Extract image management code to a helper function

1 files changed, 105 insertions, 0 deletions

diff --git a/lib/imagefile.php b/lib/imagefile.php
new file mode 100644
index 000000000..f15a72c76
--- /dev/null
+++ b/lib/imagefile.php
@@ -0,0 +1,105 @@
+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Abstraction for an image file
+ *
+ * PHP version 5
+ *
+ * LICENCE: 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 <http://www.gnu.org/licenses/>.
+ *
+ * @category  Image
+ * @package   Laconica
+ * @author    Evan Prodromou <evan@controlyourself.ca>
+ * @author    Zach Copley <zach@controlyourself.ca>
+ * @copyright 2008-2009 Control Yourself, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://laconi.ca/
+ */
+
+if (!defined('LACONICA')) {
+    exit(1);
+}
+
+/**
+ * A wrapper on uploaded files
+ *
+ * Makes it slightly easier to accept an image file from upload.
+ *
+ * @category Image
+ * @package  Laconica
+ * @author   Evan Prodromou <evan@controlyourself.ca>
+ * @author   Zach Copley <zach@controlyourself.ca>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://laconi.ca/
+ */
+
+class ImageFile
+{
+    var $filename = null;
+    var $type = null;
+
+    function __construct($filename=null, $type=null)
+    {
+        $this->filename = $filename;
+        $this->type = $type;
+    }
+
+    static function fromUpload($param='upload')
+    {
+        switch ($_FILES[$param]['error']) {
+        case UPLOAD_ERR_OK: // success, jump out
+            break;
+        case UPLOAD_ERR_INI_SIZE:
+        case UPLOAD_ERR_FORM_SIZE:
+            throw new Exception(_('That file is too big.'));
+            return;
+        case UPLOAD_ERR_PARTIAL:
+            @unlink($_FILES[$param]['tmp_name']);
+            throw new Exception(_('Partial upload.'));
+            return;
+        default:
+            throw new Exception(_('System error uploading file.'));
+            return;
+        }
+
+        $imagefile = new ImageFile($_FILES[$param]['tmp_name']);
+        $info = @getimagesize($imagefile->filename);
+
+        if (!$info) {
+            @unlink($imagefile->filename);
+            throw new Exception(_('Not an image or corrupt file.'));
+            return;
+        }
+
+        switch ($info[2]) {
+        case IMAGETYPE_GIF:
+        case IMAGETYPE_JPEG:
+        case IMAGETYPE_PNG:
+            $imagefile->type = $info[2];
+            break;
+        default:
+            @unlink($imagefile->filename);
+            throw new Exception(_('Unsupported image file format.'));
+            return;
+        }
+
+        return $imagefile;
+    }
+
+    function unlink()
+    {
+        @unlink($this->filename);
+    }
+}
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