/// <summary>
/// Build individual page nodes
/// </summary>
public List <Page> BuildPageNodes(int collectionSize, int selectedPageNumber, int itemsPerPage, int numberOfNodesInPaginatedList)
{
var lastPage = _pageInCollectionService.GetLastPageInCollection(collectionSize, itemsPerPage);
// If we have less then numberOfNodesInPaginatedList * itemPage in our collectionSize,
// then we know we have a partial list
if (numberOfNodesInPaginatedList * itemsPerPage > collectionSize)
{
return(BuildPartialList(collectionSize, selectedPageNumber, itemsPerPage));
}
// We are at the first collection of nodes in paginated list: 1, 2 & 3
if (selectedPageNumber < numberOfNodesInPaginatedList - 2)
{
return(BuildStartList(selectedPageNumber));
}
// We are at the last collection of nodes in paginated list : last -2 , last - 1 & last
if (selectedPageNumber > lastPage - (numberOfNodesInPaginatedList - 2))
{
return(BuildEndList(collectionSize, selectedPageNumber, itemsPerPage, numberOfNodesInPaginatedList));
}
// We are at an in between collection of node in paginated list
return(BuildFullList(selectedPageNumber));
}
/// <summary>
/// Builds meta data to be used with PioneerPaginationTagHelper
/// </summary>
/// <param name="collectionSize">Total size of collection we are paginating</param>
/// <param name="selectedPageNumber">Selected page number of pagination</param>
/// <param name="itemsPerPage">How many items per paginated list</param>
public PaginatedMetaModel GetMetaData(int collectionSize, int selectedPageNumber, int itemsPerPage)
{
var lastPage = _pageInCollectionService.GetLastPageInCollection(collectionSize, itemsPerPage);
// Cover > out of range exceptions
if (lastPage < selectedPageNumber)
{
selectedPageNumber = lastPage;
}
// Cover < out of range exceptions
if (selectedPageNumber < 1)
{
selectedPageNumber = 1;
}
if (collectionSize == 0)
{
return(GetCollectionSizeZeroModel());
}
_pages = _nodeService.BuildPageNodes(collectionSize, selectedPageNumber, itemsPerPage, NumberOfNodesInPaginatedList);
return(new PaginatedMetaModel
{
PreviousPage = _previousPageService.BuildPreviousPage(_pages, collectionSize, selectedPageNumber, itemsPerPage),
Pages = _pages,
NextPage = _nextPageService.BuildNextPage(
_pages,
collectionSize,
selectedPageNumber,
itemsPerPage,
NumberOfNodesInPaginatedList
)
});
}
/// <summary>
/// Determine if we need a Next Page
/// </summary>
private bool DisplayNextPage(int collectionSize, int selectedPageNumber, int itemsPerPage)
{
return(selectedPageNumber < _pageInCollectionService.GetLastPageInCollection(collectionSize, itemsPerPage));
}
