CreateAgGridDataSource: () ->
        return (
          getRows: (params) =>
            rowsThisPage = []
            startRow = params.request.startRow
            endRow = params.request.endRow

            # if we are sorting and/or filtering...
            if @gridSortChanged or @gridFilterChanged
              if @gridOptions.api.getSortModel()? and @gridOptions.api.getSortModel()[0]?
                @gridSortColumn = @gridOptions.api.getSortModel()[0].colId

                #if ascending sort
                if @gridOptions.api.getSortModel()[0].sort == 'asc'
                  @gridSortType = @gridSortColumn + "-ascending"
                #if descending sort
                else if @gridOptions.api.getSortModel()[0].sort == 'desc'
                  @gridSortType = @gridSortColumn + "-descending"

              @gridSortBy(@gridSortColumn, @gridSortType, @advanceFilters).then(() =>
                rowsThisPage = @works.slice(startRow, endRow)

                finalRow = -1
                if endRow >= @works.length
                  finalRow = @works.length

                @gridSortChanged = false
                @gridFilterChanged = false
                @gridSortColumn = ''
                @gridSortType = ''

                setTimeout(()=>
                  params.successCallback(rowsThisPage, finalRow)
                , 0)
              )
            else

              # find out if the user clicked a group to expand
              groupKeys = params.request.groupKeys

              # if the user did not expand a group...
              if groupKeys.length == 0
                rowsThisPage = @works.slice(startRow, endRow)
                @gridLoadMore(@advanceFilters).then(() =>
                  finalRow = -1
                  if endRow >= @works.length
                    finalRow = @works.length

                  setTimeout(()=>
                    params.successCallback(rowsThisPage, finalRow)
                  , 0)
                )
              # the user has expanded a group, so check that we have parent node data...
              else if params.parentNode? and params.parentNode.data?
                parentId = params.parentNode.data.id

                # populate child list in parent node's row group
                @gridLoadChildren(parentId).then((res) =>
                  setTimeout(()=>
                    params.successCallback(@childWorks, @childWorks.length)
                  ,0)
                )
        )

      onGridReady: (event) ->
        initialRowRenderLimit = Math.floor(@viewportHeight / @gridRowRenderDivisor)

        @gridFetchInventory(initialRowRenderLimit).then(() =>
          @gridDatasource = @CreateAgGridDataSource()
          @gridOptions.api.setServerSideDatasource(@gridDatasource)
          @gridLoadMore().then()
        )