OCA reporting engine fork for dev and update.
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# -*- coding: utf-8 -*-
# Copyright 2013 XCG Consulting (http://odoo.consulting)
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
from cStringIO import StringIO
import json
import pkg_resources
import os
import sys
from base64 import b64decode
import requests
from tempfile import NamedTemporaryFile
from py3o.template.helpers import Py3oConvertor
from py3o.template import Template
from py3o.formats import Formats
from openerp import _
from openerp import exceptions
from openerp.report.report_sxw import report_sxw
from openerp import registry
_extender_functions = {}
class TemplateNotFound(Exception):
pass
def py3o_report_extender(report_xml_id=None):
"""
A decorator to define function to extend the context sent to a template.
This will be called at the creation of the report.
The following arguments will be passed to it:
- ir_report: report instance
- localcontext: The context that will be passed to the report engine
If no report_xml_id is given the extender is registered for all py3o
reports
Idea copied from CampToCamp report_webkit module.
:param report_xml_id: xml id of the report
:return: a decorated class
"""
global _extender_functions
def fct1(fct):
_extender_functions.setdefault(report_xml_id, []).append(fct)
return fct
return fct1
@py3o_report_extender()
def defautl_extend(report_xml, localcontext):
# add the base64decode function to be able do decode binary fields into
# the template
localcontext['b64decode'] = b64decode
class Py3oParser(report_sxw):
"""Custom class that use Py3o to render libroffice reports.
Code partially taken from CampToCamp's webkit_report."""
def get_template(self, report_obj):
"""private helper to fetch the template data either from the database
or from the default template file provided by the implementer.
ATM this method takes a report definition recordset
to try and fetch the report template from database. If not found it
will fallback to the template file referenced in the report definition.
@param report_obj: a recordset representing the report defintion
@type report_obj: openerp.model.recordset instance
@returns: string or buffer containing the template data
@raises: TemplateNotFound which is a subclass of
openerp.exceptions.DeferredException
"""
tmpl_data = None
if report_obj.py3o_template_id and report_obj.py3o_template_id.id:
# if a user gave a report template
tmpl_data = b64decode(
report_obj.py3o_template_id.py3o_template_data
)
elif report_obj.py3o_template_fallback:
tmpl_name = report_obj.py3o_template_fallback
flbk_filename = None
if report_obj.module:
# if the default is defined
flbk_filename = pkg_resources.resource_filename(
"openerp.addons.%s" % report_obj.module,
tmpl_name,
)
elif os.path.isabs(tmpl_name):
# It is an absolute path
flbk_filename = os.path.normcase(os.path.normpath(tmpl_name))
if flbk_filename and os.path.exists(flbk_filename):
# and it exists on the fileystem
with open(flbk_filename, 'r') as tmpl:
tmpl_data = tmpl.read()
if tmpl_data is None:
# if for any reason the template is not found
raise TemplateNotFound(
_(u'No template found. Aborting.'),
sys.exc_info(),
)
return tmpl_data
def _extend_parser_context(self, parser_instance, report_xml):
# add default extenders
for fct in _extender_functions.get(None, []):
fct(report_xml, parser_instance.localcontext)
# add extenders for registered on the template
xml_id = report_xml.get_external_id().get(report_xml.id)
if xml_id in _extender_functions:
for fct in _extender_functions[xml_id]:
fct(report_xml, parser_instance.localcontext)
def create_single_pdf(self, cr, uid, ids, data, report_xml, context=None):
""" Overide this function to generate our py3o report
"""
if report_xml.report_type != 'py3o':
return super(Py3oParser, self).create_single_pdf(
cr, uid, ids, data, report_xml, context=context
)
parser_instance = self.parser(cr, uid, self.name2, context=context)
parser_instance.set_context(
self.getObjects(cr, uid, ids, context),
data, ids, report_xml.report_type
)
self._extend_parser_context(parser_instance, report_xml)
tmpl_data = self.get_template(report_xml)
in_stream = StringIO(tmpl_data)
out_stream = StringIO()
template = Template(in_stream, out_stream)
localcontext = parser_instance.localcontext
if report_xml.py3o_is_local_fusion:
template.render(localcontext)
in_stream = out_stream
datadict = {}
else:
expressions = template.get_all_user_python_expression()
py_expression = template.convert_py3o_to_python_ast(expressions)
convertor = Py3oConvertor()
data_struct = convertor(py_expression)
datadict = data_struct.render(localcontext)
filetype = report_xml.py3o_filetype
is_native = Formats().get_format(filetype).native
if is_native:
res = out_stream.getvalue()
else: # Call py3o.server to render the template in the desired format
in_stream.seek(0)
files = {
'tmpl_file': in_stream,
}
fields = {
"targetformat": filetype,
"datadict": json.dumps(datadict),
"image_mapping": "{}",
}
if report_xml.py3o_is_local_fusion:
fields['skipfusion'] = '1'
r = requests.post(
report_xml.py3o_server_id.url, data=fields, files=files)
if r.status_code != 200:
# server says we have an issue... let's tell that to enduser
raise exceptions.Warning(
_('Fusion server error %s') % r.text,
)
# Here is a little joke about Odoo
# we do nice chunked reading from the network...
chunk_size = 1024
with NamedTemporaryFile(
suffix=filetype,
prefix='py3o-template-'
) as fd:
for chunk in r.iter_content(chunk_size):
fd.write(chunk)
fd.seek(0)
# ... but odoo wants the whole data in memory anyways :)
res = fd.read()
return res, "." + filetype
def create(self, cr, uid, ids, data, context=None):
""" Override this function to handle our py3o report
"""
pool = registry(cr.dbname)
ir_action_report_obj = pool['ir.actions.report.xml']
report_xml_ids = ir_action_report_obj.search(
cr, uid, [('report_name', '=', self.name[7:])], context=context
)
if not report_xml_ids:
return super(Py3oParser, self).create(
cr, uid, ids, data, context=context
)
report_xml = ir_action_report_obj.browse(
cr, uid, report_xml_ids[0], context=context
)
result = self.create_source_pdf(
cr, uid, ids, data, report_xml, context
)
if not result:
return False, False
return result