116 lines
2.4 KiB
C#
116 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace zero.Core.Entities
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{
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/// <summary>
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/// Represents a paged result for a model collection
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/// </summary>
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public class ListResult<T> : ListResult
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{
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public ListResult(long totalItems, long page, long pageSize)
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{
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TotalItems = totalItems;
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Page = page;
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PageSize = pageSize;
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if (pageSize > 0)
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{
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TotalPages = (long)Math.Ceiling(totalItems / (decimal)pageSize);
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}
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else
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{
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TotalPages = 1;
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}
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HasMore = TotalPages > Page;
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}
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public ListResult(IList<T> items, long totalItems, long pageNumber, long pageSize) : this(totalItems, pageNumber, pageSize)
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{
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Items = items;
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}
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public ListResult<TTarget> MapTo<TTarget>(Func<T, TTarget> convertItem)
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{
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return new ListResult<TTarget>(Items.Select(x => convertItem(x)).Where(x => x != null).ToList(), TotalItems, Page, PageSize)
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{
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Statistics = Statistics
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};
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}
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public IList<T> Items { get; set; }
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/// <summary>
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/// Calculates the skip size based on the paged parameters specified
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/// </summary>
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/// <remarks>
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/// Returns 0 if the page number or page size is zero
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/// </remarks>
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public int GetSkipSize()
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{
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if (Page > 0 && PageSize > 0)
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{
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return Convert.ToInt32((Page - 1) * PageSize);
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}
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return 0;
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}
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/// <summary>
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/// Adds a statistic value
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/// </summary>
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public ListResult<T> AddStatistic(string key, object value, StatisticDisplay display = StatisticDisplay.Default)
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{
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Statistics.Add(new PagedResultStatistic()
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{
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Key = key,
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Value = value,
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Display = display
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});
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return this;
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}
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}
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public class ListResult
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{
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public long Page { get; protected set; }
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public long PageSize { get; protected set; }
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public long TotalPages { get; protected set; }
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public long TotalItems { get; protected set; }
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public bool HasMore { get; protected set; }
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public List<PagedResultStatistic> Statistics { get; set; } = new List<PagedResultStatistic>();
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}
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public class PagedResultStatistic
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{
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public string Key { get; set; }
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public object Value { get; set; }
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public StatisticDisplay Display { get; set; }
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}
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public enum StatisticDisplay
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{
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Default,
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Currency
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}
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public enum Direction
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{
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Ascending = 0,
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Descending = 1
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}
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}
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