(Swift 3,4,5...) Google Sheets - Append Values to an Existing Spreadsheet

Appends values to an existing Google spreadsheet.

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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
    }

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

    // To append values to an existing spreadsheet, our HTTP request body will
    // contain JSON in the format of a "ValueRange".  For example, the spreadsheet we'll be
    // adding to in this example looks like this:

    // 

    // The JSON ValueRange for the cells in the above spreadsheet is:
    // {
    //   "range": "Sheet1!A1:B5",
    //   "majorDimension": "ROWS",
    //   "values": [
    //     [
    //       "Item",
    //       "Cost"
    //     ],
    //     [
    //       "Wheel",
    //       "$20.50"
    //     ],
    //     [
    //       "Door",
    //       "$15"
    //     ],
    //     [
    //       "Engine",
    //       "$100"
    //     ],
    //     [
    //       "Totals",
    //       "$135.50"
    //     ]
    //   ]
    // }

    // This example will append 6 cells (3 rows / 2 columns).
    // We'll be appending the following:
    // 
    // "Paint", "$100"
    // "Brakes", "$100"
    // "New Total", "$335.50"
    // 

    // The range of cells we'll be appending is A1:B5
    // Therefore, the ValueRange JSON we'll be sending in our POST body is:

    // {
    //   "range": "Sheet1!A1:B5",
    //   "majorDimension": "ROWS",
    //   "values": [
    //     [
    //       "Paint",
    //       "$100"
    //     ],
    //     [
    //       "Brakes",
    //       "$100"
    //     ],
    //     [
    //       "New Total",
    //       "$335.50"
    //     ]
    //   ]
    // }

    let json = CkoJsonObject()!
    json.update("range", value: "Sheet1!A1:B5")
    json.update("majorDimension", value: "ROWS")

    json.i = 0
    json.j = 1
    json.update("values[i][j]", value: "Paint")
    json.j = 1
    json.update("values[i][j]", value: "$100")

    json.i = 1
    json.j = 0
    json.update("values[i][j]", value: "Brakes")
    json.j = 1
    json.update("values[i][j]", value: "$100")

    json.i = 2
    json.j = 0
    json.update("values[i][j]", value: "Totals")
    json.j = 1
    json.update("values[i][j]", value: "$335.50")

    json.emitCompact = false
    print("\(json.emit()!)")

    // Send the POST to:
    // https://sheets.googleapis.com/v4/spreadsheets/{spreadsheetId}/values/{range}:append?valueInputOption=USER_ENTERED

    http.setUrlVar("spreadsheetId", value: "1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA")
    http.setUrlVar("range", value: "Sheet1!A1:B5")
    var resp: CkoHttpResponse? = http.postJson("https://sheets.googleapis.com/v4/spreadsheets/{$spreadsheetId}/values/{$range}:append?valueInputOption=USER_ENTERED", jsonText: json.emit())
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    print("response status code = \(resp!.statusCode.intValue)")
    print("response JSON = \(resp!.bodyStr!)")

    resp = nil

    // Sample output:
    // 
    // response status code = 200
    // response JSON = {
    //   "spreadsheetId": "1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA",
    //   "tableRange": "Sheet1!A1:B5",
    //   "updates": {
    //     "spreadsheetId": "1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA",
    //     "updatedRange": "Sheet1!A6:B8",
    //     "updatedRows": 3,
    //     "updatedColumns": 2,
    //     "updatedCells": 6
    //   }
    // }
    // 

    // Our Google Spreadsheet now looks like this:
    // 

}