263 lines
9.4 KiB
Python
263 lines
9.4 KiB
Python
# This file is part of Tryton. The COPYRIGHT file at the top level of
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# this repository contains the full copyright notices and license terms.
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import os
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import hashlib
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from sql.operators import Concat
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from sql.conditionals import Coalesce
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from ..model import ModelView, ModelSQL, fields, Unique
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from ..config import config
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from .. import backend
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from ..transaction import Transaction
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from ..pyson import Eval
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from ..pool import Pool
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__all__ = [
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'Attachment',
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]
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def firstline(description):
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try:
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return (x for x in description.splitlines() if x.strip()).next()
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except StopIteration:
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return ''
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class Attachment(ModelSQL, ModelView):
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"Attachment"
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__name__ = 'ir.attachment'
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name = fields.Char('Name', required=True)
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type = fields.Selection([
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('data', 'Data'),
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('link', 'Link'),
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], 'Type', required=True)
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data = fields.Function(fields.Binary('Data', filename='name', states={
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'invisible': Eval('type') != 'data',
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}, depends=['type']), 'get_data', setter='set_data')
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description = fields.Text('Description')
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summary = fields.Function(fields.Char('Summary'), 'on_change_with_summary')
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resource = fields.Reference('Resource', selection='models_get',
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select=True)
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link = fields.Char('Link', states={
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'invisible': Eval('type') != 'link',
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}, depends=['type'])
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digest = fields.Char('Digest', size=32)
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collision = fields.Integer('Collision')
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data_size = fields.Function(fields.Integer('Data size', states={
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'invisible': Eval('type') != 'data',
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}, depends=['type']), 'get_data')
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last_modification = fields.Function(fields.DateTime('Last Modification'),
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'get_last_modification')
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last_user = fields.Function(fields.Char('Last User'),
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'get_last_user')
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@classmethod
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def __setup__(cls):
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super(Attachment, cls).__setup__()
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cls._order.insert(0, ('last_modification', 'DESC'))
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table = cls.__table__()
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cls._sql_constraints += [
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('resource_name',
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Unique(table, table.resource, table.name),
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'The names of attachments must be unique by resource!'),
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]
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@classmethod
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def __register__(cls, module_name):
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TableHandler = backend.get('TableHandler')
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cursor = Transaction().cursor
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super(Attachment, cls).__register__(module_name)
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table = TableHandler(cursor, cls, module_name)
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attachment = cls.__table__()
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# Migration from 1.4 res_model and res_id merged into resource
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# Reference
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if table.column_exist('res_model') and \
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table.column_exist('res_id'):
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table.drop_constraint('res_model_res_id_name')
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cursor.execute(*attachment.update(
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[attachment.resource],
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[Concat(Concat(attachment.resource, ','),
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attachment.res_id)]))
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table.drop_column('res_model')
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table.drop_column('res_id')
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@staticmethod
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def default_type():
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return 'data'
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@staticmethod
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def default_resource():
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return Transaction().context.get('resource')
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@staticmethod
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def default_collision():
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return 0
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@staticmethod
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def models_get():
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pool = Pool()
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Model = pool.get('ir.model')
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ModelAccess = pool.get('ir.model.access')
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models = Model.search([])
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access = ModelAccess.get_access([m.model for m in models])
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res = []
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for model in models:
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if access[model.model]['read']:
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res.append([model.model, model.name])
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return res
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def get_data(self, name):
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db_name = Transaction().cursor.dbname
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format_ = Transaction().context.pop('%s.%s'
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% (self.__name__, name), '')
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value = None
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if name == 'data_size' or format_ == 'size':
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value = 0
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if self.digest:
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filename = self.digest
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if self.collision:
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filename = filename + '-' + str(self.collision)
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filename = os.path.join(config.get('database', 'path'), db_name,
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filename[0:2], filename[2:4], filename)
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if name == 'data_size' or format_ == 'size':
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try:
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statinfo = os.stat(filename)
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value = statinfo.st_size
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except OSError:
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pass
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else:
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try:
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with open(filename, 'rb') as file_p:
