ModelOfTheTime/lib/views/learned.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_slidable/flutter_slidable.dart';
import 'package:http/http.dart';
import 'package:model_of_the_times/requester/requester.dart';
import 'package:model_of_the_times/utils/toast.dart';
import 'package:model_of_the_times/views/common/data_required.dart';
import 'package:model_of_the_times/views/common/full_paged_struct.dart';

class Learned extends StatefulWidget {
  const Learned({super.key});

  @override
  State<Learned> createState() => _LearnedState();
}

class _LearnedState extends State<Learned> with SingleTickerProviderStateMixin {
  late final TabController _controller;
  int _index = 0;
  List<Widget> items = [
    const Testimonials(),
    const LearnHistory()
  ];
  @override
  void initState() {
    super.initState();
    _controller = TabController(length: 2, vsync: this);
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: TabBar(
        controller: _controller,
        indicatorSize: TabBarIndicatorSize.tab,
        labelPadding: const EdgeInsetsDirectional.all(10),
        tabs: const [
          Text("学习感言"),
          Text("学习历史"),
        ],
        onTap: (e){
          setState(() {
            _index = e;
          });
        },
      ),
      body: items[_index],
      floatingActionButton: _index == 0 ? FloatingActionButton.extended(onPressed: (){Navigator.push(context, MaterialPageRoute(builder: (BuildContext context) { return const AddTestimonials(); }));}, shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)), label: const Text("新建感言")) : null,
      floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
    );
  }
}

class Testimonial extends StatefulWidget {
  final int id;
  final String title;
  final String content;
  final GlobalKey<DataRequiredState> parentKey;
  const Testimonial({super.key, required this.id, required this.title, required this.content, required this.parentKey});

  @override
  State<Testimonial> createState() => _TestimonialState();
}

class _TestimonialState extends State<Testimonial> {
  @override
  Widget build(BuildContext context) {
    return Slidable(
      endActionPane: ActionPane(
        motion: const ScrollMotion(),
        children: [
          SlidableAction(
            onPressed: (e){
              var req = GlobalInformation.getInstance().requester;
              req.get(resolve("/appStudy/app/deleteStatement?id=${widget.id}")).then((value) {
                var data = jsonFromResponse(value);
                if (data['code'] == 200){
                  widget.parentKey.currentState?.update();
                  return;
                }
                if (context.mounted){
                  toast("message", context);
                }
              });
            },
            backgroundColor: Colors.red,
            label: "删除",
            spacing: 1,
          )
        ]
      ),
      child: Card(
        child: Padding(padding: const EdgeInsets.all(10), child: ListTile(
          title: Text(
              widget.title
          ),
          subtitle: Text(
            widget.content,
            maxLines: 3,
            overflow: TextOverflow.ellipsis,
          ),
        )),
      )
    );
  }
}



class Testimonials extends StatefulWidget {
  const Testimonials({super.key});

  @override
  State<Testimonials> createState() => _TestimonialsState();
}

class _TestimonialsState extends State<Testimonials> {
  final GlobalKey<DataRequiredState> _key = GlobalKey();
  @override
  Widget build(BuildContext context) {
    return DataRequired(
      key: _key,
      fetchData: (global) async {
        var response = await global.requester.get(resolve("/appStudy/app/statementList"));
        return jsonFromResponse(response);
      },
      afterLoading: (data) {
        return ListView(
          children: data['rows'].map<Widget>((e){
            var content = e['content'];
            var id = e['id'];
            var title = e['title'];
            return Testimonial(id: id, title: title, content: content, parentKey: _key);
          }).toList()
        );
      }
    );
  }
}

class TestimonialsEditor extends StatefulWidget {
  final String defaultTitle;
  final String defaultContent;
  const TestimonialsEditor({super.key, this.defaultContent = "", this.defaultTitle = ""});

  @override
  State<TestimonialsEditor> createState() => _TestimonialsEditorState();
}

class _TestimonialsEditorState extends State<TestimonialsEditor> {
  final _formKey = GlobalKey<FormState>();
  late String _title;
  late String _content;
  @override
  void initState() {
    super.initState();
    _title = widget.defaultTitle;
    _content = widget.defaultContent;
  }
  @override
  Widget build(BuildContext context) {
    return Form(
      key: _formKey,
      child: ListView(
        children: [
          TextFormField(
            initialValue: _title,
            decoration: const InputDecoration(
              labelText: "标题"
            ),
            validator: (value){
              if (value == null || value.isEmpty){
                return "请输入标题";
              }
              return null;
            },
            onSaved: (value) {if (value != null){_title = value;}},
          ),
          TextFormField(
            initialValue: _content,
            decoration: const InputDecoration(
              labelText: "内容"
            ),
            validator: (value) {
              if (value == null || value.isEmpty){
                return "请输入内容";
              }
              return null;
            },
            onSaved: (value) {if (value != null){_content = value;}},
          ),
          SizedBox.fromSize(size: const Size.fromHeight(20),),
          ElevatedButton(
            onPressed: () async {
              if (_formKey.currentState == null){
                return;
              }
              if (!_formKey.currentState!.validate()) {
                return;
              }
              _formKey.currentState!.save();
              var global = GlobalInformation.getInstance();
              var createUri = resolve("appStudy/app/createStatement");
              var req = MultipartRequest("POST", createUri);
              req.fields.addAll({"title": _title, "content": _content, "picPath": ""});
              var result = await global.requester.send(req);
              var data = await jsonFromStreamResponse(result);
              if (context.mounted){
                if (data['code'] != 200){
                  toast("添加失败，请重试！", context);
                }
                Navigator.pop(context);
              }
            },
            child: const Text("提交")
          )
        ],
      ),
    );
  }
}


class AddTestimonials extends StatefulWidget {
  const AddTestimonials({super.key});

  @override
  State<AddTestimonials> createState() => _AddTestimonialsState();
}

class _AddTestimonialsState extends State<AddTestimonials> {
  @override
  Widget build(BuildContext context) {
    return const FullPagedStruct(title: "新建感言", child: TestimonialsEditor());
  }
}



class LearnHistory extends StatefulWidget {
  const LearnHistory({super.key});

  @override
  State<LearnHistory> createState() => _LearnHistoryState();
}

class _LearnHistoryState extends State<LearnHistory> {
  @override
  Widget build(BuildContext context) {
    return DataRequired(
      fetchData: (global) async {
        var req = global.requester;
        var historyResponse = await req.get(resolve("/appStudy/app/historyList"));
        return jsonFromResponse(historyResponse);
      },
      afterLoading: (data){
        if (kDebugMode) {
          print(data);
        }
        return ListView();
      }
    );
  }
}