[#94] Backend

https://project.mdnd-it.cc/work_packages/94

SerpentRace_Backend/src/Application/Chat/queries/ChatHistoryQueryHandlers.ts

@@ -0,0 +1,141 @@
+import { GetChatHistoryQuery, GetArchivedChatsQuery } from './ChatQueries';
+import { IChatRepository } from '../../../Domain/IRepository/IChatRepository';
+import { IChatArchiveRepository } from '../../../Domain/IRepository/IChatArchiveRepository';
+import { Message } from '../../../Domain/Chat/ChatAggregate';
+import { logAuth, logError, logWarning } from '../../Services/Logger';
+
+interface ChatHistoryResult {
+    chatId: string;
+    messages: Message[];
+    isArchived: boolean;
+    chatInfo: {
+        type: string;
+        name: string | null;
+        gameId: string | null;
+        users: string[];
+    };
+}
+
+export class GetChatHistoryQueryHandler {
+    constructor(
+        private chatRepository: IChatRepository,
+        private chatArchiveRepository: IChatArchiveRepository
+    ) {}
+
+    async execute(query: GetChatHistoryQuery): Promise<ChatHistoryResult | null> {
+        try {
+            // First try to find active chat
+            const chat = await this.chatRepository.findById(query.chatId);
+            
+            if (chat) {
+                // Check authorization
+                if (!chat.users.includes(query.userId)) {
+                    logWarning('Unauthorized chat history access attempt', {
+                        chatId: query.chatId,
+                        userId: query.userId
+                    });
+                    return null;
+                }
+
+                logAuth('Chat history retrieved', query.userId, {
+                    chatId: query.chatId,
+                    messageCount: chat.messages.length,
+                    isArchived: false
+                });
+
+                return {
+                    chatId: query.chatId,
+                    messages: chat.messages,
+                    isArchived: false,
+                    chatInfo: {
+                        type: chat.type,
+                        name: chat.name,
+                        gameId: chat.gameId,
+                        users: chat.users
+                    }
+                };
+            }
+
+            // Try to find in archives
+            const archives = await this.chatArchiveRepository.findByChatId(query.chatId);
+            const userArchive = archives.find(archive => 
+                archive.participants.includes(query.userId)
+            );
+
+            if (userArchive) {
+                logAuth('Archived chat history retrieved', query.userId, {
+                    chatId: query.chatId,
+                    messageCount: userArchive.archivedMessages.length,
+                    isArchived: true
+                });
+
+                return {
+                    chatId: query.chatId,
+                    messages: userArchive.archivedMessages,
+                    isArchived: true,
+                    chatInfo: {
+                        type: userArchive.chatType,
+                        name: userArchive.chatName,
+                        gameId: userArchive.gameId,
+                        users: userArchive.participants
+                    }
+                };
+            }
+
+            logWarning('Chat history not found', {
+                chatId: query.chatId,
+                userId: query.userId
+            });
+
+            return null;
+
+        } catch (error) {
+            logError('GetChatHistoryQueryHandler error', error as Error);
+            return null;
+        }
+    }
+}
+
+export class GetArchivedChatsQueryHandler {
+    constructor(private chatArchiveRepository: IChatArchiveRepository) {}
+
+    async execute(query: GetArchivedChatsQuery): Promise<ChatHistoryResult[]> {
+        try {
+            let archives: any[] = [];
+
+            if (query.gameId) {
+                // Get archived game chats
+                archives = await this.chatArchiveRepository.findByGameId(query.gameId);
+            } else {
+                // Get all archived chats for user (would need different query)
+                // For now, return empty - this would need a new repository method
+                archives = [];
+            }
+
+            const result = archives
+                .filter(archive => archive.participants.includes(query.userId))
+                .map(archive => ({
+                    chatId: archive.chatId,
+                    messages: archive.archivedMessages,
+                    isArchived: true,
+                    chatInfo: {
+                        type: archive.chatType,
+                        name: archive.chatName,
+                        gameId: archive.gameId,
+                        users: archive.participants
+                    }
+                }));
+
+            logAuth('Archived chats retrieved', query.userId, {
+                count: result.length,
+                gameId: query.gameId
+            });
+
+            return result;
+
+        } catch (error) {
+            logError('GetArchivedChatsQueryHandler error', error as Error);
+            return [];
+        }
+    }
+}

SerpentRace_Backend/src/Application/Chat/queries/ChatQueries.ts

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+export interface GetUserChatsQuery {
+    userId: string;
+    includeArchived?: boolean;
+}
+
+export interface GetChatHistoryQuery {
+    chatId: string;
+    userId: string; // For authorization
+}
+
+export interface GetArchivedChatsQuery {
+    userId: string;
+    gameId?: string;
+}

SerpentRace_Backend/src/Application/Chat/queries/GetChatsByPageQuery.ts

@@ -0,0 +1,5 @@
+export interface GetChatsByPageQuery {
+    from: number;
+    to: number;
+    includeDeleted?: boolean;
+}

