(Visual FoxPro) Outlook -- Create Map of Folder Paths to IDs

Recursively descends folders and creates a hashtable of folder paths to IDs. This can be done once at the start of your program (or even less if the map is persisted to a file or database).

The reason this is necessary is because folder ID's need to be passed to the Outlook API, and an application will typically be working with folder paths.

Note: This example requires Chilkat v9.5.0.67 or greater.

This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loHttp
LOCAL loFolderMap
LOCAL loSbResponse
LOCAL lnSuccess
LOCAL loJson
LOCAL loIdQueue
LOCAL loSbFolderPath
LOCAL loSbQueueEntry
LOCAL lcFolderName
LOCAL lcFolderPath
LOCAL lcFolderId
LOCAL i
LOCAL lnNumFolders
LOCAL lcParentFolderPath
LOCAL lcParentFolderId
LOCAL loSbFolderMapXml
LOCAL loHt2
LOCAL loSb2

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* Our folder path --> ID map will be stored in this hash table.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Hashtable')
loFolderMap = CreateObject('Chilkat.Hashtable')

* Use your previously obtained access token here:
* See the following examples for getting an access token:
*    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
*    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
*    Refresh Access Token (Azure AD v2.0 Endpoint).
*    Refresh Access Token (Azure AD Endpoint).

loHttp.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbResponse = CreateObject('Chilkat.StringBuilder')

* Begin by getting the top-level folders.
loHttp.ClearUrlVars()
loHttp.SetUrlVar("userPrincipalName","chilkatsoft@outlook.com")
lnSuccess = loHttp.QuickGetSb("https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/mailFolders",loSbResponse)
IF ((lnSuccess <> 1) AND (loHttp.LastStatus = 0)) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loFolderMap
    RELEASE loSbResponse
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.LoadSb(loSbResponse)
loJson.EmitCompact = 0

? "Status code = " + STR(loHttp.LastStatus)
IF (loHttp.LastStatus <> 200) THEN
    ? loJson.Emit()
    ? "Failed."
ENDIF

* This is our queue/stack of unprocessed folder ID's
* The recursive nature of this example is that we get the 
* child folders for each folder ID in the idQueue, which may
* cause additional ID's to be added.  We continue  until the idQueue
* is empty.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringArray')
loIdQueue = CreateObject('Chilkat.StringArray')

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbFolderPath = CreateObject('Chilkat.StringBuilder')
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbQueueEntry = CreateObject('Chilkat.StringBuilder')

* Prime the map and idQueue with the top-level folders.
i = 0
lnNumFolders = loJson.SizeOfArray("value")
DO WHILE i < lnNumFolders
    loJson.I = i
    lcFolderName = loJson.StringOf("value[i].displayName")
    lcFolderId = loJson.StringOf("value[i].id")
    loSbFolderPath.SetString("/")
    loSbFolderPath.Append(lcFolderName)
    lcFolderPath = loSbFolderPath.GetAsString()
    loFolderMap.AddStr(lcFolderPath,lcFolderId)
    ? lcFolderPath + " --> " + lcFolderId

    * Push the folder path + id onto the idQueue.
    loSbQueueEntry.Clear()
    loSbQueueEntry.SetNth(0,lcFolderPath,"|",0,0)
    loSbQueueEntry.SetNth(1,lcFolderId,"|",0,0)
    loIdQueue.Append(loSbQueueEntry.GetAsString())
    i = i + 1
ENDDO

* Initial output:
* /Archive --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAG8XunwAAAA=
* /Deleted Items --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEKAAAA
* /Drafts --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA
* /Inbox --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA
* /Junk Email --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEiAAAA
* /Outbox --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgELAAAA
* /Sent Items --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEJAAAA
* 

* Process the idQueue until it becomes empty.  This is the recursive loop.

