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add some Extensions Methods for XQuery Pages Counting ...

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saherelm
2025-11-04 18:10:53 +03:30
parent 4a64a13630
commit 0415364fea
1 changed files with 244 additions and 136 deletions
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Extensions/IQueryableExtensions.cs
+152 -44
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@@ -6,12 +6,16 @@ using System.Reflection;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using xCommons.Extensions;
using xDataService.Configuration;
using xDataService.Constants;
using xExceptions.Constants;
using xModels.Base;
using xModels.Dtos;
namespace xDataService.Extensions {
public static class IQueryableExtensions {
namespace xDataService.Extensions
{
public static class IQueryableExtensions
{
/// <summary>
/// Apply Search Filter on a Query
/// </summary>
@@ -23,7 +27,8 @@ namespace xDataService.Extensions {
this IQueryable<T> source,
string filter
)
where T : XBaseEntity<TKey> {
where T : XBaseEntity<TKey>
{
//
// Apply Filter ...
return source.Where(r => r.PropValuesContains(filter));
@@ -40,7 +45,8 @@ namespace xDataService.Extensions {
this IQueryable<T> source,
string filter
)
where T : XBaseEntity<TKey> {
where T : XBaseEntity<TKey>
{
//
// Where Clause ...
Expression<Func<T, bool>> whereClause = r => r
@@ -58,10 +64,12 @@ namespace xDataService.Extensions {
//
var result = new List<T>();
await
foreach (var entity in enumerator) {
foreach (var entity in enumerator)
{
//
var isApproved = whereFunc(entity);
if (isApproved) {
if (isApproved)
{
result.Add(entity);
}
}
@@ -81,7 +89,8 @@ namespace xDataService.Extensions {
this IEnumerable<T> source,
string filter
)
where T : XBaseEntity<TKey> {
where T : XBaseEntity<TKey>
{
//
// Where Clause ...
Expression<Func<T, bool>> whereClause = r => r
@@ -100,10 +109,12 @@ namespace xDataService.Extensions {
//
var result = new List<T>();
await
foreach (var entity in enumerator) {
foreach (var entity in enumerator)
{
//
var isApproved = whereFunc(entity);
if (isApproved) {
if (isApproved)
{
result.Add(entity);
}
}
@@ -124,7 +135,8 @@ namespace xDataService.Extensions {
this IEnumerable<T> source,
string filter
)
where T : class {
where T : class
{
//
// Apply Filter ...
return source.Where(r => r.PropValuesContains(filter));
@@ -140,14 +152,16 @@ namespace xDataService.Extensions {
public static IOrderedQueryable<TSource> OrderBy<TSource>(
this IQueryable<TSource> query,
string propertyName
) {
)
{
//
var entityType = typeof(TSource);
//
// Create x => x.PropName
var propertyInfo = entityType.GetProperty(propertyName);
if (propertyInfo.IsNull ()) {
if (propertyInfo.IsNull())
{
XException.InvalidArgs.Throw();
}
@@ -161,7 +175,8 @@ namespace xDataService.Extensions {
var enumarableType = typeof(System.Linq.Queryable);
var method = enumarableType.GetMethods()
.Where(m => m.Name == "OrderBy" && m.IsGenericMethodDefinition)
.Where (m => {
.Where(m =>
{
//
var parameters = m.GetParameters().ToList();
@@ -198,11 +213,13 @@ namespace xDataService.Extensions {
public static IOrderedEnumerable<TSource> OrderBy<TSource>(
this IEnumerable<TSource> query,
string propertyName
) {
)
{
//
var entityType = typeof(TSource);
var propertyInfo = entityType.GetProperty(propertyName);
if (propertyInfo.IsNull ()) {
if (propertyInfo.IsNull())
{
XException.InvalidArgs.Throw();
}
@@ -220,14 +237,16 @@ namespace xDataService.Extensions {
public static IOrderedQueryable<TSource> OrderByDescending<TSource>(
this IQueryable<TSource> query,
string propertyName
) {
)
{
//
var entityType = typeof(TSource);
//
// Create x => x.PropName
var propertyInfo = entityType.GetProperty(propertyName);
if (propertyInfo.IsNull ()) {
if (propertyInfo.IsNull())
{
XException.InvalidArgs.Throw();
}
@@ -241,7 +260,8 @@ namespace xDataService.Extensions {
var enumarableType = typeof(System.Linq.Queryable);
var method = enumarableType.GetMethods()
.Where(m => m.Name == "OrderByDescending" && m.IsGenericMethodDefinition)
.Where (m => {
.Where(m =>
{
//
var parameters = m.GetParameters().ToList();
@@ -278,11 +298,13 @@ namespace xDataService.Extensions {
public static IOrderedEnumerable<TSource> OrderByDescending<TSource>(
this IEnumerable<TSource> query,
string propertyName
) {
)
{
//
var entityType = typeof(TSource);
var propertyInfo = entityType.GetProperty(propertyName);
if (propertyInfo.IsNull ()) {
if (propertyInfo.IsNull())
{
XException.InvalidArgs.Throw();
}
@@ -305,15 +327,18 @@ namespace xDataService.Extensions {
bool isAscending,
IDictionary<string, Expression<Func<T, object>>> columnsMap = null
)
where T : XBaseEntity<TKey> {
where T : XBaseEntity<TKey>
{
//
if (columnsMap == null) {
if (columnsMap == null)
{
//
columnsMap = source.FirstOrDefault()
.GetDefaultColumnsMap();
//
if (columnsMap == null) {
if (columnsMap == null)
{
return source;
}
}
@@ -323,15 +348,19 @@ namespace xDataService.Extensions {
var sortByItem = columnsMap.Keys
.FirstOrDefault(p =>
p.ToNormalString() == sortBy.ToNormalString());
if (sortByItem.IsNullOrEmpty ()) {
if (sortByItem.IsNullOrEmpty())
{
return source;
}
//
// Apply Sorting ...