SerpentRace_Backend/src/Application/Chat/queries/GetChatsByPageQueryHandler.ts

@@ -0,0 +1,55 @@
+import { IChatRepository } from '../../../Domain/IRepository/IChatRepository';
+import { GetChatsByPageQuery } from './GetChatsByPageQuery';
+import { ShortChatDto } from '../../DTOs/ChatDto';
+import { ChatMapper } from '../../DTOs/Mappers/ChatMapper';
+import { logRequest, logError } from '../../Services/Logger';
+
+export class GetChatsByPageQueryHandler {
+  constructor(private readonly chatRepo: IChatRepository) {}
+
+  async execute(query: GetChatsByPageQuery): Promise<{ chats: ShortChatDto[], totalCount: number }> {
+    try {
+      // Validate pagination parameters
+      if (query.from < 0 || query.to < query.from) {
+        throw new Error('Invalid pagination parameters');
+      }
+
+      const limit = query.to - query.from + 1;
+      if (limit > 100) {
+        throw new Error('Page size too large. Maximum 100 records per request');
+      }
+
+      logRequest('Get chats by page query started', undefined, undefined, {
+        from: query.from,
+        to: query.to,
+        includeDeleted: query.includeDeleted || false
+      });
+
+      const result = query.includeDeleted
+        ? await this.chatRepo.findByPageIncludingDeleted(query.from, query.to)
+        : await this.chatRepo.findByPage(query.from, query.to);
+
+      logRequest('Get chats by page query completed', undefined, undefined, {
+        from: query.from,
+        to: query.to,
+        returned: result.chats.length,
+        totalCount: result.totalCount,
+        includeDeleted: query.includeDeleted || false
+      });
+
+      return {
+        chats: ChatMapper.toShortDtoList(result.chats),
+        totalCount: result.totalCount
+      };
+    } catch (error) {
+      logError('GetChatsByPageQueryHandler error', error instanceof Error ? error : new Error(String(error)));
+      
+      // Re-throw validation errors as-is
+      if (error instanceof Error && (error.message.includes('Invalid pagination') || error.message.includes('Page size'))) {
+        throw error;
+      }
+      
+      throw new Error('Failed to retrieve chats page');
+    }
+  }
+}

SerpentRace_Backend/src/Application/Chat/queries/GetUserChatsQueryHandler.ts

@@ -0,0 +1,97 @@
+import { GetUserChatsQuery } from './ChatQueries';
+import { IChatRepository } from '../../../Domain/IRepository/IChatRepository';
+import { IChatArchiveRepository } from '../../../Domain/IRepository/IChatArchiveRepository';
+import { ChatAggregate } from '../../../Domain/Chat/ChatAggregate';
+import { ChatArchiveAggregate } from '../../../Domain/Chat/ChatArchiveAggregate';
+import { logAuth, logError } from '../../Services/Logger';
+
+interface ChatWithMetadata {
+    id: string;
+    type: string;
+    name: string | null;
+    gameId: string | null;
+    users: string[];
+    lastActivity: Date | null;
+    isArchived: boolean;
+    messageCount: number;
+    unreadCount?: number;
+}
+
+export class GetUserChatsQueryHandler {
+    constructor(
+        private chatRepository: IChatRepository,
+        private chatArchiveRepository: IChatArchiveRepository
+    ) {}
+
+    async execute(query: GetUserChatsQuery): Promise<ChatWithMetadata[]> {
+        try {
+            const result: ChatWithMetadata[] = [];
+
+            // Get active chats
+            const activeChats = await this.chatRepository.findActiveChatsForUser(query.userId);
+            result.push(...activeChats.map(chat => ({
+                id: chat.id,
+                type: chat.type,
+                name: chat.name,
+                gameId: chat.gameId,
+                users: chat.users,
+                lastActivity: chat.lastActivity,
+                isArchived: false,
+                messageCount: chat.messages.length,
+                unreadCount: this.calculateUnreadMessages(chat, query.userId)
+            })));
+
+            // Get archived chats if requested
+            if (query.includeArchived) {
+                const userActiveChats = await this.chatRepository.findByUserId(query.userId);
+                const archivedChatIds = userActiveChats
+                    .filter(chat => chat.archiveDate !== null)
+                    .map(chat => chat.id);
+
+                const archives = await Promise.all(
+                    archivedChatIds.map(id => this.chatArchiveRepository.findByChatId(id))
+                );
+
+                archives.forEach(archiveArray => {
+                    archiveArray.forEach(archive => {
+                        if (archive.participants.includes(query.userId)) {
+                            result.push({
+                                id: archive.chatId,
+                                type: archive.chatType,
+                                name: archive.chatName,
+                                gameId: archive.gameId,
+                                users: archive.participants,
+                                lastActivity: archive.archivedAt,
+                                isArchived: true,
+                                messageCount: archive.archivedMessages.length,
+                                unreadCount: 0 // Archived chats have no unread messages
+                            });
+                        }
+                    });
+                });
+            }
+
+            logAuth('User chats retrieved', query.userId, {
+                activeCount: activeChats.length,
+                totalCount: result.length,
+                includeArchived: query.includeArchived
+            });
+
+            return result.sort((a, b) => {
+                if (!a.lastActivity) return 1;
+                if (!b.lastActivity) return -1;
+                return new Date(b.lastActivity).getTime() - new Date(a.lastActivity).getTime();
+            });
+
+        } catch (error) {
+            logError('GetUserChatsQueryHandler error', error as Error);
+            return [];
+        }
+    }
+
+    private calculateUnreadMessages(chat: ChatAggregate, userId: string): number {
+        // Simple implementation - count messages from other users
+        // In production, you'd store lastSeen timestamp per user per chat
+        return chat.messages.filter(msg => msg.userid !== userId).length;
+    }
+}