text thumbnails in cloud tile mode

7 files changed, 150 insertions, 50 deletions

diff --git a/Zotlabs/Daemon/Thumbnail.php b/Zotlabs/Daemon/Thumbnail.php
new file mode 100644
index 000000000..aeea07410
--- /dev/null
+++ b/Zotlabs/Daemon/Thumbnail.php
@@ -0,0 +1,62 @@
+<?php /** @file */
+
+namespace Zotlabs\Daemon;
+
+
+class Thumbnail {
+
+	static public function run($argc,$argv) {
+
+		if(! $argc == 2)
+			return;
+
+		$c = q("select * from attach where hash = '%s' ",
+			dbesc($argv[1])
+		);
+
+		if(! $c)
+			return;
+
+		$preview_style = intval(get_config('system','thumbnail_security',0));
+
+		$attach = $c[0];
+		$isize = 300;
+		
+		if(strpos($attach['filetype'],'text/') !== false) {
+			$stream = @fopen($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;
+				$image = imagecreate($isize,$isize);
+				imagecolorallocate($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) >= $isize) {
+						break;
+					}
+				}
+				imagejpeg($image,$attach['content'] . '.thumb');
+			}
+		}
+	}
+}
\ No newline at end of file
diff --git a/Zotlabs/Storage/Browser.php b/Zotlabs/Storage/Browser.php
index 17b07ad82..dd3067cf8 100644
--- a/Zotlabs/Storage/Browser.php
+++ b/Zotlabs/Storage/Browser.php
@@ -208,6 +208,16 @@ class Browser extends DAV\Browser\Plugin {
 			$photo_icon = '';
 			$preview_style = intval(get_config('system','thumbnail_security',0));
 
+			$r = q("select content from attach where hash = '%s' and uid = %d limit 1",
+				dbesc($attachHash),
+				intval($owner)
+			);
+
+			if($r && file_exists(dbunescbin($r[0]['content']) . '.thumb')) {
+				$photo_icon = 'data:image/jpeg;base64,' . base64_encode(file_get_contents(dbunescbin($r[0]['content']) . '.thumb'));
+//				logger('found thumb: ' . $photo_icon);
+			}
+
 			if(strpos($type,'image/') === 0 && $attachHash) {
 				$r = q("select resource_id, imgscale from photo where resource_id = '%s' and imgscale in ( %d, %d ) order by imgscale asc limit 1",
 					dbesc($attachHash),
@@ -220,12 +230,11 @@ class Browser extends DAV\Browser\Plugin {
 				if($type === 'image/svg+xml' && $preview_style > 0) {
 					$photo_icon = $fullPath;
 				}
-
 			}
 
 			$g = [ 'resource_id' => $attachHash, 'thumbnail' => $photo_icon, 'security' => $preview_style ];
 			call_hooks('file_thumbnail', $g);
-			$photo_icon = $g['photo_icon'];
+			$photo_icon = $g['thumbnail'];
 
 
 			$attachIcon = ""; // "<a href=\"attach/".$attachHash."\" title=\"".$displayName."\"><i class=\"fa fa-arrow-circle-o-down\"></i></a>";
diff --git a/Zotlabs/Storage/Directory.php b/Zotlabs/Storage/Directory.php
index 27df3569f..45df9ddd5 100644
--- a/Zotlabs/Storage/Directory.php
+++ b/Zotlabs/Storage/Directory.php
@@ -362,6 +362,8 @@ class Directory extends DAV\Node implements DAV\ICollection, DAV\IQuota {
 			$args = array( 'resource_id' => $hash, 'album' => $album, 'os_syspath' => $f, 'os_path' => $xpath['os_path'], 'display_path' => $xpath['path'], 'filename' => $name, 'getimagesize' => $gis, 'directory' => $direct);
 			$p = photo_upload($c[0], \App::get_observer(), $args);
 		}
+		
+		\Zotlabs\Daemon\Master::Summon([ 'Thumbnail' , $this->folder_hash ]);
 
 		$sync = attach_export_data($c[0], $hash);
 
diff --git a/Zotlabs/Storage/File.php b/Zotlabs/Storage/File.php
index 8bf9997ed..37376c177 100644
--- a/Zotlabs/Storage/File.php
+++ b/Zotlabs/Storage/File.php
@@ -244,6 +244,9 @@ class File extends DAV\Node implements DAV\IFile {
 			}
 		}
 
