<!DOCTYPE html>
<html lang="en">
<head>
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js">
</script>
<script src= "https://www.gstatic.com/firebasejs/3.7.4/firebase.js">
</script>
<title>Managing Firebase data</title>
</head>
<body>
<center>Managing Firebase Data</center>
<form id="contact">
ID: <input type="text" size="3" id="ID" value="1" />
Name: <input type="text" size="30" id="name" value="Poke Mon" />
Email: <input type="email" size="30" id="email" value="poke@example.com" />
<p id="result">[result]</p>
<button type="submit" onClick="addUser( ); return false;">Add a user
</button> (required: ID, name, email)
<button type="submit" onClick="showUser( ); return false;">Show a user
</button> (required: ID)
<button type="submit" onClick="showAll( ); return false;">Show all users
</button>
<button type="submit" onClick="deleteUser( ); return false;">Delete a user
</button> (required: ID)
<button type="submit" onClick="deleteDB( ); return false;">Delete the database
</button>
<button type="submit" onClick="updateUser( ); return false;">Update a user
</button> (required: ID)
<button type="reset">Reset</button>
</form>
<script type="module">
// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = {
apiKey: "AIzaSyB🟦98e04OlRJe🟦4Gs0jXFgNgVPfijfDwjk",
authDomain: "fir-20-68820.firebaseapp.com",
databaseURL: "https://fir-20-68820-default-rtdb.firebaseio.com",
projectId: "fir-20-68820",
storageBucket: "fir-20-68820.appspot.com",
messagingSenderId: "506458698814",
appId: "1:506458698814:web:9f8b957ed06e413e9a0d6f",
measurementId: "G-3LBG0YT669"
};
// Initialize Firebase
firebase.initializeApp( firebaseConfig );
var usersRef = firebase.database( ).ref( 'users/' );
</script>
<script>
//
// Add a user.
//
function addUser( ) {
// Get the input values.
var ID = getInputVal( 'ID' );
var name = getInputVal( 'name' );
var email = getInputVal( 'email' );
firebase.database( ).ref( 'users/' + ID ).set( {
name: name,
email: email
} );
var out = "Added: " + ID + ": " + name + ", " + email;
document.getElementById( 'result' ).innerHTML = out;
return( false );
}
//
// Function to get form values
//
function getInputVal( input ) {
return document.getElementById( input ).value;
}
//
// Show a user.
//
function showUser( ) {
var ID = getInputVal( 'ID' );
var ref = firebase.database( ).ref( 'users/' + ID );
ref.on( "value",
function( snapshot ) {
const data = snapshot.val( );
var out = "ID: " + ID + "Name: " + Object.values(data)[1];
out += "Email: " + Object.values(data)[0];
document.getElementById( 'result' ).innerHTML = out;
},
function ( error ) {
document.getElementById( 'result' ).innerHTML = "Error"; }
);
return( false );
}
//
// Show all users.
//
function showAll( ) {
var ref = firebase.database( ).ref( 'users/' );
ref.on( "value", snapshot => {
var out = "";
snapshot.forEach( child => {
out += "ID: " + child.key;
var ref1 = firebase.database( ).ref( 'users/' + child.key );
ref1.on( "value", snapshot => {
snapshot.forEach( child => {
out += child.key + ": " + child.val( );
} )
} )
} )
document.getElementById( 'result' ).innerHTML = out;
} )
return( false );
}
//
// Delete a user (delete is a reserved word).
//
function deleteUser( ) {
var ID = getInputVal( 'ID' );
var userRef = firebase.database( ).ref( 'users/' + ID );
userRef.remove( );
var out = "User # " + ID + " deleted";
document.getElementById( 'result' ).innerHTML = out;
return( false );
}
//
// Delete the database users (delete is a reserved word).
//
function deleteDB( ) {
var userRef = firebase.database( ).ref( 'users/' );
userRef.remove( );
var out = "Database users deleted";
document.getElementById( 'result' ).innerHTML = out;
return( false );
}
//
// Update a user.
//
function updateUser( ) {
// Get the input values.
var ID = getInputVal( 'ID' );
var name2 = getInputVal( 'name' );
var email2 = getInputVal( 'email' );
var name3 = "";
var email3 = "";
var ref = firebase.database( ).ref( 'users/' + ID );
ref.on( "value",
function( snapshot ) {
const data = snapshot.val( );
name3 = Object.values(data)[1];
email3 = Object.values(data)[0];
if ( name2 ) { name3 = name2; }
if ( email2 ) { email3 = email2; }
ref.set( { name: name3, email: email3 } );
var out = ID + ": " + name3 + ", " + email3;
document.getElementById( 'result' ).innerHTML = out;
},
function ( error ) {
document.getElementById( 'result' ).innerHTML = "Error"; }
)
return( false );
}
</script>
</body>
</html>
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“You cannot teach a man anything, you can only help him find it within himself.” ― Galileo |