PowerBuilder GMail: Parse GMail REST API Error Response

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Gets the current user's Gmail profile, but shows an error response and how to parse it..

Documentation: https://developers.google.com/gmail/api/v1/reference/users/getProfile

integer li_rc
oleobject loo_Rest
integer li_Success
oleobject loo_Oauth2
oleobject loo_SbJson
oleobject loo_Json
integer li_ErrorCode
string ls_ErrorMessage
integer i
integer li_Count_i
string ls_Domain
string ls_Reason
string ls_Message
string ls_ExtendedHelp

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//   Provide a previously obtained OAuth2 access token.
loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat_9_5_0.OAuth2")

loo_Oauth2.AccessToken = "OAUTH2_ACCESS_TOKEN"
loo_Rest.SetAuthOAuth2(loo_Oauth2)

li_Success = loo_Rest.Connect("www.googleapis.com",443,1,1)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Oauth2
    return
end if

loo_Rest.AddPathParam("userId","matt@chilkat.io")

loo_SbJson = create oleobject
li_rc = loo_SbJson.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

li_Success = loo_Rest.FullRequestNoBodySb("GET","/gmail/v1/users/userId/profile",loo_SbJson)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Oauth2
    destroy loo_SbJson
    return
end if

if loo_Rest.ResponseStatusCode <> 200 then
    Write-Debug "Received error response code: " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "Response body:"
    Write-Debug loo_SbJson.GetAsString()
    destroy loo_Rest
    destroy loo_Oauth2
    destroy loo_SbJson
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.LoadSb(loo_SbJson)

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

li_ErrorCode = loo_Json.IntOf("error.code")
ls_ErrorMessage = loo_Json.StringOf("error.message")
i = 0
li_Count_i = loo_Json.SizeOfArray("error.errors")
do while i < li_Count_i
    loo_Json.I = i
    ls_Domain = loo_Json.StringOf("error.errors[i].domain")
    ls_Reason = loo_Json.StringOf("error.errors[i].reason")
    ls_Message = loo_Json.StringOf("error.errors[i].message")
    ls_ExtendedHelp = loo_Json.StringOf("error.errors[i].extendedHelp")
    i = i + 1
loop

Write-Debug "Example Completed."


destroy loo_Rest
destroy loo_Oauth2
destroy loo_SbJson
destroy loo_Json

Sample JSON Response Body

{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "accessNotConfigured",
    "message": "Access Not Configured. Gmail API has not been used in project 377697329735 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/gmail.googleapis.com/overview?project=377697329735 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.",
    "extendedHelp": "https://console.developers.google.com/apis/api/gmail.googleapis.com/overview?project=377697329735"
   }
  ],
  "code": 403,
  "message": "Access Not Configured. Gmail API has not been used in project 377697329735 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/gmail.googleapis.com/overview?project=377697329735 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry."
 }
}