first commit

apps/api-gateway/src/dto/chat.dto.ts

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+import { IsArray, IsBoolean, IsIn, IsOptional, IsString, MinLength } from 'class-validator';
+
+export class CreateChatRoomDto {
+  @IsString()
+  @MinLength(1)
+  name!: string;
+
+  @IsOptional()
+  @IsArray()
+  @IsString({ each: true })
+  memberUserIds?: string[];
+}
+
+export class UpdateChatRoomDto {
+  @IsOptional()
+  @IsString()
+  @MinLength(1)
+  name?: string;
+
+  @IsOptional()
+  @IsBoolean()
+  notificationsMuted?: boolean;
+}
+
+export class SendChatMessageDto {
+  @IsString()
+  @IsIn(['TEXT', 'IMAGE', 'AUDIO', 'VOICE', 'FILE', 'EMOJI', 'POLL'])
+  type!: string;
+
+  @IsOptional()
+  @IsString()
+  content?: string;
+
+  @IsOptional()
+  @IsString()
+  replyToId?: string;
+
+  @IsOptional()
+  @IsString()
+  storageKey?: string;
+
+  @IsOptional()
+  @IsString()
+  mimeType?: string;
+
+  @IsOptional()
+  @IsString()
+  metadataJson?: string;
+
+  @IsOptional()
+  poll?: {
+    question: string;
+    options: string[];
+    allowsMultiple?: boolean;
+    isAnonymous?: boolean;
+  };
+}
+
+export class VotePollDto {
+  @IsArray()
+  @IsString({ each: true })
+  optionIds!: string[];
+}
+
+export class SetRoomNotificationsMutedDto {
+  @IsBoolean()
+  muted!: boolean;
+}