chat implemented

need testing

packages/shared/src/constants/index.ts

@@ -128,6 +128,13 @@ export const RECOMMENDATION_STATUSES = [
 ] as const;
 export type RecommendationStatus = (typeof RECOMMENDATION_STATUSES)[number];
 
+// Chat constants
+export const CHAT_THREAD_TYPES = ["gym", "dm"] as const;
+export type ChatThreadType = (typeof CHAT_THREAD_TYPES)[number];
+
+export const CHAT_MESSAGE_KINDS = ["text", "system"] as const;
+export type ChatMessageKind = (typeof CHAT_MESSAGE_KINDS)[number];
+
 // Helper functions to check enum values
 export function isValidUserRole(role: string): role is UserRole {
   return USER_ROLES.includes(role as UserRole);

packages/shared/src/types/index.ts

@@ -13,6 +13,8 @@ import type {
   NotificationType,
   GymStatus,
   RecommendationStatus,
+  ChatThreadType,
+  ChatMessageKind,
 } from "../constants";
 
 export interface User {
@@ -239,6 +241,55 @@ export interface TrainerClientAssignment {
   updatedAt: Date;
 }
 
+export interface ChatThread {
+  id: string;
+  type: ChatThreadType;
+  gymId?: string;
+  trainerId?: string;
+  clientId?: string;
+  createdBy: string;
+  lastMessageAt?: Date;
+  createdAt: Date;
+  updatedAt: Date;
+  archivedAt?: Date;
+}
+
+export interface ChatThreadMember {
+  id: string;
+  threadId: string;
+  userId: string;
+  roleInThread: UserRole;
+  joinedAt: Date;
+  leftAt?: Date;
+  muted: boolean;
+  lastReadMessageId?: string;
+  lastReadAt?: Date;
+}
+
+export interface ChatMessage {
+  id: string;
+  threadId: string;
+  senderUserId: string;
+  body: string;
+  kind: ChatMessageKind;
+  attachments?: Array<{
+    url: string;
+    type: string;
+    name?: string;
+  }>;
+  clientMessageId?: string;
+  createdAt: Date;
+  editedAt?: Date;
+  deletedAt?: Date;
+}
+
+export interface ChatMessageRead {
+  id: string;
+  messageId: string;
+  userId: string;
+  readAt: Date;
+}
+
 // User Report Types
 export interface WeeklyCheckInStats {
   weekStart: string; // ISO 8601 date (YYYY-MM-DD)