ltx-flutter/ltx_flutter/lib/pages/categories_page.dart

import 'package:ltx_flutter/appwrite/categories_api.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';

class CategoriesPage extends StatefulWidget {
  const CategoriesPage({Key? key}) : super(key: key);

  @override
  _CategoriesPageState createState() => _CategoriesPageState();
}

class _CategoriesPageState extends State<CategoriesPage> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        onPressed: () => Navigator.push(
          context,
          MaterialPageRoute(
            builder: (context) => NewCategoryPage(category: CategoryData()),
          ),
        ),
        tooltip: "New Category",
        child: Icon(Icons.add),
      ),
      body: Consumer<CategoriesAPI>(builder: (context, categories, child) {
        return ListView.builder(
          itemCount: categories.total + 1,
          itemBuilder: (context, i) {
            if (i < categories.total) {
              Category category = categories.get(i);
              if (!category.hasParent() && category.number != 0) {
                return Column(
                  children: [
                    Divider(
                      height: 0,
                      thickness: 2,
                    ),
                    category.number == -1
                        ? SizedBox.shrink()
                        : CategoryRow(category: category),
                  ],
                );
              }

              return CategoryRow(category: category);
            }
            return null;
          },
        );
      }),
    );
  }
}

class CategoryRow extends StatelessWidget {
  const CategoryRow({
    super.key,
    required this.category,
  });

  final Category category;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onLongPress: () {
        Navigator.push(
          context,
          MaterialPageRoute(
              builder: (context) => NewCategoryPage(
                    category: category.data(),
                  )),
        );
      },
      child: Row(
        children: [
          Container(
            constraints: BoxConstraints(maxHeight: 100),
            color: category.backgroundColor,
            child: SizedBox.expand(
              child: Center(
                  child: Text(
                      style: TextStyle(
                        fontWeight: FontWeight.bold,
                        color: category.foregroundColor,
                        fontSize: 18,
                      ),
                      category.number.toString())),
            ),
          ),
          Expanded(
            child: Padding(
              padding: EdgeInsets.only(left: category.leftPadding()),
              child: Text(
                style: TextStyle(
                  fontSize: 17,
                ),
                category.name,
              ),
            ),
          ),
          Expanded(
            child: Padding(
              padding: const EdgeInsets.all(15.0),
              child: Text(
                style: TextStyle(
                  fontSize: 13,
                  color: Colors.white38,
                ),
                "${category.description}",
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class NewCategoryPage extends StatefulWidget {
  const NewCategoryPage({Key? key, required this.category}) : super(key: key);

  final CategoryData category;

  @override
  State<NewCategoryPage> createState() => _NewCategoryPageState();
}

class _NewCategoryPageState extends State<NewCategoryPage> {
  String _name = "";
  bool _isNew = true;
  final _formKey = GlobalKey<FormBuilderState>();

  @override
  void initState() {
    super.initState();
    _isNew = true;
  }

  @override
  Widget build(BuildContext context) {
    if (widget.category.number != null) {
      _isNew = false;
    }
    _name = _isNew ? "New Category" : "Edit Category";

    final CategoriesAPI api = context.watch<CategoriesAPI>();
    saveCategory(form, context) {
      var name = form?.fields['categoryName'].value;
      var number = form?.fields['categoryNumber'].value;
      var color = form?.fields['categoryColor'].value;
      var description = form?.fields['categoryDescription'].value;
      var parent = form?.fields['categoryParent'].value;

      if (_isNew) {
        api.addCategory(
          name: name,
          number: double.parse(number),
          color: color,
          description: description,
          parentId: int.parse(parent),
        );
      } else {
        api.updateCategory(
          name: name,
          number: double.parse(number),
          color: color,
          description: description,
          parentId: int.parse(parent),
        );
      }
      Navigator.pop(context);
    }

    return Scaffold(
      appBar: AppBar(
        title: Text(_name),
      ),
      body: Padding(
        padding: const EdgeInsets.only(left: 50, right: 50),
        child: Column(
          children: [
            FormBuilder(
              key: _formKey,
              child: Column(
                children: [
                  SizedBox(height: 25),
                  FormBuilderTextField(
                    keyboardType: TextInputType.number,
                    decoration: InputDecoration(
                      labelText: "Number",
                    ),
                    name: 'categoryNumber',
                    initialValue: widget.category.number.toString(),
                  ),
                  SizedBox(height: 25),
                  FormBuilderTextField(
                    decoration: InputDecoration(
                      labelText: "Name",
                    ),
                    name: 'categoryName',
                    initialValue: widget.category.name,
                  ),
                  SizedBox(height: 25),
                  Consumer<CategoriesAPI>(
                    builder: (context, categories, child) {
                      return FormBuilderDropdown(
                        decoration: InputDecoration(
                          labelText: "Color",
                        ),
                        initialValue: widget.category.color,
                        items: [
                          for (var c in categories.colors)
                            DropdownMenuItem(
                              value: c.hex,
                              child: Container(
                                decoration:
                                    BoxDecoration(color: c.backgroundColor()),
                                padding: EdgeInsets.all(20),
                                child: Text(
                                  c.name(),
                                  style: TextStyle(color: c.foregroundColor()),
                                ),
                              ),
                            )
                        ],
                        name: 'categoryColor',
                      );
                    },
                  ),
                  SizedBox(height: 25),
                  FormBuilderTextField(
                    name: 'categoryDescription',
                    initialValue: widget.category.description,
                    decoration: InputDecoration(
                      labelText: "Description",
                    ),
                  ),
                  SizedBox(height: 25),
                  FormBuilderTextField(
                    keyboardType: TextInputType.number,
                    name: 'categoryParent',
                    initialValue: widget.category.parent.toString(),
                    decoration: InputDecoration(
                      labelText: "Parent",
                    ),
                  ),
                ],
              ),
            ),
            SizedBox(height: 40),
            OutlinedButton(
              onPressed: () => saveCategory(_formKey.currentState, context),
              child: Text("Save"),
            ),
          ],
        ),
      ),
    );
  }
}