last ...

Extensions/XAiModelsExtensions.cs

@@ -191,6 +191,67 @@ namespace xAiModels.Extensions
             return result;
         }
 
+        /// <summary>
+        /// Validate a File Extraction Result ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <returns></returns>
+        public static bool IsValid(this XFileExtractionResult source)
+        {
+            //
+            var result =
+                !source.IsNullOrDefault() &&
+                (
+                    source.Images.HasChild() ||
+                    !source.Text.IsNullOrEmpty() ||
+                    !source.AudioTranscript.IsNullOrEmpty()
+                );
+            return result;
+        }
+
+        /// <summary>
+        /// Converts a File Extraction Result to AI Contents ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <returns></returns>
+        public static IList<AIContent> ToAIContents(this XFileExtractionResult source)
+        {
+            //
+            var result = new List<AIContent>();
+
+            //
+            if (source.IsValid())
+            {
+                //
+                // Main Text ...
+                if (!source.Text.IsNullOrEmpty())
+                {
+                    result.Add(new TextContent(source.Text));
+                }
+
+                //
+                // Images ...
+                if (source.Images.HasChild())
+                {
+                    //
+                    foreach (var img in source.Images)
+                    {
+                        result.Add(new DataContent(img.Bytes, img.MimeType));
+                    }
+                }
+
+                //
+                // Transcripted Audio ...
+                if (!source.AudioTranscript.IsNullOrEmpty())
+                {
+                    result.Add(new TextContent($"[Audio Transcript]\n{source.AudioTranscript}"));
+                }
+            }
+
+            //
+            return result;
+        }
+
         /// <summary>
         /// Check a Collection Contains Default Project for Specified Owner or not ...
         /// </summary>
@@ -352,22 +413,42 @@ namespace xAiModels.Extensions
             return result;
         }
 
+        /// <summary>
+        /// Converts a Message Dto to ChatMessage ...
+        /// </summary>
+        /// <param name="source"></param>
+        /// <param name="additionalContents"></param>
+        /// <returns></returns>
         public static ChatMessage ToChatMessages(
-            this XAiMessageDto source
+            this XAiMessageDto source,
+             IList<AIContent> additionalContents = null
         )
         {
-            //
-            // TODO: Handle Files Attached here ...
-
             //
             ChatMessage result = null;
 
             //
             if (!source.IsNullOrDefault())
             {
+                //
+                var contents = new List<AIContent>
+                {
+                    //
+                    // Add Source Content ...
+                    new TextContent(source.Content)
+                };
+
+                //
+                // Add Additional Content ...
+                if (additionalContents.HasChild())
+                {
+                    contents.AddRange(additionalContents);
+                }
+
                 //
                 result = new ChatMessage
                 {
+                    Contents = contents,
                     AuthorName =
                     source.Role == XAiChatRole.User &&
                     !source.Owner.IsNullOrDefault()
@@ -375,7 +456,6 @@ namespace xAiModels.Extensions
                         : string.Empty,
                     Role = source.Role.ToChatRole(),
                     MessageId = source.Id.ToString(),
-                    Contents = [new TextContent(source.Content)]
                 };
             }
 

Interfaces/IXAiDataProvider.cs

@@ -1,4 +1,5 @@
 using System;
+using xModels.Dtos;
 using System.Threading;
 using xAiModels.Models.Dtos;
 using System.Threading.Tasks;
@@ -251,5 +252,51 @@ namespace xAiModels.Interfaces
             CancellationToken cancellationToken = default
         );
         #endregion    
+
+        //
+        #region Query ...
+        /// <summary>
+        /// Query Projects ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XAiProjectDto>> QueryProjects(
+            string ownerId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Query Conversations ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="projectId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XAiConversationDto>> QueryConversations(
+            string ownerId,
+            Guid projectId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        );
+
+        /// <summary>
+        /// Query Messages ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="conversationId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        Task<XQueryResult<XAiMessageDto>> QueryMessages(
+            string ownerId,
+            Guid conversationId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        );
+        #endregion
     }
 }

