A chat system that has multiple Application identified by token, each Application has many chats identified by a number ( number should start from 1) , each Chat has many messages identified by a number ( number should start from 1)

• the endpoints should be RESTful
• Use MySQL as datastore
• use ElasticSearch for searching through messages of a specific chat
• use a Worker to create chats and messages when a message is sent on the queue

curl -X POST http://localhost:8080/applications/ -d '{"name": "application1"}' -H "Content-Type: application/json"

• list applications

curl -X GET http://localhost:8080/applications/

• create chat for application1

curl -X POST http://localhost:8080/applications/dh82jm0q/chats

• list chats for application1

curl -X GET http://localhost:8080/applications/dh82jm0q/chats

• create message for chat 1

curl -X POST http://localhost:8080/api/v1/applications/dh82jm0q/chats/1/messages/ -d '{"body": "hello"}' -H "Content-Type: application/json"

• list all messages for chat 1

curl -X GET http://localhost:8080/applications/dh82jm0q/chats/1/messages/

• partial search in specific chat messages

curl -X GET "http://localhost:8080/applications/dh82jm0q/chats/6/messages/search?query=hel"