Phonegap Android creates a file if it does not exist and writes to it

Question

Morning

To create a file on the local file system, I use the following. This creates a file if it does not already exist.

function onDeviceReady() {
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);

}

function gotFS(fileSystem) {
        fileSystem.root.getFile("test.txt", {create: true}, gotFileEntry, fail);
    }

    function gotFileEntry(fileEntry) {
        fileEntry.createWriter(gotFileWriter, fail);
    }

    function gotFileWriter(writer) {
        writer.onwrite = function(evt) {
            alert("write success");
        };
        writer.write("We are testing")

    }

    function fail(error) {
        if(error.code == 1){
            alert('not found');
        }
        alert(error.code);
    }

However, I need to write to the file ONLY if it does not already exist. I tried to use

function gotFS(fileSystem) {
            fileSystem.root.getFile("test.txt", null, gotFileEntry, fail);
        }

function gotFS2(fileSystem) {
alert('trying again');
            fileSystem.root.getFile("test.txt", {create:true}, gotFileEntry, fail);
        }

function fail(error) {

            if(error.code == 1){
                alert('not found');
                gotFS2(fileSystem);
            }
            alert(error.code);
        }

and then calling gotFS2 if error.code == 1 but it didn’t do anything - it didn’t even create a file when it did not exist.

It seems that gotFS2 has not been called, but alert('not found');in the fail function (error) it works.

What is the easiest way to do what I'm trying to do?

Answer 1

, , fileSystem ( "gotFS" ), :

var savedFS;

function gotFS(fileSystem) {
    savedFS = fileSystem;
    fileSystem.root.getFile("test.txt", null, gotFileEntry, fail);
}

function gotFS2(fileSystem) {
    alert('trying again');
    fileSystem.root.getFile("test.txt", { create: true }, gotFileEntry, function() {});
}

function fail(error) {
    if (error.code == 1) {
        alert('not found');
        gotFS2(savedFS);
    }
    alert(error.code);
}