(PowerBuilder) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Oauth2
oleobject loo_Rest
integer li_Success
string ls_ResponseJson
oleobject loo_Json
oleobject loo_Dtime
integer li_BLocalTime
oleobject loo_Dt
integer i
integer li_NumItems
string ls_Message
string ls_Story
string ls_PrevUrl
string ls_NextUrl

// 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
loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat_9_5_0.OAuth2")
if li_rc < 0 then
    destroy loo_Oauth2
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")

// Connect to Facebook and send the following GET request:
li_Success = loo_Rest.Connect("graph.facebook.com",443,1,1)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Oauth2
    destroy loo_Rest
    return
end if

// Provide the authentication credentials (i.e. the access key)
loo_Rest.SetAuthOAuth2(loo_Oauth2)

// We could limit the number of posts.  The default limit is 25.
loo_Rest.AddQueryParam("limit","5")

ls_ResponseJson = loo_Rest.FullRequestNoBody("GET","/v2.7/me/feed")
if loo_Rest.LastMethodSuccess <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Oauth2
    destroy loo_Rest
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.EmitCompact = 0
loo_Json.Load(ls_ResponseJson)

// Show the JSON in human-readable format.
Write-Debug loo_Json.Emit()

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

loo_Dtime = create oleobject
li_rc = loo_Dtime.ConnectToNewObject("Chilkat_9_5_0.CkDateTime")

li_BLocalTime = 1

i = 0
li_NumItems = loo_Json.SizeOfArray("data")
do while i < li_NumItems
    loo_Json.I = i
    Write-Debug "--- " + string(i)
    ls_Message = loo_Json.StringOf("data[i].message")
    if loo_Json.LastMethodSuccess = 1 then
        Write-Debug "message: " + ls_Message
    end if

    ls_Story = loo_Json.StringOf("data[i].story")
    if loo_Json.LastMethodSuccess = 1 then
        Write-Debug "story: " + ls_Story
    end if

    Write-Debug "id: " + loo_Json.StringOf("data[i].id")

    // We can load the created_time into a CkDateTime...
    loo_Dtime.SetFromTimestamp(loo_Json.StringOf("data[i].created_time"))
    loo_Dt = loo_Dtime.GetDtObj(li_BLocalTime)
    Write-Debug string(loo_Dt.Month) + "/" + string(loo_Dt.Day) + "/" + string(loo_Dt.Year) + "  " + string(loo_Dt.Hour) + ":" + string(loo_Dt.Minute)
    destroy loo_Dt
    i = i + 1
loop

// Finally, there are two paging URLs at the very bottom.  Those can be accessed as shown:
ls_PrevUrl = loo_Json.StringOf("paging.previous")
Write-Debug "URL for previous page: " + ls_PrevUrl

ls_NextUrl = loo_Json.StringOf("paging.next")
Write-Debug "URL for next page: " + ls_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"
//   }
// }
// 


destroy loo_Oauth2
destroy loo_Rest
destroy loo_Json
destroy loo_Dtime