Javascript upload file size - javascript

I need help with file size on upload. i'd like to add file maximum size 2MB.
I use javascript code and i'm not good with javascript so if you guys can add file size into my code. Thanks.
var _validFileExtensions = [".jpg", ".jpeg", ".png"];
function Validate(oForm) {
var arrInputs = oForm.getElementsByTagName("input");
for (var i = 0; i < arrInputs.length; i++) {
var oInput = arrInputs[i];
if (oInput.type == "file") {
var sFileName = oInput.value;
if (sFileName.length > 0) {
var blnValid = false;
for (var j = 0; j < _validFileExtensions.length; j++) {
var sCurExtension = _validFileExtensions[j];
if (sFileName.substr(sFileName.length - sCurExtension.length, sCurExtension.length).toLowerCase() == sCurExtension.toLowerCase()) {
blnValid = true;
break;
}
}
if (!blnValid) {
alert("Sorry, " + sFileName + " is invalid, allowed extensions are: " + _validFileExtensions.join(", "));
return false;
}
}
}
}
return true;
}

This is the code I ended up writing
It can still be optimized in various ways, so its open for any performance, semantic or refactoring edits. I am not an expert.
Code Explained
In var _maxFilsize you have to write size of max file size to be allowed in bytes.
Function Validate has parameter oForm which expects an HTML object, through which it can search for input fields.
Store all input elements in an array, arrInputs.
Store value of arrInputs[i].type in string form in variable inputType
Compare the value of inputType with different input types in if/else statements.
When condition is met, each block returns a function that validates the matched input field
Function validateImage takes an argument which is simply the input field's property that contains list of files selected by user, arrInputs[i].files.
In validateImage Function there is a for loop that iterates over the list of files and validates their type and size, and returns true or false depending upon validity of file.
Code
var _maxFilesize = 2000000;// in bytes
function Validate(oForm) {
var arrInputs = oForm.getElementsByTagName("input");
var inputType;
var i = 0;
var arrLength = arrInputs.length;
for (i; i < arrLength; i++) {
inputType =arrInputs[i].type.toString();
if (inputType === "file"){
return validateImage(arrInputs[i].files);//calls function for validating image
}else if(inputType === "email"){
//call email validating function
}//add validation for more fields
}
}
function validateImage(file){
var j = 0;
var NumberOfFiles = file.length;
for(j; j< NumberOfFiles;j++){
if ((file[j].type === "image/jpeg" || file[j].type === "image/png")&& (file[j].size)<= _maxFilesize){
return true //or whatever you want to do here like calling a function to upadate view, or something
}
else{
return false //or whatever you want to do here like calling a function to upadate view, or something
}
}
}

Related

How to underline charachters in InDesign with JavaScript?

