Swift

Call a JavaScript Function Returning an Array

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Demonstrates how to call a JavaScript function that returns an array. Swift

func chilkatTest() {
    var success: Bool = false

    // ----------------------------------------------------------------------------------
    // The Javascript functions called in this example are shown at the bottom of this page.
    // -----------------------------------------------------------------------------------

    let sbScript = CkoStringBuilder()!
    success = sbScript.loadFile(path: "js_function_returning_array.js", charset: "utf-8")
    if success == false {
        print("\(sbScript.lastErrorText!)")
        return
    }

    let js = CkoJs()!

    let result = CkoJsonObject()!
    result.emitCompact = false

    // Call Eval to add the function to the context's global object
    success = js.eval(jscript: sbScript, result: result)
    if success == false {
        // Examine the result for an exception.
        print("\(result.emit()!)")

        // Also examine the LastErrorText.
        print("\(js.lastErrorText!)")
        return
    }

    // ------------------------------------------------------------------------------
    // Call each function

    let funcCall = CkoJsonObject()!

    // Create JSON specifying the function name and arguments
    // The function has no arguments, so we only specify the name.

    funcCall.updateString(jsonPath: "name", value: "getDays")

    success = js.callFunction(func: funcCall, result: result)
    if success == false {
        // Examine the result for an exception.
        print("\(result.emit()!)")

        // Also examine the LastErrorText.
        print("\(js.lastErrorText!)")
        return
    }

    print("\(result.emit()!)")

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     "Monday",
    //     "Tuesday",
    //     "Wednesday",
    //     "Thursday",
    //     "Friday"
    //   ]
    // }

    // Access each array value..
    var count: Int = result.size(ofArray: "value").intValue
    var i: Int = 0
    while i < count {
        result.i = i
        print("\(result.string(of: "value[i]")!)")
        i = i + 1
    }

    // ------------------------------------------------------------------------------
    // Call the getRange(start,end) function

    funcCall.clear()
    funcCall.updateString(jsonPath: "name", value: "getRange")
    funcCall.updateInt(jsonPath: "args[0]", value: 14)
    funcCall.updateInt(jsonPath: "args[1]", value: 21)
    success = js.callFunction(func: funcCall, result: result)
    print("\(result.emit()!)")

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     14,
    //     15,
    //     16,
    //     17,
    //     18,
    //     19,
    //     20,
    //     21
    //   ]
    // }

    count = result.size(ofArray: "value").intValue
    i = 0
    while i < count {
        result.i = i
        print("\(result.int(of: "value[i]").intValue)")
        i = i + 1
    }

    // ------------------------------------------------------------------------------
    // Call the getEmployees() function

    funcCall.clear()
    funcCall.updateString(jsonPath: "name", value: "getEmployees")
    success = js.callFunction(func: funcCall, result: result)
    print("\(result.emit()!)")

    // Output:
    // {
    //   "type": "array",
    //   "value": [
    //     {
    //       "id": 101,
    //       "name": "Alice",
    //       "role": "Dev"
    //     },
    //     {
    //       "id": 102,
    //       "name": "Bob",
    //       "role": "Manager"
    //     }
    //   ]
    // }

    count = result.size(ofArray: "value").intValue
    i = 0
    while i < count {
        result.i = i
        print("name: \(result.string(of: "value[i].name")!)")
        print("role: \(result.string(of: "value[i].role")!)")
        print("id: \(result.int(of: "value[i].id").intValue)")
        print("")
        i = i + 1
    }


}