Add minimum artwork dimensions

lib/Artwork.php

@@ -365,7 +365,13 @@ class Artwork extends PropertiesBase{
 			}
 
 			if(!is_uploaded_file($uploadedFile['tmp_name'])){
-				throw new Exceptions\InvalidImageUploadException();
+				$error->Add(new Exceptions\InvalidImageUploadException());
+			}
+
+			// Check for minimum dimensions
+			list($imageWidth, $imageHeight) = getimagesize($uploadedFile['tmp_name']);
+			if(!$imageWidth || !$imageHeight || $imageWidth < COVER_ARTWORK_IMAGE_MINIMUM_WIDTH || $imageHeight < COVER_ARTWORK_IMAGE_MINIMUM_HEIGHT){
+				$error->Add(new Exceptions\ArtworkImageDimensionsTooSmallException());
 			}
 		}
 

lib/Constants.php

@@ -44,6 +44,8 @@ const COVER_ARTWORK_STATUS_IN_USE = 'in_use';
 const COVER_ARTWORK_STATUS_UNVERIFIED = 'unverified';
 const COVER_ARTWORK_MAX_STRING_LENGTH = 191;
 const COVER_ARTWORK_MAX_TAGS = 100;
+const COVER_ARTWORK_IMAGE_MINIMUM_WIDTH = 300;
+const COVER_ARTWORK_IMAGE_MINIMUM_HEIGHT = 300;
 const SORT_COVER_ARTWORK_CREATED_NEWEST = 'created-newest';
 const SORT_COVER_ARTIST_ALPHA = 'artist-alpha';
 const SORT_COVER_ARTWORK_COMPLETED_NEWEST = 'completed-newest';

lib/Exceptions/ArtworkImageDimensionsTooSmallException.php

@@ -0,0 +1,11 @@
+<?
+namespace Exceptions;
+
+class ArtworkImageDimensionsTooSmallException extends AppException{
+	protected $message;
+
+	// This has to be initialized in a constructor because we use the number_format() function.
+	public function __construct(){
+		$this->message = 'Image dimensions are too small. The minimum image size is ' . number_format(COVER_ARTWORK_IMAGE_MINIMUM_WIDTH) . ' × ' . number_format(COVER_ARTWORK_IMAGE_MINIMUM_HEIGHT) . '.';
+	}
+}

www/artworks/new.php

@@ -137,7 +137,7 @@ catch(Exceptions\InvalidPermissionsException){
 				</label>
 				<label>
 					<span>High-resolution image</span>
-					<span>jpg, bmp, png, and tiff are accepted; 32MB max.</span>
+					<span>jpg, bmp, png, and tiff are accepted; <?= number_format(COVER_ARTWORK_IMAGE_MINIMUM_WIDTH) ?> × <?= number_format(COVER_ARTWORK_IMAGE_MINIMUM_HEIGHT) ?> minimum; 32MB max.</span>
 					<input
 						type="file"
 						name="artwork-image"