Add history page with thumbnails of images

Signed-off-by: Florian Pritz <bluewind@xinu.at>

5 files changed, 212 insertions, 0 deletions

diff --git a/application/controllers/file.php b/application/controllers/file.php
index 630e550de..78ecd5096 100644
--- a/application/controllers/file.php
+++ b/application/controllers/file.php
@@ -380,6 +380,68 @@ class File extends CI_Controller {
 		echo $this->config->item('upload_max_size');
 	}
 
+	function thumbnail()
+	{
+		$id = $this->uri->segment(3);
+
+		if (!$this->mfile->valid_id($id)) {
+			return $this->_non_existent();
+		}
+
+		$etag = "$id-thumb";
+		handle_etag($etag);
+
+		$thumb = $this->mfile->makeThumb($id, 150, IMAGETYPE_JPEG);
+
+		if ($thumb === false) {
+			show_error("Failed to generate thumbnail");
+		}
+
+		$filedata = $this->mfile->get_filedata($id);
+		if (!$filedata) {
+			show_error("Failed to get file data");
+		}
+
+		$this->output->set_header("Cache-Control:max-age=31536000, public");
+		$this->output->set_header("Expires: ".date("r", time() + 365 * 24 * 60 * 60));
+		$this->output->set_content_type("image/jpeg");
+		$this->output->set_output($thumb);
+	}
+
+	function upload_history_thumbnails()
+	{
+		$this->muser->require_access();
+
+		$user = $this->muser->get_userid();
+
+		$query = $this->db->query("
+			SELECT `id`, `filename`, `mimetype`, `date`, `hash`, `filesize`
+			FROM files
+			WHERE user = ?
+			AND mimetype IN ('image/jpeg', 'image/png', 'image/gif')
+			ORDER BY date ASC
+			", array($user))->result_array();
+
+		foreach($query as $key => $item) {
+			$filesize = format_bytes($item["filesize"]);
+			$dimensions = $this->mfile->image_dimension($this->mfile->file($item["hash"]));
+			$upload_date = date("r", $item["date"]);
+
+			$query[$key]["filesize"] = $filesize;
+			$query[$key]["tooltip"] = "
+				${item["id"]} - $filesize<br>
+				$upload_date
+				$dimensions - ${item["mimetype"]}<br>
+				";
+		}
+
+		$this->data["query"] = $query;
+
+		$this->load->view('header', $this->data);
+		$this->load->view($this->var->view_dir.'/upload_history_thumbnails', $this->data);
+		$this->load->view('footer', $this->data);
+	}
+
 	function upload_history()
 	{
 		$this->muser->require_access();
diff --git a/application/models/mfile.php b/application/models/mfile.php
index 7d6056a9c..a7bab5d51 100644
--- a/application/models/mfile.php
+++ b/application/models/mfile.php
@@ -101,6 +101,118 @@ class Mfile extends CI_Model {
 		return $mimetype;
 	}
 
