(Swift 3,4,5...) WiX OAuth2 Access Token

Demonstrates how to get an access token for the WiX API. This example is for desktop apps only (not web apps).

Note: This example requires Chilkat v9.5.0.84 or greater.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // IMPORTANT: This example requires Chilkat v9.5.0.84 or greater because WiX does OAuth2 in a non-standard way.
    // Internal modifications were made in Chilkat v9.5.0.84 to automatically accomodate the non-standard WiX implementation.

    let oauth2 = CkoOAuth2()!
    var success: Bool

    // This should be the port in the localhost redirect URL for your app.  
    // The redirect URL would look like "http://localhost:3017/" if the port number is 3017.
    oauth2.listenPort = 3017

    // See https://dev.wix.com/api/rest/getting-started/authentication
    oauth2.authorizationEndpoint = "https://www.wix.com/app-oauth-installation/consent"
    oauth2.tokenEndpoint = "https://www.wix.com/oauth/access"

    // Replace these with actual values.
    oauth2.clientId = "CLIENT_ID"
    oauth2.clientSecret = "CLIENT_SECRET"

    // WiX is different than most other OAuth2 authorizations when it comes to scope.
    // The scopes are assigned to your defined application in the "Permissions" part of the developers console (https://dev.wix.com/....)
    // where you define your App (i.e. where the App ID, App Secret Key, Redirect URL, etc. are defined).
    oauth2.scope = ""

    // Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
    var url: String? = oauth2.start()
    if oauth2.lastMethodSuccess != true {
        print("\(oauth2.lastErrorText!)")
        return
    }

    // At this point, your application should load the URL in a browser.
    // For example, 
    // in C#: System.Diagnostics.Process.Start(url);
    // in Java: Desktop.getDesktop().browse(new URI(url));
    // in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
    //              wsh.Run url
    // in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
    // in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
    // The Microsoft account owner would interactively accept or deny the authorization request.

    // Add the code to load the url in a web browser here...
    // Add the code to load the url in a web browser here...
    // Add the code to load the url in a web browser here...

    // Now wait for the authorization.
    // We'll wait for a max of 30 seconds.
    var numMsWaited: Int = 0
    while (numMsWaited < 30000) && (oauth2.authFlowState.intValue < 3) {
        oauth2.sleepMs(100)
        numMsWaited = numMsWaited + 100
    }

    // If there was no response from the browser within 30 seconds, then 
    // the AuthFlowState will be equal to 1 or 2.
    // 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
    // 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
    // In that case, cancel the background task started in the call to StartAuth.
    if oauth2.authFlowState.intValue < 3 {
        oauth2.cancel()
        print("No response from the browser!")
        return
    }

    // Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
    // The possible AuthFlowState values are:
    // 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
    // 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
    // 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
    if oauth2.authFlowState.intValue == 5 {
        print("OAuth2 failed to complete.")
        print("\(oauth2.failureInfo!)")
        return
    }

    if oauth2.authFlowState.intValue == 4 {
        print("OAuth2 authorization was denied.")
        print("\(oauth2.accessTokenResponse!)")
        return
    }

    if oauth2.authFlowState.intValue != 3 {
        print("Unexpected AuthFlowState:\(oauth2.authFlowState.intValue)")
        return
    }

    print("OAuth2 authorization granted!")
    print("Access Token = \(oauth2.accessToken!)")

    // Get the full JSON response:
    let json = CkoJsonObject()!
    json.load(oauth2.accessTokenResponse)
    json.emitCompact = false

    // The JSON response looks like this:

    // {
    //   "refresh_token": "OAUTH2.eyJraW ... vnB4cQ",
    //   "access_token": "OAUTH2.eyJraW ... 18lrw"
    // }

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

    // Save the JSON to a file for future requests.
    let fac = CkoFileAccess()!
    fac.writeEntireTextFile("qa_data/tokens/wix.json", fileData: json.emit(), charset: "utf-8", includePreamble: false)

}