeTagsFromItem(int $item_id, array $tags)
+	{
+		if (empty($item_id) || empty($tags)) {
+			return;
+		}
+
+		$item = Post::selectFirst(['uri-id'], ['id' => $item_id, 'uid' => $this->session->getLocalUserId()]);
+		if (empty($item)) {
+			return;
+		}
+
+		foreach ($tags as $tag) {
+			if (preg_match('~([#@!])\[url=([^\[\]]*)]([^\[\]]*)\[/url]~im', $tag, $results)) {
+				Tag::removeByHash($item['uri-id'], $results[1], $results[3], $results[2]);
+			}
+		}
+	}
+}

static/routes.config.php

@@ -531,6 +531,11 @@ return [
 	],
 
 	'/ping'              => [Module\Notifications\Ping::class, [R::GET]],
+
+	'/post' => [
+		'/{item_id}/tag/remove[/{tag_name}]'                       => [Module\Post\Tag\Remove::class, [R::GET, R::POST]],
+	],
+
 	'/pretheme'          => [Module\ThemeDetails::class, [R::GET]],
 	'/probe'             => [Module\Debug\Probe::class,  [R::GET]],
 

view/templates/post/tag/remove.tpl

@@ -0,0 +1,19 @@
+<div class="generic-page-wrapper">
+	<h3>{{$l10n.header}}</h3>
+
+	<p id="tag-remove-desc">{{$l10n.desc}}</p>
+
+	<form id="tagrm" action="post/{{$item_id}}/tag/remove?return={{$return}}" method="post">
+		<ul>
+{{foreach $tag_checkboxes as $tag_checkbox}}
+			<li>
+                {{include file="field_checkbox.tpl" field=$tag_checkbox}}
+			</li>
+{{/foreach}}
+		</ul>
+		<p>
+			<button type="submit" id="tagrm-submit" class="btn btn-primary" name="submit">{{$l10n.remove}}</button>
+			<button type="submit" id="tagrm-submit" class="btn" name="cancel">{{$l10n.cancel}}</button>
+		</p>
+	</form>
+</div>