(C++) Google Sheets - Append Values to an Existing Spreadsheet

Appends values to an existing Google spreadsheet.

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#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    //  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..
    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/googleSheets.json");
    if (jsonToken.HasMember("access_token") == false) {
        std::cout << "No access token found." << "\r\n";
        return;
    }

    CkHttp http;
    http.put_AuthToken(jsonToken.stringOf("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"
    //      ]
    //    ]
    //  }

    CkJsonObject json;
    json.UpdateString("range","Sheet1!A1:B5");
    json.UpdateString("majorDimension","ROWS");

    json.put_I(0);
    json.put_J(1);
    json.UpdateString("values[i][j]","Paint");
    json.put_J(1);
    json.UpdateString("values[i][j]","$100");

    json.put_I(1);
    json.put_J(0);
    json.UpdateString("values[i][j]","Brakes");
    json.put_J(1);
    json.UpdateString("values[i][j]","$100");

    json.put_I(2);
    json.put_J(0);
    json.UpdateString("values[i][j]","Totals");
    json.put_J(1);
    json.UpdateString("values[i][j]","$335.50");

    json.put_EmitCompact(false);
    std::cout << json.emit() << "\r\n";

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

    http.SetUrlVar("spreadsheetId","1_SO2L-Y6nCayNpNppJLF0r9yHB2UnaCleGCKeE4O0SA");
    http.SetUrlVar("range","Sheet1!A1:B5");
    CkHttpResponse *resp = http.PostJson("https://sheets.googleapis.com/v4/spreadsheets/{$spreadsheetId}/values/{$range}:append?valueInputOption=USER_ENTERED",json.emit());
    if (http.get_LastMethodSuccess() != true) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "response status code = " << resp->get_StatusCode() << "\r\n";
    std::cout << "response JSON = " << resp->bodyStr() << "\r\n";

    delete resp;

    //  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:
    //  
    }