Load and save recipes from backend

backend/src/server.ts

@@ -12,22 +12,35 @@ app.use(express.json());
 
 let recipeList = recipes;
 // Routes
-app.get("/recipe", (req, res) => res.json(recipeList));
+app.get("/recipe", (req, res) => {
+  console.log("GET /recipe")
+  res.json(recipeList);
+});
 
 app.get("/recipe/:id", (req, res) => {
+  let recipeId : string = req.params.id;
+  console.log("GET /recipe/", recipeId);
   const recipe = recipeList.find(r => r.id === req.params.id);
+  console.log(recipe ? "SUCCESS" : "404")
   recipe ? res.json(recipe) : res.status(404).send("Recipe not found");
 });
 
 app.post("/recipe", (req, res) => {
+  console.log("POST /recipe")
   const newRecipe: Recipe = { id: uuidv4(), ...req.body };
   recipeList.push(newRecipe);
   res.status(201).json(newRecipe);
 });
 
 app.put("/recipe/:id", (req, res) => {
-  const index = recipes.findIndex(r => r.id === req.params.id);
+  let recipeId : string = req.params.id;
-  if (index === -1) return res.status(404).send("Recipe not found");
+  console.log("PUT /recipe/", recipeId)
+  const index = recipes.findIndex(r => r.id === recipeId);
+  if (index === -1) {
+    console.log("404")
+    return res.status(404).send("Recipe not found");
+  }
+  console.log("SUCCESS");
   recipeList[index] = { ...recipeList[index], ...req.body };
   res.json(recipeList[index]);
 });

frontend/src/api/recipePoint.ts

@@ -4,8 +4,16 @@ import { API_BASE_URL } from "../config/api"
 /**
  * Util for handling the recipe api
  */
+/**
+ * URL for handling recipes
+ */
 const RECIPE_URL = `${API_BASE_URL}/recipe`
 
+/**
+ * Load a single recipe
+ * @param id ID of the recipe to load
+ * @returns A single recipe
+ */
 export async function fetchRecipe(id: string): Promise<Recipe> {
   const res = await fetch(`${RECIPE_URL}/${id}`)
   if (!res.ok) {
@@ -14,6 +22,23 @@ export async function fetchRecipe(id: string): Promise<Recipe> {
   return res.json()
 }
 
+/**
+ * Load list of all recipes
+ * @returns Array of recipe
+ */
+export async function fetchRecipeList(): Promise<Recipe[]> {
+  const res = await fetch(`${RECIPE_URL}/`)
+  if (!res.ok) {
+    throw new Error(`Failed to fetch recipe list`)
+  }
+  return res.json()
+}
+
+/**
+ * Create new Recipe
+ * @param recipe Recipe to create
+ * @returns Saved recipe
+ */
 export async function createRecipe(recipe: Recipe): Promise<Recipe> {
   const res = await fetch(RECIPE_URL, {
     method: "POST",
@@ -26,6 +51,11 @@ export async function createRecipe(recipe: Recipe): Promise<Recipe> {
   return res.json()
 }
 
+/**
+ * Save an existing recipe
+ * @param recipe Recipe to save. This recipe must have an ID!
+ * @returns Saved recipe
+ */
 export async function updateRecipe(recipe: Recipe): Promise<Recipe> {
   const res = await fetch(`${RECIPE_URL}/${recipe.id}`, {
     method: "PUT",

frontend/src/components/recipes/RecipeDetailPage.tsx

@@ -1,7 +1,7 @@
 import { useParams, Link } from "react-router-dom"
-import { recipes } from "../../mock_data/recipes"
 import type { Recipe } from "../../types/recipe"
-import { useState } from "react"
+import { useEffect, useState } from "react"
+import { fetchRecipe } from "../../api/recipePoint"
 
