Added vector search

Seasoned.Backend/Controllers/RecipeController.cs

@@ -6,6 +6,8 @@ using System.Security.Claims;
 using Seasoned.Backend.Models;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.EntityFrameworkCore;
+using Pgvector;
+using Pgvector.EntityFrameworkCore;
 
 namespace Seasoned.Backend.Controllers;
 
@@ -55,6 +57,9 @@ public class RecipeController : ControllerBase
             UserId = userId
         };
 
+        var fullText = $"{recipeDto.Title} {string.Join(" ", recipeDto.Ingredients)} {string.Join(" ", recipeDto.Instructions)}";
+        recipe.Embedding = await _recipeService.GetEmbeddingAsync(fullText);
+
         _context.Recipes.Add(recipe);
         await _context.SaveChangesAsync();
 
@@ -110,4 +115,23 @@ public class RecipeController : ControllerBase
         var result = await _recipeService.ConsultChefAsync(request.Prompt);
         return Ok(result);
     }
+
+    [HttpGet("search")]
+    public async Task<ActionResult<IEnumerable<Recipe>>> SearchRecipes([FromQuery] string query)
+    {
+        var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
+        
+        if (string.IsNullOrWhiteSpace(query))
+            return await GetMyRecipes();
+            
+        var queryVector = await _recipeService.GetEmbeddingAsync(query);
+
+        var results = await _context.Recipes
+            .Where(r => r.UserId == userId)
+            .OrderBy(r => r.Embedding!.CosineDistance(queryVector))
+            .Take(15)
+            .ToListAsync();
+
+        return Ok(results);
+    }
 }

Seasoned.Backend/Migrations/20260318201722_InitialCreateWith768Vector.Designer.cs

@@ -6,6 +6,7 @@ using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Pgvector;
 using Seasoned.Backend.Data;
 
 #nullable disable
@@ -13,8 +14,8 @@ using Seasoned.Backend.Data;
 namespace Seasoned.Backend.Migrations
 {
     [DbContext(typeof(ApplicationDbContext))]
-    [Migration("20260318044626_ChangeIconToImageUrl")]
+    [Migration("20260318201722_InitialCreateWith768Vector")]
-    partial class ChangeIconToImageUrl
+    partial class InitialCreateWith768Vector
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -234,6 +235,9 @@ namespace Seasoned.Backend.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<Vector>("Embedding")
+                        .HasColumnType("vector(768)");
+
                     b.Property<string>("ImageUrl")
                         .HasColumnType("text");
 

Seasoned.Backend/Migrations/20260318201722_InitialCreateWith768Vector.cs

@@ -2,13 +2,14 @@
 using System.Collections.Generic;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Pgvector;
 
 #nullable disable
 
 namespace Seasoned.Backend.Migrations
 {
     /// <inheritdoc />
-    public partial class ChangeIconToImageUrl : Migration
+    public partial class InitialCreateWith768Vector : Migration
     {
         /// <inheritdoc />
         protected override void Up(MigrationBuilder migrationBuilder)
@@ -172,7 +173,8 @@ namespace Seasoned.Backend.Migrations
                     Ingredients = table.Column<List<string>>(type: "text[]", nullable: false),
                     Instructions = table.Column<List<string>>(type: "text[]", nullable: false),
                     CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
-                    UserId = table.Column<string>(type: "text", nullable: true)
+                    UserId = table.Column<string>(type: "text", nullable: true),
+                    Embedding = table.Column<Vector>(type: "vector(768)", nullable: true)
                 },
                 constraints: table =>
                 {

Seasoned.Backend/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -5,6 +5,7 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Pgvector;
 using Seasoned.Backend.Data;
 
 #nullable disable
@@ -231,6 +232,9 @@ namespace Seasoned.Backend.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<Vector>("Embedding")
+                        .HasColumnType("vector(768)");
+
                     b.Property<string>("ImageUrl")
                         .HasColumnType("text");
 

Seasoned.Backend/Models/Recipe.cs

@@ -1,3 +1,6 @@
+using Pgvector;
+using System.ComponentModel.DataAnnotations.Schema;
+
 namespace Seasoned.Backend.Models;
 
 public class Recipe {
@@ -8,4 +11,7 @@ public class Recipe {
     public List<string> Instructions { get; set; } = new();
     public DateTime CreatedAt { get; set; }
     public string? UserId { get; set; } 
+
+    [Column(TypeName = "vector(768)")]
+    public Vector? Embedding { get; set; }
 }

Seasoned.Backend/Seasoned.Backend.csproj

@@ -13,6 +13,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="9.0.2" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.13" />
     <PackageReference Include="Mscc.GenerativeAI" Version="2.2.8" />
+    <PackageReference Include="pgvector" Version="0.3.2" />
     <PackageReference Include="Pgvector.EntityFrameworkCore" Version="0.3.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.2">
       <PrivateAssets>all</PrivateAssets>

Seasoned.Backend/Services/IRecipeService.cs

@@ -6,4 +6,5 @@ public interface IRecipeService
 {
     Task<RecipeResponseDto> ParseRecipeImageAsync(IFormFile image);
     Task<ChefConsultResponseDto> ConsultChefAsync(string userPrompt);
+    Task<Pgvector.Vector> GetEmbeddingAsync(string text);
 }

Seasoned.Backend/Services/RecipeService.cs

@@ -5,16 +5,33 @@ using System.IO;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using Microsoft.Extensions.Configuration;
+using Pgvector;
 
 namespace Seasoned.Backend.Services;
 
 public class RecipeService : IRecipeService
 {
     private readonly string _apiKey;
+    private readonly GoogleAI _googleAI;
 
     public RecipeService(IConfiguration config)
     {
         _apiKey = config["GEMINI_API_KEY"] ?? throw new ArgumentNullException("API Key missing");
+        _googleAI = new GoogleAI(_apiKey);
+    }
+
+    public async Task<Vector> GetEmbeddingAsync(string text)
+    {
+        var model = _googleAI.GenerativeModel("text-embedding-004");
+        
+        var response = await model.EmbedContent(text);
+    
+        if (response.Embedding?.Values != null)
+        {
+            return new Vector(response.Embedding.Values.ToArray());
+        }
+
+    throw new Exception("The Chef couldn't extract the meaning from that recipe text.");
     }
 
     public async Task<RecipeResponseDto> ParseRecipeImageAsync(IFormFile image)
@@ -75,6 +92,7 @@ public class RecipeService : IRecipeService
         }
         catch (JsonException ex)
         {
+            Console.WriteLine($"Chef's Error: JSON Parsing failed. Message: {ex.Message}");
             Console.WriteLine($"Raw AI Output: {rawText}");
             return new RecipeResponseDto { Title = "Parsing Error" };
         }
@@ -145,4 +163,5 @@ public class RecipeService : IRecipeService
         if (start == -1 || end == -1) return string.Empty;
         return rawText.Substring(start, (end - start) + 1);
     }
+    
 }