controllers/Download.php

@@ -21,22 +21,30 @@ class Download
 		$tag = (int)$_GET['tag'];
 		$album = Tag::fromId($tag);
 
+		if (isset($_GET['by']) && ($user = Member::fromSlug($_GET['by'])) !== false)
+			$id_user_uploaded = $user->getUserId();
+		else
+			$id_user_uploaded = null;
+
 		if (isset($_SESSION['current_export']))
 			throw new UserFacingException('You can only export one album at the same time. Please wait until the other download finishes, or try again later.');
 
 		// So far so good?
-		$this->exportAlbum($album);
+		$this->exportAlbum($album, $id_user_uploaded);
 		exit;
 	}
 
-	private function exportAlbum(Tag $album)
+	private function exportAlbum(Tag $album, $id_user_uploaded)
 	{
 		$files = [];
 
 		$album_ids = array_merge([$album->id_tag], $this->getChildAlbumIds($album->id_tag));
 		foreach ($album_ids as $album_id)
 		{
-			$iterator = AssetIterator::getByOptions(['id_tag' => $album_id]);
+			$iterator = AssetIterator::getByOptions([
+				'id_tag' => $album_id,
+				'id_user_uploaded' => $id_user_uploaded,
+			]);
 			while ($asset = $iterator->next())
 				$files[] = join(DIRECTORY_SEPARATOR, [$asset->getSubdir(), $asset->getFilename()]);
 		}
@@ -71,6 +79,9 @@ class Download
 		// STDOUT should not block.
 		stream_set_blocking($pipes[1], 0);
 
+		// Allow this the download to take its time...
+		set_time_limit(0);
+
 		header('Pragma: no-cache');
 		header('Content-Description: File Download');
 		header('Content-disposition: attachment; filename="' . $album->tag . '.tar"');

controllers/ViewPhoto.php

@@ -46,6 +46,18 @@ class ViewPhoto extends HTMLController
 		if (isset($tag))
 			$page->setTag($tag);
 
+		// Keeping tabs on a filter?
+		if (isset($_GET['by']))
+		{
+			// Let's first verify that the filter is valid
+			$user = Member::fromSlug($_GET['by']);
+			if (!$user)
+				throw new UnexpectedValueException('Invalid filter for this album or tag.');
+
+			// Alright, let's run with it then
+			$page->setActiveFilter($user->getSlug());
+		}
+
 		$this->page->adopt($page);
 		$this->page->setCanonicalUrl($this->photo->getPageUrl());
 	}

controllers/ViewPhotoAlbum.php

@@ -26,60 +26,89 @@ class ViewPhotoAlbum extends HTMLController
 			$tag = Tag::fromSlug($_GET['tag']);
 			$id_tag = $tag->id_tag;
 			$title = $tag->tag;
-			$description = !empty($tag->description) ? $tag->description : '';
+			$header_box = $this->getHeaderBox($tag);
-
-			// Can we go up a level?
-			if ($tag->id_parent != 0)
-			{
-				$ptag = Tag::fromId($tag->id_parent);
-				$back_link = BASEURL . '/' . (!empty($ptag->slug) ? $ptag->slug . '/' : '');
-				$back_link_title = 'Back to "' . $ptag->tag . '"';
-			}
-			elseif ($tag->kind === 'Person')
-			{
-				$back_link = BASEURL . '/people/';
-				$back_link_title = 'Back to "People"';
-				$is_person = true;
-			}
-
-			$header_box = new AlbumHeaderBox($title, $description, $back_link, $back_link_title);
 		}
 		// View the album root.
 		else
 		{
 			$id_tag = 1;
+			$tag = Tag::fromId($id_tag);
 			$title = 'Albums';
 		}
 
 		// What page are we at?
-		$page = isset($_GET['page']) ? (int) $_GET['page'] : 1;
+		$current_page = isset($_GET['page']) ? (int) $_GET['page'] : 1;
 
-		parent::__construct($title . ' - Page ' . $page . ' - ' . SITE_TITLE);
+		parent::__construct($title . ' - Page ' . $current_page . ' - ' . SITE_TITLE);
 		if (isset($header_box))
 			$this->page->adopt($header_box);
 
