(AutoIt) Call a JavaScript Function Returning an Integer

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Note: This example requires Chilkat v11.4.0 or greater.

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Local $bSuccess = False

; ----------------------------------------------------------------------------------
; The Javascript function called in this example is shown at the bottom of this page.
; -----------------------------------------------------------------------------------

; In this example, we'll load the Javascript function definition from a file.
; It doesn't need to come from a file.  It could just as easily be loaded from a string.
$oSbScript = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oSbScript.LoadFile("js_call_function.js","utf-8")
If ($bSuccess = False) Then
    ConsoleWrite($oSbScript.LastErrorText & @CRLF)
    Exit
EndIf

; Note: Each instance of a Chilkat Js object automatically establishes
; its own internal runtime and context.  Applications do not need to explicitly create
; the JavaScript runtime or context.
$oJs = ObjCreate("Chilkat.Js")

$oResult = ObjCreate("Chilkat.JsonObject")
$oResult.EmitCompact = False

; Call Eval to add the function (shown at the bottom of this page) to the context's global object
$bSuccess = $oJs.Eval($oSbScript,$oResult)
If ($bSuccess = False) Then
    ; Examine the result for an exception.
    ConsoleWrite($oResult.Emit() & @CRLF)

    ; Also examine the LastErrorText.
    ConsoleWrite($oJs.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($oResult.Emit() & @CRLF)

; The expected output is "undefined":

; {
;   "type": "undefined",
;   "value": "undefined"
; }

;    When Eval processes a script containing only a function declaration,
;    it successfully performs the action (the function becomes defined).
;    However, since the script consists of a statement that produces no value,
;    the script's overall completion value is empty. In JavaScript, the
;    absence of a value is represented by `undefined`.
; 
;    Therefore, the Eval call returns `undefined`.

; ------------------------------------------------------------------------------
; Call the function calculateScore("Player1", 10, 20)

$oFuncCall = ObjCreate("Chilkat.JsonObject")

; Create JSON defining the function call:

; {
;   "name": "calculateScore",
;   "args": [ "Player1", 10, 20 ]
; }

$oFuncCall.UpdateString("name","calculateScore")
$oFuncCall.UpdateString("args[0]","Player1")
$oFuncCall.UpdateInt("args[1]",10)
$oFuncCall.UpdateInt("args[2]",20)

$oFuncCall.EmitCompact = False
ConsoleWrite($oFuncCall.Emit() & @CRLF)

$bSuccess = $oJs.CallFunction($oFuncCall,$oResult)
If ($bSuccess = False) Then
    ; Examine the result for an exception.
    ConsoleWrite($oResult.Emit() & @CRLF)

    ; Also examine the LastErrorText.
    ConsoleWrite($oJs.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite($oResult.Emit() & @CRLF)

; Output:

; {
;   "type": "int",
;   "value": 37
; }

Local $iRetval = $oResult.IntOf("value")
ConsoleWrite("retval = " & $iRetval & @CRLF)

function calculateScore(name, pointsA, pointsB) {
    // Return length of name + both scores
    return name.length + pointsA + pointsB;
    }