Beginning of the model

backend/src/model.rs

@@ -0,0 +1,34 @@
+struct Recipe {
+   ingredients: Vec<Ingredient>,
+   process: Vec<Group>,
+}
+
+struct Ingredient {
+    quantity: Quantity,
+    name: String,
+}
+
+struct Quantity {
+    value: f32,
+    unit: String,
+}
+struct Group {
+    name: String,
+    steps: Vec<Step>,
+}
+
+struct Step {
+   action: String,
+   input: Vec<StepInput>,
+   output: Vec<IntermediateSubstance>,
+}
+
+struct IntermediateSubstance {
+    name: String,
+    quantity: Option<Quantity>,
+}
+
+enum StepInput {
+    Ingredient(Ingredient),
+    IntermediateSubstance,
+}