1 files changed, 81 insertions, 0 deletions
diff --git a/lib/VNLib.Plugins.Extensions.Data/src/Extensions.cs b/lib/VNLib.Plugins.Extensions.Data/src/Extensions.cs
new file mode 100644
index 0000000..1e0c8de
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+++ b/lib/VNLib.Plugins.Extensions.Data/src/Extensions.cs
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+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins.Extensions.Data
+* File: Extensions.cs 
+*
+* Extensions.cs is part of VNLib.Plugins.Extensions.Data which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins.Extensions.Data is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins.Extensions.Data is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins.Extensions.Data. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Collections.Generic;
+
+using Microsoft.EntityFrameworkCore;
+
+using VNLib.Utils;
+using VNLib.Plugins.Extensions.Data.Abstractions;
+
+namespace VNLib.Plugins.Extensions.Data
+{
+    public static class Extensions
+    {
+
+        public static int GetPageOrDefault(this IReadOnlyDictionary<string, string> queryArgs, int @default, int minClamp = 0, int maxClamp = int.MaxValue)
+        {
+            return queryArgs.TryGetValue("page", out string? pageStr) && int.TryParse(pageStr, out int page) ? Math.Clamp(page, minClamp, maxClamp) : @default;
+        }
+
+        public static int GetLimitOrDefault(this IReadOnlyDictionary<string, string> queryArgs, int @default, int minClamp = 0, int maxClamp = int.MaxValue)
+        {
+            return queryArgs.TryGetValue("limit", out string? limitStr) && int.TryParse(limitStr, out int limit) ? Math.Clamp(limit, minClamp, maxClamp) : @default;
+        }
+
+        public static async Task<ERRNO> AddBulkAsync<TEntity>(this DbStore<TEntity> store, IEnumerable<TEntity> records, string userId, bool overwriteTime = true) 
+            where TEntity : class, IDbModel, IUserEntity
+        {
+            //Open context and transaction
+            await using TransactionalDbContext database = store.NewContext();
+            await database.OpenTransactionAsync();
+            //Get the entity set
+            DbSet<TEntity> set = database.Set<TEntity>();
+            //Generate random ids for the feeds and set user-id
+            foreach (TEntity entity in records)
+            {
+                entity.Id = store.RecordIdBuilder;
+                //Explicitly assign the user-id
+                entity.UserId = userId;
+                //If the entity has the default created time, update it, otherwise leave it as is
+                if (overwriteTime || entity.Created == default)
+                {
+                    entity.Created = DateTime.UtcNow;
+                }
+                //Update last-modified time
+                entity.LastModified = DateTime.UtcNow;
+            }
+            //Add feeds to database
+            set.AddRange(records);
+            //Commit changes
+            ERRNO count = await database.SaveChangesAsync();
+            //Commit transaction and exit
+            await database.CommitTransactionAsync();
+            return count;
+        }
+    }
+}