add storygraph import

bookwyrm/importers/__init__.py

@@ -3,3 +3,4 @@
 from .importer import Importer
 from .goodreads_import import GoodreadsImporter
 from .librarything_import import LibrarythingImporter
+from .storygraph_import import StorygraphImporter

bookwyrm/importers/storygraph_import.py

@@ -0,0 +1,32 @@
+""" handle reading a csv from librarything """
+import re
+import math
+
+from . import Importer
+
+
+class StorygraphImporter(Importer):
+    """csv downloads from librarything"""
+
+    service = "Storygraph"
+    # mandatory_fields : fields matching the book title and author
+    mandatory_fields = ["Title", "Author"]
+
+    def parse_fields(self, entry):
+        """custom parsing for storygraph"""
+        data = {}
+        data["import_source"] = self.service
+        data["Title"] = entry["Title"]
+        data["Author"] = entry["Author"]
+        data["ISBN13"] = entry["ISBN"]
+        data["My Review"] = entry["Review"]
+        if entry["Star Rating"]:
+            data["My Rating"] = math.ceil(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