Create first version of docusign app

api/views.py

+from datetime import datetime, timedelta
+
+import jwt
+from django.core.mail import send_mail
+from docusign_esign import ApiClient, EnvelopesApi
 from rest_framework.renderers import TemplateHTMLRenderer
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from api.serializers import DocumentNDASerializer
+from core.settings import DOCUSIGN_PRIVATE_KEY_PATH, DOCUSIGN_INTEGRATION_KEY, DOCUSIGN_AUTH_SERVER, DOCUSIGN_API_SERVER
 
 
 class IndexView(APIView):
@@ -15,7 +21,77 @@ class IndexView(APIView):
     def post(self, request):
         serializer = DocumentNDASerializer(data=request.data)
         if serializer.is_valid():
-            serializer.save()
-             # отправка в докусайн
+            document = serializer.save()
+            send_docusign_email(request, document)
             return Response(status=200, data=serializer.data)
         return Response({'error': 'Bad Request'}, status=400)
+
+
+def gen_jwt_token(email):
+    with open(DOCUSIGN_PRIVATE_KEY_PATH, 'rb') as rsa_key:
+        private_key = rsa_key.read()
+    integration_key = DOCUSIGN_INTEGRATION_KEY
+    user_email = email
+
+    cur_time = datetime.utcnow()
+    exp_time = cur_time + timedelta(hours=1)
+
+    payload = {
+        'iss': integration_key,
+        'sub': user_email,
+        'aud': 'account-d.docusign.com',
+        'iat': cur_time,
+        'exp': exp_time,
+        'scope': 'signature impersonation'
+    }
+
+    return jwt.encode(payload, private_key, algorithm='RS256')
+
+
+def send_docusign_email(request, user_data):
+    user = user_data
+    api_client = ApiClient()
+    api_client.host = DOCUSIGN_AUTH_SERVER
+
+    jwt_token = gen_jwt_token(user.owner_email)
+    api_client.set_default_header('Authorization', 'Bearer ' + jwt_token)
+    base_url = DOCUSIGN_API_SERVER
+    envelope_api = EnvelopesApi(api_client)
+    envelope_definition = {
+        'email_subject': 'Подписать документ',
+        'email_blurb': 'Пожалуйста, подпишите документ.',
+        'status': 'sent',
+        'recipients': {
+            'signers': [{
+                'email': user.owner_email,
+                'name': user.owner_name,
+                'recipientId': '1',
+                'clientUserId': user.pk,
+                'tabs': {
+                    'textTabs': [{
+                        'tabLabel': 'Name',
+                        'value': user.owner_name
+                    }]
+                }
+            }]
+        },
+        'documents': [{
+            'documentId': '1',
+            'name': 'document.docx',
+            'fileExtension': 'docx',
+            'documentBase64': 'BASE64_ENCODED_DOCUMENT'
+        }]
+    }
+
+    envelope_summary = envelope_api.create_envelope('1', envelope_definition=envelope_definition)
+
+    sign_url = f'{base_url}/envelopes/{envelope_summary.envelope_id}/views/recipient'
+    send_mail(
+        'Подписать документ',
+        f'Пожалуйста, подпишите документ по ссылке: {sign_url}',
+        'отправитель@example.com',
+        [user.email],
+        fail_silently=False,
+    )
+
+    return {'status': 'success'}

core/settings.py

@@ -14,12 +14,12 @@ import os
 from pathlib import Path
 
 from dotenv import load_dotenv
+
 load_dotenv()
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
 
-
 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/4.2/howto/deployment/checklist/
 
@@ -31,7 +31,6 @@ DEBUG = True
 
 ALLOWED_HOSTS = []
 
-
 # Application definition
 
 INSTALLED_APPS = [
@@ -83,7 +82,6 @@ REST_FRAMEWORK = {
 
 WSGI_APPLICATION = 'core.wsgi.application'
 
-
 # Database
 # https://docs.djangoproject.com/en/4.2/ref/settings/#databases
 
@@ -98,7 +96,6 @@ DATABASES = {
     },
 }
 
-
 # Password validation
 # https://docs.djangoproject.com/en/4.2/ref/settings/#auth-password-validators
 
@@ -123,7 +120,6 @@ CORS_ORIGIN_WHITELIST = [
     'http://127.0.0.1:8000/api/v1/'
 ]
 
-
 # Internationalization
 # https://docs.djangoproject.com/en/4.2/topics/i18n/
 
@@ -135,7 +131,6 @@ USE_I18N = True
 
 USE_TZ = True
 
-
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/4.2/howto/static-files/
 
@@ -148,3 +143,9 @@ MEDIA_URL = '/demo/'
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+DOCUSIGN_INTEGRATION_KEY = os.getenv('DOCUSIGN_INTEGRATION_KEY')
+DOCUSIGN_PRIVATE_KEY_PATH = os.path.join(BASE_DIR, 'docusign_test_app-python/app/private.key')
+print(DOCUSIGN_PRIVATE_KEY_PATH)
+DOCUSIGN_AUTH_SERVER = 'https://account-d.docusign.com'
+DOCUSIGN_API_SERVER = 'https://api-d.docusign.com'