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Xbasic and Javascript

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  • Xbasic and Javascript

    I'm trying to embed a Javascript function into my xbasic, while still maintaining the xbasic functions. I have this defined in Xbasic for persistent login:

    function xbLogin as c (e as p)
    'this is the Xbasic function that handles login. When the user clicks the 'login' button
    'this function is called. If the user has supplied valid credentials and can be logged into the
    'Alpha Anywhere security framework, a JWT is created and sent back to the client where it is stored in
    'The JWT is sent back to the server on all subsequent Ajax callbacks. If the user's session has expired
    'and the user is therefore no longer logged in, the JWT is decoded and the user is automatically logged
    'in to the Alpha Anywhere security framework using the username/password in the decoded JWT.

    dim jsOut as c
    dim logMessages as c = ""
    dim username as c
    dim password as c
    username = e.datasubmitted.username
    password = e.datasubmitted.password
    'try to login programmatically using
    dim pResult as p
    pResult = a5ws_Login_User(userName,password)
    if pResult.error then
    'if login fails, display an error message in the 'LOGIN_ERRORS' placeholder.
    logMessages = "console.log('Login FAILED.');" + crlf()
    dim js as c
    dim message as c = "Login failed."
    if e.tmpl.embeddedMode = .t. then
    message = message + crlf() + "Login not supported in Working Preview mode."
    message = pResult.error_text
    end if
    message = stritran(message,crlf(),"<br>")
    message = "<span style="color:red;">" + message + "</span>"

    js = "var ele = {dialog.object}.getPointer('LOGIN_ERRORS'); ele.innerHTML = '"+js_escape(message)+"';"
    jsOut = logMessages + js + "alert('Login failed. Please login again.'); {dialog.object}.panelSetActive('PANEL_LOGIN');"

    xbLogin = jsOUt
    exit function
    end if

    'If you get here, login has succeeded.

    'generate a JWT
    dim options.algorithm as c = "HS512" 'specify the encryption algorithm for the JWT. See for info
    dim options.expiresin as n = 60000 'token is set to expire after 1,000 minutes
    dim optionsjson as c = json_generate(options)
    delete obj
    dim obj as p
    obj.userName = userName
    obj.password = password
    dim json as c
    json = json_generate(obj)
    dim token as c = extension::JSON::JWTSign(json,"shhhh!",optionsjson)

    'Create the Javascript response to send to the client. The Javascript must:
    'set focus to the application Panel (PANEL_APPLICATION)
    'stores the JWT in localStorage
    'store the JWT in the UX state object so that the JWT is submitted to the server on every Ajax callback
    'NOTE: e._state.token gets translated into Javascript to set the token value in the UX state object.

    logMessages = "console.log('New token:"+js_escape(token)+" generated for user: "+js_escape(userName)+"');" + crlf()
    jsOut= logMessages + "{dialog.object}.panelSetActive('PANEL_APPLICATION');"

    jsOut = jsOut + "localStorage.setItem('" + e.tmpl.guid + "','" + js_escape(token) + "');"
    jsOut = jsOUt + "var ele = {dialog.object}.getPointer('LOGIN_ERRORS'); ele.innerHTML = '';"
    xbLogin = jsOut
    e._state.token = token

    end function


    I've created a separate javascript function as follows:

    function control() {
    var cbObj = {dialog.object}.getControl('CONTROLBAR_1');
    if(cbObj) cbObj.setLayout('Layout2');

    This javascript is to change the control bar to a different layout once login is complete. What I am trying to do is figure out how to embed this into the xbasic.

    If at the end of my xbasic function, I set xblogin = control(), that triggers my javascript to change the control bar layout, but it ignores everything else in the xblogin function. How do I rewrite the xblogin function so that it does the login and the javascript together?

    I have also tried adding this to my xblogin function:

    dim control as c
    control = control()

    But that doesn't seem to fire the javaqscript. I'm sure this is easy to someone out there, I am just a newb when it comes to xbasic. Also, is there any xbasic training anywhere? I would love to study up on it.


  • #2
    Re: Xbasic and Javascript

    Javascript returning from Xbasic is just a string of code. What you're doing is setting xblogin to your Javascript code and then re-assigning xblogin to "control()".

    Just add another line appending "control();" to your existing xblogin... e.g.

    xblogin = xblogin + "control();"
    This process is already demonstrated in the code you're using... see the jsOut stuff.
    Also, dimming "control" will do nothing for you... and setting control = control() or xblogin = control() will probably create an error. You're simply passing back the name of a Javascript function (along with everything else)... so you must pass back a string.


    • #3
      Re: Xbasic and Javascript

      Ah, makes sense. Thanks so much!