store metadata per user. remove primaryid. only store isbn13

oml/changelog.py

@@ -159,44 +159,20 @@ class Changelog(db.Model):
         return True
 
     def action_edititem(self, user, timestamp, itemid, meta):
+        from user.models import Metadata
+        m = Metadata.get_or_create(user.id, itemid)
+        m.edit(meta)
+        '''
+        FIXME: "sometimes" update item too...
         from item.models import Item
         i = Item.get(itemid)
-        if itemid == 'RDWQN35QAY6VW2UQEINOTQXLUCOFKIZK':
+        i.edit(meta, ts2datetime(timestamp))
-            return True
+        '''
-        if not i:
-            logger.debug('ignore edititem for unknown item %s %s', timestamp, itemid)
-            return True
-        if i.timestamp > timestamp:
-            logger.debug('ignore edititem change %s %s %s', timestamp, itemid, meta)
-            return True
-        if state.user() in i.users:
-            logger.debug('ignore edititem events for own items %s %s %s', timestamp, itemid, meta)
-            logger.debug('----------------------item.modified: %s', i.modified)
-            return True
-        primary = None
-        if 'primaryid' in meta:
-            primary = meta['primaryid']
-            key = primary[0]
-        else:
-            keys = [k for k in meta if k in Item.id_keys]
-            if keys:
-                key = keys[0]
-                primary = [key, meta[key]]
-        i.modified = ts2datetime(timestamp)
-        if primary:
-            if not meta[key] and i.meta.get('primaryid', [''])[0] == key:
-                logger.debug('remove id mapping %s %s', i.id, primary)
-                i.update_primaryid(*primary, scrape=False, modified=i.modified)
-            elif meta[key] and i.meta.get('primaryid') != primary:
-                logger.debug('edit mapping %s %s', i.id, primary)
-                i.update_primaryid(*primary, scrape=False, modified=i.modified)
-        else:
-            i.update_meta(meta, modified=i.modified)
-        i.save()
         return True
 
     def action_removeitem(self, user, timestamp, itemid):
         from item.models import Item
+        from user.models import Metadata
         i = Item.get(itemid)
         if i:
             if user in i.users:
@@ -205,6 +181,7 @@ class Changelog(db.Model):
                 i.update()
             else:
                 i.delete()
+        Metadata.query(user_id=user.id, item_id=itemid).delete()
         return True
 
     def action_addlist(self, user, timestamp, name, query=None):
@@ -289,6 +266,8 @@ class Changelog(db.Model):
         return True
 
     def action_editmeta(self, user, timestamp, key, value, data):
+        return True
+        '''>> Metadata no longer tracked per isbn'''
         from item.models import Metadata
         m = Metadata.get(key, value)
         if not m or m.timestamp < timestamp:
@@ -299,6 +278,7 @@ class Changelog(db.Model):
         return True
 
     def action_resetmeta(self, user, timestamp, key, value):
+        return True
         from item.models import Metadata
         m = Metadata.get(key, value)
         if m and m.timestamp < timestamp:

oml/item/api.py

@@ -132,17 +132,7 @@ def edit(data):
     for id in ids:
         item = models.Item.get(id)
         if item and item.json()['mediastate'] == 'available':
-            if 'primaryid' in data:
+            item.edit(data)
-                if data['primaryid']:
-                    key, value = data['primaryid']
-                    logger.debug('update primaryid %s %s', key, value)
-                    value = cleanup_id(key, value)
-                    item.update_primaryid(key, value)
-                else:
-                    item.update_primaryid()
-                response = item.json()
-            else:
-                item.edit_metadata(data)
             response = item.json()
             edited.append(id)
         else:
@@ -264,8 +254,6 @@ def getMetadata(data):
     for key in [k['id'] for k in settings.config['itemKeys'] if isinstance(k['type'], list)]:
         if key in response and not isinstance(response[key], list):
             response[key] = [response[key]]
-    if response:
-        response['primaryid'] = [key, value]
     return response
 actions.register(getMetadata)
 

oml/item/models.py

@@ -121,11 +121,14 @@ class Item(db.Model):
         #j['users'] = list(map(str, list(self.users)))
 
         if self.info:
-            j.update(self.info)
+            for key in self.info:
+                if (not keys or key in keys) and key not in self.meta_keys:
+                    j[key] = self.info[key]
+
         if self.meta:
             j.update(self.meta)
 
