openapi: 3.0.3
info:
  title: Rainbow Messaging API
  description: >-
    REST API for sending and receiving messages, managing conversations,
    and handling chat bubbles (group rooms) within the Rainbow CPaaS platform
    by Alcatel-Lucent Enterprise. Supports one-to-one chat, group bubbles,
    file sharing, and message history retrieval.
  version: '1.0'
  contact:
    url: https://developers.openrainbow.com/
  x-tags:
    - Messaging
    - Chat
    - Conversations
    - Bubbles
    - CPaaS
servers:
  - url: https://openrainbow.com/api/rainbow
    description: Rainbow Production API

security:
  - BearerAuth: []

tags:
  - name: Messages
    description: Send and receive chat messages
  - name: Conversations
    description: Manage one-to-one and group conversations
  - name: Bubbles
    description: Manage group chat rooms (bubbles)

paths:
  /enduser/v1.0/messages:
    post:
      operationId: sendMessage
      summary: Send Message
      description: >-
        Send a chat message to a contact or into a bubble (group room).
        Supports text messages and file attachments.
      tags:
        - Messages
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendMessageRequest'
      responses:
        '200':
          description: Message sent successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageResponse'
        '400':
          description: Bad Request - invalid message payload
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

  /enduser/v1.0/conversations:
    get:
      operationId: listConversations
      summary: List Conversations
      description: >-
        Returns the list of conversations for the authenticated user,
        ordered by most recent activity.
      tags:
        - Conversations
      parameters:
        - name: limit
          in: query
          required: false
          description: Maximum number of conversations to return
          schema:
            type: integer
            minimum: 1
            maximum: 100
            default: 25
        - name: offset
          in: query
          required: false
          description: Pagination offset
          schema:
            type: integer
            default: 0
      responses:
        '200':
          description: List of conversations
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConversationListResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

  /enduser/v1.0/conversations/{conversationId}/messages:
    get:
      operationId: getConversationMessages
      summary: Get Conversation Messages
      description: >-
        Returns the message history for a specific conversation.
      tags:
        - Messages
      parameters:
        - name: conversationId
          in: path
          required: true
          description: Unique identifier of the conversation
          schema:
            type: string
        - name: limit
          in: query
          required: false
          description: Maximum number of messages to return
          schema:
            type: integer
            default: 50
            maximum: 200
        - name: before
          in: query
          required: false
          description: Return messages before this timestamp (ISO 8601)
          schema:
            type: string
            format: date-time
      responses:
        '200':
          description: Message history for the conversation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MessageListResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Conversation not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

  /enduser/v1.0/bubbles:
    get:
      operationId: listBubbles
      summary: List Bubbles
      description: >-
        Returns the list of group chat rooms (bubbles) the authenticated user
        is a member of.
      tags:
        - Bubbles
      parameters:
        - name: limit
          in: query
          required: false
          description: Maximum number of bubbles to return
          schema:
            type: integer
            default: 25
        - name: offset
          in: query
          required: false
          description: Pagination offset
          schema:
            type: integer
            default: 0
      responses:
        '200':
          description: List of bubbles (group rooms)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BubbleListResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

    post:
      operationId: createBubble
      summary: Create Bubble
      description: >-
        Creates a new group chat room (bubble). The creator becomes the owner.
      tags:
        - Bubbles
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateBubbleRequest'
      responses:
        '200':
          description: Bubble created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BubbleResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

  /enduser/v1.0/bubbles/{bubbleId}:
    get:
      operationId: getBubble
      summary: Get Bubble
      description: Returns details of a specific bubble (group room).
      tags:
        - Bubbles
      parameters:
        - name: bubbleId
          in: path
          required: true
          description: Unique identifier of the bubble
          schema:
            type: string
      responses:
        '200':
          description: Bubble details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BubbleResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Bubble not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'

components:
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: Bearer token obtained via Rainbow OAuth2 authentication

  schemas:
    SendMessageRequest:
      type: object
      required: [content]
      properties:
        content:
          type: string
          description: Text content of the message
        to:
          type: string
          description: Recipient contact ID or bubble ID
        type:
          type: string
          enum: [chat, groupchat]
          default: chat
          description: Message type - chat for 1-to-1, groupchat for bubbles

    MessageResponse:
      type: object
      properties:
        id:
          type: string
          description: Unique message identifier
        content:
          type: string
          description: Message text content
        from:
          type: string
          description: Sender's contact ID
        to:
          type: string
          description: Recipient contact ID or bubble ID
        type:
          type: string
          enum: [chat, groupchat]
        timestamp:
          type: string
          format: date-time
          description: Message creation timestamp
        status:
          type: string
          enum: [sent, delivered, read]

    MessageListResponse:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/MessageResponse'
        total:
          type: integer
        limit:
          type: integer
        offset:
          type: integer

    ConversationListResponse:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Conversation'
        total:
          type: integer
        limit:
          type: integer
        offset:
          type: integer

    Conversation:
      type: object
      properties:
        id:
          type: string
          description: Unique conversation identifier
        type:
          type: string
          enum: [user, bubble]
        peerId:
          type: string
          description: Contact ID or bubble ID
        lastMessage:
          $ref: '#/components/schemas/MessageResponse'
        unreadCount:
          type: integer
          description: Number of unread messages

    BubbleListResponse:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Bubble'
        total:
          type: integer

    CreateBubbleRequest:
      type: object
      required: [name]
      properties:
        name:
          type: string
          description: Name of the bubble
        topic:
          type: string
          description: Topic or description of the bubble
        users:
          type: array
          items:
            type: string
          description: Initial list of contact IDs to invite

    BubbleResponse:
      type: object
      properties:
        data:
          $ref: '#/components/schemas/Bubble'

    Bubble:
      type: object
      properties:
        id:
          type: string
          description: Unique bubble identifier
        name:
          type: string
          description: Bubble name
        topic:
          type: string
          description: Bubble topic
        owner:
          type: string
          description: Contact ID of the bubble owner
        users:
          type: array
          items:
            type: string
          description: List of member contact IDs
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time

    ErrorResponse:
      type: object
      properties:
        code:
          type: integer
          description: Error code
        msg:
          type: string
          description: Error message
        param:
          type: string
          description: Parameter that caused the error