-		// Can we do fancy things here?
+		// Who contributed to this album?
-		// !!! TODO: permission system?
+		$contributors = $tag->getContributorList();
-		$buttons = $this->getAlbumButtons($id_tag, $tag ?? null);
+
-		if (!empty($buttons))
+		// Enumerate possible filters
-			$this->page->adopt(new AlbumButtonBox($buttons));
+		$filters = [];
+		if (!empty($contributors))
+		{
+			$filters[''] = ['id_user' => null, 'label' => '', 'caption' => 'All photos',
+				'link' => $tag->getUrl()];
+
+			foreach ($contributors as $contributor)
+			{
+				$filters[$contributor['slug']] = [
+					'id_user' => $contributor['id_user'],
+					'label' => $contributor['first_name'],
+					'caption' => sprintf('By %s (%s photos)',
+						$contributor['first_name'], $contributor['num_assets']),
+					'link' => $tag->getUrl() . '?by=' . $contributor['slug'],
+				];
+			}
+		}
+
+		// Limit to a particular uploader?
+		$active_filter = '';
+		$id_user_uploaded = null;
+		if (!empty($_GET['by']))
+		{
+			if (!isset($filters[$_GET['by']]))
+				throw new UnexpectedValueException('Invalid filter for this album or tag.');
+
+			$active_filter = $_GET['by'];
+			$id_user_uploaded = $filters[$active_filter]['id_user'];
+			$filters[$active_filter]['is_active'] = true;
+		}
+
+		// Add an interface to query and modify the album/tag
+		$buttons = $this->getAlbumButtons($tag, $active_filter);
+		$button_strip = new AlbumButtonBox($buttons, $filters, $active_filter);
+		$this->page->adopt($button_strip);
 
 		// Fetch subalbums, but only if we're on the first page.
-		if ($page === 1)
+		if ($current_page === 1)
 		{
 			$albums = $this->getAlbums($id_tag);
 			$index = new AlbumIndex($albums);
 			$this->page->adopt($index);
 		}
 
+		// Are we viewing a person tag?
+		$is_person = $tag->kind === 'Person';
+
 		// Load a photo mosaic for the current tag.
-		list($mosaic, $total_count) = $this->getPhotoMosaic($id_tag, $page, !isset($is_person));
+		list($mosaic, $total_count) = $this->getPhotoMosaic($id_tag, $id_user_uploaded, $current_page, !$is_person);
 		if (isset($mosaic))
 		{
 			$index = new PhotosIndex($mosaic, Registry::get('user')->isAdmin());
 			$this->page->adopt($index);
-			if ($id_tag > 1)
+
-				$index->setUrlSuffix('?in=' . $id_tag);
+			$url_params = [];
+			if (isset($tag) && $tag->id_parent != 0)
+				$url_params['in'] = $tag->id_tag;
+			if (!empty($active_filter))
+				$url_params['by'] = $active_filter;
+
+			if (!empty($url_params))
+				$index->setUrlSuffix('?' . http_build_query($url_params));
 		}
 
 		// Make a page index as needed, while we're at it.
@@ -88,24 +117,24 @@ class ViewPhotoAlbum extends HTMLController
 			$index = new PageIndex([
 				'recordCount' => $total_count,
 				'items_per_page' => self::PER_PAGE,
-				'start' => (isset($_GET['page']) ? $_GET['page'] - 1 : 0) * self::PER_PAGE,
+				'start' => ($current_page - 1) * self::PER_PAGE,
-				'base_url' => BASEURL . '/' . (isset($_GET['tag']) ? $_GET['tag'] . '/' : ''),
+				'base_url' => $tag->getUrl(),
-				'page_slug' => 'page/%PAGE%/',
+				'page_slug' => 'page/%PAGE%/' . (!empty($active_filter) ? '?by=' . $active_filter : ''),
 				'index_class' => 'pagination-lg justify-content-around justify-content-lg-center',
 			]);
 			$this->page->adopt(new PageIndexWidget($index));
 		}
 
