[Python] signnow API/django app/ send email/ e-signing contract/ [closed]

i had a task to do:

• Tasks at hand

o Brief description of the tasks to be performed

▪ The objective is to create a Django app that enables a user to register, log in, and sign a pre-defined contract. The contract will have 2 signing parties: one of them is the user that logs in initially and signs the contract, the other signing party is to be invited to sign by email.

o User Stories

▪ As a user, I want to register, so that I could get logged in to use the signing features of the app • Acceptance Criteria

o Basic django authentication is enough (session auth) o Username and password is enough for registration o No extra validation required for password or username o Upon logging in, I should be directed to the contract instantiation page

▪ As a user, I want to log in, so that I could use the signing features of the app • Acceptance Criteria

o Log in with username and password o No extra validation required for password or username o Upon logging in, I should be directed to the contract instantiation page

▪ As a user, I want to instantiate a new contract, so that I could define its signing parties (signatories) and have it signed

• Acceptance Criteria

o The contract instantiation is done on a page view (the contract instantiation page) that takes in the necessary information as necessary, as dictated in the following bullet points: o The contract is to be made up of placeholder text (‘lorem impsum...’) o The contract should have three empty spots to fill for the recipients: full name, date, and signature o One of the signatories is the user itself (me, who’s logged in as a user) o The other signatory is to be invited via collecting an email address from the user (me, who’s logged in as a user). This information will be collected on this contract instantiation page

▪ As a user, I want to sign the agreement after it’s instantiated, so that I could have it filled out, digitally signed, and sent out to the other recipient for signing

• Acceptance Crtieria

o After instantiating the contract on the contract instantiation page, I should be directed to a page that shows me the Docusign agreement o I should be able to see an agreement with the placeholder text and the empty spots to input my full name, the date, and my signature o After completing the agreement, I should be redirected to another page showing me a success message o The other signatory should also receive an email with a link for signing the agreement


I have been asked to use docusign API for that but for some reasons i just have access to SignNow API instead.

i haven't ever work with REST-APIs honestly

my setting.py:


"""
Django's settings for eSignApp project.

Generated by 'django-admin startproject' using Django 5.1.1.

For more information on this file, see
https://docs.djangoproject.com/en/5.1/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/5.1/ref/settings/
"""
import os
from dotenv import load_dotenv
from pathlib import Path
# Load environment variables from .env file
load_dotenv()


# SIGNNOW_CLIENT_ID = os.getenv('SIGNNOW_CLIENT_ID')
# SIGNNOW_CLIENT_SECRET = os.getenv('SIGNNOW_CLIENT_SECRET')


EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'smtp.example.com' # Replace with your email provider's SMTP server
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_HOST_USER = 'your_email@example.com' # Replace with your email
EMAIL_HOST_PASSWORD = 'your_password' # Replace with your email password

# 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/5.1/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure--0a-g*dpo******c74s($mi3tzoe5_02(*******bko*!r_)2a'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'contracts',
]
SIGNNOW_CLIENT_ID="38c34e58c691************336638c0"
SIGNNOW_CLIENT_SECRET="93064f118f************d2a36d598a"
SIGNNOW_API_URL="https://api-eval.signnow.com"

MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'eSignApp.urls'

TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]

WSGI_APPLICATION = 'eSignApp.wsgi.application'


# Database
# https://docs.djangoproject.com/en/5.1/ref/settings/#databases

DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}


# Password validation
# https://docs.djangoproject.com/en/5.1/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]


# Internationalization
# https://docs.djangoproject.com/en/5.1/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/5.1/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'





my views.py:

from django.http import JsonResponse
from .utils import create_pdf
import requests
import os
from django.shortcuts import render, redirect
from django.contrib.auth import login, authenticate
from .forms import UserRegistrationForm, ContractForm
from django.core.mail import send_mail

def register(request):
if request.method == 'POST':
form = UserRegistrationForm(request.POST)
if form.is_valid():
user = form.save(commit=False)
user.set_password(form.cleaned_data['password'])
user.save()
login(request, user)
return redirect('create_contract')
else:
form = UserRegistrationForm()
return render(request, 'contracts/register.html', {'form': form})


#

def login_view(request):
if request.method == 'POST':
username = request.POST['username']
password = request.POST['password']
user = authenticate(request, username=username, password=password)
if user:
login(request, user)
return redirect('/contracts/')

return JsonResponse({'message': 'Invalid credentials'}, status=401)

return JsonResponse({'message': 'Invalid request method'}, status=400)