if (isAscending) {
if (isAscending)
{
return source.OrderBy(sortByItem);
} else {
}
else
{
return source.OrderByDescending(sortByItem);
}
}
@@ -351,15 +380,18 @@ namespace xDataService.Extensions {
bool isAscending,
IDictionary<string, Expression<Func<T, object>>> columnsMap = null
)
where T : XBaseEntity<TKey> {
where T : XBaseEntity<TKey>
{
//
if (columnsMap == null) {
if (columnsMap == null)
{
//
columnsMap = source.FirstOrDefault()
.GetDefaultColumnsMap();
//
if (columnsMap == null) {
if (columnsMap == null)
{
return source;
}
}
@@ -369,15 +401,19 @@ namespace xDataService.Extensions {
var sortByItem = columnsMap.Keys
.FirstOrDefault(p =>
p.ToNormalString() == sortBy.ToNormalString());
if (sortByItem.IsNullOrEmpty ()) {
if (sortByItem.IsNullOrEmpty())
{
return source;
}
//
// Apply Sorting ...
if (isAscending) {
if (isAscending)
{
return source.OrderBy(sortByItem);
} else {
}
else
{
return source.OrderByDescending(sortByItem);
}
}
@@ -397,15 +433,18 @@ namespace xDataService.Extensions {
bool isAscending,
IDictionary<string, Expression<Func<T, object>>> columnsMap = null
)
where T : class {
where T : class
{
//
if (columnsMap == null) {
if (columnsMap == null)
{
//
columnsMap = source.FirstOrDefault()
.GetDefaultColumnsMap();
//
if (columnsMap == null) {
if (columnsMap == null)
{
return source;
}
}
@@ -415,15 +454,19 @@ namespace xDataService.Extensions {
var sortByItem = columnsMap.Keys
.FirstOrDefault(p =>
p.ToNormalString() == sortBy.ToNormalString());
if (sortByItem.IsNullOrEmpty ()) {
if (sortByItem.IsNullOrEmpty())
{
return source;
}
//
// Apply Sorting ...
if (isAscending) {
if (isAscending)
{
return source.OrderBy(sortByItem);
} else {
}
else
{
return source.OrderByDescending(sortByItem);
}
}
@@ -440,17 +483,20 @@ namespace xDataService.Extensions {
this IQueryable<T> source,
int? page,
int? pageSize
) {
)
{
//
if (!page.HasValue ||
page <= 0) {
page <= 0)
{
page = 1;
}
//
if (!pageSize.HasValue ||
pageSize <= 0 ||
pageSize > XDataServiceConstants.MAX_AVAILABLE_PAGE_SIZE) {
pageSize > XDataServiceConstants.MAX_AVAILABLE_PAGE_SIZE)
{
pageSize = XDataServiceConstants.DEFAULT_PAGE_SIZE;
}
@@ -476,17 +522,20 @@ namespace xDataService.Extensions {
this IEnumerable<T> source,
int? page,
int? pageSize
) {
)
{
//
if (!page.HasValue ||
page <= 0) {
page <= 0)
{
page = 1;
}
//
if (!pageSize.HasValue ||
pageSize <= 0 ||
pageSize > XDataServiceConstants.MAX_AVAILABLE_PAGE_SIZE) {
pageSize > XDataServiceConstants.MAX_AVAILABLE_PAGE_SIZE)
{
pageSize = XDataServiceConstants.DEFAULT_PAGE_SIZE;
}
@@ -499,5 +548,64 @@ namespace xDataService.Extensions {
.Skip((pageVal - 1) * pageSizeVal)
.Take(pageSizeVal);
}
/// <summary>
/// Count Query Pages based on Specified Total Number ...
/// </summary>
/// <param name="source"></param>
/// <param name="totalItems"></param>
/// <returns></returns>
public static int CountPages(this XQuery source, int totalItems)
{
//
int result = 0;
//
// Validate and Calculate ...
if (!source.IsNull() && source.PageSize > 0 && totalItems > 0)
{
//
result = totalItems / source.PageSize;
if (totalItems % source.PageSize > 0)
{
result++;
}
}
//
return result;
}
/// <summary>
/// Normalize an XQuery based on Data Service Configurations ...
/// </summary>
/// <param name="source"></param>
/// <param name="configuration"></param>
/// <returns></returns>
public static XQuery NormalizeQuery(
this XQuery source,
XDataServiceConfiguration configuration //
)
{
//
if (source.IsNull())
{
source = new XQuery();
}
//
// Page Size Normalization ...
if (source.PageSize < configuration.PagingConfiguration.MinAvailablePageSize)
{
source.PageSize = configuration.PagingConfiguration.MinAvailablePageSize;
}
if (source.PageSize > configuration.PagingConfiguration.MaxAvailablePageSize)
{
source.PageSize = configuration.PagingConfiguration.MaxAvailablePageSize;
}
//
return source;
}
}
}