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<!--
A page for testing the cloud storage module defined in this repository.
-->
<html>
<head>
<!-- Import the cloud storage module. -->
<script src='https://cdn.jsdelivr.net/gh/lurchmath/cloud-storage@v2.1/release/cloud-storage.js'></script>
<!-- Developers testing cloud-storage updates can use this line: -->
<!--
<script src='../release/cloud-storage.js'></script>
-->
<!-- We aim to test the Dropbox backend, so we need its SDK. -->
<script src='https://unpkg.com/dropbox/dist/Dropbox-sdk.min.js'>
</script>
<!-- Now that Dropbox is defined, import the Dropbox back end. -->
<script src='https://cdn.jsdelivr.net/gh/lurchmath/cloud-storage@v2/release/dropbox-backend.js'></script>
<!-- Import the LocalStorage back end. -->
<script src='https://cdn.jsdelivr.net/gh/lurchmath/cloud-storage@v2/release/localstorage-backend.js'></script>
</head>
<body>
<!--
Users will click the following buttons to test the appliaction.
"Use JSON file system" creates a simple JSON-based example
filesystem.
"Use Dropbox file system" chooses a filesystem that require the
user to log in to his/her Dropbox.
"Use LocalStorage file system" uses a flat (root folder only)
filesystem that contains no files (at first, though the user may
save some there, and they persist).
"Test opening a file" loads a file from the chosen filesystem into
the left of two text areas, showing success/failure messages in the
other text area.
"Test saving a file" saves the contents of the left text area into
the filesystem, putting success/failure messages in the other text
area.
-->
<p>
<input type='button' value='Use JSON file system'
onclick='setFileSystem(JSONFS);alert("Using JSON file system.");'/>
<input type='button' value='Use Dropbox file system'
onclick='setFileSystem(dropboxFS);alert("Using Dropbox file system.");'/>
<input type='button' value='Use LocalStorage file system'
onclick='setFileSystem(LSFS);alert("Using LocalStorage file system.");'/>
<input type='button' value='Test opening a file'
onclick='testOpenFile();'/>
<input type='button' value='Test saving a file'
onclick='testSaveFile();'/>
<input type='button' value='Test re-saving the same file'
onclick='testResaveFile();'/>
</p>
<!--
The two text areas:
-->
<textarea id='fileContents' rows=10 cols=40
>If you open a file, its text will go here.
Text you type here will be saved when you choose to save a file.</textarea>
<textarea id='messagesPane' rows=10 cols=40 readonly
>Success or failure messages will go here.</textarea>
<p>
<input type='button' value='Use dialog built into page'
onclick='toggleDialog();'/>
</p>
<iframe id='testIFrame' style='display:none;'></iframe>
<!--
Event handler scripts supporting all the controls above, with some
global variable initializations first.
-->
<script>
// Define a JSON filesystem for use when testing.
var JSONFS = JSONFileSystem( {
type : 'folder',
contents : {
'example.txt' : {
type : 'file',
contents : 'This\nis\nexample\ntext.'
},
'example.py' : {
type : 'file',
contents : 'print( "Hello world." )'
},
'example folder' : {
type : 'folder',
contents : {
'to do list.txt' : {
type : 'file',
contents : 'Wash dishes\nClean garage'
}
}
}
}
} );
// Define a Dropbox filesystem for use when testing. The
// constructor requires the app key. The code below includes
// one of my app keys. You should use yours, since my app will
// not permit redirection to your site.
var dropboxFS = new DropboxFileSystem( '7mfyk58haigi2c4' );
// Define a LocalStorage filesystem for use when testing. The
// constructor requires no parameters, so this is easy.
var LSFS = new LocalStorageFileSystem();
// When the page loads, initialize the filesystem to the
// Dropbox one. Change this code if you want to test the JSON
// filesystem instead.
window.onload = function () { setFileSystem( JSONFS ); }
// Convenience functions for reading and writing to the two
// text areas in the app.
function getEditor () {
return document.getElementById( 'fileContents' ).value;
}
function setEditor ( content ) {
document.getElementById( 'fileContents' ).value = content;
}
function setMessages ( heading, resultType, data ) {
document.getElementById( 'messagesPane' ).value =
( heading ? heading + '\n\n' : '' )
+ ( resultType ? resultType + ':\n\n' : '' )
+ ( data ? JSON.stringify( data, null, 4 ) : '' );
}
// Show or hide the built-in dialog, so the user can decide
// whether to test openFile()/saveFile() using a provided dialog
// or to make those functions create their own dialogs.
function getDialog () {
return document.getElementById( 'testIFrame' );
}
function toggleDialog () {
var dialog = getDialog();
if ( dialog.style.display == 'none' )
dialog.setAttribute( 'src', 'about:blank' );
dialog.style.display = ( dialog.style.display == 'none' ) ?
'block' : 'none';
}
// Get the dialog if and only if it's visible, otherwise yield
// null so that the test functions below will know to create
// their own dialogs.
function dialogIfVisible () {
var dialog = getDialog();
return ( dialog.style.display == 'block' ) ? dialog : null;
}
// Global variable used to store the last result of a success
// callback from any of the functions below. Necessary to
// implement the "re-save the same file" feature.
var lastFileObject = null;
// Event handler when the user clicks "Test opening a file."
// In the various success and failure callbacks, populate one or
// both of the two textareas with the results.
function testOpenFile () {
openFile( function ( chosenFile ) {
lastFileObject = chosenFile;
chosenFile.get( function ( content ) {
setMessages( 'User chose: ' + chosenFile.path, null,
'File loaded successfully' );
setEditor( content );
if ( dialogIfVisible() ) toggleDialog();
}, function ( error ) {
setMessages( 'User chose: ' + chosenFile.path,
'Error', error );
if ( dialogIfVisible() ) toggleDialog();
} );
}, function ( error ) {
lastFileObject = null;
setMessages( null, 'Error', error );
if ( dialogIfVisible() ) toggleDialog();
}, dialogIfVisible() );
}
// Event handler when the user clicks "Test saving a file."
// In the various success and failure callbacks, populate one or
// both of the two textareas with the results.
function testSaveFile () {
saveFile( function ( destination ) {
lastFileObject = destination;
destination.update( getEditor(), function ( result ) {
setMessages( 'Destination: ' + destination.path,
'Success', result );
if ( dialogIfVisible() ) toggleDialog();
}, function ( error ) {
setMessages( 'Destination: ' + destination.path,
'Error', error );
if ( dialogIfVisible() ) toggleDialog();
} );
}, function ( error ) {
lastFileObject = null;
setMessages( null, 'Error', error );
if ( dialogIfVisible() ) toggleDialog();
}, dialogIfVisible() );
}
// Event handler when the user clicks "Test re-saving the same
// file." In the various success and failure callbacks,
// populate one or both of the two textareas with the results.
function testResaveFile () {
if ( !lastFileObject ) {
setMessages( null, 'Error',
'You have not yet successfully opened or saved a '
+ ' file, and so you cannot re-save to the "same" '
+ ' location.' );
} else {
lastFileObject.update( getEditor(),
function ( result ) {
setMessages( 'Destination: '
+ lastFileObject.path,
'Success', result );
if ( dialogIfVisible() ) toggleDialog();
}, function ( error ) {
setMessages( 'Destination: '
+ lastFileObject.path,
'Error', error );
if ( dialogIfVisible() ) toggleDialog();
}
);
}
}
</script>
</body>
</html>
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