SIGNNOW_CLIENT_ID = os.getenv('SIGNNOW_CLIENT_ID')
SIGNNOW_CLIENT_SECRET = os.getenv('SIGNNOW_CLIENT_SECRET')


def get_access_token():
url = "https://api.signnow.com/oauth2/token"
payload = {
'client_id': SIGNNOW_CLIENT_ID,
'client_secret': SIGNNOW_CLIENT_SECRET,
'grant_type': 'client_credentials'
}
response = requests.post(url, data=payload)
return response.json().get('access_token')


# contracts/views.py

def send_email_for_signature(request,email, document_id, title):
subject = f'Signature Request: {title}'
message = f'Please sign the contract document. Document ID: {document_id}'
from_email = request.user.email # Replace with your email
recipient_list =

send_mail(subject, message, from_email, recipient_list, fail_silently=False)


def create_contract(request):
if request.method == 'POST':
form = ContractForm(request.POST)
if form.is_valid():
title = form.cleaned_data['title']
recipients = form.cleaned_data['recipients'].split(',')
content = form.cleaned_data['content']

# Create a PDF file from the content
pdf_file_path = create_pdf(content, title)

# Create a document in signNow
access_token = get_access_token()
document_response = create_document_in_signnow(access_token, pdf_file_path)

# Send email to recipients
for email in recipients:
send_email_for_signature(request,email, document_response, title)

return redirect('success') # Redirect after sending
else:
form = ContractForm()
return render(request, 'contracts/create_contract.html', {'form': form})


def create_document_in_signnow(access_token, pdf_file_path):
url = "https://api.signnow.com/v2/documents"
headers = {
'Authorization': f'Bearer {access_token}',
'Content-Type': 'application/json'
}

# Open the PDF file to upload
with open(pdf_file_path, 'rb') as pdf_file:
response = requests.post(url, headers=headers, files={'file': pdf_file})

return response.json()



my forms.py:

from django import forms
from django.contrib.auth.models import User


# class ContractForm(forms.Form):
# user_name = forms.CharField(max_length=100)
# recipient_email = forms.EmailField()
class UserRegistrationForm(forms.ModelForm):
password = forms.CharField(widget=forms.PasswordInput)

class Meta:
model = User
fields = ['username', 'email', 'password']


class ContractForm(forms.Form):
title = forms.CharField(max_length=100)
recipients = forms.CharField(widget=forms.Textarea, help_text="Enter recipient emails separated by commas.")
content = forms.CharField(widget=forms.Textarea, help_text="Enter contract content with placeholders.")




my contracts(app name)/urls.py:

from django.views.generic import TemplateView
from . import views
from django.contrib.auth import views as auth_views
from django.urls import path
from .views import register, create_contract


urlpatterns = [
path('register/', register, name='register'),
path('login/', auth_views.LoginView.as_view(template_name='contracts/login.html'), name='login'),
path('create-contract/', create_contract, name='create_contract'),
path('success/', TemplateView.as_view(template_name='contracts/success.html'), name='success'),

]


templates/contracts/create_contract.html:

<!DOCTYPE html>
<html>
<head>
<title>Create Contract</title>
</head>
<body>
<h2>Create Contract</h2>
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Send Contract</button>
</form>
</body>
</html>




templates/contracts/login.html:

<!DOCTYPE html>
<html>
<head>
<title>Login</title>
</head>
<body>
<h2>Login</h2>
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Login</button>
</form>
<p>Don't have an account? <a href="{% url 'register' %}">Register here</a></p>
</body>
</html>



templates/contracts/register.html:

<!DOCTYPE html>
<html>
<head>
<title>Register</title>
</head>
<body>
<h2>Register</h2>
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Register</button>
</form>
<p>Already have an account? <a href="{% url 'login' %}">Login here</a></p>
</body>
</html>



templates/contracts/success.html:

<!DOCTYPE html>
<html>
<head>
<title>Success</title>
</head>
<body>
<h2>Contract Sent Successfully!</h2>
<p>Your contract has been sent to the recipients.</p>
<a href="{% url 'create_contract' %}">Create another contract</a>
</body>
</html>

[url="https://stackoverflow.com/questions/79263383/signnow-api-django-app-send-email-e-signing-contract"]Continue reading...[/url]