AutoIt
BatchModify - Add a Label to each Message in Search Results

Searchs GMail for messages meeting a criteria and adds a label to each message found.
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AutoIt
Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")
$oHttp.AuthToken = "GMAIL-ACCESS-TOKEN"

Local $sUserId = "me"
$oHttp.SetUrlVar("userId",$sUserId)

Local $sQuery = "subject:questions"
$oHttp.SetUrlVar("query",$sQuery)

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

$oSb = ObjCreate("Chilkat.StringBuilder")
$bSuccess = $oHttp.QuickGetSb($sUrl,$oSb)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.LoadSb($oSb)
$oJson.EmitCompact = False
ConsoleWrite($oJson.Emit() & @CRLF)

If ($oHttp.LastStatus <> 200) Then
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

; 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.

$oJson2 = ObjCreate("Chilkat.JsonObject")

Local $i = 0
Local $iNumMessages = $oJson.SizeOfArray("messages")
While ($i < $iNumMessages)
    $oJson.I = $i
Local $sId = $oJson.StringOf("messages[i].id")
    $oJson2.I = $i
    $oJson2.UpdateString("ids[i]",$sId)
    $i = $i + 1
Wend

; 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"
Local $sLabelId = "Label_43"
$oJson2.UpdateString("addLabelIds[0]",$sLabelId)
$oJson2.UpdateNewArray("removeLabelIds")

$oJson2.EmitCompact = False
ConsoleWrite($oJson2.Emit() & @CRLF)

; Send the batchModify
$sUrl = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/batchModify"
$oResp = ObjCreate("Chilkat.HttpResponse")
$bSuccess = $oHttp.HttpJson("POST",$sUrl,$oJson2,"application/json",$oResp)
If ($bSuccess = False) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("status = " & $oResp.StatusCode & @CRLF)

; A 204 response status indicate success.
If ($oResp.StatusCode <> 204) Then
    ConsoleWrite($oResp.BodyStr & @CRLF)
    ConsoleWrite("Failed." & @CRLF)
    Exit
EndIf

; The 204 response has an empty response body..

ConsoleWrite("BatchModify success!" & @CRLF)