Initial Commit ...

Dtos/XDeviceDto.cs

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+using xCommons.Constants;
+using xModels.Base;
+
+namespace xModels.Dtos {
+    public class XDeviceDto : XBaseDto {
+        /// <summary>
+        /// Operating System
+        /// </summary>
+        /// <value>device operating system identifier</value>
+        public string Os { get; set; }
+        /// <summary>
+        /// Operating System Version
+        /// </summary>
+        /// <value>which version of operatin system is in use</value>
+        public string OsVersion { get; set; }
+        /// <summary>
+        /// Device Browser
+        /// </summary>
+        /// <value>the Browser identifier</value>
+        public string Browser { get; set; }
+        /// <summary>
+        /// Browser Engine Agent
+        /// </summary>
+        /// <value>browser engine Agent</value>
+        public string UserAgent { get; set; }
+        /// <summary>
+        /// Type of client Device
+        /// </summary>
+        /// <value>represent device type <see>XDeviceType</see></value>
+        public XDeviceType DeviceType { get; set; }
+    }
+}

Dtos/XFileDto.cs

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+using System;
+using System.ComponentModel.DataAnnotations;
+using xCommons.Constants;
+using xModels.Base;
+
+namespace xModels.Dtos {
+    public partial class XFileDto : XBaseDto {
+        [Required]
+        public string AuthorId { get; set; }
+
+        public XFileType Type { get; set; }
+
+        [Required]
+        [StringLength (255)]
+        public string Name { get; set; }
+
+        [StringLength (255)]
+        public string Thumb { get; set; }
+
+        [Required]
+        [StringLength (255)]
+        public string Path { get; set; }
+
+        [StringLength (255)]
+        public string ThumbPath { get; set; }
+
+        [Required]
+        public DateTime UploadedOn { get; set; }
+    }
+}

Dtos/XObjectResponseResult.cs

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+namespace xModels.Dtos {
+    /// <summary>
+    /// Some Requests Get Object Response Result of Data ...
+    /// </summary>
+    public struct XObjectResponseResult<T> {
+
+        public XObjectResponseResult (T responseObject, string responseText) {
+            this.Object = responseObject;
+            this.Text = responseText;
+        }
+
+        public T Object { get; }
+
+        public string Text { get; }
+    }
+}

Dtos/XPageRequest.cs

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+namespace xModels.Dtos {
+    /// <summary>
+    /// Request a Page of Data based on Cursor ...
+    /// this only be Used in GraphQL ...
+    /// </summary>
+    public class XPageRequest {
+        public int? First { get; set; }
+        public int? Last { get; set; }
+        public string After { get; set; } = "";
+        public string Before { get; set; } = "";
+        public string SortBy { get; set; } = "";
+        public bool DescendingSort { get; set; }
+    }
+}

Dtos/XPageResponse.cs

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+using System.Collections.Generic;
+
+namespace xModels.Dtos {
+    /// <summary>
+    /// Result of a Requested Page of Data based on Cursor ...
+    /// this only be Used in GraphQL ...
+    /// </summary>
+    /// <typeparam name="T"></typeparam>    
+    public class XPageResponse<T> {
+        public List<T> Nodes { get; set; }
+        public int TotalCount { get; set; }
+        public bool HasNextPage { get; set; }
+        public bool HasPreviousPage { get; set; }
+    }
+
+}

Dtos/XQuery.cs

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+using xModels.Base;
+
+namespace xModels.Dtos {
+    /// <summary>
+    /// Request a Page of Data Based on Query ...
+    /// this can used in every Data Providers ...
+    /// </summary>
+    public class XQuery : XBaseDto {
+        /// <summary>
+        /// an string for filtering results
+        /// </summary>
+        /// <value></value>
+        public string Filter { get; set; } = null;
+
+        /// <summary>
+        /// determines fully load object with it's relational fields or not
+        /// </summary>
+        /// <value></value>
+        public bool ContainsDetail { get; set; } = false;
+
+        /// <summary>
+        /// specifiy sorting of items
+        /// </summary>
+        /// <returns></returns>
+        public string SortBy { get; set; } = nameof (XBaseIntIDEntity.Id);
+
+        /// <summary>
+        /// specify sorting direction
+        /// </summary>
+        /// <value></value>
+        public bool IsAscending { get; set; } = true;
+
+        /// <summary>
+        /// specify page number
+        /// </summary>
+        /// <value></value>
+        public int Page { get; set; } = 1;
+
+        /// <summary>
+        /// specify page size
+        /// </summary>
+        /// <value></value>
+        public int PageSize { get; set; }
+    }
+}

Dtos/XQueryResult.cs

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+using System.Collections.Generic;
+using xModels.Base;
+
+namespace xModels.Dtos {
+    /// <summary>
+    /// Result of a Requested Page of Data Based on Query ...
+    /// this can used in every Data Providers ...
+    /// </summary>
+    public class XQueryResult<T> : XBaseDto {
+        /// <summary>
+        /// a collection of items for a page ...
+        /// </summary>
+        /// <value></value>
+        public IEnumerable<T> Items { get; set; }
+
+        /// <summary>
+        /// Current Page Number ...
+        /// </summary>
+        /// <value></value>
+        public long Page { get; set; }
+
+        /// <summary>
+        /// Current Page Size ...
+        /// </summary>
+        /// <value></value>
+        public long PageSize { get; set; }
+
+        /// <summary>
+        /// Total Pages ...
+        /// </summary>
+        /// <value></value>
+        public long TotalPages { get; set; }
+
+        /// <summary>
+        /// Total Filtered Items ...
+        /// </summary>
+        /// <value></value>
+        public long TotalFilteredItems { get; set; }
+
+        /// <summary>
+        /// Total Exists Items ...
+        /// </summary>
+        /// <value></value>
+        public long TotalItems { get; set; }
+    }
+}

Dtos/XValidateRevisionRequest.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace xModels.Dtos {
+    /// <summary>
+    /// in some cases we have to validate a revision of request, this is a model 
+    /// which used to request a revision validator ...
+    /// </summary>
+    public class XValidateRevisionRequest {
+        [Required]
+        public string Revision { get; set; }
+    }
+}