adding models and stale state for convos

packages/core/models/audioClip.model.ts

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+import { ObjectId } from "mongodb";
+
+export default class AudioClip {
+  constructor(
+    public _id: ObjectId,
+
+    public url: string,
+
+    public createdDate: Date = new Date(),
+    public duration?: number
+  ) {}
+}

packages/core/models/conversation.model.ts

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+import { ObjectId } from "mongodb";
+
+export class Conversation {
+  _id: ObjectId;
+  name?: string;
+
+  createdDate: Date;
+  lastUpdatedDate: Date;
+
+  constructor() {}
+}
+
+export class ConversationMember {
+  _id: ObjectId;
+
+  // unique constraint
+  conversationId: ObjectId;
+  userId: ObjectId;
+
+  state: ConversationMemberState;
+
+  createdDate: Date;
+}
+
+export enum ConversationMemberState {
+  INVITED = "INVITED", // user gets this in their request inbox
+  INBOX = "INBOX", // user decided to join this conversation after being invited
+  TUNED = "TUNED", // user upgraded priority of this and now is tuned in live to convo
+  ARCHIVED = "ARCHIVED", // user no longer wants anything to do with convo
+}

packages/core/models/masterConversation.model.ts

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+import AudioClip from "./audioClip.model";
+import { ConversationMember } from "./conversation.model";
+import { ObjectId } from "mongodb";
+
+export default class MasterConversation {
+  // attributes of conversation
+  id: ObjectId; // id of the conversation
+  name?: string;
+  createdDate: Date;
+  lastUpdatedDate: Date;
+
+  // compiled data for easy client read
+  currentUserMember: ConversationMember;
+  otherMembers: ConversationMember[];
+
+  audioClips: AudioClip[];
+}