Use generalized mappings to handle import

bookwyrm/importers/goodreads_import.py

@@ -7,10 +7,3 @@ class GoodreadsImporter(Importer):
     For a more complete example of overriding see librarything_import.py"""
 
     service = "Goodreads"
-
-    def parse_fields(self, entry):
-        """handle the specific fields in goodreads csvs"""
-        entry.update({"import_source": self.service})
-        # add missing 'Date Started' field
-        entry.update({"Date Started": None})
-        return entry

bookwyrm/importers/importer.py

@@ -1,5 +1,6 @@
 """ handle reading a csv from an external service, defaults are from Goodreads """
 import csv
+from dataclasses import dataclass
 import logging
 
 from django.utils import timezone
@@ -18,30 +19,59 @@ class Importer:
     service = "Unknown"
     delimiter = ","
     encoding = "UTF-8"
-    mandatory_fields = ["Title", "Author"]
+
+    # these are from Goodreads
+    row_mappings_guesses = {
+        "id": ["id", "book id"],
+        "title": ["title"],
+        "authors": ["author", "authors", "primary author"],
+        "isbn_13": ["isbn13", "isbn"],
+        "isbn_10": ["isbn10", "isbn"],
+        "shelf": ["shelf", "exclusive shelf", "read status"],
+        "review_name": [],
+        "review_body": ["my review"],
+        "rating": ["my rating", "rating", "star rating"],
+        "date_added": ["date added", "entry date", "added"],
+        "date_started": ["date started", "started"],
+        "date_finished": ["date finished", "last date read", "date read", "finished"],
+    }
 
     def create_job(self, user, csv_file, include_reviews, privacy):
         """check over a csv and creates a database entry for the job"""
+        csv_reader = csv.DictReader(csv_file, delimiter=self.delimiter)
+        rows = enumerate(list(csv_reader))
         job = ImportJob.objects.create(
-            user=user, include_reviews=include_reviews, privacy=privacy
+            user=user,
+            include_reviews=include_reviews,
+            privacy=privacy,
+            mappings=self.create_row_mappings(csv_reader.fieldnames),
         )
-        for index, entry in enumerate(
-            list(csv.DictReader(csv_file, delimiter=self.delimiter))
-        ):
-            if not all(x in entry for x in self.mandatory_fields):
-                raise ValueError("Author and title must be in data.")
-            entry = self.parse_fields(entry)
-            self.save_item(job, index, entry)
+
+        for index, entry in rows:
+            print(index, entry)
+            self.create_item(job, index, entry)
         return job
 
-    def save_item(self, job, index, data):  # pylint: disable=no-self-use
-        """creates and saves an import item"""
-        ImportItem(job=job, index=index, data=data).save()
+    def create_row_mappings(self, headers):
+        """guess what the headers mean"""
+        mappings = {}
+        for (key, guesses) in self.row_mappings_guesses.items():
+            value = [h for h in headers if h.lower() in guesses]
+            value = value[0] if len(value) else None
+            if value:
+                headers.remove(value)
+            mappings[key] = value
+        return mappings
 
-    def parse_fields(self, entry):
-        """updates csv data with additional info"""
-        entry.update({"import_source": self.service})
-        return entry
+    def create_item(self, job, index, data):
+        """creates and saves an import item"""
+        print(data)
+        normalized = self.normalize_row(data, job.mappings)
+        ImportItem(job=job, index=index, data=data, normalized_data=normalized).save()
+
+    def normalize_row(self, entry, mappings):  # pylint: disable=no-self-use
+        """use the dataclass to create the formatted row of data"""
+        return {k: entry.get(v) for k, v in mappings.items()}
 
     def create_retry_job(self, user, original_job, items):
         """retry items that didn't import"""
@@ -49,10 +79,13 @@ class Importer:
             user=user,
             include_reviews=original_job.include_reviews,
             privacy=original_job.privacy,
+            # TODO: allow users to adjust mappings
+            mappings=original_job.mappings,
             retry=True,
         )
         for item in items:
-            self.save_item(job, item.index, item.data)
+            # this will re-normalize the raw data
+            self.create_item(job, item.index, item.data)
         return job
 
     def start_import(self, job):
@@ -156,3 +189,23 @@ def handle_imported_book(source, user, item, include_reviews, privacy):
             )
         # only broadcast this review to other bookwyrm instances
         review.save(software="bookwyrm")
+
+
+@dataclass
+class ImportEntry:
+    """data extracted from a line in a csv"""
+
+    title: str
+    authors: str = None
+    isbn_13: str = None
+    isbn_10: str = None
+    shelf: str = None
+    review_name: str = None
+    review_rating: float = None
+    review_body: str = None
+    review_cw: str = None
+    rating: float = None
+    date_added: str = None
+    date_started: str = None
+    date_finished: str = None
+    import_source: str = "Unknown"

bookwyrm/importers/librarything_import.py

@@ -1,7 +1,4 @@
-""" handle reading a csv from librarything """
-import re
-import math
-
+""" handle reading a tsv from librarything """
 from . import Importer
 
