Use exempi-d instead of exiftool

dub.sdl

@@ -4,3 +4,4 @@ authors "Les De Ridder"
 copyright "Copyright © 2016, Les De Ridder"
 license "NCSA"
 dependency "dfuse" version="~>0.3.0"
+dependency "exempi-d" version="~>0.1.0"

dub.selections.json

@@ -1,6 +1,7 @@
 {
 	"fileVersion": 1,
 	"versions": {
-		"dfuse": {"path":"dfuse"}
+		"dfuse": {"path":"dfuse"},
+		"exempi-d": "0.1.0"
 	}
 }

source/tagproviders/dublincore.d

@@ -4,33 +4,71 @@ import std.process;
 import std.string;
 import std.algorithm;
 import std.array;
+import std.stdio;
+
+import exempi.xmp;
+import exempi.xmpconsts;
 
 import dtagfs.tagprovider;
 
 class DublinCoreTagProvider : TagProvider
 {
+	private XmpPtr _xmp;
+
 	override string[] getTags(string path)
 	{
 		//TODO: Make prefixes configurable
 
 		string[] tags;
 
-		tags ~= map!(a => a)(getElementData!"Subject"(path)).array;
-		tags ~= map!(a => "copyright:" ~ a)(getElementData!"Rights"(path)).array;
-		tags ~= map!(a => "relation:" ~ a)(getElementData!"Relation"(path)).array;
-		tags ~= map!(a => "type:" ~ a)(getElementData!"Type"(path)).array;
+		tags ~= getElementData!"subject"(path).map!(a => a).array;
+		tags ~= getElementData!"rights"(path).map!(a => "copyright:" ~ a).array;
+		tags ~= getElementData!"relation"(path).map!(a => "relation:" ~ a).array;
+		tags ~= getElementData!"type"(path).map!(a => "type:" ~ a).array;
 
 		return tags;
 	}
 
 	string[] getElementData(string element)(string path)
 	{
-		//TODO: Use a proper metadata library instead of exiftool
+		string[] data;
+
+		auto file = xmp_files_open_new(path.toStringz(), XmpOpenFileOptions.XMP_OPEN_READ);
+
+		xmp_files_get_xmp(file, _xmp);
+
+		auto iterator = xmp_iterator_new(_xmp, NS_DC.ptr, element, XmpIterOptions.XMP_ITER_JUSTLEAFNODES);
+
+		auto property = xmp_string_new();
+		while(xmp_iterator_next(iterator, null, null, property, null))
+		{
+			auto propertyString = fromStringz(xmp_string_cstr(property)).dup;
+			if(propertyString != "x-default")
+			{
+				data ~= propertyString.idup;
+			}
+		}
+		xmp_string_free(property);
+
+		xmp_iterator_free(iterator);
+
+		xmp_files_free(file);
 
-		auto exiftool = execute(["exiftool", "-b", "-" ~ element, path]);
-		auto rawData = exiftool.output;
+		return data;
+	}
+
+	this()
+	{
+		xmp_init();
+
+		_xmp = xmp_new_empty();
+	}
+
+	~this()
+	{
+		xmp_free(_xmp);
 
-		return splitLines(rawData);
+		xmp_terminate();
 	}
 
 	@property