Use generalized mappings to handle import

bookwyrm/importers/storygraph_import.py

@@ -1,6 +1,4 @@
-""" handle reading a csv from librarything """
-import re
-
+""" handle reading a csv from storygraph"""
 from . import Importer
 
 
@@ -8,26 +6,3 @@ class StorygraphImporter(Importer):
     """csv downloads from librarything"""
 
     service = "Storygraph"
-    # mandatory_fields : fields matching the book title and author
-    mandatory_fields = ["Title"]
-
-    def parse_fields(self, entry):
-        """custom parsing for storygraph"""
-        data = {}
-        data["import_source"] = self.service
-        data["Title"] = entry["Title"]
-        data["Author"] = entry["Authors"] if "Authors" in entry else entry["Author"]
-        data["ISBN13"] = entry["ISBN"]
-        data["My Review"] = entry["Review"]
-        if entry["Star Rating"]:
-            data["My Rating"] = float(entry["Star Rating"])
-        else:
-            data["My Rating"] = ""
-
-        data["Date Added"] = re.sub(r"[/]", "-", entry["Date Added"])
-        data["Date Read"] = re.sub(r"[/]", "-", entry["Last Date Read"])
-
-        data["Exclusive Shelf"] = (
-            {"read": "read", "currently-reading": "reading", "to-read": "to-read"}
-        ).get(entry["Read Status"], None)
-        return data