-        for key in self.id_keys + ['primaryid']:
+        for key in self.id_keys:
             if key not in self.meta and key in j:
                 del j[key]
         if keys:
@@ -220,7 +223,7 @@ class Item(db.Model):
         for f in Find.query.filter_by(item_id=self.id).filter(Find.key.notin_(keys)):
             state.db.session.delete(f)
 
-    def update(self):
+    def update(self, modified=None):
         for key in ('mediastate', 'coverRatio', 'previewRatio'):
             if key in self.meta:
                 if key not in self.info:
@@ -233,17 +236,12 @@ class Item(db.Model):
             self.info['mediastate'] = 'transferring'
         else:
             self.info['mediastate'] = 'available' if settings.USER_ID in users else 'unavailable'
-        if 'primaryid' in self.meta:
+        if modified:
-            # self.meta.update does not trigger db update!
+            self.modified = modified
-            m = Metadata.load(*self.meta['primaryid'])
+        else:
-            for key in m:
-                if key == 'id':
-                    continue
-                self.meta[key] = m[key]
             self.modified = datetime.utcnow()
         self.update_sort()
         self.update_find()
-        #self.modified = datetime.utcnow()
         self.save()
 
     def save(self):
@@ -260,14 +258,18 @@ class Item(db.Model):
 
     meta_keys = (
         'author',
-        'classification',
+        'categories',
+        'cover',
         'date',
         'description',
         'edition',
+        'isbn',
         'language',
         'pages',
         'place',
         'publisher',
+        'series',
+        'tableofcontents',
         'title'
     )
 
@@ -285,64 +287,17 @@ class Item(db.Model):
                 del self.meta[key]
                 update = True
         if update:
-            self.update()
+            self.update(modified)
-            if not modified:
-                modified = datetime.utcnow()
-            self.modified = modified
             self.save()
+            if 'cover' in record:
+                self.update_icons()
             user = state.user()
             if record and user in self.users:
                 Changelog.record_ts(user, modified, 'edititem', self.id, record)
 
-    def update_primaryid(self, key=None, id=None, scrape=True, modified=None):
+    def edit(self, data, modified=None):
-        if key is None and id is None:
-            if 'primaryid' not in self.meta:
-                return
-            else:
-                key = self.meta['primaryid'][0]
-        record = {}
-        if id:
-            if not key in self.meta or not key in self.meta[key]:
-                self.meta[key] = list(set([id] + self.meta.get(key, [])))
-            self.meta['primaryid'] = [key, id]
-            record[key] = id
-        else:
-            if key in self.meta:
-                del self.meta[key]
-            if 'primaryid' in self.meta:
-                del self.meta['primaryid']
-            record[key] = ''
-        for k in self.id_keys:
-            if k != key:
-                if k in self.meta:
-                    del self.meta[k]
-        logger.debug('set primaryid %s %s', key, id)
-
-        # get metadata from external resources
-        if scrape:
-            self.scrape()
-        self.update_icons()
-        if not modified:
-            modified = datetime.utcnow()
-        self.modified = modified
-        self.save()
-        #if not scrape:
-        #    Scrape.get_or_create(self.id)
-        for f in self.files.all():
-            f.move()
-        user = state.user()
-        if user in self.users:
-            Changelog.record_ts(user, modified, 'edititem', self.id, record)
-
-    def edit_metadata(self, data):
         Scrape.query.filter_by(item_id=self.id).delete()
-        if 'primaryid' in self.meta:
+        self.update_meta(data, modified)
-            logger.debug('m: %s', self.meta['primaryid'])
-            m = Metadata.get_or_create(*self.meta['primaryid'])
-            if m.edit(data):
-                self.update()
-        else:
-            self.update_meta(data)
         for f in self.files.all():
             f.move()
 
