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devicehub-teal/ereuse_devicehub/resources/documents/documents.py

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import csv
import datetime
import enum
import uuid
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from io import StringIO
from typing import Callable, Iterable, Tuple
import boltons
import flask
import flask_weasyprint
import teal.marshmallow
from boltons import urlutils
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from flask import make_response
from teal.cache import cache
from teal.resource import Resource
from ereuse_devicehub.db import db
from ereuse_devicehub.resources.device import models as devs
from ereuse_devicehub.resources.device.views import DeviceView
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from ereuse_devicehub.resources.documents.device_row import DeviceRow
from ereuse_devicehub.resources.event import models as evs
class Format(enum.Enum):
HTML = 'HTML'
PDF = 'PDF'
class DocumentView(DeviceView):
class FindArgs(DeviceView.FindArgs):
format = teal.marshmallow.EnumField(Format, missing=None)
def get(self, id):
"""Get a collection of resources or a specific one.
---
parameters:
- name: id
in: path
description: The identifier of the resource.
type: string
required: false
responses:
200:
description: Return the collection or the specific one.
"""
args = self.QUERY_PARSER.parse(self.find_args,
flask.request,
locations=('querystring',))
if id:
# todo we assume we can pass both device id and event id
# for certificates... how is it going to end up being?
try:
id = uuid.UUID(id)
except ValueError:
try:
id = int(id)
except ValueError:
raise teal.marshmallow.ValidationError('Document must be an ID or UUID.')
else:
query = devs.Device.query.filter_by(id=id)
else:
query = evs.Event.query.filter_by(id=id)
else:
flask.current_app.auth.requires_auth(lambda: None)() # todo not nice
query = self.query(args)
type = urlutils.URL(flask.request.url).path_parts[-2]
if type == 'erasures':
template = self.erasure(query)
if args.get('format') == Format.PDF:
res = flask_weasyprint.render_pdf(
flask_weasyprint.HTML(string=template), download_filename='{}.pdf'.format(type)
)
else:
res = flask.make_response(template)
return res
@staticmethod
def erasure(query: db.Query):
def erasures():
for model in query:
if isinstance(model, devs.Computer):
for erasure in model.privacy:
yield erasure
elif isinstance(model, devs.DataStorage):
erasure = model.privacy
if erasure:
yield erasure
else:
assert isinstance(model, evs.EraseBasic)
yield model
url_pdf = boltons.urlutils.URL(flask.request.url)
url_pdf.query_params['format'] = 'PDF'
url_web = boltons.urlutils.URL(flask.request.url)
url_web.query_params['format'] = 'HTML'
params = {
'title': 'Erasure Certificate',
'erasures': tuple(erasures()),
'url_pdf': url_pdf.to_text(),
'url_web': url_web.to_text()
}
return flask.render_template('documents/erasure.html', **params)
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class DevicesDocumentView(DeviceView):
@cache(datetime.timedelta(minutes=1))
def find(self, args: dict):
query = self.query(args)
return self.generate_post_csv(query)
def generate_post_csv(self, query):
"""
Get device query and put information in csv format
:param query:
:return:
"""
data = StringIO()
cw = csv.writer(data)
first = True
for device in query:
d = DeviceRow(device)
if first:
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cw.writerow(d.keys())
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first = False
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cw.writerow(d.values())
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output = make_response(data.getvalue())
output.headers['Content-Disposition'] = 'attachment; filename=export.csv'
output.headers['Content-type'] = 'text/csv'
return output
class DocumentDef(Resource):
__type__ = 'Document'
SCHEMA = None
VIEW = None # We do not want to create default / documents endpoint
AUTH = False
def __init__(self, app,
import_name=__name__,
static_folder='static',
static_url_path=None,
template_folder='templates',
url_prefix=None,
subdomain=None,
url_defaults=None,
root_path=None,
cli_commands: Iterable[Tuple[Callable, str or None]] = tuple()):
super().__init__(app, import_name, static_folder, static_url_path, template_folder,
url_prefix, subdomain, url_defaults, root_path, cli_commands)
d = {'id': None}
get = {'GET'}
view = DocumentView.as_view('main', definition=self, auth=app.auth)
if self.AUTH:
view = app.auth.requires_auth(view)
self.add_url_rule('/erasures/', defaults=d, view_func=view, methods=get)
self.add_url_rule('/erasures/<{}:{}>'.format(self.ID_CONVERTER.value, self.ID_NAME),
view_func=view, methods=get)
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devices_view = DevicesDocumentView.as_view('devicesDocumentView',
definition=self,
auth=app.auth)
if self.AUTH:
devices_view = app.auth.requires_auth(devices_view)
self.add_url_rule('/devices/', defaults=d, view_func=devices_view, methods=get)