Models/XFileExtractionResult.cs

@@ -0,0 +1,71 @@
+using System.Collections.Generic;
+
+namespace xAiModels.Models
+{
+    /// <summary>
+    /// Holds File Extraction Result ...
+    /// </summary>    
+    public class XFileExtractionResult
+    {
+        /// <summary>
+        /// Extracted String Content ...
+        /// </summary>
+        public string Text { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Extracted Images for Vision Model ...
+        /// </summary>
+        public IList<XExtractedImage> Images { get; set; } = [];
+
+        /// <summary>
+        /// Extracted Content from Audio File ...
+        /// </summary>
+        public string AudioTranscript { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Main File Name ...
+        /// </summary>
+        public string FileName { get; set; }
+
+        /// <summary>
+        /// Main File MIME Type ...
+        /// </summary>
+        public string MimeType { get; set; }
+
+        /// <summary>
+        /// Specified Fallback done using Images or not ...
+        /// </summary>
+        public bool UsedImageFallback { get; set; } = false;
+
+        /// <summary>
+        /// Error Message ...
+        /// </summary>
+        public string ErrorMessage { get; set; }
+    }
+
+    /// <summary>
+    /// Extracted Image ...
+    /// </summary>
+    public class XExtractedImage
+    {
+        /// <summary>
+        /// Content as Byte ...
+        /// </summary>
+        public byte[] Bytes { get; set; }
+
+        /// <summary>
+        /// MIME Type of Image ...
+        /// </summary>
+        public string MimeType { get; set; } = "image/png";
+
+        /// <summary>
+        /// for PDF Files ...
+        /// </summary>
+        public int? PageNumber { get; set; }
+
+        /// <summary>
+        /// Describe Image ...
+        /// </summary>
+        public string Description { get; set; }
+    }
+}

Providers/Enrichers/XAiConversationEnricher.cs

@@ -134,7 +134,9 @@ namespace xAiModels.Providers.Enrichers
             result.Owner = owner;
             result.TitleResource = titleResource;
             result.ProjectTitleResource = projectTitleResource;
+            result.ProjectTitle = projectTitleResource.Resource;
             result.ProjectDescriptionResource = projectDescriptionResource;
+            result.ProjectDescription = projectDescriptionResource.Resource;
 
             //
             return result;

Providers/XAiDataProvider.cs

@@ -10,9 +10,12 @@ using xAiModels.Models.Dtos;
 using xExceptions.Constants;
 using System.Threading.Tasks;
 using xCommons.Configurations;
+using System.Linq.Expressions;
+using xDataService.Extensions;
 using xAiModels.Providers.Hubs;
 using xAiModels.Interfaces.Dtos;
 using xStringService.Interfaces;
+using xAiModels.Models.Entities;
 using System.Collections.Generic;
 using Microsoft.AspNetCore.SignalR;
 using xAiModels.Interfaces.Enrichers;
@@ -1097,6 +1100,193 @@ namespace xAiModels.Providers
         }
         #endregion
 