@@ -388,23 +343,19 @@ class Item(db.Model):
             for resolution in (128, 256, 512):
                 del icons['%s:%s' % (key, resolution)]
 
-    def scrape(self):
+    def load_metadata(self):
-        primaryid = self.meta.get('primaryid')
+        '''
-        logger.debug('scrape %s', primaryid)
+            load metadata from user_metadata or get via isbn?
-        if primaryid:
+        '''
-            try:
+        for key in self.meta_keys:
-                m = meta.lookup(*primaryid)
+            if key not in self.meta and key in self.info:
-            except:
+                self.meta[key] = self.info[key]
-                logger.debug('meta.lookup %s failed:', primaryid, exc_info=True)
+        #FIXME get from user_meta
-                m = None
+        if state.online:
-            if m:
+            if 'isbn' in self.meta:
-                m['primaryid'] = primaryid
+                data = meta.lookup('isbn', self.meta['isbn'])
-                self.meta = m
+                if data:
-                self.modified = datetime.utcnow()
+                    self.meta.update(data)
-                self.update()
-                return True
-            return False
-        return True
 
     def queue_download(self):
         u = state.user()

oml/item/scan.py

@@ -46,23 +46,14 @@ def add_file(id, f, prefix, from_=None):
     data = media.metadata(f, from_)
     file = File.get_or_create(id, data, path)
     item = file.item
-    if 'primaryid' in file.info:
-        del file.info['primaryid']
-        state.db.session.add(file)
-    if 'primaryid' in item.info:
-        item.meta['primaryid'] = item.info.pop('primaryid')
-        state.db.session.add(item)
     item.add_user(user)
-    Changelog.record(user, 'additem', item.id, file.info)
     item.added = datetime.utcnow()
-    if state.online:
+    item.load_metadata()
-        item.scrape()
+    Changelog.record(user, 'additem', item.id, file.info)
-    #Changelog.record(user, 'edititem', item.id, dict([item.meta['primaryid']]))
     Changelog.record(user, 'edititem', item.id, item.meta)
     item.update_icons()
     item.modified = datetime.utcnow()
     item.update()
-    #Scrape.get_or_create(item.id)
     return file
 
 def run_scan():

oml/media/__init__.py

@@ -15,7 +15,7 @@ from . import epub
 from . import txt
 from . import opf
 
-from meta.utils import decode_html_data
+from meta.utils import decode_html_data, to_isbn13
 
 def get_id(f=None, data=None):
     if data:
@@ -23,7 +23,6 @@ def get_id(f=None, data=None):
     else:
         return base64.b32encode(codecs.decode(ox.sha1sum(f, cached=True), 'hex')).decode()
 
-
 def metadata(f, from_=None):
     ext = f.split('.')[-1]
     data = {}
@@ -64,10 +63,17 @@ def metadata(f, from_=None):
                 data[key] = data[key].replace('\x00', '')
             elif isinstance(data[key], list):
                 data[key] = [e.replace('\x00', '') if isinstance(e, str) else e for e in data[key]]
-    if 'isbn' in data:
+    if 'isbn' in data and isinstance(data['isbn'], list):
-        data['primaryid'] = ['isbn', data['isbn'][0]]
+        isbns = set()
-    elif 'asin' in data:
+        for i in data['isbn']:
-        data['primaryid'] = ['asin', data['asin'][0]]
+            i = to_isbn13(i)
+            if i:
+                isbns.add(i)
+        if isbns:
+            data['isbn'] = list(isbns)[0]
+        else:
+            del data['isbn']
+
     if 'author' in data:
         if isinstance(data['author'], str):
             if data['author'].strip():

oml/media/epub.py

@@ -5,14 +5,13 @@
 import os
 import xml.etree.ElementTree as ET
 import zipfile
-from io import BytesIO
 import re
 from urllib.parse import unquote
+import lxml.html
 