 		// Set the canonical url.
-		$this->page->setCanonicalUrl(BASEURL . '/' . (isset($_GET['tag']) ? $_GET['tag'] . '/' : '') .
+		$this->page->setCanonicalUrl($tag->getUrl() . ($current_page > 1 ? 'page/' . $current_page . '/' : ''));
-			($page > 1 ? 'page/' . $page . '/' : ''));
 	}
 
-	public function getPhotoMosaic($id_tag, $page, $sort_linear)
+	public function getPhotoMosaic($id_tag, $id_user_uploaded, $page, $sort_linear)
 	{
 		// Create an iterator.
 		list($this->iterator, $total_count) = AssetIterator::getByOptions([
 			'id_tag' => $id_tag,
+			'id_user_uploaded' => $id_user_uploaded,
 			'order' => 'date_captured',
 			'direction' => $sort_linear ? 'asc' : 'desc',
 			'limit' => self::PER_PAGE,
@@ -145,25 +174,26 @@ class ViewPhotoAlbum extends HTMLController
 		return $albums;
 	}
 
-	private function getAlbumButtons($id_tag, $tag)
+	private function getAlbumButtons(Tag $tag, $active_filter)
 	{
 		$buttons = [];
 		$user = Registry::get('user');
 
 		if ($user->isLoggedIn())
 		{
+			$suffix = !empty($active_filter) ? '&by=' . $active_filter : '';
 			$buttons[] = [
-				'url' => BASEURL . '/download/?tag=' . $id_tag,
+				'url' => BASEURL . '/download/?tag=' . $tag->id_tag . $suffix,
 				'caption' => 'Download album',
 			];
 		}
 
-		if (isset($tag))
+		if ($tag->id_parent != 0)
 		{
 			if ($tag->kind === 'Album')
 			{
 				$buttons[] = [
-					'url' => BASEURL . '/uploadmedia/?tag=' . $id_tag,
+					'url' => BASEURL . '/uploadmedia/?tag=' . $tag->id_tag,
 					'caption' => 'Upload photos here',
 				];
 			}
@@ -173,14 +203,14 @@ class ViewPhotoAlbum extends HTMLController
 				if ($tag->kind === 'Album')
 				{
 					$buttons[] = [
-						'url' => BASEURL . '/editalbum/?id=' . $id_tag,
+						'url' => BASEURL . '/editalbum/?id=' . $tag->id_tag,
 						'caption' => 'Edit album',
 					];
 				}
 				elseif ($tag->kind === 'Person')
 				{
 					$buttons[] = [
-						'url' => BASEURL . '/edittag/?id=' . $id_tag,
+						'url' => BASEURL . '/edittag/?id=' . $tag->id_tag,
 						'caption' => 'Edit tag',
 					];
 				}
@@ -190,7 +220,7 @@ class ViewPhotoAlbum extends HTMLController
 		if ($user->isAdmin() && (!isset($tag) || $tag->kind === 'Album'))
 		{
 			$buttons[] = [
-				'url' => BASEURL . '/addalbum/?tag=' . $id_tag,
+				'url' => BASEURL . '/addalbum/?tag=' . $tag->id_tag,
 				'caption' => 'Create subalbum',
 			];
 		}
@@ -198,6 +228,25 @@ class ViewPhotoAlbum extends HTMLController
 		return $buttons;
 	}
 
+	private function getHeaderBox(Tag $tag)
+	{
+		// Can we go up a level?
+		if ($tag->id_parent != 0)
+		{
+			$ptag = Tag::fromId($tag->id_parent);
+			$back_link = BASEURL . '/' . (!empty($ptag->slug) ? $ptag->slug . '/' : '');
+			$back_link_title = 'Back to "' . $ptag->tag . '"';
+		}
+		elseif ($tag->kind === 'Person')
+		{
+			$back_link = BASEURL . '/people/';
+			$back_link_title = 'Back to "People"';
+		}
+
+		$description = !empty($tag->description) ? $tag->description : '';
+		return new AlbumHeaderBox($tag->tag, $description, $back_link, $back_link_title);
+	}
+
 	public function __destruct()
 	{
 		if (isset($this->iterator))