I started writing this piece of code for InDesign to underline all letters except from the one with descendants, and added a dialog window to chose stroke and offset of the line.
Now I have two problems:
the program underlines all letters
the stroke and offset won't change
I'm a beginner in Javascript and it's the first time coding for InDesign. Does someone have a clue? Thank you!
// UNDERLINE ALL BUT NO DESCENDANTS
//Make certain that user interaction (display of dialogs, etc.) is turned on.
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.interactWithAll;
if (app.documents.length != 0){
try {
// Run script with single undo if supported
if (parseFloat(app.version) < 6) {
main();
} else {
app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Expand State Abbreviations");
}
// Global error reporting
} catch ( error ) {
alert( error + " (Line " + error.line + " in file " + error.fileName + ")");
}
}else{
alert("Open a document first before running this script.");
}
///MAIN FUNCTION
function main(){
if(app.selection.length != 0){
myDisplayDialog();
}
}
//INTERFACE
function myDisplayDialog(){
//declare variables
//general
var myDoc = app.activeDocument;
var mS = myDoc.selection;
// dialog
var myDialog = app.dialogs.add({name:"Underliner"});
var myLabelWidth = 70;
with(myDialog.dialogColumns.add()){
with(borderPanels.add()){
with(dialogColumns.add()){
with(dialogRows.add()){
staticTexts.add({staticLabel:"Stroke:", minWidth:myLabelWidth});
staticTexts.add({staticLabel:"Offset:", minWidth:myLabelWidth});
}
}
with(dialogRows.add()){
staticTexts.add({staticLabel:""});
var myStroke = measurementEditboxes.add({editValue:1, editUnits:MeasurementUnits.points});
var myOffset = measurementEditboxes.add({editValue: 15, editUnits:MeasurementUnits.points});
}
}
}
var myResult = myDialog.show();
if(myResult == true){
var myStroke = myStroke.editValue;
var myOffset = myOffset.editValue;
myDialog.destroy();
underline(mS,myStroke,myOffset);
}
else{
myDialog.destroy();
alert("Invalid page range.");
}
}
//REAL FUNCTION
function underline(charList,stroke, offset){
var len = charList.length;
const doNotUnderline = ['g','j','p','q','y'];
for (var i=0; i < len; i++){
try{
var myChar = charList[i];
//console.log(typeof myText);
if (includes(myChar, doNotUnderline) == false)
{
myChar.underline = true;
myChar.underlineWeight == stroke;
myChar.underlineOffset == offset;
} else {
myChar.underline = false;
}
}catch(r){
alert(r.description);
break;
}
}
}
//function to know if char is in array
function includes(elemento,array)
{
var len = array.length;
for(var i=0; i<len ;i++)
{
if(array[i]==elemento){return true;}
}
return false;
}
Try these changes in the function underline():
//REAL FUNCTION
function underline(words,stroke, offset) { // <------ here 'words' instead of 'charList'
var charList = words[0].characters; // <------ here get 'characters' of the 'words'
var len = charList.length;
const doNotUnderline = ['g','j','p','q','y'].join(); // <------- here '.join()'
for (var i=0; i < len; i++){
try{
var myChar = charList[i];
// if (includes(myChar, doNotUnderline) == false) // <----- no need
if (doNotUnderline.indexOf(myChar.contents) < 0) // <------ 'indexOf()' instead of 'includes()'
{
myChar.underline = true;
myChar.underlineWeight = stroke; // <------- here '=' instead of '=='
myChar.underlineOffset = offset; // <------- here '=' instead of '=='
} else {
myChar.underline = false;
}
}catch(r){
alert(r.description);
break;
}
}
}
Probably there can be another improvements as well. It's need additional researches. But if you change these lines it should work to a degree.
And there is one little thing that improves user experience greatly: to keep last used values in the input fields. It can be done pretty easy, let me know it you need it.
Update
Here is the way I'm using to store and restore any preferences of my scripts.
Add somewhere at the start of your script these lines:
// get preferences
var PREFS = { stroke: 1, offset: 15 }; // set default prefs
var PREFS_FILE = File(Folder.temp + '/underline_prefs.json'); // the file with preferences
if (PREFS_FILE.exists) PREFS = $.evalFile(PREFS_FILE); // get the prefs from the file
Now you can use the global values PREFS.stroke and PREFS.offset anywhere you want. In your case they go here:
with(dialogRows.add()){
staticTexts.add({staticLabel:""});
var myStroke = measurementEditboxes.add({editValue:PREFS.stroke, editUnits:MeasurementUnits.points});
var myOffset = measurementEditboxes.add({editValue:PREFS.offset, editUnits:MeasurementUnits.points});
}
This way script will get the stroke and weight from the file underline_prefs.json that will be stored in the standard temporary folder of current user.
Final step is to save the values back into the file after the script got them from the dialog window.
I'd put this piece of code here:
if (myResult == true) {
var myStroke = myStroke.editValue;
var myOffset = myOffset.editValue;
myDialog.destroy();
underline(mS, myStroke, myOffset);
// save preferences here
PREFS.stroke = myStroke;
PREFS.offset = myOffset;
PREFS_FILE.open('w');
PREFS_FILE.write(PREFS.toSource());
PREFS_FILE.close();
} else {
myDialog.destroy();
alert("Invalid page range.");
}
Voilá. Now don't need to type the values every time they differ from default ones.

