(Xojo Plugin) Twitter - Get Follower IDs

Demonstrates how to get a list of follower IDs for a Twitter user. If the number of followers is more than can be returned in a single response, this example will use cursors to page through the followers.

Note: Rate limits will prevent a program from paging through huge lists of followers. In general, a maximum of 16 GET requests (pages) can be retrieved in a short period of time.

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

// ----------------------------------------------------------------------
// This initial setup, which involves setting the OAuth1 properties and connecting
// to api.twitter.com, is only required once at the beginning.  Once connected, the same
// object instance may be re-used, and if necessary, it will automatically reconnect
// as needed.

// Assume we've previously obtained an access token and saved it to a JSON file..
Dim json As New Chilkat.JsonObject
Dim success As Boolean
success = json.LoadFile("qa_data/tokens/twitter.json")

Dim rest As New Chilkat.Rest
Dim oauth1 As New Chilkat.OAuth1

oauth1.ConsumerKey = "TWITTER_CONSUMER_KEY"
oauth1.ConsumerSecret = "TWITTER_CONSUMER_SECRET"
oauth1.Token = json.StringOf("oauth_token")
oauth1.TokenSecret = json.StringOf("oauth_token_secret")
oauth1.SignatureMethod = "HMAC-SHA1"
success = oauth1.GenNonce(16)

success = rest.SetAuthOAuth1(oauth1,False)

Dim bAutoReconnect As Boolean
bAutoReconnect = True
success = rest.Connect("api.twitter.com",443,True,bAutoReconnect)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// This ends the initial setup...
// ----------------------------------------------------------------------

// This Twitter user has about 77.5K followers..
success = rest.AddQueryParam("screen_name","MarcusMiller959")

Dim jsonResponse As New Chilkat.JsonObject
jsonResponse.EmitCompact = False

// Get the 1st page of results using a cursor of "-1".
Dim sbNextCursor As New Chilkat.StringBuilder
success = sbNextCursor.SetString("-1")

Dim pageNum As Int32
pageNum = 1
Dim caseSensitive As Boolean
caseSensitive = False
Dim bContinue As Boolean
bContinue = True
// Get a maximum of 5 pages (of 5000 ids each).
While bContinue = True

    If (sbNextCursor.ContentsEqual("0",caseSensitive) = True) Then
        // This will cause the loop to exit..
        bContinue = False
    Else
        // Adds or replaces the query param.
        success = rest.AddQueryParam("cursor",sbNextCursor.GetAsString())

        // Get the next page of follower IDs
        Dim resp As String
        resp = rest.FullRequestNoBody("GET","/1.1/followers/ids.json")
        If (rest.LastMethodSuccess <> True) Then
            System.DebugLog(rest.LastErrorText)
            Return
        End If

        success = jsonResponse.Load(resp)

        If (rest.ResponseStatusCode <> 200) Then
            System.DebugLog(jsonResponse.Emit())
            Return
        End If

        // Show the number of IDs returned in this 
        Dim numIds As Int32
        numIds = jsonResponse.SizeOfArray("ids")
        System.DebugLog("Page " + Str(pageNum) + ", Number of Ids: " + Str(numIds))

        // Show the 1st 10 ids in this page.
        Dim i As Int32
        i = 0
        While i < numIds
            jsonResponse.I = i
            System.DebugLog("    " + Str(i) + ": " + jsonResponse.StringOf("ids[i]"))

            i = i + 1
            If (i > 10) Then
                // Force the loop to exit.
                i = numIds
            End If

        Wend

        pageNum = pageNum + 1
        If (pageNum > 5) Then
            bContinue = False
        Else
            success = sbNextCursor.SetString(jsonResponse.StringOf("next_cursor_str"))
        End If

    End If

Wend

// A successful JSON response for the 1st page looks like this:

// 	{
// 	  "ids": [
// 	    3140496044,
// 	    793204773751324672,
// 	    789951187781050369,
// 	    763520773587922945,
// 	    ...
// 	    15031286,
// 	    2668251246,
// 	    3751659443
// 	  ],
// 	  "next_cursor": 1531680438812851153,
// 	  "next_cursor_str": "1531680438812851153",
// 	  "previous_cursor": 0,
// 	  "previous_cursor_str": "0"
// 	}

// The output of this program looks like this:

// 	Page 1, Number of Ids: 5000
// 	    0: 931953350
// 	    1: 786708055
// 	    2: 560845700
// 	    3: 3140496044
// 	    4: 793204773751324672
// 	    5: 789951187781050369
// 	    6: 763520773587922945
// 	    7: 793143274059988992
// 	    8: 793139683412762624
// 	    9: 1588222783
// 	    10: 703821370778451968
// 	Page 2, Number of Ids: 5000
// 	    0: 15031286
// 	    1: 2668251246
// 	    2: 3751659443
// 	    3: 3324584493
// 	    4: 2440214809
// 	    5: 1322335441
// 	    6: 4439178393
// 	    7: 4911573711
// 	    8: 720792880080560128
// 	    9: 720805087124267008
// 	    10: 172926330
// 	Page 3, Number of Ids: 5000
// 	    0: 93867176
// 	    1: 2992946183
// 	    2: 2825296077
// 	    3: 3784572861
// 	    4: 2150051321
// 	    5: 2460881603
// 	    6: 4128849341
// 	    7: 2234697931
// 	    8: 2379418164
// 	    9: 3425171542
// 	    10: 325759186
// 	Page 4, Number of Ids: 5000
// 	    0: 22793412
// 	    1: 3347750489
// 	    2: 316923043
// 	    3: 2481719196
// 	    4: 3363591905
// 	    5: 3238116492
// 	    6: 58467130
// 	    7: 3015182362
// 	    8: 2985342719
// 	    9: 3095965720
// 	    10: 17505957
// 	Page 5, Number of Ids: 5000
// 	    0: 2541434684
// 	    1: 140022957
// 	    2: 134845054
// 	    3: 772810508
// 	    4: 16979294
// 	    5: 2320540225
// 	    6: 105439442
// 	    7: 2796744529
// 	    8: 251128801
// 	    9: 350229758
// 	    10: 2683994716
//