models/Asset.php

@@ -697,65 +697,79 @@ class Asset
 			$params);
 	}
 
-	public function getUrlForPreviousInSet(?Tag $tag)
+	protected function getUrlForAdjacentInSet($prevNext, ?Tag $tag, $activeFilter)
 	{
-		$row = Registry::get('db')->queryAssoc('
+		$next = $prevNext === 'next';
-			SELECT a.*
+		$previous = !$next;
-			' . (isset($tag) ? '
-			FROM assets_tags AS t
-			INNER JOIN assets AS a ON a.id_asset = t.id_asset
-			WHERE t.id_tag = {int:id_tag} AND
-				(a.date_captured, a.id_asset) < ({datetime:date_captured}, {int:id_asset})
-			ORDER BY a.date_captured DESC, a.id_asset DESC'
-			: '
-			FROM assets AS a
-			WHERE (a.date_captured, a.id_asset) > ({datetime:date_captured}, {int:id_asset})
-			ORDER BY date_captured ASC, a.id_asset ASC')
-			 . '
-			LIMIT 1',
-			[
-				'id_asset' => $this->id_asset,
-				'id_tag' => isset($tag) ? $tag->id_tag : null,
-				'date_captured' => $this->date_captured,
-			]);
 
-		if ($row)
+		$where = [];
+		$params = [
+			'id_asset' => $this->id_asset,
+			'date_captured' => $this->date_captured,
+		];
+
+		// Direction depends on whether we're browsing a tag or timeline
+		if (isset($tag))
 		{
-			$obj = self::byRow($row, 'object');
+			$where[] = 't.id_tag = {int:id_tag}';
-			return $obj->getPageUrl() . ($tag ? '?in=' . $tag->id_tag : '');
+			$params['id_tag'] = $tag->id_tag;
+			$params['where_op'] = $previous ? '<' : '>';
+			$params['order_dir'] = $previous ? 'DESC' : 'ASC';
 		}
 		else
+		{
+			$params['where_op'] = $previous ? '>' : '<';
+			$params['order_dir'] = $previous ? 'ASC' : 'DESC';
+		}
+
+		// Take active filter into account as well
+		if (!empty($activeFilter) && ($user = Member::fromSlug($activeFilter)) !== false)
+		{
+			$where[] = 'id_user_uploaded = {int:id_user_uploaded}';
+			$params['id_user_uploaded'] = $user->getUserId();
+		}
+
+		// Use complete ordering when sorting the set
+		$where[] = '(a.date_captured, a.id_asset) {raw:where_op} ' .
+			'({datetime:date_captured}, {int:id_asset})';
+
+		// Stringify conditions together
+		$where = '(' . implode(') AND (', $where) . ')';
+
+		// Run query, leaving out tags table if not required
+		$row = Registry::get('db')->queryAssoc('
+			SELECT a.*
+			FROM assets AS a
+			' . (isset($tag) ? '
+			INNER JOIN assets_tags AS t ON a.id_asset = t.id_asset' : '') . '
+			WHERE ' . $where . '
+			ORDER BY a.date_captured {raw:order_dir}, a.id_asset {raw:order_dir}
+			LIMIT 1',
+			$params);
+
+		if (!$row)
 			return false;
+
+		$obj = self::byRow($row, 'object');
+
+		$urlParams = [];
+		if (isset($tag))
+			$urlParams['in'] = $tag->id_tag;
+		if (!empty($activeFilter))
+			$urlParams['by'] = $activeFilter;
+
+		$queryString = !empty($urlParams) ? '?' . http_build_query($urlParams) : '';
+
+		return $obj->getPageUrl() . $queryString;
 	}
 
