chat

This is chat implemented using thrift.

namespace java thrift.entity

struct User { 1: i32 id 2: string username 3: string passhash }

struct Message { 1: string data 2: User author 3: string createdAt }

struct Dialog { 1: User partner 2: Message lastMessage }

enum ErrorType { NO_SUCH_USER = 404, USER_ALREADY_EXISTS = 401, INVALID_DATA = 400, SYSTEM_ERROR = 500 }

/**

Exception that can be raised by service. */ exception ChatException { 1: ErrorType errorType, 2: string message }

/** Manages user interaction / service Chat { /*

Registers user in the system.
@return newly created user id
@throws ChatException when there were validation errors or such user already exists */ i32 registerUser(1: User user) throws (1: ChatException error),

/**

Logs user in the system.
@return user id
@throws ChatException when there were validation errors or no such user */ i32 loginUser(1: User user) throws (1: ChatException error),

/**

Retrieves all users currently registered in the system.
@return list of all users
@throws ChatException when there is no such user that tries to authenticate. */ list getAllUsers(1: User user) throws (1: ChatException error),

/**

Retrieves all opened dialogs of current user.
@return list of dialogs for current user
@throws ChatException when there is no such user that tries to authenticate. */ list getDialogs(1: User user) throws (1: ChatException error),

TODO: here should go only 10 latest messages, and there must be implemented paginating

/**

Retrieves all messages in the given dialog.
@return list of messages in given dialog
@throws ChatException when there is no such user that tries to authenticate. */ list getMessages(1: User user, 2: User partner) throws (1: ChatException error),

/**

Sends a message in the form of dialog topping where user and a message are set.
@return updated list of messages in this dialog
@throws ChatException when there is no such user that tries to authenticate. */ list sendMessage(1: User user, 2: Dialog dialog) throws (1: ChatException error) }