(Unicode C) Read a Single Facebook Post

Demonstrates how to read the contents of a single Facebook post. A post is an individual entry in a profile's feed. The profile could be a user, page, app, or group.

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#include <C_CkOAuth2W.h>
#include <C_CkRestW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkDateTimeW.h>
#include <C_CkDtObjW.h>

void ChilkatSample(void)
    {
    HCkOAuth2W oauth2;
    HCkRestW rest;
    BOOL success;
    const wchar_t *postId;
    HCkStringBuilderW sbPath;
    const wchar_t *responseJson;
    HCkJsonObjectW json;
    HCkDateTimeW dtime;
    BOOL bLocalTime;
    HCkDtObjW dt;

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

    // This example assumes a previously obtained an access token
    oauth2 = CkOAuth2W_Create();
    CkOAuth2W_putAccessToken(oauth2,L"FACEBOOK-ACCESS-TOKEN");

    rest = CkRestW_Create();

    // Connect to Facebook...
    success = CkRestW_Connect(rest,L"graph.facebook.com",443,TRUE,TRUE);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        return;
    }

    // Provide the authentication credentials (i.e. the access key)
    CkRestW_SetAuthOAuth2(rest,oauth2);

    // This example assumes a post id was already retrieved.
    // For example, it could've been retrieved by reading the user's feed:
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    postId = L"10224048320139890_10210156138515282";

    sbPath = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbPath,L"/v2.7/");
    CkStringBuilderW_Append(sbPath,postId);

    // Select the fields we want.
    // This example will select almost all the possible fields.
    // See https://developers.facebook.com/docs/graph-api/reference/post/
    CkRestW_AddQueryParam(rest,L"fields",L"id,message,created_time,caption,description,from,link,name,object_id,picture,place,privacy,properties,shares,source,status_type,story,targeting,to,type,updated_time,with_tags");

    responseJson = CkRestW_fullRequestNoBody(rest,L"GET",CkStringBuilderW_getAsString(sbPath));
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkOAuth2W_Dispose(oauth2);
        CkRestW_Dispose(rest);
        CkStringBuilderW_Dispose(sbPath);
        return;
    }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_putEmitCompact(json,FALSE);
    CkJsonObjectW_Load(json,responseJson);

    // Show the JSON in human-readable format.
    wprintf(L"%s\n",CkJsonObjectW_emit(json));

    // A sample JSON response is shown here.  
    // { 
    //   "id": "12345678901234567_12345678900000004",
    //   "message": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
    //   "created_time": "2016-09-29T20:46:18+0000",
    //   "from": { 
    //     "name": "John Doe",
    //     "id": "12345678901234567"
    //   },
    //   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026247451&set=a.1237223526054.2038240.1094202869&type=3",
    //   "object_id": "10210139026347451",
    //   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026647451_7830642117574407060_n.jpg?oh=a7f9ed10ce9cd81a82adeb541c60e2e2&oe=58ABB195",
    //   "privacy": { 
    //     "allow": "",
    //     "deny": "",
    //     "description": "Public",
    //     "friends": "",
    //     "value": "EVERYONE"
    //   },
    //   "status_type": "added_photos",
    //   "type": "photo",
    //   "updated_time": "2016-09-29T20:46:18+0000"
    // }

    // This is the code to parse some fields in the JSON response.
    wprintf(L"type: %s\n",CkJsonObjectW_stringOf(json,L"type"));
    wprintf(L"message: %s\n",CkJsonObjectW_stringOf(json,L"message"));
    wprintf(L"id: %s\n",CkJsonObjectW_stringOf(json,L"id"));
    wprintf(L"link: %s\n",CkJsonObjectW_stringOf(json,L"link"));
    wprintf(L"privacy descripton: %s\n",CkJsonObjectW_stringOf(json,L"privacy.description"));

    dtime = CkDateTimeW_Create();
    bLocalTime = TRUE;
    CkDateTimeW_SetFromTimestamp(dtime,CkJsonObjectW_stringOf(json,L"created_time"));
    dt = CkDateTimeW_GetDtObj(dtime,bLocalTime);
    wprintf(L"%d/%d/%d  %d:%d\n",CkDtObjW_getMonth(dt),CkDtObjW_getDay(dt),CkDtObjW_getYear(dt),CkDtObjW_getHour(dt),CkDtObjW_getMinute(dt));
    CkDtObjW_Dispose(dt);


    CkOAuth2W_Dispose(oauth2);
    CkRestW_Dispose(rest);
    CkStringBuilderW_Dispose(sbPath);
    CkJsonObjectW_Dispose(json);
    CkDateTimeW_Dispose(dtime);

    }