flutter-sport/lib/provider/search_model.dart

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:sport/services/api/inject_api.dart';

enum SearchBody {
  defaultBody,
  suggestions,
  results,
}

class SearchModel with ChangeNotifier, InjectApi {
  SearchBody _currentBody = SearchBody.defaultBody;

  SearchBody get currentBody => _currentBody;

  void updateCurrentBody(SearchBody value) {
    _currentBody = value;
    notifyListeners();
  }

  var _searchValue = '';
  List<String> hot = [];
  List<String> history = [];

  String get searchValue => _searchValue;

  final String PREF_KEY = "searchHistory";

  void updateSearchValue(String searchValue) {
    this._searchValue = searchValue;
    notifyListeners();
    updateCurrentBody(this._searchValue.isNotEmpty
        ? SearchBody.suggestions
        : SearchBody.defaultBody);
  }

  void queryValue(String value) async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    if (history == null) history = [];
    if (!history.contains(value)) {
      List<String> items = history
        ..insert(0, value)
        ..sublist(0, min(10, history.length));
      prefs.setStringList(PREF_KEY, items);
    }
    _searchValue = value;
    updateCurrentBody(SearchBody.results);
  }

  void suggestionValue(String value) {
    updateCurrentBody(SearchBody.suggestions);
  }

  void getHistory() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    history = prefs.getStringList(PREF_KEY) ?? [];
    notifyListeners();
  }

  void getHot() async {
    hot = (await api.getSearchWords()).results;
    hot.shuffle();
    notifyListeners();
  }

  void clearHistory() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    prefs.setStringList(PREF_KEY, []);
    history = [];
    notifyListeners();
  }
}