Unicode C

BatchModify - Add a Label to each Message in Search Results

See more GMail REST API Examples

Searchs GMail for messages meeting a criteria and adds a label to each message found. Unicode C

#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    const wchar_t *userId;
    const wchar_t *query;
    const wchar_t *url;
    HCkStringBuilderW sb;
    HCkJsonObjectW json;
    HCkJsonObjectW json2;
    int i;
    int numMessages;
    const wchar_t *id;
    const wchar_t *labelId;
    HCkHttpResponseW resp;

    success = FALSE;

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

    http = CkHttpW_Create();
    CkHttpW_putAuthToken(http,L"GMAIL-ACCESS-TOKEN");

    userId = L"me";
    CkHttpW_SetUrlVar(http,L"userId",userId);

    query = L"subject:questions";
    CkHttpW_SetUrlVar(http,L"query",query);

    url = L"https://www.googleapis.com/gmail/v1/users/{$userId}/messages?q={$query}";

    sb = CkStringBuilderW_Create();
    success = CkHttpW_QuickGetSb(http,url,sb);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sb);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(json,sb);
    CkJsonObjectW_putEmitCompact(json,FALSE);
    wprintf(L"%s\n",CkJsonObjectW_emit(json));

    if (CkHttpW_getLastStatus(http) != 200) {
        wprintf(L"Failed.\n");
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sb);
        CkJsonObjectW_Dispose(json);
        return;
    }

    //  If successful, the received JSON looks like this:
    //  {
    //    "messages": [
    //      {
    //        "id": "166f583051d36144",
    //        "threadId": "166f583051d36144"
    //      },
    //      {
    //        "id": "166f5815e1f36144",
    //        "threadId": "166f5815e1f36144"
    //      },
    //  	...
    //      {
    //        "id": "166f580639e36144",
    //        "threadId": "166f580639e36144"
    //      },
    //      {
    //        "id": "15dbc2e28ec789c6",
    //        "threadId": "15dbc2e28ec789c6"
    //      }
    //    ],
    //    "nextPageToken": "13434766102274844688",
    //    "resultSizeEstimate": 103
    //  }
    //  

    //  Next, we'll be sending an HTTP POST to add the label "questions" to each message in the
    //  search results.  The JSON to be sent for the batchModify is this:

    //  	{
    //  	  "ids": [
    //  	    string
    //  	  ],
    //  	  "addLabelIds": [
    //  	    string
    //  	  ],
    //  	  "removeLabelIds": [
    //  	    string
    //  	  ]
    //  	}

    //  We'll omit "removeLabelIds" because we're not removing any labels.
    //  We are parsing the JSON search results, and at the same time building the batchModify JSON.

    json2 = CkJsonObjectW_Create();

    i = 0;
    numMessages = CkJsonObjectW_SizeOfArray(json,L"messages");
    while ((i < numMessages)) {
        CkJsonObjectW_putI(json,i);
        id = CkJsonObjectW_stringOf(json,L"messages[i].id");
        CkJsonObjectW_putI(json2,i);
        CkJsonObjectW_UpdateString(json2,L"ids[i]",id);
        i = i + 1;
    }

    //  We need the id of the label (not the name).
    //  I know the name of the label is "questions", but I need to know the id.
    //  See this example: Get Label Id by Name
    //  The id of my label named "questions" is "Label_43"
    labelId = L"Label_43";
    CkJsonObjectW_UpdateString(json2,L"addLabelIds[0]",labelId);
    CkJsonObjectW_UpdateNewArray(json2,L"removeLabelIds");

    CkJsonObjectW_putEmitCompact(json2,FALSE);
    wprintf(L"%s\n",CkJsonObjectW_emit(json2));

    //  Send the batchModify
    url = L"https://www.googleapis.com/gmail/v1/users/{$userId}/messages/batchModify";
    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpJson(http,L"POST",url,json2,L"application/json",resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sb);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(json2);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    wprintf(L"status = %d\n",CkHttpResponseW_getStatusCode(resp));

    //  A 204 response status indicate success.
    if (CkHttpResponseW_getStatusCode(resp) != 204) {
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
        wprintf(L"Failed.\n");
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sb);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(json2);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    //  The 204 response has an empty response body..

    wprintf(L"BatchModify success!\n");


    CkHttpW_Dispose(http);
    CkStringBuilderW_Dispose(sb);
    CkJsonObjectW_Dispose(json);
    CkJsonObjectW_Dispose(json2);
    CkHttpResponseW_Dispose(resp);

    }