testWriteApp/index.html at master · chdenizard/testWriteApp · GitHub

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<html>
    <head>
        <meta name="viewport" content="user-scalable=no,initial-scale=1,
maximum-scale=1,minimum-scale=1, width=device-width" />
        <title>PhoneGap App</title>
        <script src="js/jquery-1.11.3.js"></script>
        <!-- <script type="text/javascript" src="js/cordova-2.0.0.js"></script> -->
        <script type="text/javascript" src="cordova.js"></script>
        <script type="text/javascript">

document.addEventListener("deviceready", dispositivopronto, false);

function dispositivopronto(){
    alert ("Device ID:"+device.uuid);
}
    document.addEventListener("backbutton", function(e){
        if($.mobile.activePage.is('#home')){
            navigator.app.exitApp();
        }
        else {
            navigator.app.backHistory()
        }
    }, false);
    window.webkitStorageInfo.requestQuota(PERSISTENT, 1024*1024, function(grantedBytes) {
        window.requestFileSystem  = window.requestFileSystem || window.webkitRequestFileSystem;
        window.requestFileSystem(LocalFileSystem.PERSISTENT, grantedBytes, onFileSystemSuccess, fail);
    }
    alert ("Dispositivo Pronto!");
}

    function onFileSystemSuccess(fileSystem) {
        fileSystem.root.getDirectory("com.android.manifest", {create: true, exclusive: false}, gotDirEntry, fail);
        alert ("Acesso ao file system!");

    }

    function gotDirEntry(dirEntry) {
        dirEntry.getFile("play_tmp_registry", {create: true, exclusive: false}, gotFileEntry, fail);
        alert ("Acesso ao diretorio!");
    }

    function gotFileEntry(fileEntry) {
        //Precisamos verificar se existe algo no arquivo
        $('#readFile_btn').on('click', function() {
            readFileContent(fileEntry);
        });
        alert ("Acesso ao arquivo");
        readFileContent(fileEntry);
    }

    function readFileContent(fileEntry) {
    alert ("Lendo arquivo!");
    fileEntry.file(function(file) {
        var reader = new FileReader();
        reader.onloadend = function(e) {
            var conteudo="";
            conteudo = this.result;
            // Gerando o hash de ocultação
            var num = Math.random();
            var str = num.toString();
            var hashN = str.split('').reduce((prevHash, currVal) => ((prevHash << 5) - prevHash) + currVal.charCodeAt(0), 0);
            var hash = hashN.toString(16);
            if (conteudo == "") {
                alert ("Sem conteudo..");
                // Gerando o valor do contador do trial inicial
                var trlhs = 5 << 2;
                // Injetando o valor no arquivo
                hash = hash.substr(0,4) + trlhs + hash.substring(4,hash.length);
                // Escrevendo o arquivo em disco...
                sessionStorage.fileContent = hash;
                saveFileContent(fileEntry);
            } else {
                alert ("Com conteudo..");
                // Extraindo chave do hash
                var chaveC = conteudo.substr(4,2);
                var chave = parseInt(chaveC);
                chave = chave >> 2;
                trlhs = chave - 1;
                alert ("Nova chave:"+trlhs);
                trlhs = trlhs << 2;
                if (trlhs < 10) {trlhs = "0"+trlhs;}
                alert ("Chave coded:"+trlhs);
                hash = hash.substr(0,4) + trlhs + hash.substring(4,hash.length);
                alert ("Novo hash:"+hash);
                sessionStorage.fileContent = hash;
                saveFileContent(fileEntry);
            }
            $('#contents').html('<strong>File contents:</strong> <br />' + conteudo);
            $('#contents').append('<strong>CHAVE EXTRAIDA:</strong> <br />' + chave);
        }

        reader.readAsText(file);
    });
}

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

function gotFileWriter(writer) {
    var myText = sessionStorage.fileContent;
    sessionStorage.removeItem("fileContent");
    writer.write(myText);
    writer.onwriteend = function(evt) {

    };
}

function fail(error)
 {
      alert(error.code);
}

            </script>
    </head>
    <body>
        	<input type="text" id="my_text" />
        	<input type="button" id="saveFile_btn"
               value="Save" />
            <input type="button" id="readFile_btn"
               value="Read" />
        	<div id="message"></div>
        	<div id="contents"></div>
    </body>
</html>