-import stdnum.isbn
 from ox import strip_tags, decode_html
 
-from utils import normalize_isbn, find_isbns, get_language
+from utils import find_isbns, get_language, to_isbn13
 
 import logging
 logger = logging.getLogger(__name__)
@@ -104,13 +103,24 @@ def info(epub):
                     }.get(key, key)
                     value = e.text.strip()
                     if key == 'identifier':
-                        value = normalize_isbn(value)
+                        value = to_isbn13(value)
-                        if stdnum.isbn.is_valid(value):
+                        if value:
-                            data['isbn'] = [value]
+                            data['isbn'] = value
                     elif key == 'author':
                         data[key] = value.split(', ')
                     else:
                         data[key] = value
+        guide = info.findall('{http://www.idpf.org/2007/opf}guide')
+        if guide:
+            for ref in guide[0].findall('{http://www.idpf.org/2007/opf}reference'):
+                if ref.attrib.get('type') == 'toc':
+                    filename = unquote(ref.attrib['href'])
+                    filename = os.path.normpath(os.path.join(os.path.dirname(opf[0]), filename))
+                    toc = z.read(filename)
+                    if toc:
+                        doc = lxml.html.document_fromstring(toc)
+                        data['tableofcontents'] = '\n'.join([a.text_content() for a in doc.xpath('//a')])
+
     if 'description' in data:
         data['description'] = strip_tags(decode_html(data['description']))
     text = extract_text(epub)
@@ -118,7 +128,7 @@ def info(epub):
     if not 'isbn' in data:
         isbn = extract_isbn(text)
         if isbn:
-            data['isbn'] = [isbn]
+            data['isbn'] = isbn
     if 'date' in data and 'T' in data['date']:
         data['date'] = data['date'].split('T')[0]
     if 'language' in data and isinstance(data['language'], str):
@@ -139,4 +149,3 @@ def extract_isbn(data):
     isbns = find_isbns(data)
     if isbns:
         return isbns[0]
-

oml/media/opf.py

@@ -4,11 +4,9 @@
 
 import xml.etree.ElementTree as ET
 
-import stdnum.isbn
 
-from utils import normalize_isbn, get_language
+from utils import get_language, to_isbn13
 from ox import strip_tags
-import ox.iso
 
 import logging
 logger = logging.getLogger(__name__)
@@ -31,12 +29,9 @@ def info(opf):
             }.get(key, key)
             value = e.text
             if key == 'identifier':
-                isbn = normalize_isbn(value)
+                isbn = to_isbn13(value)
-                if stdnum.isbn.is_valid(isbn):
+                if isbn:
-                    if not 'isbn' in data:
+                    data['isbn'] = isbn
-                        data['isbn'] = [isbn]
-                    else:
-                        data['isbn'].append(isbn)
                 if e.attrib.get(ns + 'scheme') == 'AMAZON':
                     if not 'asin' in data:
                         data['asin'] = [value]

oml/media/pdf.py

@@ -11,11 +11,10 @@ from glob import glob
 from datetime import datetime
 
 from PyPDF2 import PdfFileReader
-import stdnum.isbn
 import ox
 
 import settings
-from utils import normalize_isbn, find_isbns, get_language
+from utils import get_language, to_isbn13, find_isbns
 
 import logging
 logger = logging.getLogger(__name__)
@@ -151,9 +150,9 @@ def info(pdf):
             del data[key]
     '''
     if 'identifier' in data:
-        value = normalize_isbn(data['identifier'])
+        value = to_isbn13(data['identifier'])
-        if stdnum.isbn.is_valid(value):
+        if value:
-            data['isbn'] = [value]
+            data['isbn'] = value
             del data['identifier']
     for key, value in data.items():
         if isinstance(value, dict):
@@ -170,9 +169,7 @@ def info(pdf):
         if not 'isbn' in data:
             isbn = extract_isbn(text)
             if isbn:
-                data['isbn'] = [isbn]
+                data['isbn'] = isbn
-    if 'isbn' in data and isinstance(data['isbn'], str):
-        data['isbn'] = [data['isbn']]
     if 'date' in data and len(data['date']) == 8 and data['date'].isdigit():
         d = data['date']
         data['date'] = '%s-%s-%s' % (d[:4], d[4:6], d[6:])

