Move every image-related parser into a single file

src/images.py

@@ -0,0 +1,72 @@
+import subprocess
+import json
+import os
+
+import cairo
+
+import gi
+gi.require_version('GdkPixbuf', '2.0')
+from gi.repository import GdkPixbuf
+
+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
+
+class GdkPixbufAbstractParser(abstract.AbstractParser):
+    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):
+        _, extension = os.path.splitext(self.filename)
+        pixbuf = GdkPixbuf.Pixbuf.new_from_file(self.filename)
+        if extension == '.jpg':
+            extension = '.jpeg'
+        pixbuf.savev(self.output_filename, extension[1:], ["quality"], ["100"])
+        return True
+
+
+class JPGParser(GdkPixbufAbstractParser):
+    mimetypes = {'image/jpg'}
+    meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
+            'Directory', 'FileSize', 'FileModifyDate', 'FileAccessDate',
+            "FileInodeChangeDate", 'FilePermissions', 'FileType',
+            'FileTypeExtension', 'MIMEType', 'ImageWidth',
+            'ImageSize', 'BitsPerSample', 'ColorComponents', 'EncodingProcess',
+            'JFIFVersion', 'ResolutionUnit', 'XResolution', 'YCbCrSubSampling',
+            'YResolution', 'Megapixels', 'ImageHeight'}
+
+
+class TiffParser(GdkPixbufAbstractParser):
+    mimetypes = {'image/tiff'}
+    meta_whitelist = {'Compression', 'ExifByteOrder', 'ExtraSamples',
+            'FillOrder', 'PhotometricInterpretation', 'PlanarConfiguration',
+            'RowsPerStrip', 'SamplesPerPixel', 'StripByteCounts',
+            'StripOffsets', 'BitsPerSample', 'Directory', 'ExifToolVersion',
+            'FileAccessDate', 'FileInodeChangeDate', 'FileModifyDate',
+            'FileName', 'FilePermissions', 'FileSize', 'FileType',
+            'FileTypeExtension', 'ImageHeight', 'ImageSize', 'ImageWidth',
+            'MIMEType', 'Megapixels', 'SourceFile'}
+