yuqei
3df85fdb04
Includes legal document generation workflows, prompt governance runtime wiring, legal change impact scans, operation KPI dashboards, invoice files, sales follow-up events, mobile review polish, deployment automation, and updated project docs.
392 lines
14 KiB
Dart
392 lines
14 KiB
Dart
import 'package:flutter/material.dart';
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import '../../../shared/widgets/app_scaffold_page.dart';
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import '../../../shared/widgets/app_section_card.dart';
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import '../application/contract_generation_controller.dart';
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import '../domain/contract_models.dart';
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import '../domain/contract_review_context.dart';
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import 'generated_contract_result_screen.dart';
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class ContractBuilderScreen extends StatefulWidget {
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const ContractBuilderScreen({
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super.key,
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required this.template,
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this.reviewContext,
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this.initialVariableValues,
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this.initialExportFormat = 'docx',
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});
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final ContractTemplateItem template;
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final ContractReviewContext? reviewContext;
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final Map<String, String>? initialVariableValues;
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final String initialExportFormat;
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@override
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State<ContractBuilderScreen> createState() => _ContractBuilderScreenState();
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}
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class _ContractBuilderScreenState extends State<ContractBuilderScreen> {
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final ContractGenerationController _controller =
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ContractGenerationController();
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final Map<String, TextEditingController> _fieldControllers =
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<String, TextEditingController>{};
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late String _exportFormat;
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@override
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void initState() {
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super.initState();
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_exportFormat = widget.initialExportFormat;
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for (final variable in widget.template.variables) {
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_fieldControllers[variable.name] = TextEditingController(
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text: _buildInitialValue(variable),
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);
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}
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}
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String _buildInitialValue(ContractTemplateVariable variable) {
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final restoredValue = widget.initialVariableValues?[variable.name];
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if (restoredValue != null && restoredValue.trim().isNotEmpty) {
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return restoredValue;
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}
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final reviewContextValue = buildReviewContextVariableValue(
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variable.name,
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variable.label,
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variable.description,
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widget.reviewContext,
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);
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if (reviewContextValue.isNotEmpty) {
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return reviewContextValue;
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}
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return variable.defaultValue;
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}
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@override
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void dispose() {
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_controller.dispose();
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for (final controller in _fieldControllers.values) {
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controller.dispose();
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}
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super.dispose();
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}
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Map<String, String> get _variableValues {
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return _fieldControllers.map(
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(key, value) => MapEntry(key, value.text.trim()),
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);
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}
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String? _validateRequiredFields() {
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for (final variable in widget.template.variables) {
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if (variable.required) {
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final value = _fieldControllers[variable.name]?.text.trim() ?? '';
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if (value.isEmpty) {
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return '请先填写“${variable.label}”。';
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}
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}
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}
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return null;
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}
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Future<void> _preview() async {
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final validationError = _validateRequiredFields();
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if (validationError != null) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(validationError)),
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);
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return;
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}
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await _controller.loadPreview(
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templateId: widget.template.id,
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variableValues: _variableValues,
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);
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final error = _controller.errorMessage.value;
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if (!mounted || error == null || error.isEmpty) {
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return;
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}
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(error)),
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);
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}
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Future<void> _generate() async {
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final validationError = _validateRequiredFields();
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if (validationError != null) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(validationError)),
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);
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return;
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}
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try {
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final contract = await _controller.generate(
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templateId: widget.template.id,
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variableValues: _variableValues,
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exportFormat: _exportFormat,
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);
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if (!mounted) {
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return;
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}
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await Navigator.of(context).push(
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MaterialPageRoute<void>(
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builder: (_) => GeneratedContractResultScreen(contract: contract),
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),
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);
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} on ContractGenerationException catch (error) {
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if (!mounted) {
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return;
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}
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(error.message)),
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);
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}
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}
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@override
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Widget build(BuildContext context) {
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final template = widget.template;
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return Scaffold(
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appBar: AppBar(
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title: Text(template.name),
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),
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body: ListView(
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padding: EdgeInsets.zero,
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children: [
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AppScaffoldPage(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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AppSectionCard(
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title: '模板信息',
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subtitle: '先确认模板说明，再填写变量并预览生成结果。',
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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_InfoLine(label: '合同类型', value: template.contractType),
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if (template.description.isNotEmpty) ...[
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const SizedBox(height: 12),
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_InfoLine(label: '模板说明', value: template.description),
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],
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if (template.previewExcerpt.isNotEmpty) ...[
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const SizedBox(height: 12),
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_InfoLine(
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label: '预览摘要', value: template.previewExcerpt),
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],
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],
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),
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),
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if (widget.reviewContext != null) ...[
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const SizedBox(height: 16),
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AppSectionCard(
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title: '审查上下文已带入',
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subtitle: '系统已尝试把审查意见、风险项和建议动作预填到匹配变量中，你可以继续编辑后再生成。',
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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_InfoLine(
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label: '审查任务',
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value: widget.reviewContext!.reviewTitle ?? '-'),
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const SizedBox(height: 12),
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_InfoLine(
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label: '合同类型',
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value: widget.reviewContext!.contractType ?? '-'),
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const SizedBox(height: 12),
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_InfoLine(
