Added identifier and fetch time product listings; Added persistence to AdafruitShop.

Implemented in AdafruitShop.

AdafruitShop Product listing data now persisted.

AdafruitShop configuration now persisted.

Props-Modules/Props.Shop/Framework/IShop.cs

@@ -15,9 +15,10 @@ namespace Props.Shop.Framework
 
         public IAsyncEnumerable<ProductListing> Search(string query, Filters filters);
 
-        public Task<ProductListing> GetProductListingFromUrl(string url);
+        public Task<ProductListing> GetProductFromIdentifier(string identifier);
 
         void Initialize(string workspaceDir, ILoggerFactory loggerFactory);
+        ValueTask SaveData();
         public SupportedFeatures SupportedFeatures { get; }
     }
 }

Props-Modules/Props.Shop/Framework/ProductListing.cs

@@ -1,3 +1,5 @@
+using System;
+
 namespace Props.Shop.Framework
 {
     public class ProductListing
@@ -13,5 +15,41 @@ namespace Props.Shop.Framework
         public int? ReviewCount { get; set; }
         public bool ConvertedPrices { get; set; }
         public bool? InStock { get; set; }
+        public string Identifier { get; set; }
+        public DateTime TimeFetchedUtc { get; set; }
+
+        public override bool Equals(object obj)
+        {
+            if (obj == null || GetType() != obj.GetType())
+            {
+                return false;
+            }
+
+            ProductListing other = obj as ProductListing;
+            return
+            this.LowerPrice == other.LowerPrice &&
+            this.UpperPrice == other.UpperPrice &&
+            this.Shipping == other.Shipping &&
+            this.Name == other.Name &&
+            this.URL == other.URL &&
+            this.ImageURL == other.ImageURL &&
+            this.Rating == other.Rating &&
+            this.PurchaseCount == other.PurchaseCount &&
+            this.ReviewCount == other.ReviewCount &&
+            this.ConvertedPrices == other.ConvertedPrices &&
+            this.InStock == other.InStock &&
+            this.Identifier == other.Identifier &&
+            this.TimeFetchedUtc == other.TimeFetchedUtc;
+        }
+
+        public override int GetHashCode()
+        {
+            return (Name, URL, UpperPrice, LowerPrice, ImageURL).GetHashCode();
+        }
+
+        public ProductListing Copy()
+        {
+            return MemberwiseClone() as ProductListing;
+        }
     }
 }