Thanks to Your Answer @Sandy Good from you suggestion/idea I able to create a simple script and after creating this script I am sure I will be able to create a complicated script also.
I have created a script that will create a form in in google site's page. this form contain a dropdown list of my google drive files and an input filed in which i will add an email address.
and in the last a submit button.
after pressing submit button , the script work as it will grant permission on a selected to the email given as viewer of the file if he has link.
create a blank script in the Google Site's Apps Script Section.
Add some UI via UI Service
function doGet() {
// create ui element
var app = UiApp.createApplication();
// create form
var form = app.createFormPanel();
// create area or panel
var flow = app.createFlowPanel();
// create list box for files
var element_file = app.createListBox().setId('file_name').setName('file_name');
// add first elemnt
element_file.addItem('Please Select','');
// get drive files
var files = DriveApp.getFiles();
while (files.hasNext()) {
var file = files.next();
element_file.addItem(file.getName(),file.getId());
}
flow.add(element_file);
var element_text=app.createTextBox().setId('email').setName('email');
flow.add(element_text);
flow.add(app.createSubmitButton("Submit"));
form.add(flow);
app.add(form);
return app;
}
after this I handle the data submitted via post
function doPost(e) {
var app = UiApp.getActiveApplication();
var email = e.parameter.email;
var file_name = e.parameter.file_name;
var public_file = DriveApp.getFileById(file_name);
public_file.addViewer(email);
return app;
}
after this you can check the permissions of the specific file in the google drive.
you may also add a success message.
after this go to publish menu of the file select deploy as web app then select the required things. remember please select execute scripts only as me option because you are listing all your files.
then go to the page in which you want to add script just edit/add new page from editor of the page just insert Apps Script.
apologies , its my first time to work in google apps script , if I miss anything or i did not follow any rule etc.
Thanks,