+        //
+        #region Query ...
+        /// <summary>
+        /// Query Projects ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<XQueryResult<XAiProjectDto>> QueryProjects(
+            string ownerId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            Expression<Func<XAiProject, bool>> predicate = null;
+            if (ownerId.IsNullOrEmpty())
+            {
+                predicate = x => x.OwnerId == ownerId;
+            }
+
+            //
+            var result = await projectRepositoryService.QueryAsync(
+                query: query,
+                predicate: predicate,
+                includeBuilder: null,
+                ignoreSoftDeleteds: true,
+                cancellationToken: cancellationToken,
+                orderBuilder: x => x.OrderBy(y => y.CreatedOn)
+            );
+            if (!result.IsNullOrDefault() &&
+                result.Items.HasChild())
+            {
+                //
+                result.Items = [..await EnrichRange(
+                    sources: result.Items,
+                    fillConversations: false,
+                    fillConversationMessages: false,
+                    cancellationToken: cancellationToken
+                )];
+            }
+
+            //
+            return result;
+        }
+
+        /// <summary>
+        /// Query Conversations ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="projectId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<XQueryResult<XAiConversationDto>> QueryConversations(
+            string ownerId,
+            Guid projectId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            // Validate ...
+            if (projectId.IsDefaultGuid())
+            {
+                XException.InvalidArgs.Throw();
+            }
+
+            //
+            // Retrieve Project ...
+            var project = await projectRepositoryService.GetAsync(
+                id: projectId,
+                includeBuilder: null,
+                ignoreSoftDeleteds: true,
+                cancellationToken: cancellationToken
+            );
+            if (project.IsNullOrDefault())
+            {
+                XException.NotFound.Throw();
+            }
+
+            //
+            Expression<Func<XAiConversation, bool>> predicate = x =>
+                x.ProjectId == projectId;
+            if (ownerId.IsNullOrEmpty())
+            {
+                //
+                predicate = x =>
+                    x.OwnerId == ownerId &&
+                    x.ProjectId == projectId;
+            }
+
+            //
+            var result = await conversationRepositoryService.QueryAsync(
+                query: query,
+                predicate: predicate,
+                includeBuilder: null,
+                ignoreSoftDeleteds: true,
+                cancellationToken: cancellationToken,
+                orderBuilder: x => x.OrderBy(y => y.CreatedOn)
+            );
+            if (!result.IsNullOrDefault() &&
+                result.Items.HasChild())
+            {
+                //
+                result.Items = [..await EnrichRange(
+                    fillMessages: false,
+                    sources: result.Items,
+                    cancellationToken: cancellationToken
+                )];
+            }
+
+            //
+            return result;
+        }
+        
+        /// <summary>
+        /// Query Messages ...
+        /// </summary>
+        /// <param name="ownerId"></param>
+        /// <param name="conversationId"></param>
+        /// <param name="query"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public async Task<XQueryResult<XAiMessageDto>> QueryMessages(
+            string ownerId,
+            Guid conversationId,
+            XQuery query,
+            CancellationToken cancellationToken = default
+        )
+        {
+            //
+            // Validate ...
+            if (conversationId.IsDefaultGuid())
+            {
+                XException.InvalidArgs.Throw();
+            }
+
+            //
+            // Retrieve Conversation ...
+            var conversation = await conversationRepositoryService.GetAsync(
+                id: conversationId,
+                includeBuilder: null,
+                ignoreSoftDeleteds: true,
+                cancellationToken: cancellationToken
+            );
+            if (conversation.IsNullOrDefault())
+            {
+                XException.NotFound.Throw();
+            }
+
+            //
+            Expression<Func<XAiMessage, bool>> predicate = x =>
+                x.ConversationId == conversationId;
+            if (ownerId.IsNullOrEmpty())
+            {
+                //
+                predicate = x =>
+                    x.OwnerId == ownerId &&
+                    x.ConversationId == conversationId;
+            }
+
+            //
+            var result = await messageRepositoryService.QueryAsync(
+                query: query,
+                predicate: predicate,
+                includeBuilder: null,
+                ignoreSoftDeleteds: true,
+                cancellationToken: cancellationToken,
+                orderBuilder: x => x.OrderBy(y => y.CreatedOn)
+            );
+            if (!result.IsNullOrDefault() &&
+                result.Items.HasChild())
+            {
+                //
+                result.Items = [..await EnrichRange(
+                    sources: result.Items,
+                    cancellationToken: cancellationToken
+                )];
+            }
+
+            //
+            return result;            
+        }        
+        #endregion
+
         //
         #region Enrichers ...
         /// <summary>