ciandt-challenge-python

A challenge to develop a Python API inside a Docker container responsible for manipulating a .txt file

---

Overview:

The HR opens a request to IT for a creation of entries whenever an employee is hired or leaves the company. These entries interact with the payment system to update the information and are written in a text file.

This project consists in a development of a Python API responsible for writing lines in this text file, automating the process and saving time. A Shell Script to create and remove users on Linux also should be developed.

Requirements:

• Python 3
• Flask
• uWSGI
• Docker
• Shell Script
• Linux

API Design [app.py]:

The API receives the following information from the frontend:

• Action (ADD or DISABLE)
• Name
• Login
• Password (encrypted in Base64)

With this information provided, the API should write to the data.txt file a line with the following pattern:

ADD EMPLOYEE:

ADD "Full name", "login", "password"

OR

REMOVE EMPLOYEE:

DISABLE "login"

The password must be decrypted in the data.txt file.

The text file may have multiple lines in the end of the day.

Some validations are required:

• The login cannot repeat on the same day (same text file), even with different actions (add/disable).
• Password must contain at least 10 characters
• Password must contain at least a number
• Password must contain at least a lowercase letter
• Password must contain at least an uppercase letter
• Error messages should be displayed in case of failures in the data validation

Shell Script Design [user_import.sh]:

Read the data from the data.txt file and add or remove the respective users of each line in the Linux OS.

ADD USER:

sudo useradd -c FULL_NAME -m LOGIN_ID -p PASSWORD_ENCRYPTED_MD5

DEL USER:

sudo userdel -rf LOGIN_ID

The script should also rename the data.txt file to YYYYMMDD.bak after running the process above.

Setup:

Create the path /scripts/python/ in the Linux host machine and place user_import.sh inside it:

sudo mkdir -p /scripts/python

To build the Docker image from a Dockerfile:

docker build -t ciandt-python-challenge .

To run this container after building the image:

docker run -d -p 8080:8080 -v /scripts/python:/scripts/python ciandt-python-challenge

It's recommended to use Postman to simulate the requests in the port 8080, but the command "curl" should work as well.

The API will generate the data.txt file in the folder /scripts/python/ where is accessible from the host machine.