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label: '总体风险',
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value: widget.reviewContext!.overallRisk ?? '-'),
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if (widget.reviewContext!.reviewOpinion != null &&
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widget
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.reviewContext!.reviewOpinion!.isNotEmpty) ...[
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const SizedBox(height: 12),
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_InfoLine(
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label: '审查意见',
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value: widget.reviewContext!.reviewOpinion!),
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],
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],
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),
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),
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],
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const SizedBox(height: 16),
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AppSectionCard(
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title: '变量填写',
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subtitle: '优先填写必填变量，确认导出格式后再预览和生成。',
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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for (final variable in template.variables) ...[
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TextField(
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controller: _fieldControllers[variable.name],
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minLines: variable.description.length > 24 ? 2 : 1,
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maxLines: variable.description.length > 24 ? 3 : 1,
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decoration: InputDecoration(
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labelText: variable.required
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? '${variable.label} *'
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: variable.label,
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hintText: variable.description.isNotEmpty
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? variable.description
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: null,
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),
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),
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if (variable != template.variables.last)
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const SizedBox(height: 12),
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],
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const SizedBox(height: 16),
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DropdownButtonFormField<String>(
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initialValue: _exportFormat,
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decoration: const InputDecoration(
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labelText: '导出格式',
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),
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items: const <DropdownMenuItem<String>>[
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DropdownMenuItem<String>(
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value: 'docx', child: Text('Word (.docx)')),
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DropdownMenuItem<String>(
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value: 'pdf', child: Text('PDF (.pdf)')),
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DropdownMenuItem<String>(
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value: 'html', child: Text('HTML (.html)')),
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DropdownMenuItem<String>(
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value: 'txt', child: Text('文本 (.txt)')),
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],
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onChanged: (value) {
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if (value == null) {
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return;
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}
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setState(() {
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_exportFormat = value;
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});
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},
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),
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],
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),
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),
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const SizedBox(height: 16),
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ValueListenableBuilder<ContractPreviewItem?>(
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valueListenable: _controller.preview,
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builder: (context, preview, _) {
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if (preview == null) {
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return const SizedBox.shrink();
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}
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return Column(
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children: [
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AppSectionCard(
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title: '合同预览',
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subtitle: '这里只是生成前预览，不会写入正式合同记录。',
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (preview.variableSummary.isNotEmpty) ...[
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for (final item in preview.variableSummary) ...[
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_InfoLine(
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label: item.label,
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value: item.valuePreview.isEmpty
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? '(空)'
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: item.valuePreview,
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),
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if (item != preview.variableSummary.last)
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const SizedBox(height: 12),
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],
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const SizedBox(height: 16),
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],
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Text(preview.previewContent),
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const SizedBox(height: 16),
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_InfoLine(
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label: '当前导出格式',
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value: _exportFormat.toUpperCase()),
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],
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),
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),
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const SizedBox(height: 16),
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],
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);
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},
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),
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ValueListenableBuilder<String?>(
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valueListenable: _controller.errorMessage,
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builder: (context, message, _) {
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if (message == null || message.isEmpty) {
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return const SizedBox.shrink();
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}
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return Padding(
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padding: const EdgeInsets.only(bottom: 16),
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child: Text(
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message,
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style: TextStyle(
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color: Theme.of(context).colorScheme.error),
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),
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);
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},
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),
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Row(
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children: [
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Expanded(
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child: ValueListenableBuilder<bool>(
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valueListenable: _controller.isPreviewing,
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builder: (context, isPreviewing, _) {
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return OutlinedButton.icon(
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onPressed: isPreviewing ? null : _preview,
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icon: isPreviewing
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? const SizedBox(
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width: 16,
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height: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2),
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)
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: const Icon(Icons.visibility_outlined),
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label: Text(isPreviewing ? '预览中...' : '预览合同'),
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);
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},
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),
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),
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const SizedBox(width: 12),
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Expanded(
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child: ValueListenableBuilder<bool>(
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valueListenable: _controller.isGenerating,
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builder: (context, isGenerating, _) {
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return FilledButton.icon(
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onPressed: isGenerating ? null : _generate,
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icon: isGenerating
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? const SizedBox(
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width: 16,
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height: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2),
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)
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: const Icon(Icons.auto_awesome),
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label: Text(isGenerating ? '生成中...' : '生成合同'),
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);
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},
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),
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),
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],
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),
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],
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),
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),
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],
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),
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);
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}
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}
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class _InfoLine extends StatelessWidget {
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const _InfoLine({
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required this.label,
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required this.value,
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});
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final String label;
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final String value;
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@override
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Widget build(BuildContext context) {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(label, style: Theme.of(context).textTheme.labelLarge),
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const SizedBox(height: 4),
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Text(value.isEmpty ? '-' : value),
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],
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);
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}
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}
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