added quality options and fixed bugs

bin/checks.py

@@ -0,0 +1,41 @@
+class Checks:
+    def __init__(self):
+        self.custom_quality = 0.0
+        self.i_file_extension = ""
+
+    def perform(self, quality_selection, custom_quality, input_filepath, output_filepath):
+        # Call this function to perform entry checks.
+        # Returns True if all checks passed, False if one or more not passed.
+        if self.quality_checks(quality_selection, custom_quality) and self.file_checks(input_filepath, output_filepath):
+            return True
+        else:
+            return False
+
+    def quality_checks(self, quality_sel, custom_q):
+        if quality_sel != "Custom (will respect value below)":
+            return True
+        else:
+            try:
+                self.custom_quality = float(custom_q)
+            except ValueError:
+                return False
+            return True
+
+    def file_checks(self, i_fp, o_fp):
+        self.i_file_extension = str(i_fp)[len(i_fp) - 4:]
+        if self.i_file_extension == ".png" or self.i_file_extension == ".jpg":
+            pass
+        elif self.i_file_extension == "jpeg":
+            if str(i_fp)[len(i_fp) - 5:] == ".jpeg":
+                pass
+            else:
+                return False
+        elif self.i_file_extension == ".mp4" or self.i_file_extension == ".mkv":
+            pass
+        else:
+            return False
+
+        if str(i_fp)[len(i_fp) - 4:] == str(o_fp)[len(o_fp) - 4:]:
+            return True
+        else:
+            return False