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from collections import OrderedDict
from copy import deepcopy
import datetime
import json
import importlib
import os
import tempfile
from zipfile import ZipFile
from django.contrib.sites.models import Site
from django.core.serializers import serialize
from version import get_version
from . import models
SERIALIZATION_VERSION = "1.0"
def get_model_from_filename(filename):
filename = filename.split(".")[0] # remove extension
module_name, model_name = filename.split("__")
module = importlib.import_module(module_name + ".models")
return getattr(module, model_name)
def serialization_info(info=None):
site = Site.objects.get_current()
base_info = {
"serialize-version": SERIALIZATION_VERSION,
"ishtar-version": get_version(),
"domain": site.domain,
"name": site.name,
"date": datetime.datetime.now().isoformat()
}
if info:
base_info.update(info)
return base_info
def archive_serialization(result, archive_dir=None, archive=False,
return_empty_types=False, archive_name=None,
info=None):
"""
Serialize all types models to JSON
Used for import and export scripts
:param result: serialization results
:param archive_dir: directory inside the archive (default None)
:param return_empty_types: if True instead of serialization return empty
types (default False)
:param archive: if True return a zip file containing all the file serialized
(default False)
:param archive_name: path to the archive if not provided a new archive is
created
:return: string containing the json serialization of types unless
return_empty_types or archive is set to True
"""
if archive and return_empty_types:
raise ValueError("archive and return_empty_types are incompatible")
if return_empty_types:
return [k for k in result if not result[k]]
if not archive:
return result
archive_created = False
if not archive_name:
archive_created = True
tmpdir = tempfile.mkdtemp(prefix="ishtarexport-") + os.sep
archive_name = tmpdir + "ishtar-{}.zip".format(
datetime.date.today().strftime("%Y-%m-%d")
)
if not archive_name.endswith(".zip"):
archive_name += ".zip"
mode = "w" if archive_created else "a"
with tempfile.TemporaryDirectory() as tmpdirname:
if archive_dir:
os.mkdir(tmpdirname + os.sep + archive_dir)
with ZipFile(archive_name, mode) as current_zip:
if archive_created:
base_filename = "info.json"
filename = tmpdirname + os.sep + base_filename
with open(filename, "w") as json_file:
json_file.write(
json.dumps(serialization_info(info=info), indent=2)
)
current_zip.write(filename, arcname=base_filename)
for dir_name, model_name in result:
base_filename = model_name + ".json"
filename = tmpdirname + os.sep + base_filename
with open(filename, "w") as json_file:
json_file.write(result[(dir_name, model_name)])
arcname = base_filename
if dir_name:
arcname = dir_name + os.sep + base_filename
current_zip.write(filename, arcname=arcname)
return archive_name
def generic_get_results(model_list, dirname, no_geo=True,
result_queryset=None):
result = OrderedDict()
for model in model_list:
base_model_name = model.__name__
model_name = str(model.__module__).split(".")[0] + "__" + \
base_model_name
if result_queryset and base_model_name in result_queryset:
base_q = result_queryset[base_model_name]
else:
base_q = model.objects
q = base_q
recursion = None
if hasattr(model, "parent"):
recursion = "parent"
elif hasattr(model, "inverse_relation"):
recursion = "inverse_relation"
elif hasattr(model, "children"):
recursion = "children__id"
if recursion:
q = q.filter(**{recursion + "__isnull": True})
key = (dirname, model_name)
result[key] = serialize(
"json", q.distinct().all(),
indent=2,
use_natural_foreign_keys=True, use_natural_primary_keys=True,
)
if recursion:
serialized = [item["id"] for item in q.values("id").all()]
recursion_in = recursion
if not recursion.endswith("_id"):
recursion_in += "_id"
recursion_in += "__in"
q = base_q.filter(**{recursion_in: serialized}
).exclude(id__in=serialized)
while q.count():
v = serialize(
"json", q.all(), indent=2, use_natural_foreign_keys=True,
use_natural_primary_keys=True)
new_result = json.loads(result[key])
new_result += json.loads(v)
result[key] = json.dumps(new_result, indent=2)
serialized += [item["id"] for item in q.values("id").all()]
q = base_q.filter(**{recursion_in: serialized}
).exclude(id__in=serialized)
# managed circular
q = base_q.exclude(id__in=serialized)
if q.count():
v = serialize(
"json", q.all(), indent=2, use_natural_foreign_keys=True,
use_natural_primary_keys=True)
result_to_add = json.loads(v)
result_cleaned = deepcopy(result_to_add)
for res in result_cleaned: # first add with no recursion
res["fields"][recursion] = None
new_result = json.loads(result[key])
new_result += result_cleaned
new_result += result_to_add
result[key] = json.dumps(new_result, indent=2)
excluded_fields = ["history_modifier", "history_creator", "imports",
"locked", "lock_user"]
if hasattr(model, "SERIALIZATION_EXCLUDE"):
excluded_fields = list(model.SERIALIZATION_EXCLUDE)
if no_geo:
excluded_fields += ["center", "limit"] + [
field.name for field in models.GeoItem._meta.get_fields()
]
if excluded_fields:
new_result = json.loads(result[key])
for idx in range(len(new_result)):
for excluded_field in excluded_fields:
if excluded_field in new_result[idx]["fields"]:
new_result[idx]["fields"].pop(excluded_field)
result[key] = json.dumps(new_result, indent=2)
return result
def generic_archive_files(model_list, archive_name=None, result_queryset=None):
if not result_queryset:
result_queryset = {}
result = []
for model in model_list:
if model.__name__ in result_queryset.keys():
query = result_queryset[model.__name__]
else:
query = model.objects
if hasattr(model, "SERIALIZATION_FILES"):
for item in query.all():
for attr in model.SERIALIZATION_FILES:
media = getattr(item, attr)
try:
result.append((media.path, media.name))
except ValueError:
pass
archive_created = False
if not archive_name:
archive_created = True
tmpdir = tempfile.mkdtemp(prefix="ishtarexport-") + os.sep
archive_name = tmpdir + "media.zip"
if not archive_name.endswith(".zip"):
archive_name += ".zip"
mode = "w" if archive_created else "a"
with ZipFile(archive_name, mode) as current_zip:
for media_path, name in result:
try:
current_zip.write(media_path, arcname=name)
except OSError:
pass
return archive_name
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