harperdb 0.0.3

A flutter SDK for accessing HarperDB Studio easily, The package bridges the gap between the HarperDB cloud API database and the flutter framework. it gives the option to define details of your databas [...]

example/lib/main.dart

//This is called depending on the platform app, it could be cupertino for ios and material for dart, This is totally at your discretion
import 'package:flutter/material.dart';
// This is a necessary file to call our custom functions from the HarperDB package
import 'package:harperdb/harperdb.dart';


void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomeScreen(),
    );
  }
}

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

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  
  // This is your Url global variable
const String HDB_URL = 'http://localhost:9925';
  // This is a global variable for your username
const String HDB_USER = 'HDB_ADMIN';
  // This is a global variable for your password
const String HDB_PASSWORD = 'password';
  
  
  //This handles your return type, it could be either a List for search queries or an Map for queries that insert 
  late List harperData;
  
  //Just a future called harperAPI
  late Future harperAPI;

  // This has to be a future function as it would wait for data from the API
  // The return type for the function varies, it can either be a Map or a List depending on the operation you are carrying out

  Future //function type is stated as a future
    <List> // the fucntion will return future in this case but it can also be set to map in other cases, all you have to do is change <List> to <Map<String, dynamic>>
    loadData() //the function name
    async  // it has to be asynchronous
  {
    var show = await harperDB( //A variable called show is assigned the result ot the function 
      HDB_URL,
      HDB_USER,
      HDB_PASSWORD,
      {
        "operation": "sql",
        "sql": "select * from dev.dog"
      },
    );
    //this shows you if the query ran properly. The result of your search will be shown in the terminal
    debugPrint(
      show.toString(),
    );
    //set the result of the query to your list which will be returned
    setState(() {
      harperData = show;
    });
    // the function type which was stated must be returned
    return harperData;
  }

  //Initialize your function so it runs as the page opens up
  @override
  void initState() {
    
    harperAPI = loadData();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: FutureBuilder(// the widget is used to show data after it has gotten the result
        future: harperAPI,
        builder: (BuildContext context, AsyncSnapshot snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) { //This block of code states what is to happen while waiting for the result from the database, in this case it is meant to show a circular progress widget
            return const Center(child: CircularProgressIndicator());
          }
          else if (snapshot.connectionState == ConnectionState.done) { //This block of code explains what to do when it has gotten the data from the database
            return ListView.builder(
              itemCount: harperData.length,
              itemBuilder: (context, index) {
                return ListTile(
                  leading: Text(
                    harperData[index]['dog_name'],
                  ),
                  title: Text(
                    harperData[index]['owner_name'],
                    textAlign: TextAlign.center,
                  ),
                  trailing: Text(
                    harperData[index]['dog_age'].toString(),
                  ),
                );
              },
            );
          }
          else { //This block of code will tell what to do if theres an error 
            return const Center(
                child: Text("Something went wrong."));
          }
        },
      ),
    );
  }
}