 
 /**
@@ -11,22 +11,43 @@ import { useState } from "react"
 export default function RecipeDetailPage() {
   // Extract recipe ID from route params
   const { id } = useParams<{ id: string }>()
-  const recipe = recipes.find((r) => r.id === id)
+  // the recipe loaded from the backend, don't change this! it's required for scaling
+  const [recipe, setRecipe] = useState<Recipe | null>(null)
+  // Working copy for re-calculating ingredients
+  const [recipeWorkingCopy, setRecipeWorkingCopy] = useState<Recipe|null>(null)
+  // load recipe data whenever id changes
+    useEffect(() => {
+      const loadRecipe = async () => {
+        if (id) {
+          try {
+            // Fetch recipe data when editing an existing one
+            console.log("loading recipe with id", id)
+            const data = await fetchRecipe(id)
+            setRecipe(data)
+          } catch (err) {
+            console.error(err)
+          }
+        }
+      }
+  
+      loadRecipe()
+    }, [id])
+
+    // set original recipe data and working copy when recipe changes
+    useEffect( ()=> {
+        setRecipeWorkingCopy(recipe);
+    }, [recipe])
 
 
-  if (!recipe) {
+  if (!recipe || !recipeWorkingCopy) {
     return <p className="p-6">Recipe not found.</p>
   }
   
-  // Working copy for re-calculating ingredients
-  const [recipeWorkingCopy, updateRecipeWorkingCopy] = useState<Recipe>(recipe)
-  // Keep original immutable for scaling
-  const [originalRecipe] = useState<Recipe>(recipe)
 
    /** recalculate ingredients based on the amount of servings */
   const recalculateIngredients = (newAmount: number) => {
     // Always calculate factor from the *original recipe*, not the working copy
-    const factor = newAmount / originalRecipe.servings.amount
+    const factor = newAmount / recipe.servings.amount
 
     // Create a new ingredient list with updated amounts
     const updatedIngredientGroupList = recipe.ingredientGroupList.map((ingGrp) => ({
@@ -38,7 +59,7 @@ export default function RecipeDetailPage() {
     }))
 
     // Update working copy with new servings + recalculated ingredients
-    updateRecipeWorkingCopy({
+    setRecipeWorkingCopy({
       ...recipeWorkingCopy,
       servings: {
         ...recipeWorkingCopy.servings,

frontend/src/components/recipes/RecipeEditPage.tsx

@@ -5,6 +5,7 @@ import  RecipeEditor  from "./RecipeEditor"
 import { fetchRecipe, createRecipe, updateRecipe } from "../../api/recipePoint"
 
 export default function RecipeEditPage() {
+    // Extract recipe ID from route params
   const { id } = useParams<{ id: string }>()
   const [recipe, setRecipe] = useState<Recipe | null>(null)
   const navigate = useNavigate()

frontend/src/components/recipes/RecipeListPage.tsx

@@ -1,17 +1,38 @@
-import { recipes } from "../../mock_data/recipes"
+import { useEffect, useState } from "react"
 import RecipeListItem from "./RecipeListItem"
+import type { Recipe } from "../../types/recipe"
+import { fetchRecipeList } from "../../api/recipePoint"
 
 /**
  * Displays a list of recipes in a sidebar layout.
  * Each recipe link fills the available width.
  */
 export default function RecipeListPage() {
+
+    const [recipeList, setRecipeList] = useState<Recipe[]|null>(null)
+    // load recipes once on render
+      useEffect(() => {
+        const loadRecipeList = async () => { 
+            try {
+              // Fetch recipe data when editing an existing one
+              console.log("loading recipe list")
+              const data = await fetchRecipeList()
+              setRecipeList(data)
+            } catch (err) {
+              console.error(err)
+            }
+        }
+        loadRecipeList()
+      }, [])
+  
+  if(!recipeList) { return <div>Unable to load recipes1</div>}
+  // @todo find a better representation than an oldfashioned sidebar
   return (
     <div className="sidebar">
       <h1 className="sidebar-title">Recipes</h1>
 
       <div className="flex flex-col gap-2">
-        {recipes.map((recipe) => (
+        {recipeList.map((recipe) => (
           <RecipeListItem 
             key={recipe.id}
             title = {recipe.title}