provide a generalised interface for thumbnail generators to support various content types

Zotlabs/Thumbs/Text.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Zotlabs\Thumbs;
+
+
+class Text {
+
+	function MatchDefault($type) {
+		return(($type === 'text') ? true : false );
+	}
+
+	function Thumb($attach,$preview_style,$height = 300, $width = 300) {
+
+		$stream = @fopen(dbunescbin($attach['content']),'rb');
+		if($stream) {
+			$content = trim(stream_get_contents($stream,4096));
+			$content = str_replace("\r",'',$content);
+			$content_a = explode("\n",$content);
+		}
+		if($content_a) {
+			$fsize = 4;
+			$lsize = 8;
+			$image = imagecreate($width,$height);
+			imagecolorallocate($image,255,255,255);
+			$colour = imagecolorallocate($image,0,0,0);
+			$border = imagecolorallocate($image,64,64,64);
+
+			$x1 = 0; 
+			$y1 = 0; 
+			$x2 = ImageSX($image) - 1; 
+			$y2 = ImageSY($image) - 1; 
+
+			for($i = 0; $i < 2; $i++) { 
+				ImageRectangle($image, $x1++, $y1++, $x2--, $y2--, $border); 
+			}
+
+			foreach($content_a as $l => $t) {
+				$l = $l + 1;
+				$x = 3;
+				$y = ($l * $lsize) + 3 - $fsize;
+				imagestring($image,1,$x,$y,$t,$colour);
+				if(($l * $lsize) >= $height) {
+					break;
+				}
+			}
+			imagejpeg($image,dbunescbin($attach['content']) . '.thumb');
+		}
+	}
+}