pdfjs: Fill out a form and get the fieldValues

I'm using pdfjs to display a PDF form (acroforms example). If I fill in some fields, how do I get those annotations.
I've tried:
pdfPage.getAnnotations().then(function(a) {
for(var i = 0;i < a.length; i++) {
console.log(a[i].id + ' - ' + a[i].fieldValue);
}
});
But all I get are empty fieldValues. I guess I'm getting them from the original PDF. How do I access the live document which includes the new annotations?
async getAnnotations() {
var result = {};
var pages = PDFViewerApplication.pdfDocument.numPages;
for (var i = 1; i <= pages; i++) {
var page = await PDFViewerApplication.pdfDocument.getPage(i);
var annotations = await page.getAnnotations();
for (var j = 0; j < annotations.length; j++) {
var element = annotations[j];
// Field Name
if (result[element.fieldName] == null) {
result[element.fieldName] = null;
}
var val = PDFViewerApplication.pdfDocument.annotationStorage.getOrCreateValue(element.id);
if (element.radioButton) {
if (val.value) {
result[element.fieldName] = element.buttonValue;
}
} else if (element.checkBox) {
result[element.fieldName] = val.value ? "On" : "Off";
} else {
result[element.fieldName] = val.value;
}
}
};
return result;
}
You should save values written by user in a local variable
Then you should create a xfdf file ( xml file by Adobe ) , look for Example nere : https://developer.salesforce.com/page/Adobe_XFDF . The xfdf should then be merged with original pdf to produce a new compiled pdf

JavaScript Check multiple variables being empty

I'm trying the following code:
var var1 = "";
var var2 = "test";
var var3 = "";
vars = new Array('var1','var2','var3');
var count = 0;
for (var i = 0; i < vars.length; ++i) {
var name = vars[i];
if (field_is_empty(name)) {
count++;
}
}
console.log(count);
function field_is_empty(sValue) {
if (sValue == "" || sValue == null || sValue == "undefined")
{
return true;
}
return false;
}
The result here should have been count = 2 because two of the variables are empty but it's always 0. I guess it must something when using if (field_is_empty(name)) because it might not getting the name converted to the name of the actual var.
PROBLEM 2# Still related
I've updated the code as Karthik Ganesan mentioned and it works perfectly.
Now the code is:
var var1 = "";
var var2 = "test";
var var3 = "";
vars = new Array(var1,var2,var3);
var count = 0;
for (var i = 0; i < vars.length; ++i) {
var name = vars[i];
if (field_is_empty(name)) {
count++;
}
}
console.log(count);
function field_is_empty(sValue) {
if (sValue == "" || sValue == null || sValue == "undefined")
{
return true;
}
return false;
}
And the problem is that if add a new if statement something like this:
if (count == '3') {
console.log('AllAreEmpty');
} else {
for (var i = 0; i < vars.length; ++i) {
var name = vars[i];
if (field_is_empty(name)) {
//Set the empty variables as "1900-01-01"
variableService.setValue(name,"test");
}
}
}
It does nothing and I've tested using variableService.setValue('var1',"test") and it works.
PS: The variableService.setValue is a function controlled by the software I don't know exactly what it does I know if use it like mentioned on above line it works.
In your first attempt you used the variable names as strings when you created an array. You need to either use the values themselves:
vars = new Array(var1,var2,var3);
or if you insist to use them by their names, then you need to find them by names when you use them:
if (field_is_empty(window[name])) {
It does nothing
That's not really possible. It could throw an error, or enter the if or enter the else, but doing nothing is impossible. However, since you intended to use the variables by name in the first place (probably not without a reason) and then you intend to pass a name, but it is a value and it does not work as expected, I assume that your initial array initialization was correct and the if should be fixed like this:
var var1 = "";
var var2 = "test";
var var3 = "";
vars = new Array(var1,var2,var3);
var count = 0;
for (var i = 0; i < vars.length; ++i) {
var v = window[vars[i]]; //You need the value here
if (field_is_empty(v)) {
count++;
}
}
console.log(count);
if (count == '3') {
console.log('AllAreEmpty');
} else {
for (var i = 0; i < vars.length; ++i) {
var v = window[vars[i]];
if (field_is_empty(v)) {
//Set the empty variables as "1900-01-01"
variableService.setValue(vars[i],"test");
}
}
}
function field_is_empty(sValue) {
if (sValue == "" || sValue == null || sValue == "undefined")
{
return true;
}
return false;
}
You definitely incorrectly initialize array, you put strings "var1", "var2", "var3" instead of references to strings (variables).
Try this:
vars = new Array(var1,var2,var3);
Your array is wrong
it should be
vars = new Array(var1,var2,var3);
here is the jsfiddle

How to display the string content of this array all at once using javascript?

