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

Appends values to an existing Google spreadsheet.

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#include <CkJsonObjectW.h>
#include <CkHttpW.h>
#include <CkHttpResponseW.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..
    CkJsonObjectW jsonToken;
    bool success = jsonToken.LoadFile(L"qa_data/tokens/googleSheets.json");
    if (jsonToken.HasMember(L"access_token") == false) {
        wprintf(L"No access token found.\n");
        return;
    }

    CkHttpW http;
    http.put_AuthToken(jsonToken.stringOf(L"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"
    //     ]
    //   ]
    // }

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

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

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

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

    json.put_EmitCompact(false);
    wprintf(L"%s\n",json.emit());

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

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

    wprintf(L"response status code = %d\n",resp->get_StatusCode());
    wprintf(L"response JSON = %s\n",resp->bodyStr());

    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:
    // 
    }