-	public function getUrlForNextInSet(?Tag $tag)
+	public function getUrlForPreviousInSet(?Tag $tag, $activeFilter)
 	{
-		$row = Registry::get('db')->queryAssoc('
+		return $this->getUrlForAdjacentInSet('previous', $tag, $activeFilter);
-			SELECT a.*
+	}
-			' . (isset($tag) ? '
-			FROM assets_tags AS t
-			INNER JOIN assets AS a ON a.id_asset = t.id_asset
-			WHERE t.id_tag = {int:id_tag} AND
-				(a.date_captured, a.id_asset) > ({datetime:date_captured}, {int:id_asset})
-			ORDER BY a.date_captured ASC, a.id_asset ASC'
-			: '
-			FROM assets AS a
-			WHERE (a.date_captured, a.id_asset) < ({datetime:date_captured}, {int:id_asset})
-			ORDER BY date_captured DESC, a.id_asset DESC')
-			 . '
-			LIMIT 1',
-			[
-				'id_asset' => $this->id_asset,
-				'id_tag' => isset($tag) ? $tag->id_tag : null,
-				'date_captured' => $this->date_captured,
-			]);
 
-		if ($row)
+	public function getUrlForNextInSet(?Tag $tag, $activeFilter)
-		{
+	{
-			$obj = self::byRow($row, 'object');
+		return $this->getUrlForAdjacentInSet('next', $tag, $activeFilter);
-			return $obj->getPageUrl() . ($tag ? '?in=' . $tag->id_tag : '');
-		}
-		else
-			return false;
 	}
 }

models/AssetIterator.php

@@ -118,6 +118,11 @@ class AssetIterator extends Asset
 			else
 				$where[] = 'a.mimetype = {string:mime_type}';
 		}
+		if (isset($options['id_user_uploaded']))
+		{
+			$params['id_user_uploaded'] = $options['id_user_uploaded'];
+			$where[] = 'id_user_uploaded = {int:id_user_uploaded}';
+		}
 		if (isset($options['id_tag']))
 		{
 			$params['id_tag'] = $options['id_tag'];

models/PageIndex.php

@@ -155,24 +155,20 @@ class PageIndex
 
 	public function getLink($start = null, $order = null, $dir = null)
 	{
-		$url = $this->base_url;
+		$page = !is_string($start) ? ($start / $this->items_per_page) + 1 : $start;
-		$amp = strpos($this->base_url, '?') ? '&' : '?';
+		$url = $this->base_url . str_replace('%PAGE%', $page, $this->page_slug);
 
-		if (!empty($start))
+		$urlParams = [];
-		{
-			$page = $start !== '%d' ? ($start / $this->items_per_page) + 1 : $start;
-			$url .= strtr($this->page_slug, ['%PAGE%' => $page, '%AMP%' => $amp]);
-			$amp = '&';
-		}
 		if (!empty($order))
-		{
+			$urlParams['order'] = $order;
-			$url .= $amp . 'order=' . $order;
-			$amp = '&';
-		}
 		if (!empty($dir))
+			$urlParams['dir'] = $dir;
+
+		if (!empty($urlParams))
 		{
-			$url .= $amp . 'dir=' . $dir;
+			$queryString = (strpos($uri, '?') !== false ? '&' : '?');
-			$amp = '&';
+			$queryString .= http_build_query($urlParams);
+			$url .= $queryString;
 		}
 
 		return $url;

models/Tag.php

@@ -141,6 +141,21 @@ class Tag
 			return $rows;
 	}
 
+	public function getContributorList()
+	{
+		return Registry::get('db')->queryPairs('
+			SELECT u.id_user, u.first_name, u.surname, u.slug, COUNT(*) AS num_assets
+			FROM assets_tags AS at
+			LEFT JOIN assets AS a ON at.id_asset = a.id_asset
+			LEFT JOIN users AS u ON a.id_user_uploaded = u.id_user
+			WHERE at.id_tag = {int:id_tag}
+			GROUP BY a.id_user_uploaded
+			ORDER BY u.first_name, u.surname',
+			[
+				'id_tag' => $this->id_tag,
+			]);
+	}
+
 	public static function getPeople($id_parent = 0, $offset = 0, $limit = 24, $return_format = 'array')
 	{
 		$rows = Registry::get('db')->queryAssocs('

