guid.js

// � by Caspar Goeke and Holger Finger

/**
 * generated a global unique id.
 *
 * @returns {string}
 */
function guid() {
    function s4() {
        return Math.floor((1 + Math.random()) * 0x10000)
            .toString(16)
            .substring(1);
    }
    return s4() + s4() + '' + s4() + '' + s4() + '' +
        s4() + '' + s4() + s4() + s4();
}


function getCurrentDate(offset) {
    var today = new Date();
    var dd = today.getDate();
    var mm = today.getMonth() + 1; //January is 0!
    var yyyy = today.getFullYear();
    if (offset) {
        var hh = today.getHours() + offset;
    }
    else {
        var hh = today.getHours();
    }
    if (hh < 0) {
        dd--;
        hh = 24 - hh;
    }
    else if (hh > 23) {
        dd++;
        hh = hh - 24
    }

    if (dd < 10) {
        dd = '0' + dd;
    }
    if (mm < 10) {
        mm = '0' + mm;
    }
    var today = yyyy + '/' + mm + '/' + dd;
    return today
};


function getCurrentDateModified(offset) {
    var today = new Date();
    var dd = today.getDate();
    var mm = today.getMonth() + 1; //January is 0!
    var yyyy = today.getFullYear();
    var hh = today.getHours() + offset;
    if (hh < 0) {
        dd--;
        hh = 24 - hh;
    }
    else if (hh > 23) {
        dd++;
        hh = hh - 24
    }
    var min = today.getMinutes();

    if (dd < 10) {
        dd = '0' + dd;
    }
    if (mm < 10) {
        mm = '0' + mm;
    }
    var date = yyyy + "-" + mm + "-" + dd;
    var time = hh + ":" + min;

    var obj = {
        date: date,
        time: time,
        data: [yyyy, parseInt(mm), parseInt(dd), hh, min]
    };
    return obj;

}


function copyTarget(elemId) {
    var elem = $('#' + elemId)[0];
    // create hidden text element, if it doesn't already exist
    var targetId = "_hiddenCopyText_";
    var isInput = elem.tagName === "INPUT" || elem.tagName === "TEXTAREA";
    var origSelectionStart, origSelectionEnd;
    if (isInput) {
        // can just use the original source element for the selection and copy
        target = elem;
        origSelectionStart = elem.selectionStart;
        origSelectionEnd = elem.selectionEnd;
    } else {
        // must use a temporary form element for the selection and copy
        target = document.getElementById(targetId);
        if (!target) {
            var target = document.createElement("textarea");
            target.style.position = "absolute";
            target.style.left = "-9999px";
            target.style.top = "0";
            target.id = targetId;
            document.body.appendChild(target);
        }
        target.textContent = elem.textContent;
    }
    // select the content
    var currentFocus = document.activeElement;
    target.focus();
    target.setSelectionRange(0, target.value.length);

    // copy the selection
    var succeed;
    try {
        succeed = document.execCommand("copy");
    } catch (e) {
        succeed = false;
    }
    // restore original focus
    if (currentFocus && typeof currentFocus.focus === "function") {
        currentFocus.focus();
    }

    if (isInput) {
        // restore prior selection
        elem.setSelectionRange(origSelectionStart, origSelectionEnd);
    } else {
        // clear temporary content
        target.textContent = "";
    }
    return succeed;
}

function getBlobURL(url, fallbackMimetype, callback) {
    var xhr = new XMLHttpRequest();
    xhr.open("get", url);
    xhr.responseType = "arraybuffer";
    var ext = url.substr(url.lastIndexOf('.') + 1);

    xhr.addEventListener("load", function () {

        var arrayBufferView = new Uint8Array(this.response);

        var mime = xhr.getResponseHeader("Content-Type");
        if (!mime) {
            mime = fallbackMimetype;
        }

        var blob = new Blob([arrayBufferView], { type: mime });
        var url = null;

        if (window.URL) {
            url = window.URL.createObjectURL(blob);
        } else if (window.URL && window.URL.createObjectURL) {
            url = window.URL.createObjectURL(blob);
        }
        callback(url, blob);
    });
    xhr.send();
}