+	public function image_dimension($file)
+	{
+		list($width, $height) = getimagesize($file);
+
+		return "${width}x${height}";
+	}
+
+	/*
+	 * This returns a square thumbnail for the input image
+	 * Source: http://salman-w.blogspot.co.at/2009/04/crop-to-fit-image-using-aspphp.html
+	 */
+	public function makeThumb($id, $size = 150, $target_type = null)
+	{
+		$filedata = $this->get_filedata($id);
+		if (!$filedata) {
+			return false;
+		}
+
+		$source_path = $this->file($filedata["hash"]);
+
+		list($source_width, $source_height, $source_type) = getimagesize($source_path);
+
+		if ($target_type === null) {
+			$target_type = $source_type;
+		}
+
+		$target_width = $size;
+		$target_height = $size;
+
+		switch ($source_type) {
+			case IMAGETYPE_GIF:
+				$source_gdim = imagecreatefromgif($source_path);
+				break;
+			case IMAGETYPE_JPEG:
+				$source_gdim = imagecreatefromjpeg($source_path);
+				break;
+			case IMAGETYPE_PNG:
+				$source_gdim = imagecreatefrompng($source_path);
+				break;
+			default:
+				show_error("Unsupported image type");
+		}
+
+		$source_aspect_ratio = $source_width / $source_height;
+		$desired_aspect_ratio = $target_width / $target_height;
+
+		if ($source_aspect_ratio > $desired_aspect_ratio) {
+			// Triggered when source image is wider
+			$temp_height = $target_height;
+			$temp_width = round(($target_height * $source_aspect_ratio));
+		} else {
+			// Triggered otherwise (i.e. source image is similar or taller)
+			$temp_width = $target_width;
+			$temp_height = round(($target_width / $source_aspect_ratio));
+		}
+
+		/*
+		 * Resize the image into a temporary GD image
+		 */
+
+		$temp_gdim = imagecreatetruecolor($temp_width, $temp_height);
+		imagecopyresampled(
+			$temp_gdim,
+			$source_gdim,
+			0, 0,
+			0, 0,
+			$temp_width, $temp_height,
+			$source_width, $source_height
+		);
+
+		/*
+		 * Copy cropped region from temporary image into the desired GD image
+		 */
+
+		$x0 = ($temp_width - $target_width) / 2;
+		$y0 = ($temp_height - $target_height) / 2;
+		$thumb = imagecreatetruecolor($target_width, $target_height);
+		imagecopy(
+			$thumb,
+			$temp_gdim,
+			0, 0,
+			$x0, $y0,
+			$target_width, $target_height
+		);
+
+		ob_start();
+		switch ($target_type) {
+			case IMAGETYPE_GIF:
+				$ret = imagegif($thumb);
+				break;
+			case IMAGETYPE_JPEG:
+				$ret = imagejpeg($thumb);
+				break;
+			case IMAGETYPE_PNG:
+				$ret = imagepng($thumb);
+				break;
+			default:
+				assert(0);
+		}
+		$result = ob_get_clean();
+
+		if (!$ret) {
+			show_error("Failed to create thumbnail");
+		}
+
+		imagedestroy($thumb);
+		imagedestroy($temp_gdim);
+		imagedestroy($source_gdim);
+
+		return $result;
+	}
+
 	// Add a hash to the DB
 	function add_file($hash, $id, $filename)
 	{
diff --git a/application/views/file/nav_history.php b/application/views/file/nav_history.php
new file mode 100644
index 000000000..1a3e55c0b
--- /dev/null
+++ b/application/views/file/nav_history.php
@@ -0,0 +1,18 @@
+<ul class="nav nav-tabs">
+<?php
+$nav = array(
+	"List" => "file/upload_history",
+	"Thumbnails" => "file/upload_history_thumbnails",
+);
+
+$CI =& get_instance();
+
+foreach ($nav as $key => $item) {
+	?>
+		<li <?php echo $CI->uri->uri_string() == $item ? 'class="active"' : ''; ?>>
+			<a href="<?php echo site_url($item); ?>"><?php echo $key; ?></a>
+		</li>
+	<?php
+}
+?>
+</ul>
diff --git a/application/views/file/upload_history.php b/application/views/file/upload_history.php
index 8e030d360..344afc28a 100644
--- a/application/views/file/upload_history.php
+++ b/application/views/file/upload_history.php
@@ -1,4 +1,5 @@
 <?php register_js_include("/data/js/jquery.tablesorter.min.js"); ?>
+<?php include 'nav_history.php'; ?>
 <?php echo form_open("file/do_delete") ?>
     <table id="upload_history" class="table table-striped tablesorter">
         <thead>
diff --git a/application/views/file/upload_history_thumbnails.php b/application/views/file/upload_history_thumbnails.php
new file mode 100644
index 000000000..55ee90191
--- /dev/null
+++ b/application/views/file/upload_history_thumbnails.php
@@ -0,0 +1,19 @@
+<?php include 'nav_history.php'; ?>
+<!-- Comment markers background: http://stackoverflow.com/a/14776780/953022 -->
+<div class="upload_history_thumbnails"><!--
+	<?php foreach($query as $key => $item): ?>
+		--><a href="<?php echo site_url("/".$item["id"]); ?>" title="<?php echo htmlentities($item["filename"]); ?>" data-content="<?php echo htmlentities($item["tooltip"]); ?>" ><img class="thumb" src="<?php echo site_url("file/thumbnail/".$item["id"]); ?>"></a><!--
+	<?php endforeach; ?>
+--></div>
+
+<div class="row-fluid">
+	<div class="span12 alert alert-block alert-info">
+		<h4 class="alert-heading">Notice!</h4>
+		<p>
+		Currently only jpeg, png and gif images are displayed here. If you are
+		looking for something else, please switch to the
+		<a href="<?php echo site_url("file/upload_history"); ?>">list view</a>
+		which contains your complete history.
+		</p>
+	</div>
+</div>