Sonnat/lib/features/posts/widgets/search_widget.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:sonnat/core/extensions/context_extension.dart';
import 'package:sonnat/core/extensions/string_extension.dart';
import 'package:sonnat/core/language/translator.dart';
import 'package:sonnat/core/utils/app_constants.dart';

class SearchWidget extends StatefulWidget {
  final Function(String query) search;

  const SearchWidget({super.key, required this.search});

  @override
  State<SearchWidget> createState() => _SearchWidgetState();
}

class _SearchWidgetState extends State<SearchWidget> {
  final TextEditingController _controller = TextEditingController();

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 49 * context.height / AppConstants.instance.appHeight,
      child: TextFormField(
        autofocus: false,
        maxLength: 300,
        controller: _controller,
        onChanged: (value) {
          Debounce.debounce('search_query', const Duration(milliseconds: 1000), () {
            widget.search(_controller.text.trim());
          });
        },
        maxLines: 10,
        minLines: 4,
        style: const TextStyle(
          color: Color(0xff8D95AB),
          fontSize: 10,
        ),
        decoration: InputDecoration(
          fillColor: const Color(0xffF4F4F8),
          contentPadding: const EdgeInsets.symmetric(
            vertical: 15,
            horizontal: 18,
          ),
          hintText: Translator.translate('search'),
          filled: true,
          counterText: '',
          hintStyle: const TextStyle(
            color: Color(0xff8D95AB),
            fontSize: 10,
          ),
          enabledBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(19),
            borderSide: const BorderSide(color: Colors.transparent),
          ),
          suffixIcon: GestureDetector(
            onTap: () {
              _controller.text = '';
              widget.search.call(_controller.text.trim());
            },
            child: Padding(
              padding: const EdgeInsetsDirectional.only(end: 3, bottom: 4, top: 4),
              child: SvgPicture.asset('ic_clear'.svgPath),
            ),
          ),
          focusedBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(19),
            borderSide: const BorderSide(color: Colors.transparent),
          ),
        ),
      ),
    );
  }
}

class Debounce {
  static final Map<String, Timer> _timers = {};

  static void debounce(String tag, Duration duration, Function onExecute) {
    if (duration == Duration.zero) {
      _timers[tag]?.cancel();
      _timers.remove(tag);
      onExecute();
    } else {
      _timers[tag]?.cancel();
      _timers[tag] = Timer(duration, () {
        _timers[tag]?.cancel();
        _timers.remove(tag);
        onExecute();
      });
    }
  }

  static void cancel(String tag) {
    _timers[tag]?.cancel();
    _timers.remove(tag);
  }
}