oml/media/txt.py

@@ -23,7 +23,7 @@ def info(path):
     text = extract_text(path)
     isbn = extract_isbn(text)
     if isbn:
-        data['isbn'] = [isbn]
+        data['isbn'] = isbn
     data['textsize'] = len(text)
     return data
 

oml/meta/amazon.py

@@ -46,11 +46,10 @@ def info(key, value):
             info['publisher'], info['edition'] = info['publisher'].split('; ', 1)
 
     if 'ISBN-13' in content_info:
-        if not 'isbn' in info: info['isbn'] = []
+        info['isbn'] = content_info['ISBN-13'].replace('-', '')
         info['isbn'].append(content_info['ISBN-13'].replace('-', ''))
-    if 'ISBN-10' in content_info:
+    elif 'ISBN-10' in content_info:
-        if not 'isbn' in info: info['isbn'] = []
+        info['isbn'] = stdnum.isbn.to_isbn13(content_info['ISBN-10'])
-        info['isbn'].append(content_info['ISBN-10'])
 
     a = doc.xpath('//span[@class="a-size-medium"]')
     if a:

oml/meta/duckduckgo.py

@@ -21,14 +21,13 @@ def find(query):
     done = set()
     for isbn in isbns:
         if isbn not in done:
+            isbn = stdnum.isbn.to_isbn13(isbn)
             r = {
                 'isbn': [isbn],
                 'primaryid': ['isbn', isbn]
             }
             results.append(r)
             done.add(isbn)
-            if len(isbn) == 10:
-                done.add(stdnum.isbn.to_isbn13(isbn))
             if len(isbn) == 13 and isbn.startswith('978'):
                 done.add(stdnum.isbn.to_isbn10(isbn))
     return results

oml/meta/google.py

@@ -6,7 +6,7 @@ from ox.cache import get_json, store
 import ox.web.google
 import stdnum.isbn
 
-from .utils import find_isbns, get_language, decode_html_data
+from .utils import find_isbns, get_language, decode_html_data, to_isbn13
 
 import logging
 logger = logging.getLogger(__name__)
@@ -51,6 +51,7 @@ def info(key, value):
     data = {}
     for key in [
             'authors',
+            'categories',
             'description',
             'pageCount',
             'publishedDate',
@@ -83,6 +84,9 @@ def info(key, value):
                 data['isbn'].append(k['identifier'])
             else:
                 print('unknown identifier', k)
+        if 'isbn' in data:
+            data['isbn'] = [to_isbn13(i) for i in data['isbn']][0]
+
     if 'publisher' in data and isinstance(data['publisher'], str):
         data['publisher'] = [data['publisher']]
     if 'language' in _data:

oml/meta/utils.py

@@ -6,6 +6,16 @@ import re
 import stdnum.isbn
 
 import ox
+import ox.iso
+
+def to_isbn13(isbn):
+    try:
+        isbn = stdnum.isbn.validate(isbn, True)
+        if isbn[:2] != '97':
+            isbn = None
+    except:
+        isbn = None
+    return isbn
 
 def normalize_isbn(value):
     return ''.join([s for s in value if s.isdigit() or s == 'X'])
@@ -13,14 +23,11 @@ def normalize_isbn(value):
 def find_isbns(text):
     if isinstance(text, bytes):
         text = text.decode()
-    matches = re.compile('\d[\d\-X\ ]+').findall(text)
+    matches = re.compile('\d[\d\-X\u2013\ ]+').findall(text)
     matches = [normalize_isbn(value) for value in matches]
-    return [isbn for isbn in matches if stdnum.isbn.is_valid(isbn)
+    matches = [to_isbn13(value) for value in matches]
-        and len(isbn) in (10, 13)
+    matches = list(set([value for value in matches if value]))
-        and isbn not in (
+    return matches
-        '0' * 10,
-        '0' * 13,
-    )]
 
