(PureBasic) Facebook User Feed (Read Posts)

Demonstrates how to read the feed of posts (including status updates) and links published by this person, or by others on this person's profile. This introductory example gets the first few posts.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkDtObj.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkOAuth2.pb"
IncludeFile "CkDateTime.pb"

Procedure ChilkatExample()

    ; 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.i = CkOAuth2::ckCreate()
    If oauth2.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkOAuth2::setCkAccessToken(oauth2, "FACEBOOK-ACCESS-TOKEN")

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Connect to Facebook and send the following GET request:
    success.i = CkRest::ckConnect(rest,"graph.facebook.com",443,1,1)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkOAuth2::ckDispose(oauth2)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ; Provide the authentication credentials (i.e. the access key)
    CkRest::ckSetAuthOAuth2(rest,oauth2)

    ; We could limit the number of posts.  The default limit is 25.
    CkRest::ckAddQueryParam(rest,"limit","5")

    responseJson.s = CkRest::ckFullRequestNoBody(rest,"GET","/v2.7/me/feed")
    If CkRest::ckLastMethodSuccess(rest) <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkOAuth2::ckDispose(oauth2)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::setCkEmitCompact(json, 0)
    CkJsonObject::ckLoad(json,responseJson)

    ; Show the JSON in human-readable format.
    Debug CkJsonObject::ckEmit(json)

    ; A sample JSON response is shown below.  
    ; This is the code to parse the JSON response.

    dtime.i = CkDateTime::ckCreate()
    If dtime.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    bLocalTime.i = 1

    dt.i
    i.i = 0
    numItems.i = CkJsonObject::ckSizeOfArray(json,"data")
    While i < numItems
        CkJsonObject::setCkI(json, i)
        Debug "--- " + Str(i)
        message.s = CkJsonObject::ckStringOf(json,"data[i].message")
        If CkJsonObject::ckLastMethodSuccess(json) = 1
            Debug "message: " + message
        EndIf

        story.s = CkJsonObject::ckStringOf(json,"data[i].story")
        If CkJsonObject::ckLastMethodSuccess(json) = 1
            Debug "story: " + story
        EndIf

        Debug "id: " + CkJsonObject::ckStringOf(json,"data[i].id")

        ; We can load the created_time into a CkDateTime...
        CkDateTime::ckSetFromTimestamp(dtime,CkJsonObject::ckStringOf(json,"data[i].created_time"))
        dt = CkDateTime::ckGetDtObj(dtime,bLocalTime)
        Debug Str(CkDtObj::ckMonth(dt)) + "/" + Str(CkDtObj::ckDay(dt)) + "/" + Str(CkDtObj::ckYear(dt)) + "  " + Str(CkDtObj::ckHour(dt)) + ":" + Str(CkDtObj::ckMinute(dt))
        CkDtObj::ckDispose(dt)

        i = i + 1
    Wend

    ; Finally, there are two paging URLs at the very bottom.  Those can be accessed as shown:
    prevUrl.s = CkJsonObject::ckStringOf(json,"paging.previous")
    Debug "URL for previous page: " + prevUrl

    nextUrl.s = CkJsonObject::ckStringOf(json,"paging.next")
    Debug "URL for next page: " + nextUrl

