Create comment object

[michael-small]

Comments in abstracts right now are just a single string. Due to multiple comments being possible, with different metadata such as timestamps or submitters, comments should likely be considered to be objects in their own right. My thought is that submissions/abstracts should have comments be comment objects nested in them.

Thoughts?

[michael-small]

Comments should be linked to an abstract via Mongo's aggregation command.

https://mongodb.github.io/mongo-java-driver/3.10/driver/tutorials/aggregation/#perform-aggregation

Example from Paul: https://github.com/UMM-CSci-3601-F17/interation-1-drop-table-teams/blob/master/server/src/main/java/umm3601/deck/DeckController.java#L60

Basically, submissions' comments would just be IDs referring to comment objects. Aggregation links the two into one flat file.

[michael-small]

Another update: I won't push this up now but Nic and Paul were concerned about the way comments might nest with subcomments. They propose the following:

import {User} from "../user";

export interface Comment {
    _id?: {
        $oid: string
    };
    commenter: User;
    quotedSnippet?: string; //generated by highlighting abstract... may not always be needed
    commenterInput: string;
    resolved?: boolean; //Top level comments (TLC's) resolvable, comments on TLC resolved via TLC resolution
    timestamp: string;
}

export interface TopComment extends Comment{
    subComments: Array<Comment>;
}

With that change, toplevel comments are an extended version of Comments, with the addition of having an array of comments as subComments.