Added primitive search mechanism in backend.

Began implementing search mechanism for frontend.

Props-Modules/test/Props.Shop/Adafruit.Tests/Api/FakeProductListingManager.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using Props.Shop.Adafruit.Api;
+using Props.Shop.Framework;
+
+namespace Props.Shop.Adafruit.Tests.Api
+{
+    public class FakeProductListingManager : IProductListingManager
+    {
+        private ProductListingsParser parser;
+        private Timer updateTimer;
+        private bool disposedValue;
+
+        private volatile Dictionary<string, IList<ProductListing>> activeListings;
+
+        public IDictionary<string, IList<ProductListing>> ActiveListings => activeListings;
+
+        public event EventHandler DataUpdateEvent;
+
+        public FakeProductListingManager()
+        {
+            parser = new ProductListingsParser();
+        }
+
+        public Task DownloadListings()
+        {
+            if (disposedValue) throw new ObjectDisposedException("FakeProductListingManager");
+            using (Stream stream = File.OpenRead("./Assets/products.json"))
+            {
+                parser.BuildProductListings(stream);
+            }
+
+            Dictionary<string, IList<ProductListing>> results = new Dictionary<string, IList<ProductListing>>();
+            foreach (ProductListing product in parser.ProductListings)
+            {
+                IList<ProductListing> sameProducts = results.GetValueOrDefault(product.Name);
+                if (sameProducts == null) {
+                    sameProducts = new List<ProductListing>();
+                    results.Add(product.Name, sameProducts);
+                }
+
+                sameProducts.Add(product);
+            }
+            activeListings = results;
+            DataUpdateEvent?.Invoke(this, null);
+            return Task.CompletedTask;
+        }
+
+        public void StartUpdateTimer(int delay = 300000, int period = 300000)
+        {
+            if (disposedValue) throw new ObjectDisposedException("FakeProductListingManager");
+            if (updateTimer != null) throw new InvalidOperationException("Update timer already started.");
+            updateTimer = new Timer((state) => DownloadListings(), null, delay, period);
+        }
+
+        public void StopUpdateTimer()
+        {
+            if (disposedValue) throw new ObjectDisposedException("FakeProductListingManager");
+            if (updateTimer == null) throw new InvalidOperationException("Update timer not started.");
+            updateTimer.Dispose();
+            updateTimer = null;
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (!disposedValue)
+            {
+                if (disposing)
+                {
+                    updateTimer?.Dispose();
+                    updateTimer = null;
+                }
+
+                disposedValue = true;
+            }
+        }
+
+        public void Dispose()
+        {
+            Dispose(disposing: true);
+            GC.SuppressFinalize(this);
+        }
+    }
+}

Props-Modules/test/Props.Shop/Adafruit.Tests/Api/ListingParserTest.cs

@@ -10,7 +10,11 @@ namespace Props.Shop.Adafruit.Tests
         [Fact]
         public void TestParsing()
         {
-            ListingsParser mockParser = new ListingsParser(File.ReadAllText("./Assets/products.json"));
+            ProductListingsParser mockParser = new ProductListingsParser();
+            using (Stream stream = File.OpenRead("./Assets/products.json"))
+            {
+                mockParser.BuildProductListings(stream);
+            }
             Assert.NotEmpty(mockParser.ProductListings);
         }
     }

Props-Modules/test/Props.Shop/Adafruit.Tests/Api/ProductListingManagerTest.cs

@@ -1,25 +0,0 @@
-using System.Collections.Generic;
-using System.IO;
-using System.Threading.Tasks;
-using Props.Shop.Adafruit.Api;
-using Props.Shop.Framework;
-using Xunit;
-
-namespace Props.Shop.Adafruit.Tests.Api
-{
-    public class ProductListingManagerTest
-    {
-        [Fact]
-        public async Task TestSearch()
-        {
-            ProductListingManager mockProductListingManager = new ProductListingManager();
-            mockProductListingManager.SetListingsData(File.ReadAllText("./Assets/products.json"));
-            List<ProductListing> results = new List<ProductListing>();
-            await foreach (ProductListing item in mockProductListingManager.Search("arduino", 0.5f))
-            {
-                results.Add(item);
-            }
-            Assert.NotEmpty(results);
-        }
-    }
-}

Props-Modules/test/Props.Shop/Adafruit.Tests/Api/SearchManagerTest.cs

@@ -0,0 +1,20 @@
+using System.Threading.Tasks;
+using Props.Shop.Adafruit.Api;
+using Xunit;
+
+namespace Props.Shop.Adafruit.Tests.Api
+{
+    public class SearchManagerTest
+    {
+        [Fact]
+        public async Task SearchTest()
+        {
+            FakeProductListingManager stubProductListingManager = new FakeProductListingManager();
+            SearchManager searchManager = new SearchManager(stubProductListingManager);
+            await stubProductListingManager.DownloadListings();
+            searchManager.Similarity = 0.8f;
+            Assert.NotEmpty(searchManager.Search("Raspberry Pi"));
+            searchManager.Dispose();
+        }
+    }
+}