(SQL Server) PayPal - Generate Invoice Number

Generates the next invoice number that is available to the user.

Note: This example requires Chilkat v9.5.0.65 or greater.

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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- Note: Requires Chilkat v9.5.0.65 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)
    DECLARE @jsonToken int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonToken OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @jsonToken, 'LoadFile', @success OUT, 'qa_data/tokens/paypal.json'

    -- Build the Authorization request header field value.
    DECLARE @sbAuth int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbAuth OUT

    -- token_type should be "Bearer"
    EXEC sp_OAMethod @jsonToken, 'StringOf', @sTmp0 OUT, 'token_type'
    EXEC sp_OAMethod @sbAuth, 'Append', @success OUT, @sTmp0
    EXEC sp_OAMethod @sbAuth, 'Append', @success OUT, ' '
    EXEC sp_OAMethod @jsonToken, 'StringOf', @sTmp0 OUT, 'access_token'
    EXEC sp_OAMethod @sbAuth, 'Append', @success OUT, @sTmp0

    -- 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.
    DECLARE @rest int
    -- Use "Chilkat_9_5_0.Rest" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Rest', @rest OUT

    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    DECLARE @success int
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'api.sandbox.paypal.com', 443, 1, @bAutoReconnect
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jsonToken
        EXEC @hr = sp_OADestroy @sbAuth
        EXEC @hr = sp_OADestroy @rest
        RETURN
      END

    -- ----------------------------------------------------------------------------------------------
    -- 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..
    -- ----------------------------------------------------------------------------------------------

    -- Clear the REST object of any headers or query params from previous requests.
    EXEC sp_OAMethod @rest, 'ClearAllHeaders', @success OUT
    EXEC sp_OAMethod @rest, 'ClearAllQueryParams', @success OUT

    EXEC sp_OAMethod @sbAuth, 'GetAsString', @sTmp0 OUT
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'Authorization', @sTmp0

    -- Send the POST request with an emtpy body and get the JSON response.
    DECLARE @sbJsonRequest int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbJsonRequest OUT

    DECLARE @sbJsonResponse int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbJsonResponse OUT

    EXEC sp_OAMethod @rest, 'FullRequestSb', @success OUT, 'POST', '/v1/invoicing/invoices/next-invoice-number', @sbJsonRequest, @sbJsonResponse
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jsonToken
        EXEC @hr = sp_OADestroy @sbAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @sbJsonRequest
        EXEC @hr = sp_OADestroy @sbJsonResponse
        RETURN
      END

    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'LoadSb', @success OUT, @sbJsonResponse


    EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
    PRINT 'Response Status Code = ' + @iTmp0

    -- Did we get a 200 success response?
    EXEC sp_OAGetProperty @rest, 'ResponseStatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN
        EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
        PRINT @sTmp0

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @jsonToken
        EXEC @hr = sp_OADestroy @sbAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @sbJsonRequest
        EXEC @hr = sp_OADestroy @sbJsonResponse
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    -- Sample JSON response is shown below.
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    PRINT '----------------------'

    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'number'
    PRINT 'Next invoice number: ' + @sTmp0

    PRINT 'success'

    -- ------------------------------------------------
    -- A sample JSON response:

    -- 	{ 
    -- 	  "number": "0003"
    -- 	}

    EXEC @hr = sp_OADestroy @jsonToken
    EXEC @hr = sp_OADestroy @sbAuth
    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @sbJsonRequest
    EXEC @hr = sp_OADestroy @sbJsonResponse
    EXEC @hr = sp_OADestroy @json


END
GO