Custom import

Question

HI, I'm newbee in coding In Lightroom, and need to design a custom import to import photo automatic in Lightroom. I has coded a few code below using SDK 3.0. I would like to get help from your guys a fews things:
1) It's the code below is the right way to begin?
2) and I also got the error: the path is invalid, og miss when i calling catalog:addPhoto().
I'm very thankfully for help from you guys.
-- Lightroom API
local catalog = import 'LrApplication'.activeCatalog()
local path  = 'C:\\Users\\dev\\Desktop\\Test\\Picture\\camera.jpg'
local LrFileUtils = import 'LrFileUtils'
local LrPathUtils = import 'LrPathUtils'
local LrTask =  import 'LrTasks'
-- Add photo to catalog
catalog:withWriteAccessDo("writeAccess", function(context)
        --syncablePhotos = catalog:getAllPhotos()
        local lrphoto = catalog.addPhoto(path)
end)
-- Code below is just for Test
local LrDialogs = import 'LrDialogs'
MyHWExportItem = {}
function MyHWExportItem.showModalDialog()
    -- body of funtion
    --LrDialogs.message( "ExportMenuItem Selected", "Hello plugins!", "info" )
    if LrPathUtils.leafName(path) then
        local l = LrPathUtils.leafName( path)
        LrDialogs.message("ExportMenuItem Selected", l, "AtutoImportExport")
    else
        LrDialogs.message("ExportMenuItem Selected", "file not found ", "AtutoImportExport")
    end
end
MyHWExportItem.showModalDialog()

Answer 1

Hi Matt, I'm so happy for your help, thanks a lot, and as you said, and the error is now gone, yeahh!!.   But a new error appear right after that, what is wrong?
Here is my code so far:
-- Lightroom API
--local LrFolfder = import 'LrFolder' -- Creating an folder object
local catalog = import 'LrApplication'.activeCatalog()
local path  = 'C:\\Users\\dev\\Desktop\\Test\\Picture\\camera.jpg'
local LrFileUtils = import 'LrFileUtils'
local LrPathUtils = import 'LrPathUtils'
local LrTasks =  import 'LrTasks'
local LrDialogs = import 'LrDialogs'
-- Export to a folder
-- Code below is just for Test
AddPhoto = {}
function AddPhoto.showModalDialog()
    -- body of funtion
    --LrDialogs.message( "ExportMenuItem Selected", "Hello plugins!", "info" )
    -- logger:trace( "updateStatus() is executing." )
    LrTasks.startAsyncTask( function()
        --Add photo to catalog
            catalog:withWriteAccessDo("writeAccess", function(context)
                --local syncablePhotos = catalog:getAllPhotos()
                local lrphoto = catalog:addPhoto(path){}
                --local folders = catalog:getFolders()
        end)
    end)
    if LrPathUtils.leafName(path) then
         local l = LrPathUtils.leafName( path)
         LrDialogs.message("ExportMenuItem Selected", l, "AtutoImportExport")
     else
         LrDialogs.message("ExportMenuItem Selected", "file not found ", "AtutoImportExport")
    end
end
AddPhoto.showModalDialog()