(Swift 3,4,5...) batchGet (Read Multiple Ranges)

Reads multiple ranges from a Google Sheets spreadsheet in one GET request.

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

    // This example uses a previously obtained access token having permission for the 
    // Google Sheets scope.

    // In this example, Get Google Sheets OAuth2 Access Token, the access
    // token was saved to a JSON file.  This example fetches the access token from the file..
    let jsonToken = CkoJsonObject()!
    var success: Bool = jsonToken.loadFile("qa_data/tokens/googleSheets.json")
    if jsonToken.hasMember("access_token") == false {
        print("No access token found.")
        return
    }

    // We'll be sending a GET request with query params to this URL:  https://sheets.googleapis.com/v4/spreadsheets/spreadsheetId/values:batchGet?ranges=Sheet1!A1:A2&ranges=Sheet1!B1:B2
    // The domain is "sheets.googleapis.com"
    // The path is "/v4/spreadsheets/spreadsheetId/values:batchGet"
    let req = CkoHttpRequest()!
    req.path = "/v4/spreadsheets/spreadsheetId/values:batchGet"
    req.httpVerb = "GET"
    // Add each range to fetch.
    req.addParam("ranges", value: "Sheet1!A1:A2")
    req.addParam("ranges", value: "Sheet1!B1:B2")

    let http = CkoHttp()!
    http.authToken = jsonToken.string(of: "access_token")

    // 443 is the SSL/TLS port for HTTPS.
    var resp: CkoHttpResponse? = http.synchronousRequest("sheets.googleapis.com", port: 443, ssl: true, req: req)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    print("\(resp!.bodyStr!)")

    let json = CkoJsonObject()!
    json.load(resp!.bodyStr)

    resp = nil

    // A sample response is shown below.
    // To generate the parsing source code for a JSON response, paste
    // the JSON into this online tool: Generate JSON parsing code

    // {
    //   "spreadsheetId": "1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA",
    //   "valueRanges": [
    //     {
    //       "range": "Sheet1!A1:A2",
    //       "majorDimension": "ROWS",
    //       "values": [
    //         [
    //           "Item"
    //         ],
    //         [
    //           "Wheel"
    //         ]
    //       ]
    //     },
    //     {
    //       "range": "Sheet1!B1:B2",
    //       "majorDimension": "ROWS",
    //       "values": [
    //         [
    //           "Cost"
    //         ],
    //         [
    //           "$20.50"
    //         ]
    //       ]
    //     }
    //   ]
    // }

    var i: Int
    var count_i: Int
    var j: Int
    var count_j: Int
    var k: Int
    var count_k: Int

    var spreadsheetId: String? = json.string(of: "spreadsheetId")
    i = 0
    count_i = json.size(ofArray: "valueRanges").intValue
    while i < count_i {
        json.i = i
        var range: String? = json.string(of: "valueRanges[i].range")
        var majorDimension: String? = json.string(of: "valueRanges[i].majorDimension")
        j = 0
        count_j = json.size(ofArray: "valueRanges[i].values").intValue
        while j < count_j {
            json.j = j
            k = 0
            count_k = json.size(ofArray: "valueRanges[i].values[j]").intValue
            while k < count_k {
                json.k = k
                var strVal: String? = json.string(of: "valueRanges[i].values[j][k]")
                k = k + 1
            }

            j = j + 1
        }

        i = i + 1
    }


}