 def get_language(lang):
     return ox.iso.codeToLang(lang.split('-')[0]) or lang

oml/setup.py

@@ -111,7 +111,6 @@ CREATE TABLE sort (
     date VARCHAR(1000), 
     language VARCHAR(1000), 
     pages BIGINT, 
-    classification VARCHAR(1000), 
     extension VARCHAR(1000), 
     size BIGINT, 
     created DATETIME, 
@@ -136,7 +135,6 @@ CREATE INDEX ix_sort_accessed ON sort (accessed);
 CREATE INDEX ix_sort_added ON sort (added);
 CREATE INDEX ix_sort_asin ON sort (asin);
 CREATE INDEX ix_sort_author ON sort (author);
-CREATE INDEX ix_sort_classification ON sort (classification);
 CREATE INDEX ix_sort_country ON sort (country);
 CREATE INDEX ix_sort_created ON sort (created);
 CREATE INDEX ix_sort_date ON sort (date);
@@ -274,7 +272,64 @@ def upgrade_db(old, new=None):
                             i.update_sort()
                             i.update_find()
                 session.commit()
-
+        if old <= '20160111-603-90648f9' and new > '20160111-603-90648f9':
+            for f in settings.ui['filters']:
+                if f['id'] == 'classification':
+                    f['id'] = 'categories'
+                    settings.ui._save()
+            run_sql('ALTER TABLE sort ADD categories VARCHAR(1000)')
+            run_sql('ALTER TABLE sort ADD series VARCHAR(1000)')
+            run_sql('CREATE INDEX ix_sort_categories ON sort (categories)')
+            run_sql('''CREATE TABLE user_metadata (
+                            created DATETIME, 
+                            modified DATETIME, 
+                            id INTEGER NOT NULL, 
+                            item_id VARCHAR(32), 
+                            user_id VARCHAR(43), 
+                            data_hash VARCHAR(40), 
+                            data BLOB, 
+                            PRIMARY KEY (id), 
+                            FOREIGN KEY(user_id) REFERENCES user (id)
+                        )''')
+            run_sql('CREATE UNIQUE INDEX IF NOT EXISTS user_metadata_index ON user_metadata(id, user_id)')
+            run_sql('CREATE INDEX ix_user_metadata_data_hash ON user_metadata (data_hash)')
+            from meta.utils import to_isbn13
+            from item.models import Item
+            from user.models import Metadata
+            with db.session() as session:
+                for i in Item.query:
+                    update = False
+                    if 'primaryid' in i.meta:
+                        del i.meta['primaryid']
+                        update = True
+                    if 'primaryid' in i.info:
+                        del i.info['primaryid']
+                        update = True
+                    for key in i.meta_keys:
+                        if key not in i.meta and key in i.info:
+                            i.meta[key] = i.info[key]
+                            update = True
+                    if 'isbn' in i.meta and isinstance(i.meta['isbn'], list):
+                        isbns = [to_isbn13(isbn) for isbn in i.meta['isbn']]
+                        isbns = [isbn for isbn in isbns if isbn]
+                        if isbns:
+                            i.meta['isbn'] = isbns[0]
+                            if 'isbn' in i.info:
+                                i.info['isbn'] = i.meta['isbn']
+                        else:
+                            del i.meta['isbn']
+                            if 'isbn' in i.info:
+                                del i.info['isbn']
+                        update = True
+                    if 'isbn' in i.meta and not i.meta['isbn']:
+                        del i.meta['isbn']
+                        update = True
+                    if update:
+                        session.add(i)
+                    for u in i.users:
+                        if u.id != settings.USER_ID:
+                            Metadata.get_or_create(u.id, i.id, i.meta, False)
+                session.commit()
 