 
@@ -11,32 +8,3 @@ class LibrarythingImporter(Importer):
     service = "LibraryThing"
     delimiter = "\t"
     encoding = "ISO-8859-1"
-    # mandatory_fields : fields matching the book title and author
-    mandatory_fields = ["Title", "Primary Author"]
-
-    def parse_fields(self, entry):
-        """custom parsing for librarything"""
-        data = {}
-        data["import_source"] = self.service
-        data["Book Id"] = entry["Book Id"]
-        data["Title"] = entry["Title"]
-        data["Author"] = entry["Primary Author"]
-        data["ISBN13"] = entry["ISBN"]
-        data["My Review"] = entry["Review"]
-        if entry["Rating"]:
-            data["My Rating"] = math.ceil(float(entry["Rating"]))
-        else:
-            data["My Rating"] = ""
-        data["Date Added"] = re.sub(r"\[|\]", "", entry["Entry Date"])
-        data["Date Started"] = re.sub(r"\[|\]", "", entry["Date Started"])
-        data["Date Read"] = re.sub(r"\[|\]", "", entry["Date Read"])
-
-        data["Exclusive Shelf"] = None
-        if data["Date Read"]:
-            data["Exclusive Shelf"] = "read"
-        elif data["Date Started"]:
-            data["Exclusive Shelf"] = "reading"
-        else:
-            data["Exclusive Shelf"] = "to-read"
-
-        return data

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

bookwyrm/models/import_job.py

@@ -35,6 +35,7 @@ class ImportJob(models.Model):
     created_date = models.DateTimeField(default=timezone.now)
     task_id = models.CharField(max_length=100, null=True)
     include_reviews = models.BooleanField(default=True)
+    mappings = models.JSONField()
     complete = models.BooleanField(default=False)
     privacy = models.CharField(
         max_length=255, default="public", choices=PrivacyLevels.choices
@@ -48,6 +49,7 @@ class ImportItem(models.Model):
     job = models.ForeignKey(ImportJob, on_delete=models.CASCADE, related_name="items")
     index = models.IntegerField()
     data = models.JSONField()
+    normalized_data = models.JSONField()
     book = models.ForeignKey(Book, on_delete=models.SET_NULL, null=True, blank=True)
     book_guess = models.ForeignKey(
         Book,
@@ -98,55 +100,59 @@ class ImportItem(models.Model):
     @property
     def title(self):
         """get the book title"""
-        return self.data["title"]
+        return self.normalized_data["title"]
 
     @property
     def author(self):
         """get the book's authors"""
-        return self.data["authors"]
+        return self.normalized_data["authors"]
 
     @property
     def isbn(self):
         """pulls out the isbn13 field from the csv line data"""
-        return unquote_string(self.data["isbn_13"])
+        return unquote_string(self.normalized_data["isbn_13"])
 
     @property
     def shelf(self):
         """the goodreads shelf field"""
-        return self.data.get("shelf")
+        return self.normalized_data.get("shelf")
 
     @property
     def review(self):
         """a user-written review, to be imported with the book data"""
-        return self.data["review_body"]
+        return self.normalized_data["review_body"]
 
     @property
     def rating(self):
         """x/5 star rating for a book"""
-        if self.data.get("rating"):
-            return float(self.data["rating"])
+        if self.normalized_data.get("rating"):
+            return float(self.normalized_data["rating"])
         return None
 
     @property
     def date_added(self):
         """when the book was added to this dataset"""
-        if self.data.get("date_added"):
-            return timezone.make_aware(dateutil.parser.parse(self.data["date_added"]))
+        if self.normalized_data.get("date_added"):
+            return timezone.make_aware(
+                dateutil.parser.parse(self.normalized_data["date_added"])
+            )
         return None
 
     @property
     def date_started(self):
         """when the book was started"""
-        if self.data.get("date_started"):
-            return timezone.make_aware(dateutil.parser.parse(self.data["date_started"]))
+        if self.normalized_data.get("date_started"):
+            return timezone.make_aware(
+                dateutil.parser.parse(self.normalized_data["date_started"])
+            )
         return None
 
     @property
     def date_read(self):
         """the date a book was completed"""
-        if self.data.get("date_finished"):
+        if self.normalized_data.get("date_finished"):
             return timezone.make_aware(
-                dateutil.parser.parse(self.data["date_finished"])
+                dateutil.parser.parse(self.normalized_data["date_finished"])
             )
         return None
 
