OCA reporting engine fork for dev and update.
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# 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 io import BytesIO
import logging
import os
from contextlib import closing
import subprocess
import pkg_resources
import sys
import tempfile
from zipfile import ZipFile, ZIP_DEFLATED
from odoo import api, fields, models, tools, _
from ._py3o_parser_context import Py3oParserContext
logger = logging.getLogger(__name__)
try:
from py3o.template import Template
from py3o import formats
except ImportError:
logger.debug('Cannot import py3o.template')
try:
from py3o.formats import Formats, UnkownFormatException
except ImportError:
logger.debug('Cannot import py3o.formats')
try:
from PyPDF2 import PdfFileWriter, PdfFileReader
except ImportError:
logger.debug('Cannot import PyPDF2')
_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 default_extend(report_xml, context):
context['report_xml'] = report_xml
class Py3oReport(models.TransientModel):
_name = "py3o.report"
_description = "Report Py30"
ir_actions_report_id = fields.Many2one(
comodel_name="ir.actions.report",
required=True,
ondelete="cascade"
)
@api.multi
def _is_valid_template_path(self, path):
""" Check if the path is a trusted path for py3o templates.
"""
real_path = os.path.realpath(path)
root_path = tools.config.get_misc('report_py3o', 'root_tmpl_path')
if not root_path:
logger.warning(
"You must provide a root template path into odoo.cfg to be "
"able to use py3o template configured with an absolute path "
"%s", real_path)
return False
is_valid = real_path.startswith(root_path + os.path.sep)
if not is_valid:
logger.warning(
"Py3o template path is not valid. %s is not a child of root "
"path %s", real_path, root_path)
return is_valid
@api.multi
def _is_valid_template_filename(self, filename):
""" Check if the filename can be used as py3o template
"""
if filename and os.path.isfile(filename):
fname, ext = os.path.splitext(filename)
ext = ext.replace('.', '')
try:
fformat = Formats().get_format(ext)
if fformat and fformat.native:
return True
except UnkownFormatException:
logger.warning("Invalid py3o template %s", filename,
exc_info=1)
logger.warning(
'%s is not a valid Py3o template filename', filename)
return False
@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_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 self._is_valid_template_path(tmpl_name):
flbk_filename = os.path.realpath(tmpl_name)
if self._is_valid_template_filename(flbk_filename):
with open(flbk_filename, 'rb') 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_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_id
if report_xml.py3o_template_id.py3o_template_data:
# 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(
_('No template found. Aborting.'),
sys.exc_info(),
)
return tmpl_data
@api.multi
def _extend_parser_context(self, context, report_xml):
# add default extenders
for fct in _extender_functions.get(None, []):
fct(report_xml, context)
# 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)
@api.multi
def _get_parser_context(self, model_instance, data):
report_xml = self.ir_actions_report_id
context = Py3oParserContext(self.env).localcontext
context.update(
report_xml._get_rendering_context(model_instance.ids, data)
)
context['objects'] = model_instance
self._extend_parser_context(context, report_xml)
return context
@api.multi
def _postprocess_report(self, model_instance, result_path):
if len(model_instance) == 1 and self.ir_actions_report_id.attachment:
with open(result_path, 'rb') as f:
# we do all the generation process using files to avoid memory
# consumption...
# ... but odoo wants the whole data in memory anyways :)
buffer = BytesIO(f.read())
self.ir_actions_report_id.postprocess_pdf_report(
model_instance, buffer)
return result_path
@api.multi
def _create_single_report(self, model_instance, data):
""" This function to generate our py3o report
"""
self.ensure_one()
result_fd, result_path = tempfile.mkstemp(
suffix='.ods', prefix='p3o.report.tmp.')
tmpl_data = self.get_template(model_instance)
in_stream = BytesIO(tmpl_data)
with closing(os.fdopen(result_fd, 'wb+')) as out_stream:
template = Template(in_stream, out_stream, escape_false=True)
localcontext = self._get_parser_context(model_instance, data)
template.render(localcontext)
out_stream.seek(0)
tmpl_data = out_stream.read()
if self.env.context.get('report_py3o_skip_conversion'):
return result_path
result_path = self._convert_single_report(
result_path, model_instance, data
)
return self._postprocess_report(model_instance, result_path)
@api.multi
def _convert_single_report(self, result_path, model_instance, data):
"""Run a command to convert to our target format"""
if not self.ir_actions_report_id.is_py3o_native_format:
command = self._convert_single_report_cmd(
result_path, model_instance, data,
)
logger.debug('Running command %s', command)
output = subprocess.check_output(
command, cwd=os.path.dirname(result_path),
)
logger.debug('Output was %s', output)
self._cleanup_tempfiles([result_path])
result_path, result_filename = os.path.split(result_path)
result_path = os.path.join(
result_path, '%s.%s' % (
os.path.splitext(result_filename)[0],
self.ir_actions_report_id.py3o_filetype
)
)
return result_path
@api.multi
def _convert_single_report_cmd(self, result_path, model_instance, data):
"""Return a command list suitable for use in subprocess.call"""
lo_bin = self.ir_actions_report_id.lo_bin_path
if not lo_bin:
raise RuntimeError(
_("Libreoffice runtime not available. "
"Please contact your administrator.")
)
return [
lo_bin,
'--headless',
'--convert-to',
self.ir_actions_report_id.py3o_filetype,
result_path,
]
@api.multi
def _get_or_create_single_report(self, model_instance, data,
existing_reports_attachment):
self.ensure_one()
attachment = existing_reports_attachment.get(
model_instance.id)
if attachment and self.ir_actions_report_id.attachment_use:
content = base64.decodestring(attachment.datas)
report_file = tempfile.mktemp(
"." + self.ir_actions_report_id.py3o_filetype)
with open(report_file, "wb") as f:
f.write(content)
return report_file
return self._create_single_report(
model_instance, data)
@api.multi
def _zip_results(self, reports_path):
self.ensure_one()
zfname_prefix = self.ir_actions_report_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.model
def _merge_pdf(self, reports_path):
""" Merge PDF files into one.
:param reports_path: list of path of pdf files
:returns: path of the merged pdf
"""
writer = PdfFileWriter()
for path in reports_path:
reader = PdfFileReader(path)
writer.appendPagesFromReader(reader)
merged_file_fd, merged_file_path = tempfile.mkstemp(
suffix='.pdf', prefix='report.merged.tmp.')
with closing(os.fdopen(merged_file_fd, 'wb')) as merged_file:
writer.write(merged_file)
return merged_file_path
@api.multi
def _merge_results(self, reports_path):
self.ensure_one()
filetype = self.ir_actions_report_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_id.model].browse(
res_ids)
reports_path = []
if (
len(res_ids) > 1 and
self.ir_actions_report_id.py3o_multi_in_one):
reports_path.append(
self._create_single_report(
model_instances, data))
else:
existing_reports_attachment = \
self.ir_actions_report_id._get_attachments(res_ids)
for model_instance in model_instances:
reports_path.append(
self._get_or_create_single_report(
model_instance, data, existing_reports_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