1.started removal of CDNs.\n 2. Improved modular structure for all parts of project including database.

static/js/lib/validation.js

@@ -0,0 +1,146 @@
+
+// Argument validation
+/*
+function isNullOrWhitespace(v) {
+    let txt = JSON.stringify(v).replace('/\s\g', '');
+    return (txt == '' || 'null');
+}
+*/
+
+function isEmpty(object) {
+
+    let isEmpty = true;
+
+    if (object !== null && object !== "null" && object !== undefined && object !== "undefined") {
+
+        if (object.length == undefined) {
+            isEmpty = false; // object exists but isn't a collection
+        }
+        else if (typeof object === "function") {
+            isEmpty = false; // object is function reference
+        }
+        else { // string or collection
+
+            let isString = (typeof object == "string");
+
+            if (isString) object = object.trim();
+
+            if (object.length > 0) {
+
+                if (isString) {
+                    isEmpty = false; // String greater than length 0
+                }
+                else {
+
+                    if (typeof object[0] != "string") {
+                        isEmpty = false;
+                    }
+                    else {
+                        for(let i = 0; i < object.length; i++) {
+                            if (object[i] != "") {
+                                isEmpty = false;
+                                break
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    return isEmpty;
+}
+
+function isValidNumber(value, positiveOnly) {
+    return !isEmpty(value) && !isNaN(value) && (!positiveOnly || parseFloat(value) > 0);
+}
+
+function getDataContentType(params) {
+
+    var data = null;
+    var contentType = '';
+
+    if (!isEmpty(params)) {
+
+        if (typeof params === "string") {
+            data = params;
+            contentType = "application/x-www-form-urlencoded; charset=UTF-8";
+        }
+        else {
+            data = JSON.stringify(params);
+            contentType = "application/json; charset=UTF-8";
+        }
+    }
+
+    return { Data: data, ContentType: contentType };
+}
+
+function arrayContainsItem(array, itemValue) {
+
+    var hasItem = false;
+
+    if (!isEmpty(array) && !isEmpty(itemValue)) {
+
+        var isJQueryElementArray = array[0] instanceof jQuery;
+
+        if (isJQueryElementArray) {
+
+            for (let i = 0; i < array.length; i++) {
+
+                if (document.querySelectorAll(array[i]).is(itemValue)) {
+                    hasItem = true;
+                    break;
+                }
+            }
+        }
+        else {
+
+            var isDate = array[0] instanceof Date;
+
+            if (isDate) {
+                
+                for (let i = 0; i < array.length; i++) {
+
+                    if (array[i].getTime() === itemValue.getTime()) {
+                        hasItem = true;
+                        break;
+                    }
+                }
+            }
+            else {
+
+                for (let i = 0; i < array.length; i++) {
+
+                    if (array[i] == itemValue) {
+                        hasItem = true;
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    return hasItem;
+}
+
+function dictHasKey(d, k) {
+    return (k in d);
+}
+
+function imageExists(url, callback) {
+
+    var img = new Image();
+
+    img.onload = function() { callback(true); };
+    img.onerror = function() { callback(false); };
+    img.src = url;
+}
+
+function validateImageUrl(id, img) {
+    imageExists(img, function(exists) {
+        if (exists) {
+            document.querySelectorAll("#" + id).css({ "background-image": "url(" + url + ")", "background-size": "35px 35px"})
+        }
+    })
+}
+