DO WHILE loIdQueue.Length > 0
    loSbQueueEntry.SetString(loIdQueue.GetString(0))
    loIdQueue.RemoveAt(0)

    lcParentFolderPath = loSbQueueEntry.GetNth(0,"|",0,0)
    lcParentFolderId = loSbQueueEntry.GetNth(1,"|",0,0)

    loHttp.SetUrlVar("id",lcParentFolderId)
    lnSuccess = loHttp.QuickGetSb("https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/mailFolders/{$id}/childFolders",loSbResponse)
    IF ((lnSuccess <> 1) AND (loHttp.LastStatus = 0)) THEN
        ? loHttp.LastErrorText
        RELEASE loHttp
        RELEASE loFolderMap
        RELEASE loSbResponse
        RELEASE loJson
        RELEASE loIdQueue
        RELEASE loSbFolderPath
        RELEASE loSbQueueEntry
        CANCEL
    ENDIF

    loJson.LoadSb(loSbResponse)
    IF (loHttp.LastStatus <> 200) THEN
        ? "Status code = " + STR(loHttp.LastStatus)
        ? loJson.Emit()
        ? "Failed."
    ENDIF

    i = 0
    lnNumFolders = loJson.SizeOfArray("value")
    DO WHILE i < lnNumFolders
        loJson.I = i
        lcFolderName = loJson.StringOf("value[i].displayName")
        lcFolderId = loJson.StringOf("value[i].id")
        loSbFolderPath.SetString(lcParentFolderPath)
        loSbFolderPath.Append("/")
        loSbFolderPath.Append(lcFolderName)
        lcFolderPath = loSbFolderPath.GetAsString()
        loFolderMap.AddStr(lcFolderPath,lcFolderId)
        ? lcFolderPath + " --> " + lcFolderId

        * Push the folder path + id onto the idQueue.
        loSbQueueEntry.Clear()
        loSbQueueEntry.SetNth(0,lcFolderPath,"|",0,0)
        loSbQueueEntry.SetNth(1,lcFolderId,"|",0,0)
        loIdQueue.Append(loSbQueueEntry.GetAsString())
        i = i + 1
    ENDDO

ENDDO

* The hash table of mail folder paths --> ID's can be persisted to XML and saved to a file or database (or anywhere..)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbFolderMapXml = CreateObject('Chilkat.StringBuilder')
loFolderMap.ToXmlSb(loSbFolderMapXml)
loSbFolderMapXml.WriteFile("qa_data/outlook/folderMap.xml","utf-8",0)

* The hash table can be restored from the serialized XML like this:
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Hashtable')
loHt2 = CreateObject('Chilkat.Hashtable')
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSb2 = CreateObject('Chilkat.StringBuilder')
loSb2.LoadFile("qa_data/outlook/folderMap.xml","utf-8")
loHt2.AddFromXmlSb(loSb2)

* What's the ID for the folder "/Inbox/abc/subFolderA" ?
? "id for /Inbox/abc/subFolderA = " + loHt2.LookupStr("/Inbox/abc/subFolderA")

* Final output:

* /Archive --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAG8XunwAAAA=
* /Deleted Items --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEKAAAA
* /Drafts --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEPAAAA
* /Inbox --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA
* /Junk Email --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEiAAAA
* /Outbox --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgELAAAA
* /Sent Items --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEJAAAA
* /Inbox/abc --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA=
* /Inbox/xyz --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huwEAAAA=
* /Inbox/abc/subFolderA --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huwAAAQ==
* /Inbox/abc/subFolderB --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huwMAAAA=
* /Inbox/abc/subFolderA/a --> AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huwIAAAA=
* 

* ------------------------------------------------------------------------------------------------------
* This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com
* 
* The Microsoft Graph Outlook Mail API lets you read, create, and send messages and attachments, 
* view and respond to event messages, and manage folders that are secured by Azure Active Directory 
* in Office 365. It also provides the same functionality in Microsoft accounts specifically 
* in these domains: Hotmail.com, Live.com, MSN.com, Outlook.com, and Passport.com.

RELEASE loHttp
RELEASE loFolderMap
RELEASE loSbResponse
RELEASE loJson
RELEASE loIdQueue
RELEASE loSbFolderPath
RELEASE loSbQueueEntry
RELEASE loSbFolderMapXml
RELEASE loHt2
RELEASE loSb2