Visual FoxPro
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.
Chilkat Visual FoxPro Downloads

Visual FoxPro
LOCAL lnSuccess
LOCAL loHttp
LOCAL lcUserId
LOCAL lcQuery
LOCAL lcUrl
LOCAL loSb
LOCAL loJson
LOCAL loJson2
LOCAL i
LOCAL lnNumMessages
LOCAL lcId
LOCAL lcLabelId
LOCAL loResp

lnSuccess = 0

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

loHttp = CreateObject('Chilkat.Http')
loHttp.AuthToken = "GMAIL-ACCESS-TOKEN"

lcUserId = "me"
loHttp.SetUrlVar("userId",lcUserId)

lcQuery = "subject:questions"
loHttp.SetUrlVar("query",lcQuery)

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

loSb = CreateObject('Chilkat.StringBuilder')
lnSuccess = loHttp.QuickGetSb(lcUrl,loSb)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loSb
    CANCEL
ENDIF

loJson = CreateObject('Chilkat.JsonObject')
loJson.LoadSb(loSb)
loJson.EmitCompact = 0
? loJson.Emit()

IF (loHttp.LastStatus <> 200) THEN
    ? "Failed."
    RELEASE loHttp
    RELEASE loSb
    RELEASE loJson
    CANCEL
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.

loJson2 = CreateObject('Chilkat.JsonObject')

i = 0
lnNumMessages = loJson.SizeOfArray("messages")
DO WHILE (i < lnNumMessages)
    loJson.I = i
    lcId = loJson.StringOf("messages[i].id")
    loJson2.I = i
    loJson2.UpdateString("ids[i]",lcId)
    i = i + 1
ENDDO

* 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"
lcLabelId = "Label_43"
loJson2.UpdateString("addLabelIds[0]",lcLabelId)
loJson2.UpdateNewArray("removeLabelIds")

loJson2.EmitCompact = 0
? loJson2.Emit()

* Send the batchModify
lcUrl = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/batchModify"
loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpJson("POST",lcUrl,loJson2,"application/json",loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loSb
    RELEASE loJson
    RELEASE loJson2
    RELEASE loResp
    CANCEL
ENDIF

? "status = " + STR(loResp.StatusCode)

* A 204 response status indicate success.
IF (loResp.StatusCode <> 204) THEN
    ? loResp.BodyStr
    ? "Failed."
    RELEASE loHttp
    RELEASE loSb
    RELEASE loJson
    RELEASE loJson2
    RELEASE loResp
    CANCEL
ENDIF

* The 204 response has an empty response body..

? "BatchModify success!"

RELEASE loHttp
RELEASE loSb
RELEASE loJson
RELEASE loJson2
RELEASE loResp