models/User.php

@@ -75,6 +75,11 @@ abstract class User
 		return $this->ip_address;
 	}
 
+	public function getSlug()
+	{
+		return $this->slug;
+	}
+
 	/**
 	 * Returns whether user is logged in.
 	 */

public/css/default.css

@@ -339,9 +339,11 @@ div.polaroid a {
 ---------------------*/
 .album_button_box {
 	float: right;
+	display: flex;
 	margin-bottom: 3rem;
 }
-.album_button_box > a {
+.album_button_box > a,
+.album_button_box .btn {
 	background: var(--bs-body-bg);
 	box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
 	border-color: var( --bs-secondary-bg);
@@ -349,7 +351,9 @@ div.polaroid a {
 	padding: 8px 10px;
 	margin-left: 12px;
 }
-.album_button_box > a:hover {
+.album_button_box > a:hover,
+.album_button_box .btn:hover,
+.album_button_box .btn:focus {
 	background: var(--bs-secondary-bg);
 	border-color: var(--bs-tertiary-bg);
 	color: var(--bs-secondary-color);

templates/AlbumButtonBox.php

@@ -8,11 +8,15 @@
 
 class AlbumButtonBox extends Template
 {
+	private $active_filter;
 	private $buttons;
+	private $filters;
 
-	public function __construct($buttons)
+	public function __construct(array $buttons, array $filters, $active_filter)
 	{
+		$this->active_filter = $active_filter;
 		$this->buttons = $buttons;
+		$this->filters = $filters;
 	}
 
 	public function html_main()
@@ -24,6 +28,39 @@ class AlbumButtonBox extends Template
 			echo '
 				<a class="btn btn-light" href="', $button['url'], '">', $button['caption'], '</a>';
 
+		if (!empty($this->filters))
+		{
+			echo '
+				<div class="dropdown">
+					<button class="btn btn-light dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">
+						<i class="bi bi-filter"></i>';
+
+			if ($this->active_filter)
+			{
+				echo '
+						<span class="badge text-bg-danger">',
+							$this->filters[$this->active_filter]['label'], '</span>';
+			}
+
+			echo '
+					</button>
+					<ul class="dropdown-menu">';
+
+			foreach ($this->filters as $key => $filter)
+			{
+				$is_active = $key === $this->active_filter;
+				echo '
+						<li><a class="dropdown-item', $is_active ? ' active' : '',
+							'" href="', $filter['link'], '">',
+							$filter['caption'],
+							'</a></li>';
+			}
+
+			echo '
+					</ul>
+				</div>';
+		}
+
 		echo '
 			</div>';
 	}

templates/PhotoPage.php

@@ -8,6 +8,7 @@
 
 class PhotoPage extends Template
 {
+	private $activeFilter;
 	private $photo;
 	private $metaData;
 	private $tag;
@@ -78,6 +79,11 @@ class PhotoPage extends Template
 				</a>';
 	}
 
+	public function setActiveFilter($filter)
+	{
+		$this->activeFilter = $filter;
+	}
+
 	public function setTag(Tag $tag)
 	{
 		$this->tag = $tag;
@@ -85,14 +91,14 @@ class PhotoPage extends Template
 
 	private function photoNav()
 	{
-		if ($previousUrl = $this->photo->getUrlForPreviousInSet($this->tag))
+		if ($previousUrl = $this->photo->getUrlForPreviousInSet($this->tag, $this->activeFilter))
 			echo '
 				<a href="', $previousUrl, '#photo_frame" id="previous_photo"><i class="bi bi-arrow-left"></i></a>';
 		else
 			echo '
 				<span id="previous_photo"><i class="bi bi-arrow-left"></i></span>';
 
-		if ($nextUrl = $this->photo->getUrlForNextInSet($this->tag))
+		if ($nextUrl = $this->photo->getUrlForNextInSet($this->tag, $this->activeFilter))
 			echo '
 				<a href="', $nextUrl, '#photo_frame" id="next_photo"><i class="bi bi-arrow-right"></i></a>';
 		else