    ; -------------------------------------------------------------------
    ; This is a sample JSON response..
    ; { 
    ;   "data": [
    ;     { 
    ;       "message": "This is the first post.",
    ;       "created_time": "2016-09-28T14:36:45+0000",
    ;       "id": "12345678901234567_12345678900000001"
    ;     },
    ;     { 
    ;       "message": "This is the 2nd post.",
    ;       "created_time": "2016-09-27T03:26:12+0000",
    ;       "id": "12345678901234567_12345678900000002"
    ;     },
    ;     { 
    ;       "story": "John Doe shared Mary's post.",
    ;       "created_time": "2016-09-26T15:45:10+0000",
    ;       "id": "12345678901234567_12345678900000003"
    ;     },
    ;     { 
    ;       "message": "https:\/\/www.somewebsite.org\/?ID=8158",
    ;       "created_time": "2016-09-26T02:29:20+0000",
    ;       "id": "12345678901234567_12345678900000004"
    ;     },
    ;     { 
    ;       "message": "http:\/\/blog.somebody.com\/post\/123",
    ;       "created_time": "2016-09-26T02:02:56+0000",
    ;       "id": "12345678901234567_12345678900000005"
    ;     },
    ;     { 
    ;       "story": "John Doe shared Bill's photo.",
    ;       "created_time": "2016-09-25T15:32:09+0000",
    ;       "id": "12345678901234567_12345678900000006"
    ;     },
    ;     { 
    ;       "message": "Check this out...",
    ;       "story": "John Doe shared NPR Music's video.",
    ;       "created_time": "2016-09-25T14:54:52+0000",
    ;       "id": "12345678901234567_12345678900000007"
    ;     },
    ;     { 
    ;       "message": "Yet another post...",
    ;       "created_time": "2016-09-24T17:21:30+0000",
    ;       "id": "12345678901234567_12345678900000008"
    ;     },
    ;     { 
    ;       "message": "http:\/\/www.somewhere.com\/blahblahblah\/",
    ;       "created_time": "2016-09-23T22:20:29+0000",
    ;       "id": "12345678901234567_12345678900000009"
    ;     },
    ;     { 
    ;       "message": "At Lincoln marsh ...",
    ;       "story": "John Doe added 2 new photos.",
    ;       "created_time": "2016-09-19T02:00:43+0000",
    ;       "id": "12345678901234567_12345678900000010"
    ;     },
    ;     { 
    ;       "message": "I would've went for a swim had it not been for the sign",
    ;       "created_time": "2016-09-19T01:59:47+0000",
    ;       "id": "12345678901234567_12345678900000011"
    ;     },
    ;     { 
    ;       "story": "John Doe shared Steve's video.",
    ;       "created_time": "2016-09-17T22:00:02+0000",
    ;       "id": "12345678901234567_12345678900000012"
    ;     },
    ;     { 
    ;       "message": "Another sample message...",
    ;       "story": "John Doe shared XYZ's post.",
    ;       "created_time": "2016-09-17T14:13:16+0000",
    ;       "id": "12345678901234567_12345678900000013"
    ;     },
    ;     { 
    ;       "message": "Hello World!",
    ;       "created_time": "2016-09-16T23:17:13+0000",
    ;       "id": "12345678901234567_12345678900000014"
    ;     },
    ;     { 
    ;       "message": "https:\/\/www.youtube.com\/watch?v=xyz",
    ;       "created_time": "2016-09-15T04:13:02+0000",
    ;       "id": "12345678901234567_12345678900000015"
    ;     },
    ;     { 
    ;       "story": "John Doe shared Emily's photo.",
    ;       "created_time": "2016-09-14T16:37:10+0000",
    ;       "id": "12345678901234567_12345678900000016"
    ;     },
    ;     { 
    ;       "story": "John Doe shared Vincent's photo.",
    ;       "created_time": "2016-09-14T14:03:42+0000",
    ;       "id": "12345678901234567_12345678900000017"
    ;     },
    ;     { 
    ;       "message": "https:\/\/www.chilkatsoft.com\/",
    ;       "created_time": "2016-09-14T02:29:37+0000",
    ;       "id": "12345678901234567_12345678900000018"
    ;     },
    ;     { 
    ;       "message": "So cool!  Marcus jamming with this 16 year old kid...",
    ;       "created_time": "2016-09-13T17:04:53+0000",
    ;       "id": "12345678901234567_12345678900000019"
    ;     },
    ;     { 
    ;       "message": "Wow!",
    ;       "story": "John Doe shared Somebody's post.",
    ;       "created_time": "2016-09-13T14:11:18+0000",
    ;       "id": "12345678901234567_12345678900000020"
    ;     }
    ;   ],
    ;   "paging": { 
    ;     "previous": "https:\/\/graph.facebook.com\/v2.7\/12345678901234567\/feed?since=1475073405&limit=25&__paging_token=enc_abcT9x9GFabcTxvnyXZC0xnHZCrH2h4yjNZCZAUabcZAI9TyZBibwat6wCYiSFTxR4nSDZAkzaN8vIaEPmqrabc1QTIbGac&__previous=1",
    ;     "next": "https:\/\/graph.facebook.com\/v2.7\/12345678901234567\/feed?limit=25&until=1473426350&__paging_token=enc_AdDFWabcYtV5ob6lFO8LZAMhm7LKCxntawqqabcZALyC8WZB8Th2lON7HGuJRabzW6Ivfm93LORIw9NNBuHpob7abcjh"
    ;   }
    ; }
    ; 


    CkOAuth2::ckDispose(oauth2)
    CkRest::ckDispose(rest)
    CkJsonObject::ckDispose(json)
    CkDateTime::ckDispose(dtime)


    ProcedureReturn
EndProcedure