(PureBasic) PayPal Send Invoice

Sends a PayPal invoice to a customer.

See also Send Invoice

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    ; Note: Requires Chilkat v9.5.0.64 or greater.

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

    ; Load our previously obtained access token. (see PayPal OAuth2 Access Token)
    jsonToken.i = CkJsonObject::ckCreate()
    If jsonToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadFile(jsonToken,"qa_data/tokens/paypal.json")

    ; Build the Authorization request header field value.
    sbAuth.i = CkStringBuilder::ckCreate()
    If sbAuth.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; token_type should be "Bearer"
    CkStringBuilder::ckAppend(sbAuth,CkJsonObject::ckStringOf(jsonToken,"token_type"))
    CkStringBuilder::ckAppend(sbAuth," ")
    CkStringBuilder::ckAppend(sbAuth,CkJsonObject::ckStringOf(jsonToken,"access_token"))

    ; Make the initial connection.
    ; A single REST object, once connected, can be used for many PayPal REST API calls.
    ; The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    ; then it will be automatically re-established as needed.
    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    bAutoReconnect.i = 1
    success.i = CkRest::ckConnect(rest,"api.sandbox.paypal.com",443,1,bAutoReconnect)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkJsonObject::ckDispose(jsonToken)
        CkStringBuilder::ckDispose(sbAuth)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ; ----------------------------------------------------------------------------------------------
    ; The code above this comment could be placed inside a function/subroutine within the application
    ; because the connection does not need to be made for every request.  Once the connection is made
    ; the app may send many requests..
    ; ----------------------------------------------------------------------------------------------

    ; Build a path using a draft invoice ID.
    sbPath.i = CkStringBuilder::ckCreate()
    If sbPath.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbPath,"/v1/invoicing/invoices/invoice_id/send")
    numReplacements.i = CkStringBuilder::ckReplace(sbPath,"invoice_id","INV2-QCHR-QHSD-M2VU-AVXC")

    CkRest::ckAddHeader(rest,"Authorization",CkStringBuilder::ckGetAsString(sbAuth))
    CkRest::ckAddQueryParam(rest,"notify_merchant","true")

    responseBody.s = CkRest::ckFullRequestFormUrlEncoded(rest,"POST",CkStringBuilder::ckGetAsString(sbPath))
    If CkRest::ckLastMethodSuccess(rest) <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkJsonObject::ckDispose(jsonToken)
        CkStringBuilder::ckDispose(sbAuth)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbPath)
        ProcedureReturn
    EndIf

    Debug "Response Status Code = " + Str(CkRest::ckResponseStatusCode(rest))

    ; Did we get a 202 accepted response?
    If CkRest::ckResponseStatusCode(rest) <> 202
        Debug responseBody
        Debug "Failed."
        CkJsonObject::ckDispose(jsonToken)
        CkStringBuilder::ckDispose(sbAuth)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbPath)
        ProcedureReturn
    EndIf

    ; If the 202 response is received, the response body would be empty...
    Debug "Success."


    CkJsonObject::ckDispose(jsonToken)
    CkStringBuilder::ckDispose(sbAuth)
    CkRest::ckDispose(rest)
    CkStringBuilder::ckDispose(sbPath)


    ProcedureReturn
EndProcedure