Code Specs:

1. Created three models:

- Application
- Chat
- Message

2. Used Redis to keep track of the auto incrementing fileds of chat number and message number.

3. Used RabbitMQ in to handle the creation of the applications, chats and messages. To handle race conditions, the create requests are submitted to the queue which then processes them.

4. The auto generated application token is created by creating a random key and appending the application name to it.

5. The chat_count and message_count fileds are updated whenever a chat or a message is created respectivly.

6. Searching through the bodies of the messages is performed using Elasticsearch.

7. Indeces are added to the token, number and chatNumber fields to optimize the tables.

8. Created a Docker Compose file that runs the:

- MySQL Databse
- RabbitMQ
- Rails Server
- Elasticsearch
- Redis

Instructions to run the code:

Write sudo docker-compose up to start building and running the whole stack.

The rails api is exposed on port 3000

Curl requests to test the API:

Create New Application

$ curl -X POST \
    http://localhost:3000/api/v1/applications \
    -H 'content-type: application/json' \
    -d '{
  	"name":"testApp"
  }'

View All Applications

$ curl -X GET \
    http://localhost:3000/api/v1/applications

View A Specefic Application

:token is the generated token in the response of the create new application request

$ curl -X GET \
    http://localhost:3000/api/v1/applications/:token

Create New Chat

:token is the generated token in the response of the create new application request

$ curl -X POST \
    http://localhost:3000/api/v1/applications/:token/chats \
    -H 'content-type: application/json' \
    -d '{
  	"description":"testing chats"
  }'

View All Chats Of A Specefic Application

:token is the generated token in the response of the create new application request

$ curl -X GET \
    http://localhost:3000/api/v1/applications/:token/chats

View A Specefic Chat Of A Specefic Application

:token is the generated token in the response of the create new application request
:number is the generated number in the response of the create new chat request

$ curl -X GET \
    http://localhost:3000/api/v1/applications/:token/chats/:number

Create New Message

:token is the generated token in the response of the create new application request
:number is the generated number in the response of the create new chat request

$ curl -X POST \
    http://localhost:3000/api/v1/applications/:token/chats/:number/messages \
    -H 'content-type: application/json' \
    -d '{
  	"body":"an example of a message"
  }'

View All Messages Of A Specefic Chat In A Specefic Application

:token is the generated token in the response of the create new application request
:number is the generated number in the response of the create new chat request

$ curl -X GET \
    http://localhost:3000/api/v1/applications/:token/chats/:number/messages

View A Specefic Message Of A Specefic Chat In A Specefic Application

:token is the generated token in the response of the create new application request
:number is the generated number in the response of the create new chat request
:messageNumber is the generated number in the response of the create new message request

$ curl -X GET \
    http://localhost:3000/api/v1/applications/:token/chats/:number/messages/:messageNumber

Search In Messages Of A Specefic Chat In A Specefic Application (Partial Match)

:token is the generated token in the response of the create new application request
:number is the generated number in the response of the create new chat request

$ curl -X POST \
    http://localhost:3000/api/v1/applications/:token/chats/:number/search \
    -H 'content-type: application/json' \
    -d '{
  	"query":"examp"
  }'

Update Requests Can Also Be Performed Using the Same APIs

Thank You !