import csv import json import base64 import pandas as pd from pyhanko.sign import signers from django import forms from django.utils.translation import gettext_lazy as _ from django.core.exceptions import ValidationError from utils import credtools, certs from idhub.models import ( DID, File_datas, Membership, Schemas, Service, UserRol, VerificableCredential, ) from idhub_auth.models import User class ImportForm(forms.Form): did = forms.ChoiceField(label=_("Did"), choices=[]) schema = forms.ChoiceField(label=_("Schema"), choices=[]) file_import = forms.FileField(label=_("File import")) def __init__(self, *args, **kwargs): self._schema = None self._did = None self.rows = {} self.properties = {} self.user = kwargs.pop('user', None) super().__init__(*args, **kwargs) self.fields['did'].choices = [ (x.did, x.label) for x in DID.objects.filter(user=self.user) ] self.fields['schema'].choices = [ (x.id, x.name()) for x in Schemas.objects.filter() ] def clean_did(self): data = self.cleaned_data["did"] did = DID.objects.filter( user=self.user, did=data ) if not did.exists(): raise ValidationError("Did is not valid!") self._did = did.first() return data def clean_schema(self): data = self.cleaned_data["schema"] schema = Schemas.objects.filter( id=data ) if not schema.exists(): raise ValidationError("Schema is not valid!") self._schema = schema.first() try: self.json_schema = json.loads(self._schema.data) prop = self.json_schema['properties'] self.properties = prop['credentialSubject']['properties'] except Exception: raise ValidationError("Schema is not valid!") if not self.properties: raise ValidationError("Schema is not valid!") return data def clean_file_import(self): data = self.cleaned_data["file_import"] self.file_name = data.name if File_datas.objects.filter(file_name=self.file_name, success=True).exists(): raise ValidationError("This file already exists!") # df = pd.read_csv (data, delimiter="\t", quotechar='"', quoting=csv.QUOTE_ALL) df = pd.read_excel(data) data_pd = df.fillna('').to_dict() if not data_pd: self.exception("This file is empty!") head_row = {x: '' for x in self.properties.keys()} for n in range(df.last_valid_index()+1): row = head_row.copy() for k in data_pd.keys(): row[k] = data_pd[k][n] or '' user = self.validate_jsonld(n, row) self.rows[user] = row return data def save(self, commit=True): table = [] for k, v in self.rows.items(): table.append(self.create_credential(k, v)) if commit: for cred in table: cred.save() File_datas.objects.create(file_name=self.file_name) return table return def validate_jsonld(self, line, row): try: credtools.validate_json(row, self.json_schema) except Exception as e: msg = "line {}: {}".format(line+1, e) self.exception(msg) user = User.objects.filter(email=row.get('email')) if not user: txt = _('The user does not exist!') msg = "line {}: {}".format(line+1, txt) self.exception(msg) return user.first() def create_credential(self, user, row): return VerificableCredential( verified=False, user=user, csv_data=json.dumps(row), issuer_did=self._did, schema=self._schema, ) def exception(self, msg): File_datas.objects.create(file_name=self.file_name, success=False) raise ValidationError(msg) class SchemaForm(forms.Form): file_template = forms.FileField(label=_("File template")) class MembershipForm(forms.ModelForm): class Meta: model = Membership fields = ['type', 'start_date', 'end_date'] def clean_end_date(self): data = super().clean() start_date = data['start_date'] end_date = data.get('end_date') members = Membership.objects.filter( type=data['type'], user=self.instance.user ) if self.instance.id: members = members.exclude(id=self.instance.id) if members.filter(start_date__lte=start_date, end_date=None).exists(): msg = _("This membership already exists!") raise forms.ValidationError(msg) if (start_date and end_date): if start_date > end_date: msg = _("The end date is less than the start date") raise forms.ValidationError(msg) members = members.filter( start_date__lte=end_date, end_date__gte=start_date, ) if members.exists(): msg = _("This membership already exists!") raise forms.ValidationError(msg) if not end_date: members = members.filter( start_date__gte=start_date, ) if members.exists(): msg = _("This membership already exists!") raise forms.ValidationError(msg) return end_date class UserRolForm(forms.ModelForm): class Meta: model = UserRol fields = ['service'] def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) if not self.instance.id: user = self.instance.user choices = self.fields['service'].choices choices.queryset = choices.queryset.exclude(users__user=user) self.fields['service'].choices = choices def clean_service(self): data = super().clean() service = UserRol.objects.filter( service=data['service'], user=self.instance.user ) if service.exists(): msg = _("Is not possible to have a duplicate role") raise forms.ValidationError(msg) return data['service'] class ImportCertificateForm(forms.Form): label = forms.CharField(label=_("Label")) password = forms.CharField( label=_("Password of certificate"), widget=forms.PasswordInput ) file_import = forms.FileField(label=_("File import")) def __init__(self, *args, **kwargs): self._did = None self._s = None self._label = None self.user = kwargs.pop('user', None) super().__init__(*args, **kwargs) def clean(self): data = super().clean() file_import = data.get('file_import') self.pfx_file = file_import.read() self.file_name = file_import.name self._pss = data.get('password') self._label = data.get('label') if not self.pfx_file or not self._pss: msg = _("Is not a valid certificate") raise forms.ValidationError(msg) self.signer_init() if not self._s: msg = _("Is not a valid certificate") raise forms.ValidationError(msg) self.new_did() return data def new_did(self): cert = self.pfx_file keys = { "cert": base64.b64encode(self.pfx_file).decode('utf-8'), "passphrase": self._pss } key_material = json.dumps(keys) self._did = DID( key_material=key_material, did=self.file_name, label=self._label, eidas1=True, user=self.user ) def save(self, commit=True): if commit: self._did.save() return self._did return def signer_init(self): self._s = certs.load_cert( self.pfx_file, self._pss.encode('utf-8') )