Refactor food item flow and barcode handling

Updated routes and templates to improve the process of adding and logging food items by barcode. The add_food_item route now accepts a barcode parameter, and barcode lookups redirect to item creation if not found. The log_food flow now uses session variables for item and meal selection, and the get_item.html template uses fetch to handle barcode lookups and redirects accordingly.

application/user/routes.py

@@ -59,9 +59,9 @@ fields = [
 ]
 
 
-@user_bp.route("/add_food_item", methods=["POST"])
-def add_food_item():
-    form = FoodItemForm()
+@user_bp.route("/add_food_item/<string:barcode>", methods=["GET", "POST"])
+def add_food_item(barcode):
+    form = FoodItemForm(barcode=barcode)
 
     if form.validate_on_submit():
         print("[DEBUG] Valid form")
@@ -92,9 +92,9 @@ def add_food_item():
     else:
         print("[DEBUG] Invalid form")
     if form.barcode.data:
-        return redirect(url_for("user.food_item", barcode=form.barcode.data))
+        return render_template("add_food_item.html", form=form)
     else:
-        return redirect(url_for("scan"))
+        return redirect("/")
 
 
 @user_bp.route("/edit_food_item/<int:id>", methods=["GET", "POST"])
@@ -119,7 +119,7 @@ def edit_food_item(id: int):
     return redirect(url_for("user.dashboard"))
 
 
-@user_bp.route("/food_item/<int:barcode>", methods=["GET"])
+@user_bp.route("/food_item/<string:barcode>", methods=["GET"])
 def food_item(barcode):
     food = FoodItem.query.filter_by(barcode=barcode).first()
     if food:
@@ -161,24 +161,27 @@ def add_food_item_manual():
     return render_template("add_food_item_manual.html", form=form)
 
 
-@user_bp.route("/log_food/<int:item_id>", methods=["GET", "POST"])
-def log_food(item_id):
+@user_bp.route("/log_food", methods=["GET", "POST"])
+def log_food():
     form = FoodLogForm()
-    if item_id is not None:
-        if db.session.get(FoodItem, item_id):
-            if form.validate_on_submit():
-                assert form.amount.data is not None
-                db.session.add(
-                    FoodLog(
-                        item_id,
-                        current_user.id,
-                        form.amount.data,
-                        part_of_day=0,
-                    )
+    item_id = session["item_id"]
+    meal_type = session["meal_type"]
+    if item_id is None or meal_type is None:
+        return redirect("/")
+    if db.session.get(FoodItem, item_id):
+        if form.validate_on_submit():
+            assert form.amount.data is not None
+            db.session.add(
+                FoodLog(
+                    item_id,
+                    current_user.id,
+                    form.amount.data,
+                    part_of_day=meal_type,
                 )
-                db.session.commit()
-                return redirect(url_for("user.dashboard"))
-    return render_template("log_food.html", item_id=item_id, form=form)
+            )
+            db.session.commit()
+            return redirect(url_for("user.dashboard"))
+    return render_template("log_food.html", form=form)
 
 
 @user_bp.route("/overview", methods=["GET"])
@@ -193,7 +196,14 @@ def select_meal(meal_type: int):
     return redirect(url_for("user.scan_product"))
 
 
-@user_bp.route("/get_userid", methods=["GET"])
+@user_bp.route("/select_item/<int:item_id>", methods=["GET"])
+def select_item(item_id: int):
+    assert type(item_id) is int
+    session["item_id"] = item_id
+    return redirect(url_for("user.log_food"))
+
+
+@user_bp.route("/get_foodid", methods=["GET"])
 def scan_product():
     return render_template("get_item.html")
 
@@ -221,9 +231,13 @@ def test():
 
 @user_bp.route("/foodId_from_barcode/<string:barcode>", methods=["GET"])
 def foodId_from_barcode(barcode: str):
-    if barcode.isdigit():
-        return jsonify({"food_id": barcode})
-    else:
+    # Check if barcode contains only digits
+    if not barcode.isdigit():
         return abort(
             400, description="Invalid barcode: must contain only digits"
         )
+
+    item = current_user.food_items.filter_by(barcode=barcode).first()
+    if item is None:
+        return redirect(url_for("user.add_food_item", barcode=barcode))
+    return jsonify({"item_id": item.id})