Visual FoxPro

Lookup Google Drive Folder ID Given a Folder Path

See more Google Drive Examples

Demonstrates how to find the Google Drive folder ID given a Folder Path.

This example demonstrates that we cannot simply query by folder name. (We can if every folder name is unique, but if not...) For example, imagine we have the following directory structure on Google Drive:

/AAWorkArea
/AAWorkArea/FolderA
/AAWorkArea/FolderB
/Folder2
/Folder2/FolderA

There are two directories named "FolderA". One is contained within AAWorkArea, and one is contained within "Folder2". To say it differently: One has the parent "AAWorkArea" and the other's parent is "Folder2".

To find the id of "/AAWorkArea/FolderA", we need to first find the id for "AAWorkArea", and then find the id for the folder with name="FolderA" and with AAWorkArea's id in FolderA's parents.

Visual FoxPro

LOCAL lnSuccess
LOCAL loGAuth
LOCAL loRest
LOCAL lnBAutoReconnect
LOCAL loJson
LOCAL lcJsonResponse
LOCAL loSbQuery

lnSuccess = 0

lnSuccess = 1

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

* This example uses a previously obtained access token having permission for the 
* Google Drive scope.

loGAuth = CreateObject('Chilkat.AuthGoogle')
loGAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN"

loRest = CreateObject('Chilkat.Rest')

* Connect using TLS.
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("www.googleapis.com",443,1,lnBAutoReconnect)

* Provide the authentication credentials (i.e. the access token)
loRest.SetAuthGoogle(loGAuth)

loJson = CreateObject('Chilkat.JsonObject')
loJson.EmitCompact = 0

* Get the AAWorkArea folder that is in the Google Drive root.
loRest.AddQueryParam("q","'root' in parents and name='AAWorkArea'")
lcJsonResponse = loRest.FullRequestNoBody("GET","/drive/v3/files")
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loJson
    CANCEL
ENDIF

loJson.Load(lcJsonResponse)
? loJson.Emit()
? "name: " + loJson.StringOf("files[0].name")
? "id: " + loJson.StringOf("files[0].id")
? "mimeType: " + loJson.StringOf("files[0].mimeType")
? "-"

loRest.ClearAllQueryParams()

* Now that we know the ID for the AAWorkarea directory, get the id for the FolderA having AAWorkArea as the parent.
loSbQuery = CreateObject('Chilkat.StringBuilder')
loSbQuery.Append("name = 'FolderA' and '")
loSbQuery.Append(loJson.StringOf("files[0].id"))
loSbQuery.Append("' in parents")
loRest.AddQueryParamSb("q",loSbQuery)

lcJsonResponse = loRest.FullRequestNoBody("GET","/drive/v3/files")
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loJson
    RELEASE loSbQuery
    CANCEL
ENDIF

loJson.Load(lcJsonResponse)
? loJson.Emit()
? "name: " + loJson.StringOf("files[0].name")
? "id: " + loJson.StringOf("files[0].id")
? "mimeType: " + loJson.StringOf("files[0].mimeType")
? "-"

RELEASE loGAuth
RELEASE loRest
RELEASE loJson
RELEASE loSbQuery