Skip to end of banner
Go to start of banner

Messaging services

Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 147 Next »

Questions

  • When we send emails to users, should we download the body of the email and send it in the email body?  Or should we tell them to visit the portal?

    • At the moment, files are assumed to be stored as plain text
  • PLFM-1039 - Getting issue details... STATUS  Should notifications of this nature be implemented now or later?
    • Also, if the affected entity has child entities, should those be included in the notification?
    • Proposed implementation:
      • On create/update of ACL, fetch the original ACL
      • Compare the original with the new ACL and send a message to all users that have changed permissions
      • Message will contain the ID/alias of the person who made the change and the entity ID.  It may also contain the set of permissions.  
  • How should we tie Entities to users in terms of notifications?
    • Ownership?  << It might be this.
    • Favorites? << It might be this.
    • Permissions?  << I don't think it's this.
    • Something else?  << It could be a completely new set of services, allowing users to enable/disable notification.  (Could be initialized from Favorites and Owners.)

Objects

NameDBOMigration

DTO

  • MessageContent

(Immutable after creation)

  • Primary key: ID
  • Foreign key: CreatedBy (UserGroup)
  • Foreign key: MessageBody (S3 File Handle ID)
  • Etag
  • CreatedOn

Backup via ID

Note:  Etag is required because MessageStatus is mutable.

Interface

  • ID
  • CreatedBy (principal ID)
  • S3 File Handle ID
  • CreatedOn
  • MessageToUser

(Immutable after creation)

  • Foreign key: ID (MessageContent)
  • Subject (nullable)
  • Self foreign key: InReplyTo (ID) (nullable)
  • Foreign key: InReplyToRootId
    • Recursive foreign key to primary key

Secondary to MessageContent

Implements MessageContent

  • Subject (string, optional)
  • Set of recipient IDs
  • inReplyTo (optional)
  • inReplyToRoot (optional)
  • MessageRecipient

(Immutable after creation)

  • Foreign key: ID (MessageContent)
  • Foreign key: Recipient ID (UserGroup)

Secondary to MessageContent

 
  • MessageStatus
  • Foreign key: ID (MessageContent)
  • Foreign key: Recipient ID (UserGroup)
  • States: UNREAD, READ, ARCHIVED

Secondary to MessageContent

  • ID
  • Recipient
  • State
  • Comment

(Immutable after creation)

  • Foreign key: ID (MessageContent)
  • Target type (Enum ObjectType)
  • Target ID
  • TBD:  references to other Comments in the conversation*

Secondary to MessageContent

Implements MessageContent

  • Target type
  • Target ID
  • MessagingSettings

Part of UserProfile

Use existing services to support this

Secondary to UserGroup
  • Should email be sent?
  • Should emailed messages be READ automatically?
  • Other options (as necessary)
  • Blacklist of blocked users
  • CommentVotes
  • Primary key: Message ID
  • Up votes
  • Down votes
  • Is-comment-inappropriate votes
TBD
  • ID
  • Up
  • Down
  • MessageBundle
  Bundles the MessageToUser and Message Status
  • MessageRecipientSet
  
  • Set of recipient IDs

'* per Marcel, Comments may have a more complex set of references/relationships than Messages to Users have.  Rather than just 'inReplyTo', it might be that one Comment is an 'answer' to another comment which is a question.  Further, the multiple answers to a question may have 'previous' references which order them.

Other TODOs

  • Throttle message input 
    • Max 10 creations per minute
    • Max 50 recipients
  • When adding a new person to a conversation, the new person should get the whole history of the conversation
    • Might be implemented by forwarding ALL the previous messages 
    • OR by concatenating all previous into one new message

  • Configure Amazon SES

    • Automated proposal:
      • Reroute bounce and complaints to SNS
      • Have a worker subscribe to the topic via SQS
      • Have a worker disable emails to hard-bounced recipients
      • The worker may email a Google Group to notify us of anything it cannot handle
      • Also flip flags in settings for complaints
      • Store the bounce/complaint in a blob (question)
  • Add methods to send messages according to templates
    • Each individual Message should be stored in its final form.  
    • This design choice would change for very very large notification message volumes.
    • Templates:
      • Password reset
      • Welcome
      • Entity shared
      • Entity changed
      • TBD

Message sender (worker)

  • Extend ObjectType to include a "MESSAGE" type
  • Have DBOMessage extend ObservableEntity
  • Send a change message when a message is created
  • Subscribe worker to the repo-changes topic
  • Look for MESSAGE-CREATED changes to process
  • The worker should always check to see if a message has already been sent, so that messages do not get resent every time the stack changes.
  • Whenever the message sending worker encounters an error:
    • Send the sender of the message a notification with the summary of delivery failures
    • Add CloudWatch metrics to count delivery failures
    • If the message cannot be sent to anyone, mark the sender as the receiver of the message so that it doesn't get reprocessed (i.e. after migration)
  • Process change of other ObjectTypes (i.e. ENTITY) for notifications
    • Needs additional state: either a link between ObjectID/Type and messageContent or ObjectID/Type and UserID

Services

  • Sorting & Pagination
    • Sort by creation date
    • Sort by subject
    • Sort by recipient name

 

MethodURIBodyParametersReturnDescriptionPermission
  • POST
/messageMessageToUser MessageToUserSends a message.  Note, message delivery permission is on a recipient-by-recipient basis, asynchronous to the message creation.  Unauthorized delivery may result in silent failure or a bounce message (TBD).

Authenticated User

 

Must be admin to send to AUTH_USERS

Must have SEND_MESSAGE permission on team to send to team

  • GET
/message/inbox 

Sorting + pagination

Paginated results<MessageBundle>Gets all messages the authenticated user has receivedAuthenticated User
  • GET
/message/outbox 

Sorting + pagination

Paginated results<MessageToUser>Gets all messages the authenticated user has sentAuthenticated User
  • GET
/message/{id}  MessageToUserGets a specific messageSender or Receiver
  • POST
/message/{id}/forwardMessageRecipientSet MessageToUserForwards a message to other recipients. This is equivalent to getting a (visible) message and POST-ing it to /message with a different set of recipientsSender or Receiver
  • GET
/message/{id}/conversation 

Sorting + pagination

Paginated results<MessageToUser>Gets messages belonging in the same thread as the message ID.  The list is filtered according to the user's ID.Sender or Receiver
  • POST
/message/{id}/conversation/forwardMessageRecipientSet  

Adds the set of recipients to the conversation by marking each recipient as a receiver of each message within the conversation.

Should each recipient be sent the messages (i.e. via email)?

Or should a notification be sent instead?

Sender or Receiver
  • PUT
/message/statusMessageStatus  

Marks a message as:

  • READ
  • UNREAD
  • ARCHIVED
Receiver
  • POST
/entity/{id}/messageMessageToUser MessageToUser

Sends a message to the creator or administrator of the given entity. This allows users to ask for permission to see restricted entities.

Added per SWC-1070 - Getting issue details... STATUS

Authenticated user
  • POST
/entity/{id}/commentComment CommentMethod for commenting on an entity.

Authenticated user with SEND_MESSAGE permission on entity

  • GET
/entity/{id}/comment 

Sorting + pagination

Paginated results<Comment>Gets messages belonging to the thread tied to the entity.Authenticated user with READ permission on entity
  • No labels