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from plugin.core.helpers.variable import to_tuple |
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from plugin.models import db |
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import apsw |
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import inspect |
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import logging |
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import peewee |
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log = logging.getLogger(__name__) |
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class Method(object): |
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def __init__(self, manager, *args, **kwargs): |
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self.manager = manager |
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@property |
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def model(self): |
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return self.manager.model |
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class Get(Method): |
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def __call__(self, *query, **kwargs): |
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obj = self.model.get(*query, **kwargs) |
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if obj: |
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obj._created = False |
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return obj |
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def all(self): |
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return self.model.select() |
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def by_id(self, id): |
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return self(self.model.id == id) |
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def or_create(self, *query, **kwargs): |
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try: |
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return self.manager.create(**kwargs) |
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except (apsw.ConstraintError, peewee.IntegrityError), ex: |
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log.debug('or_create() - ex: %r', ex) |
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return self(*query) |
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def where(self, *query): |
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return self.model.select().where(*query) |
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class Create(Method): |
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def __call__(self, **kwargs): |
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if not self.model: |
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raise Exception('Manager %r has no "model" attribute defined' % self.manager) |
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with db.transaction(): |
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obj = self.model.create(**kwargs) |
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if obj: |
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# Set flag |
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obj._created = True |
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return obj |
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class Update(Method): |
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keys = [] |
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def __call__(self, obj, data, save=True): |
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changed = False |
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for key, value in data.items(): |
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if not hasattr(obj, key): |
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raise KeyError('%r has no key %r' % (obj, key)) |
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if getattr(obj, key) == value: |
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continue |
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changed = True |
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setattr(obj, key, value) |
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if not changed: |
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return False |
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if save: |
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obj.save() |
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return True |
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def from_dict(self, obj, changes, save=True): |
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if not changes: |
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return False |
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# Resolve `account` |
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if inspect.isfunction(obj): |
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obj = obj() |
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# Update `TraktAccount` |
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data = {} |
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for key in self.keys: |
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if key not in changes: |
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continue |
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data[key] = changes[key] |
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if data and not self(obj, data, save=save): |
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log.debug('Unable to update %r (nothing changed?)', obj) |
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return True |
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class ManagerMeta(type): |
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def __init__(cls, name, bases, attributes): |
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super(ManagerMeta, cls).__init__(name, bases, attributes) |
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if '__metaclass__' in attributes: |
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return |
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# Construct manager methods |
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for key in ['get', 'create', 'update']: |
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value = getattr(cls, key) |
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if not value or not inspect.isclass(value): |
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continue |
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# Construct method |
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setattr(cls, key, value(cls)) |
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class Manager(object): |
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__metaclass__ = ManagerMeta |
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create = Create |
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get = Get |
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update = Update |
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model = None |
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