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value = fields.Binary.cast(file_p.read())
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except IOError:
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pass
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return value
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@classmethod
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def set_data(cls, attachments, name, value):
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if value is None:
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return
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cursor = Transaction().cursor
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table = cls.__table__()
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db_name = cursor.dbname
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directory = os.path.join(config.get('database', 'path'), db_name)
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if not os.path.isdir(directory):
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os.makedirs(directory, 0770)
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digest = hashlib.md5(value).hexdigest()
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directory = os.path.join(directory, digest[0:2], digest[2:4])
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if not os.path.isdir(directory):
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os.makedirs(directory, 0770)
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filename = os.path.join(directory, digest)
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collision = 0
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if os.path.isfile(filename):
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with open(filename, 'rb') as file_p:
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data = file_p.read()
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if value != data:
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cursor.execute(*table.select(table.collision,
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where=(table.digest == digest)
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& (table.collision != 0),
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group_by=table.collision,
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order_by=table.collision))
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collision2 = 0
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for row in cursor.fetchall():
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collision2 = row[0]
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filename = os.path.join(directory,
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digest + '-' + str(collision2))
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if os.path.isfile(filename):
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with open(filename, 'rb') as file_p:
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data = file_p.read()
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if value == data:
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collision = collision2
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break
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if collision == 0:
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collision = collision2 + 1
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filename = os.path.join(directory,
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digest + '-' + str(collision))
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with open(filename, 'wb') as file_p:
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file_p.write(value)
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else:
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with open(filename, 'wb') as file_p:
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file_p.write(value)
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cls.write(attachments, {
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'digest': digest,
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'collision': collision,
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})
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@fields.depends('description')
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def on_change_with_summary(self, name=None):
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return firstline(self.description or '')
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def get_last_modification(self, name):
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return (self.write_date if self.write_date else self.create_date
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).replace(microsecond=0)
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@staticmethod
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def order_last_modification(tables):
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table, _ = tables[None]
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return [Coalesce(table.write_date, table.create_date)]
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def get_last_user(self, name):
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return (self.write_uid.rec_name if self.write_uid
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else self.create_uid.rec_name)
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@classmethod
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def check_access(cls, ids, mode='read'):
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pool = Pool()
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ModelAccess = pool.get('ir.model.access')
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if ((Transaction().user == 0)
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or not Transaction().context.get('_check_access')):
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return
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model_names = set()
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with Transaction().set_context(_check_access=False):
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for attachment in cls.browse(ids):
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if attachment.resource:
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model_names.add(attachment.resource.__name__)
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for model_name in model_names:
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ModelAccess.check(model_name, mode=mode)
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@classmethod
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def read(cls, ids, fields_names=None):
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cls.check_access(ids, mode='read')
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return super(Attachment, cls).read(ids, fields_names=fields_names)
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@classmethod
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def delete(cls, attachments):
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cls.check_access([a.id for a in attachments], mode='delete')
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super(Attachment, cls).delete(attachments)
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@classmethod
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def write(cls, attachments, values, *args):
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all_attachments = []
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actions = iter((attachments, values) + args)
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for records, _ in zip(actions, actions):
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all_attachments += records
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cls.check_access([a.id for a in all_attachments], mode='write')
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super(Attachment, cls).write(attachments, values, *args)
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cls.check_access(all_attachments, mode='write')
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@classmethod
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def create(cls, vlist):
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attachments = super(Attachment, cls).create(vlist)
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cls.check_access([a.id for a in attachments], mode='create')
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return attachments
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@classmethod
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def view_header_get(cls, value, view_type='form'):
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pool = Pool()
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Model = pool.get('ir.model')
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value = super(Attachment, cls).view_header_get(value,
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view_type=view_type)
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resource = Transaction().context.get('resource')
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if resource:
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model_name, record_id = resource.split(',', 1)
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ir_model, = Model.search([('model', '=', model_name)])
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Resource = pool.get(model_name)
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record = Resource(int(record_id))
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value = '%s - %s - %s' % (ir_model.name, record.rec_name, value)
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return value
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