@@ -177,8 +183,12 @@ class ImportItem(models.Model):
 
     def __repr__(self):
         # pylint: disable=consider-using-f-string
-        return "<{!r}Item {!r}>".format(self.data["import_source"], self.data["title"])
+        return "<{!r}Item {!r}>".format(
+            self.normalized_data["import_source"], self.normalized_data["title"]
+        )
 
     def __str__(self):
         # pylint: disable=consider-using-f-string
-        return "{} by {}".format(self.data["title"], self.data["authors"])
+        return "{} by {}".format(
+            self.normalized_data["title"], self.normalized_data["authors"]
+        )

bookwyrm/tests/data/generic.csv

@@ -1,5 +1,5 @@
-id,title,author,ISBN,rating,shelf,review,added
-38,Gideon the Ninth (The Locked Tomb #1),Tamsyn Muir,"9781250313195",,read,,2021-11-10
-48,Harrow the Ninth (The Locked Tomb #2),Tamsyn Muir,,3,read,,2021-11-10
+id,title,author,ISBN,rating,shelf,review,added,finished
+38,Gideon the Ninth,Tamsyn Muir,"9781250313195",,read,,2021-11-10,2021-11-11
+48,Harrow the Ninth,Tamsyn Muir,,3,read,,2021-11-10
 23,Subcutanean,Aaron A. Reed,,,read,,2021-11-10
-10,Patisserie at Home,Mélanie Dupuis,"9780062445315",2,read,"mixed feelings",2021-11-10
+10,Patisserie at Home,Mélanie Dupuis,"9780062445315",2,read,"mixed feelings",2021-11-10,2021-11-11

bookwyrm/tests/importers/test_importer.py

@@ -1,6 +1,5 @@
 """ testing import """
 from collections import namedtuple
-import csv
 import pathlib
 from unittest.mock import patch
 import datetime
@@ -29,26 +28,7 @@ class GenericImporter(TestCase):
     def setUp(self):
         """use a test csv"""
 
-        class TestImporter(Importer):
-            """basic importer"""
-
-            mandatory_fields = ["title", "author"]
-
-            def parse_fields(self, entry):
-                return {
-                    "id": entry["id"],
-                    "Title": entry["title"],
-                    "Author": entry["author"],
-                    "ISBN13": entry["ISBN"],
-                    "Star Rating": entry["rating"],
-                    "My Rating": entry["rating"],
-                    "My Review": entry["review"],
-                    "Exclusive Shelf": entry["shelf"],
-                    "Date Added": entry["added"],
-                    "Date Read": None,
-                }
-
-        self.importer = TestImporter()
+        self.importer = Importer()
         datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
         self.csv = open(datafile, "r", encoding=self.importer.encoding)
         with patch("bookwyrm.suggested_users.rerank_suggestions_task.delay"), patch(
@@ -77,13 +57,24 @@ class GenericImporter(TestCase):
         import_items = models.ImportItem.objects.filter(job=import_job).all()
         self.assertEqual(len(import_items), 4)
         self.assertEqual(import_items[0].index, 0)
-        self.assertEqual(import_items[0].data["id"], "38")
+        self.assertEqual(import_items[0].normalized_data["id"], "38")
+        self.assertEqual(import_items[0].normalized_data["title"], "Gideon the Ninth")
+        self.assertEqual(import_items[0].normalized_data["authors"], "Tamsyn Muir")
+        self.assertEqual(import_items[0].normalized_data["isbn_13"], "9781250313195")
+        self.assertIsNone(import_items[0].normalized_data["isbn_10"])
+        self.assertEqual(import_items[0].normalized_data["shelf"], "read")
+
         self.assertEqual(import_items[1].index, 1)
-        self.assertEqual(import_items[1].data["id"], "48")
+        self.assertEqual(import_items[1].normalized_data["id"], "48")
+        self.assertEqual(import_items[1].normalized_data["title"], "Harrow the Ninth")
+
         self.assertEqual(import_items[2].index, 2)
-        self.assertEqual(import_items[2].data["id"], "23")
+        self.assertEqual(import_items[2].normalized_data["id"], "23")
+        self.assertEqual(import_items[2].normalized_data["title"], "Subcutanean")
+
         self.assertEqual(import_items[3].index, 3)
-        self.assertEqual(import_items[3].data["id"], "10")
+        self.assertEqual(import_items[3].normalized_data["id"], "10")
+        self.assertEqual(import_items[3].normalized_data["title"], "Patisserie at Home")
 
     def test_create_retry_job(self, *_):
         """trying again with items that didn't import"""
@@ -103,9 +94,9 @@ class GenericImporter(TestCase):
         retry_items = models.ImportItem.objects.filter(job=retry).all()
         self.assertEqual(len(retry_items), 2)
         self.assertEqual(retry_items[0].index, 0)
-        self.assertEqual(retry_items[0].data["id"], "38")
+        self.assertEqual(retry_items[0].normalized_data["id"], "38")
         self.assertEqual(retry_items[1].index, 1)
-        self.assertEqual(retry_items[1].data["id"], "48")
+        self.assertEqual(retry_items[1].normalized_data["id"], "48")
 
     def test_start_import(self, *_):
         """check that a task was created"""
@@ -143,15 +134,12 @@ class GenericImporter(TestCase):
         shelf = self.local_user.shelf_set.filter(identifier="read").first()
         self.assertIsNone(shelf.books.first())
 
