fcs/lib/pages/user_search_page.dart

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/user_model.dart';
import 'package:fcs/fcs/common/theme.dart';
import 'package:fcs/vo/user.dart';

import 'user_editor.dart';

Future<User> showUserPlacesSearch(BuildContext context) async =>
    await showSearch<User>(
      context: context,
      delegate: UserSearchDelegate(),
    );

class UserSearchDelegate extends SearchDelegate<User> {
  @override
  ThemeData appBarTheme(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return theme.copyWith(
      inputDecorationTheme: InputDecorationTheme(
          hintStyle: TextStyle(
              color: theme.primaryTextTheme.title.color, fontSize: 16)),
      primaryColor: primaryColor,
      primaryIconTheme: theme.primaryIconTheme.copyWith(color: Colors.white),
      primaryColorBrightness: Brightness.light,
      primaryTextTheme: theme.textTheme,
      textTheme: theme.textTheme.copyWith(
          title: theme.textTheme.title.copyWith(
              color: theme.primaryTextTheme.title.color, fontSize: 16)),
    );
  }

  @override
  List<Widget> buildActions(BuildContext context) {
    return [
      IconButton(
        icon: Icon(Icons.clear),
        onPressed: () => query = '',
      ),
    ];
  }

  @override
  Widget buildLeading(BuildContext context) {
    return IconButton(
      icon: Icon(Icons.arrow_back),
      onPressed: () => close(context, null),
    );
  }

  @override
  Widget buildResults(BuildContext context) {
    final userModel = Provider.of<UserModel>(context);
    return FutureBuilder(
        future: userModel.searchUser(query),
        builder: (context, AsyncSnapshot<List<User>> snapshot) {
          if (snapshot.hasData) {
            if (snapshot.data.length == 0) {
              return Container(
                child: Center(
                  child: Text(
                    "Error :No Search User",
                    textAlign: TextAlign.center,
                  ),
                ),
              );
            }
            return Container(
              padding: EdgeInsets.only(top: 15),
              child: ListView(
                children: snapshot.data.map((u) => UserRow(user: u)).toList(),
              ),
            );
          } else if (snapshot.hasError) {
            return Container(
              child: Center(
                child: Text(
                  '${snapshot.error}',
                  textAlign: TextAlign.center,
                ),
              ),
            );
          } else {
            return Container(
              child: Center(
                child: CircularProgressIndicator(
                    valueColor:
                        new AlwaysStoppedAnimation<Color>(primaryColor)),
              ),
            );
          }
        });
  }

  @override
  Widget buildSuggestions(BuildContext context) {
    return Container(
      child: Center(
        child: Opacity(
            opacity: 0.2,
            child: Icon(
              Icons.supervised_user_circle,
              size: 200,
            )),
      ),
    );
  }
}

class UserRow extends StatefulWidget {
  final User user;
  const UserRow({Key key, this.user}) : super(key: key);

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

class _UserRowState extends State<UserRow> {
  var dateFormatter = new DateFormat('dd MMM yyyy - hh:mm:ss a');

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(left: 15, right: 15),
      child: Card(
        elevation: 10,
        color: Colors.white,
        child: InkWell(
          onTap: () {
            Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (context) => UserEditor(user: widget.user)),
            );
          },
          child: Row(
            children: <Widget>[
              Expanded(
                child: new Padding(
                  padding: const EdgeInsets.symmetric(vertical: 7.0),
                  child: new Row(
                    children: <Widget>[
                      new Padding(
                        padding:
                            new EdgeInsets.symmetric(horizontal: 20.0 - 15 / 2),
                        child: Icon(
                          Icons.account_circle,
                          color: primaryColor,
                          size: 55,
                        ),
                      ),
                      Column(
                        mainAxisAlignment: MainAxisAlignment.start,
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: <Widget>[
                          new Text(
                            widget.user.name == null ? "" : widget.user.name,
                            style: new TextStyle(
                                fontSize: 16.0, color: Colors.black),
                          ),
                          new Text(
                            widget.user.phone == null ? "" : widget.user.phone,
                            style: new TextStyle(
                                fontSize: 14.0, color: Colors.grey),
                          ),
                          widget.user.device == null
                              ? Text("No login",
                                  style: TextStyle(color: Colors.red))
                              : Text("last active",
                                  style: TextStyle(color: Colors.green)),
                          Text(
                              "${widget.user.device == null ? "" : widget.user.device}",
                              style: TextStyle(fontSize: 11)),
                          Text(
                              "${widget.user.lastActiveTime == null ? "" : dateFormatter.format(widget.user.lastActiveTime)}")
                        ],
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}