I am using this for form validation. I call this function when there is an error and i send it a string as a parameter.
var errList = new Array();
function aerrorList(error){
errList.push(error);
for (var i=0; i < errList.length; i++){
alert(errList[i]);
}
}
here is one of the validation checks:
function lNameValidate() {
var lName = document.getElementById("lastname");
if (lName.value.length < 20 && /^[a-zA-Z0-9- ]*$/.test(lName.value)){
stNumValidate();
} else {
lName.style.border = "red";
errorList("Invalid lName Format");
stNumValidate();
}
}
The current array (using alert) displays the error in a number of popup boxes with only 1 error string each. i want it to display 1 alert which would show all the errors in a list similar to outputting it in a bullet point way.
You can append all the errors to one var and then display it:
function aerrorList(error){
errList.push(error);
var errors = "";
for (var i=0; i < errList.length; i++){
errors += errList[i] + "\n";
}
alert(errors);
}
You could use join method on an array, Here's an example:
errors=['error1','error2','error3']
Here, a is an array of list of your errors, now you can glue them together using whatever you want like this:
error_string=error.join("\n*")
Finally you can make an alert:
alert(error_string)
Try this:
var Errors = {
messages: [],
push: function(message) {
this.messages.push(message);
},
alert: function() {
alert(this.messages.join("\n"));
},
showInElement: function(element) {
element.innerHTML = this.messages.join('<br/>');
},
clear: function() {
this.messages = [];
}
}
var age = 1;
if(age < 18) {
Errors.push("Come back when You 18+");
}
var name = "Jack";
if(name != "John") {
Errors.push("You're not John!");
}
Errors.alert();
var element = document.getElementById('content');
Errors.showInElement(element);
Errors.clear();
<div id="content"></div>
So I ended up using this:
var errList = new Array();
function errorList(error){
errList.push(error);
}
function showErrors() {
alert(errList.join("\n"));
}
where i just call showErrors on the very last validation check if the errList length is > 1 as such:
function emailRestrict() {
var eVal = document.getElementById("email").value;
var atPos = eVal.indexOf("#");
var dotPos = eVal.lastIndexOf(".");
if (atPos < 1 || dotPos < atPos || dotPos >= eVal.length) {
errorList("not valid email");
if (errList.length > 1){
showErrors();
}
return false;
}
else {
if (errList.length > 1){
showErrors();
}
return true;
}
}

Retrieving rich text box sharepoint in javascript

I have CustomNewForm for inserting items in the sharepoint list.
The fields are "Reason" and "Reason OverView"; both Multiple Line Rich Text fields. I need to copy some text from "Reason" to "Reason Overview".(A substring)
I tried to get this done with workflow but couldn't find a solution to get a substring of a form field.
I am trying to get the value from "Reason" field in javascript; but unable to do so.
MY CODE :: (not working)
<script type="text/javascript">
function PreSaveAction()
{
var Reason = getTagFromIdentifierAndTitle("textarea","TextField","Reason");
var Original = getTagFromIdentifierAndTitle("textarea","TextField","Reason Overview");
alert('Hi');
Original.innerHTML=Reason.innerHTML;
return true;
}
function getTagFromIdentifierAndTitle(tagName, identifier, title)
{
var len = identifier.length;
var tags = document.getElementsByTagName(tagName);
for (var i=0; i < tags.length; i++)
{
var tempString = tags[i].id;
if (tags[i].title == title && (identifier == "" || tempString.indexOf(identifier) == tempString.length - len))
{
return tags[i];
}
}
return null;
}
</script>
Any way to get this done??
I solved it using this
<script type="text/javascript">
function PreSaveAction()
{
var Reason = getTagFromIdentifierAndTitle("textarea","TextField","Reason");
var Original = getTagFromIdentifierAndTitle("textarea","TextField","Reason Overview");
var reasonText = RTE_GetEditorDocument(Reason.id);
var reasonOverviewText = reasonText.body.innerText;
if(reasonOverviewText.length>=20)
{
reasonOverviewText = reasonOverviewText.substring(0,20)+'......';
Original.innerText = reasonOverviewText;
}
else
{
Original.innerText = reasonOverviewText;
}
return true;
}
function getTagFromIdentifierAndTitle(tagName, identifier, title)
{
var len = identifier.length;
var tags = document.getElementsByTagName(tagName);
for (var i=0; i < tags.length; i++)
{
var tempString = tags[i].id;
if (tags[i].title == title && (identifier == "" || tempString.indexOf(identifier) == tempString.length - len))
{
return tags[i];
}
}
return null;
}
</script>

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