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