     if old <= '20140527-120-3cb9819':
         run_sql('CREATE INDEX ix_find_findvalue ON find (findvalue)')

oml/user/models.py

@@ -1,7 +1,8 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
-
+from datetime import datetime
 import json
+import hashlib
 
 import sqlalchemy as sa
 
@@ -11,6 +12,7 @@ import db
 import json_pickler
 import settings
 import state
+import utils
 
 import logging
 logger = logging.getLogger(__name__)
@@ -118,8 +120,10 @@ class User(db.Model):
                 if not i.users:
                     i.delete()
             Changelog.query.filter_by(user_id=self.id).delete()
-            if self.id in settings.ui['showFolder']:
+            Metadata.query.filter_by(user_id=self.id).delete()
-                del settings.ui['showFolder'][self.id]
+            if self.name in settings.ui['showFolder']:
+                del settings.ui['showFolder'][self.name]
+                settings.ui._save()
             self.save()
             if was_peering:
                 Changelog.record(state.user(), 'removepeer', self.id)
@@ -318,3 +322,71 @@ class List(db.Model):
     def save(self):
         state.db.session.add(self)
         state.db.session.commit()
+
+class Metadata(db.Model):
+    __tablename__ = 'user_metadata'
+
+    created = sa.Column(sa.DateTime())
+    modified = sa.Column(sa.DateTime())
+
+    id = sa.Column(sa.Integer(), primary_key=True)
+    item_id = sa.Column(sa.String(32))
+    user_id = sa.Column(sa.String(43), sa.ForeignKey('user.id'))
+    data_hash = sa.Column(sa.String(40), index=True)
+    data = sa.Column(MutableDict.as_mutable(sa.PickleType(pickler=json_pickler)))
+
+    def __repr__(self):
+        return '{item}/{user}'.format(item=self.item_id, user=self.user_id)
+
+    @property
+    def timestamp(self):
+        return utils.datetime2ts(self.modified)
+
+    @classmethod
+    def get(cls, user_id, item_id):
+        return cls.query.filter_by(user_id=user_id,item_id=item_id).first()
+
+    @classmethod
+    def get_or_create(cls, user_id, item_id, data=None, commit=True):
+        m = cls.get(user_id=user_id, item_id=item_id)
+        if not m:
+            m = cls(user_id=user_id, item_id=item_id)
+            m.created = datetime.utcnow()
+            if data:
+                m.data = data
+            else:
+                m.data = {}
+            m.save(commit)
+        elif data:
+            m.edit(data, commit)
+        return m
+
+    def save(self, commit=True):
+        self.modified = datetime.utcnow()
+        self.data_hash = hashlib.sha1(json.dumps(self.data, ensure_ascii=False, sort_keys=True).encode()).hexdigest()
+        state.db.session.add(self)
+        if commit:
+            state.db.session.commit()
+
+    def edit(self, data, commit=True):
+        changes = {}
+        if 'isbn' in data and isinstance(data['isbn'], list):
+            isbns = [utils.to_isbn13(isbn) for isbn in data['isbn']]
+            isbns = [isbn for isbn in isbns if isbn]
+            if isbn:
+                data['isbn'] = isbn
+            else:
+                del data['isbn']
+        for key in data:
+            if key == 'id':
+                continue
+            if data[key] != self.data.get(key):
+                self.data[key] = data[key]
+                changes[key] = data[key]
+        if changes:
+            self.save(commit)
+        return changes
+
+    def delete(self):
+        state.db.session.delete(self)
+        state.db.session.commit()

oml/utils.py

@@ -29,7 +29,7 @@ from Crypto.PublicKey import RSA
 from Crypto.Util.asn1 import DerSequence
 
 
-from meta.utils import normalize_isbn, find_isbns, get_language
+from meta.utils import normalize_isbn, find_isbns, get_language, to_isbn13
 
 import logging
 logger = logging.getLogger(__name__)