Change a bit the source code organisation

1 files changed, 27 insertions, 0 deletions

diff --git a/src/png.py b/src/png.py
new file mode 100644
index 0000000..377682e
--- /dev/null
+++ b/src/png.py
@@ -0,0 +1,27 @@
+import subprocess
+import json
+
+import cairo
+
+from . import abstract
+
+class PNGParser(abstract.AbstractParser):
+    mimetypes = {'image/png', }
+    meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
+            'Directory', 'FileSize', 'FileModifyDate', 'FileAccessDate',
+            "FileInodeChangeDate", 'FilePermissions', 'FileType',
+            'FileTypeExtension', 'MIMEType', 'ImageWidth', 'BitDepth', 'ColorType',
+            'Compression', 'Filter', 'Interlace', 'BackgroundColor', 'ImageSize',
+            'Megapixels', 'ImageHeight'}
+
+    def get_meta(self):
+        out = subprocess.check_output(['exiftool', '-json', self.filename])
+        meta = json.loads(out.decode('utf-8'))[0]
+        for key in self.meta_whitelist:
+            meta.pop(key, None)
+        return meta
+
+    def remove_all(self):
+        surface = cairo.ImageSurface.create_from_png(self.filename)
+        surface.write_to_png(self.output_filename)
+        return True