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        for index, entry in enumerate(list(csv.DictReader(csv_file))):
-            entry = self.importer.parse_fields(entry)
-            import_item = models.ImportItem.objects.create(
-                job_id=import_job.id, index=index, data=entry, book=self.book
-            )
-            break
+        import_job = self.importer.create_job(
+            self.local_user, self.csv, False, "public"
+        )
+        import_item = import_job.items.first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             handle_imported_book(
@@ -172,15 +160,12 @@ class GenericImporter(TestCase):
                 shelved_date=make_date(2020, 2, 2),
             )
 
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        for index, entry in enumerate(list(csv.DictReader(csv_file))):
-            entry = self.importer.parse_fields(entry)
-            import_item = models.ImportItem.objects.create(
-                job_id=import_job.id, index=index, data=entry, book=self.book
-            )
-            break
+        import_job = self.importer.create_job(
+            self.local_user, self.csv, False, "unlisted"
+        )
+        import_item = import_job.items.first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             handle_imported_book(
@@ -199,15 +184,12 @@ class GenericImporter(TestCase):
     def test_handle_import_twice(self, *_):
         """re-importing books"""
         shelf = self.local_user.shelf_set.filter(identifier="read").first()
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        for index, entry in enumerate(list(csv.DictReader(csv_file))):
-            entry = self.importer.parse_fields(entry)
-            import_item = models.ImportItem.objects.create(
-                job_id=import_job.id, index=index, data=entry, book=self.book
-            )
-            break
+        import_job = self.importer.create_job(
+            self.local_user, self.csv, False, "public"
+        )
+        import_item = import_job.items.first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             handle_imported_book(
@@ -219,18 +201,15 @@ class GenericImporter(TestCase):
 
         shelf.refresh_from_db()
         self.assertEqual(shelf.books.first(), self.book)
+        self.assertEqual(models.ReadThrough.objects.count(), 1)
 
     @patch("bookwyrm.activitystreams.add_status_task.delay")
     def test_handle_imported_book_review(self, *_):
         """review import"""
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        entry = list(csv.DictReader(csv_file))[3]
-        entry = self.importer.parse_fields(entry)
-        import_item = models.ImportItem.objects.create(
-            job_id=import_job.id, index=0, data=entry, book=self.book
-        )
+        import_job = self.importer.create_job(self.local_user, self.csv, True, "public")
+        import_item = import_job.items.filter(index=3).first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             with patch("bookwyrm.models.Status.broadcast") as broadcast_mock:
@@ -251,14 +230,12 @@ class GenericImporter(TestCase):
     @patch("bookwyrm.activitystreams.add_status_task.delay")
     def test_handle_imported_book_rating(self, *_):
         """rating import"""
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        entry = list(csv.DictReader(csv_file))[1]
-        entry = self.importer.parse_fields(entry)
-        import_item = models.ImportItem.objects.create(
-            job_id=import_job.id, index=0, data=entry, book=self.book
+        import_job = self.importer.create_job(
+            self.local_user, self.csv, False, "public"
         )
+        import_item = import_job.items.filter(index=1).first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             handle_imported_book(
@@ -271,14 +248,12 @@ class GenericImporter(TestCase):
 
     def test_handle_imported_book_reviews_disabled(self, *_):
         """review import"""
-        import_job = models.ImportJob.objects.create(user=self.local_user)
-        datafile = pathlib.Path(__file__).parent.joinpath("../data/generic.csv")
-        csv_file = open(datafile, "r")  # pylint: disable=unspecified-encoding
-        entry = list(csv.DictReader(csv_file))[2]
-        entry = self.importer.parse_fields(entry)
-        import_item = models.ImportItem.objects.create(
-            job_id=import_job.id, index=0, data=entry, book=self.book
+        import_job = self.importer.create_job(
+            self.local_user, self.csv, False, "unlisted"
         )
+        import_item = import_job.items.filter(index=3).first()
+        import_item.book = self.book
+        import_item.save()
 
         with patch("bookwyrm.models.activitypub_mixin.broadcast_task.delay"):
             handle_imported_book(