106 lines
3.3 KiB
Dart
106 lines
3.3 KiB
Dart
import 'package:flutter/foundation.dart';
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import '../../../shared/notifications/notification_service.dart';
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import '../../../shared/network/api_client.dart';
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import '../../../shared/storage/session_store.dart';
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import '../domain/contract_models.dart';
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class ContractGenerationController {
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ContractGenerationController({ApiClient? apiClient}) : _apiClient = apiClient ?? const ApiClient();
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final ApiClient _apiClient;
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final ValueNotifier<bool> isPreviewing = ValueNotifier<bool>(false);
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final ValueNotifier<bool> isGenerating = ValueNotifier<bool>(false);
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final ValueNotifier<String?> errorMessage = ValueNotifier<String?>(null);
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final ValueNotifier<ContractPreviewItem?> preview = ValueNotifier<ContractPreviewItem?>(null);
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Future<void> loadPreview({
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required String templateId,
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required Map<String, String> variableValues,
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}) async {
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final session = SessionStore.current;
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if (session == null || !session.isAuthenticated) {
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errorMessage.value = '请先登录后预览合同';
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preview.value = null;
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return;
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}
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isPreviewing.value = true;
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errorMessage.value = null;
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try {
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preview.value = await _apiClient.previewContract(
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session.accessToken,
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templateId: templateId,
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variableValues: variableValues,
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);
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} on ApiException catch (error) {
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if (error.isUnauthorized) {
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await SessionStore.clear();
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errorMessage.value = '登录已过期，请重新登录';
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} else {
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errorMessage.value = error.message;
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}
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preview.value = null;
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} catch (_) {
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errorMessage.value = '合同预览失败，请稍后重试';
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preview.value = null;
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} finally {
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isPreviewing.value = false;
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}
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}
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Future<GeneratedContractItem> generate({
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required String templateId,
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required Map<String, String> variableValues,
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String exportFormat = 'docx',
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}) async {
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final session = SessionStore.current;
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if (session == null || !session.isAuthenticated) {
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throw const ContractGenerationException('请先登录后生成合同');
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}
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isGenerating.value = true;
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errorMessage.value = null;
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try {
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final contract = await _apiClient.generateContract(
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session.accessToken,
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templateId: templateId,
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variableValues: variableValues,
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exportFormat: exportFormat,
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);
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await NotificationService.instance.notifyContractGenerated(contract);
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return contract;
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} on ApiException catch (error) {
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if (error.isUnauthorized) {
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await SessionStore.clear();
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errorMessage.value = '登录已过期，请重新登录';
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throw const ContractGenerationException('登录已过期，请重新登录');
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}
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errorMessage.value = error.message;
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throw ContractGenerationException(error.message);
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} catch (_) {
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errorMessage.value = '合同生成失败，请稍后重试';
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throw const ContractGenerationException('合同生成失败，请稍后重试');
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} finally {
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isGenerating.value = false;
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}
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}
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void dispose() {
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isPreviewing.dispose();
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isGenerating.dispose();
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errorMessage.dispose();
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preview.dispose();
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}
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}
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class ContractGenerationException implements Exception {
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const ContractGenerationException(this.message);
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final String message;
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@override
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String toString() => message;
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}
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