+		\Zotlabs\Daemon\Master::Summon([ 'Thumbnail' , $this->data['hash'] ]);
+
+
 		$sync = attach_export_data($c[0],$this->data['hash']);
 
 		if($sync)
diff --git a/include/attach.php b/include/attach.php
index 0f07fe035..0f31ed012 100644
--- a/include/attach.php
+++ b/include/attach.php
@@ -951,6 +951,9 @@ function attach_store($channel, $observer_hash, $options = '', $arr = null) {
 		call_hooks('photo_upload_end', $ret);
 	}
 
+	\Zotlabs\Daemon\Master::Summon([ 'Thumbnail' , $hash ]);
+
+
 	if($dosync) {
 		$sync = attach_export_data($channel,$hash);
 
diff --git a/include/photo/photo_driver.php b/include/photo/photo_driver.php
index 21431e96f..f75ff2386 100644
--- a/include/photo/photo_driver.php
+++ b/include/photo/photo_driver.php
@@ -241,69 +241,84 @@ abstract class photo_driver {
 	}
 
 
+	/**
+	 * @brief reads exif data from filename
+	 */
 
+	public function exif($filename) {
 
-	public function orient($filename) {
 
-		/**
-		 * This function is a bit unusual, because it is operating on a file, but you must
-		 * first create an image from that file to initialise the type and check validity
-		 * of the image.
-		 */
-
-		if(! $this->is_valid())
+		if((! function_exists('exif_read_data')) 
+			|| (! in_array($this->getType(), [ 'image/jpeg' , 'image/tiff'] ))) {
 			return false;
+		}
 
-		if((! function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg'))
-			return false;
-
-		$exif = @exif_read_data($filename,null,true);
-
-		if($exif) {
-			$ort = $exif['IFD0']['Orientation'];
-
-			switch($ort)
-			{
-				case 1: // nothing
-					break;
+		/*
+		 * PHP 7.2 allows you to use a stream resource, which should reduce/avoid
+		 * memory exhaustion on large images. 
+		 */
 
-				case 2: // horizontal flip
-					$this->flip();
-					break;
+		if(version_compare(PHP_VERSION,'7.2.0') >= 0) {
+			$f = @fopen($filename,'rb');
+		}
+		else {
+			$f = $filename;
+		}
 
-				case 3: // 180 rotate left
-					$this->rotate(180);
-					break;
+		if($f) {
+			return @exif_read_data($f);
+		}
 
-				case 4: // vertical flip
-					$this->flip(false, true);
-					break;
+		return false;
+	}
 
-				case 5: // vertical flip + 90 rotate right
-					$this->flip(false, true);
-					$this->rotate(-90);
-					break;
+	/**
+	 * @brief orients current image based on exif orientation information
+	 */
 
-				case 6: // 90 rotate right
-					$this->rotate(-90);
-					break;
+	public function orient($exif) {
 
-				case 7: // horizontal flip + 90 rotate right
-					$this->flip();
-					$this->rotate(-90);
-					break;
+		if(! ($this->is_valid() && $exif)) {
+			return false;
+		}
 
-				case 8:	// 90 rotate left
-					$this->rotate(90);
-					break;
-			}
+		$ort = $exif['IFD0']['Orientation'];
 
-			return $exif;
+		if(! $ort) {
+			return false;
+		}
 
+		switch($ort) {
+			case 1: // nothing
+				break;
+			case 2: // horizontal flip
+				$this->flip();
+				break;
+			case 3: // 180 rotate left
+				$this->rotate(180);
+				break;
+			case 4: // vertical flip
+				$this->flip(false, true);
+				break;
+			case 5: // vertical flip + 90 rotate right
+				$this->flip(false, true);
+				$this->rotate(-90);
+				break;
+			case 6: // 90 rotate right
+				$this->rotate(-90);
+				break;
+			case 7: // horizontal flip + 90 rotate right
+				$this->flip();
+				$this->rotate(-90);
+				break;
+			case 8:	// 90 rotate left
+				$this->rotate(90);
+				break;
+			default:
+				break;
 		}
-		
-		return false;
 
+		return true;
 	}
 
 
diff --git a/include/photos.php b/include/photos.php
index 41a1d18cb..b1391f284 100644
--- a/include/photos.php
+++ b/include/photos.php
@@ -203,7 +203,13 @@ function photo_upload($channel, $observer, $args) {
 		return $ret;
 	}
 
-	$exif = $ph->orient(($args['os_syspath']) ? $args['os_syspath'] : $src);
+	// obtain exif data from the source file if present
+
+	$exif = $ph->exif(($args['os_syspath']) ? $args['os_syspath'] : $src);
+
+	if($exif) {
+		$ph->orient($exif);
+	}
 
 	@unlink($src);