get exif data directly from file if non was recorded during upload

1 files changed, 46 insertions, 11 deletions

diff --git a/lib/exif.php b/lib/exif.php
index 1b6c2cbd2..1bebb5fdc 100644
--- a/lib/exif.php
+++ b/lib/exif.php
@@ -1,14 +1,20 @@
 <?php
 include_once dirname(__FILE__) . "/tidypics.php";
 
-function td_get_exif(Elggfile $file) {
-	$my_file = str_replace("image", "", tp_get_img_dir()) . $file->getFilename();
-	$exif = exif_read_data($my_file);
+function td_get_exif($file_guid) {
+	$file = new ElggFile($file_guid);
+	$filename = $file->getFilenameOnFilestore();
+	$exif = exif_read_data($filename);
 	create_metadata($file->getGUID(), "tp_exif", serialize($exif), "string", $file->getObjectOwnerGUID(), 2);
 }
 
 function tp_exif_formatted($file_guid) {
 	$metadata_exif = get_metadata_byname($file_guid, "tp_exif");
+	if(!$metadata_exif) { //try to load it from the file if its not in the database
+		td_get_exif($file_guid);
+		$metadata_exif = get_metadata_byname($file_guid, "tp_exif");
+	}
+	
 	if($metadata_exif) {
 		$exif = unserialize($metadata_exif["value"]);
 		
@@ -16,18 +22,47 @@ function tp_exif_formatted($file_guid) {
 		//convert the raw values to understandible values
 		$Fnumber = explode("/", $exif['FNumber']);
 		$Fnumber = $Fnumber[0] / $Fnumber[1];
+		if(!$Fnumber) {
+			$Fnumber = "N/A";
+		} else {
+			$Fnumber = "f/$Fnumber";
+		}
+		
 		$Focal = explode("/", $exif['FocalLength']);
 		$Focal = $Focal[0] / $Focal[1];
+		if(!$Focal || round($Focal) == "0") $Focal = 0;
+		if(round($Focal) == 0) {
+			$Focal = "N/A";
+		} else {
+			$Focal = round($Focal) . "mm";
+		}
+
+		$model = $exif['Model'];
+		if(!$model) $model = "N/A";
+		
+		$exposure = $exif['ExposureTime'];
+		if(!$exposure) $exposure = "N/A";
+		
+		$iso = $exif['ISOSpeedRatings'];
+		if(!$iso) $iso = "N/A";
+		
+		$captured = $exif['DateTime'];
+		if(!$captured) $captured = "N/A";
 		
 		//prepare the text for return
-		$exif_text = "Model: ".$exif['Model']."<br>";
-		$exif_text .= "Shutter: ".$exif['ExposureTime']."<br>";
-		$exif_text .= "Aperture: f/".$Fnumber."<br>";
-		$exif_text .= "ISO Speed: ".$exif['ISOSpeedRatings']."<br>";
-		$exif_text .= "Focal Length: ".round($Focal)."mm<br>";
-		$exif_text .= "Captured: ". $exif['DateTime'];
-	
-		return "<tr><td>$exif_text</td></tr>";
+		
+		$exif_text = "Model: ".$model."<br>";
+		$exif_text .= "Shutter: ".$exposure."<br>";
+		$exif_text .= "Aperture: ".$Fnumber."<br>";
+		$exif_text .= "ISO Speed: ".$iso."<br>";
+		if(round($Focal) == 0) {
+			$exif_text .= "Focal Length: N/A<br>";
+		} else {
+			$exif_text .= "Focal Length: " . round($Focal) . "mm<br />";
+		}
+		$exif_text .= "Captured: ". $captured;
+		
+		return $exif_text;
 	} else {
 		return false;
 	}