OCA reporting engine fork for dev and update.
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# -*- coding: utf-8 -*-
# Copyright 2013 XCG Consulting (http://odoo.consulting)
# Copyright 2016 ACSONE SA/NV
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
import base64
from base64 import b64decode
from cStringIO import StringIO
import json
import logging
import os
from contextlib import closing
import pkg_resources
import requests
import sys
import tempfile
from zipfile import ZipFile, ZIP_DEFLATED
from odoo.exceptions import AccessError
from odoo.exceptions import UserError
from odoo.report.report_sxw import rml_parse
from odoo import api, fields, models, _
logger = logging.getLogger(__name__)
try:
from py3o.template.helpers import Py3oConvertor
from py3o.template import Template
from py3o import formats
except ImportError:
logger.debug('Cannot import py3o.template')
try:
from py3o.formats import Formats
except ImportError:
logger.debug('Cannot import py3o.formats')
_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
localcontext['report_xml'] = report_xml
class Py3oReport(models.TransientModel):
_name = "py3o.report"
_inherit = 'report'
_description = "Report Py30"
ir_actions_report_xml_id = fields.Many2one(
comodel_name="ir.actions.report.xml",
required=True
)
@api.multi
def _get_template_from_path(self, tmpl_name):
""""Return the template from the path to root of the module if specied
or an absolute path on your server
"""
if not tmpl_name:
return None
report_xml = self.ir_actions_report_xml_id
flbk_filename = None
if report_xml.module:
# if the default is defined
flbk_filename = pkg_resources.resource_filename(
"odoo.addons.%s" % report_xml.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:
return tmpl.read()
return None
@api.multi
def _get_template_fallback(self, model_instance):
"""
Return the template referenced in the report definition
:return:
"""
self.ensure_one()
report_xml = self.ir_actions_report_xml_id
return self._get_template_from_path(report_xml.py3o_template_fallback)
@api.multi
def get_template(self, model_instance):
"""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.
@returns: string or buffer containing the template data
@raises: TemplateNotFound which is a subclass of
odoo.exceptions.DeferredException
"""
self.ensure_one()
report_xml = self.ir_actions_report_xml_id
if report_xml.py3o_template_id and report_xml.py3o_template_id.id:
# if a user gave a report template
tmpl_data = b64decode(
report_xml.py3o_template_id.py3o_template_data
)
else:
tmpl_data = self._get_template_fallback(model_instance)
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
@api.multi
def _extend_parser_context(self, context_instance, report_xml):
# add default extenders
for fct in _extender_functions.get(None, []):
fct(report_xml, context_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, context_instance.localcontext)
@api.multi
def _get_parser_context(self, model_instance, data):
report_xml = self.ir_actions_report_xml_id
context_instance = rml_parse(self.env.cr, self.env.uid,
report_xml.name,
context=self.env.context)
context_instance.set_context(model_instance, data, model_instance.ids,
report_xml.report_type)
self._extend_parser_context(context_instance, report_xml)
return context_instance.localcontext
@api.model
def _postprocess_report(self, report_path, res_id, save_in_attachment):
if save_in_attachment.get(res_id):
with open(report_path, 'rb') as pdfreport:
attachment = {
'name': save_in_attachment.get(res_id),
'datas': base64.encodestring(pdfreport.read()),
'datas_fname': save_in_attachment.get(res_id),
'res_model': save_in_attachment.get('model'),
'res_id': res_id,
}
try:
self.env['ir.attachment'].create(attachment)
except AccessError:
logger.info("Cannot save PDF report %r as attachment",
attachment['name'])
else:
logger.info(
'The PDF document %s is now saved in the database',
attachment['name'])
@api.multi
def _create_single_report(self, model_instance, data, save_in_attachment):
""" This function to generate our py3o report
"""
self.ensure_one()
report_xml = self.ir_actions_report_xml_id
filetype = report_xml.py3o_filetype
result_fd, result_path = tempfile.mkstemp(
suffix='.' + filetype, prefix='p3o.report.tmp.')
tmpl_data = self.get_template(model_instance)
in_stream = StringIO(tmpl_data)
with closing(os.fdopen(result_fd, 'w+')) as out_stream:
template = Template(in_stream, out_stream, escape_false=True)
localcontext = self._get_parser_context(model_instance, data)
is_native = Formats().get_format(filetype).native
if report_xml.py3o_is_local_fusion:
template.render(localcontext)
out_stream.seek(0)
in_stream = out_stream.read()
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)
if not is_native or not report_xml.py3o_is_local_fusion:
# Call py3o.server to render the template in the desired format
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 UserError(
_('Fusion server error %s') % r.text,
)
chunk_size = 1024
with open(result_path, 'w+') as fd:
for chunk in r.iter_content(chunk_size):
fd.write(chunk)
self._postprocess_report(
result_path, model_instance.id, save_in_attachment)
return result_path
@api.multi
def _get_or_create_single_report(self, model_instance, data,
save_in_attachment):
self.ensure_one()
if save_in_attachment and save_in_attachment[
'loaded_documents'].get(model_instance.id):
d = save_in_attachment[
'loaded_documents'].get(model_instance.id)
return d, self.ir_actions_report_xml_id.py3o_filetype
return self._create_single_report(
model_instance, data, save_in_attachment)
@api.multi
def _zip_results(self, reports_path):
self.ensure_one()
zfname_prefix = self.ir_actions_report_xml_id.name
result_path = tempfile.mktemp(suffix="zip", prefix='py3o-zip-result')
with ZipFile(result_path, 'w', ZIP_DEFLATED) as zf:
cpt = 0
for report in reports_path:
fname = "%s_%d.%s" % (
zfname_prefix, cpt, report.split('.')[-1])
zf.write(report, fname)
cpt += 1
return result_path
@api.multi
def _merge_results(self, reports_path):
self.ensure_one()
filetype = self.ir_actions_report_xml_id.py3o_filetype
if not reports_path:
return False, False
if len(reports_path) == 1:
return reports_path[0], filetype
if filetype == formats.FORMAT_PDF:
return self._merge_pdf(reports_path), formats.FORMAT_PDF
else:
return self._zip_results(reports_path), 'zip'
@api.model
def _cleanup_tempfiles(self, temporary_files):
# Manual cleanup of the temporary files
for temporary_file in temporary_files:
try:
os.unlink(temporary_file)
except (OSError, IOError):
logger.error(
'Error when trying to remove file %s' % temporary_file)
@api.multi
def create_report(self, res_ids, data):
""" Override this function to handle our py3o report
"""
model_instances = self.env[self.ir_actions_report_xml_id.model].browse(
res_ids)
save_in_attachment = self._check_attachment_use(
res_ids, self.ir_actions_report_xml_id) or {}
reports_path = []
for model_instance in model_instances:
reports_path.append(
self._get_or_create_single_report(
model_instance, data, save_in_attachment))
result_path, filetype = self._merge_results(reports_path)
reports_path.append(result_path)
# Here is a little joke about Odoo
# we do all the generation process using files to avoid memory
# consumption...
# ... but odoo wants the whole data in memory anyways :)
with open(result_path, 'r+b') as fd:
res = fd.read()
self._cleanup_tempfiles(set(reports_path))
return res, filetype