app,server: Allow to display a recipe

src/routes/recipe.rs

@@ -1,5 +1,10 @@
-use api::{CreateRecipeRequest, CreateRecipeResponse, ListRecipesResponse};
-use axum::{extract::State, Json};
+use api::{
+    CreateRecipeRequest, CreateRecipeResponse, IngredientInfo, ListRecipesResponse, RecipeInfo,
+};
+use axum::{
+    extract::{Path, State},
+    Json,
+};
 use sea_orm::{prelude::*, ActiveValue, TransactionTrait};
 
 use crate::entity::{ingredient, prelude::*, recipe, recipe_ingerdients, recipe_steps};
@@ -77,3 +82,55 @@ pub(super) async fn list_recipes(
     }
     .into())
 }
+
+#[derive(serde::Deserialize)]
+pub(super) struct RecipeId {
+    recipe_id: i64,
+}
+
+pub(super) async fn fetch_recipe(
+    AuthorizedHousehold(household): AuthorizedHousehold,
+    State(state): State<AppState>,
+    Path(RecipeId { recipe_id }): Path<RecipeId>,
+) -> JsonResult<RecipeInfo> {
+    let Some(recipe) = household
+        .find_related(Recipe)
+        .filter(recipe::Column::Id.eq(recipe_id))
+        .one(&state.db).await? else {
+        return Err(RouteError::RessourceNotFound);
+    };
+
+    let steps = recipe
+        .find_related(RecipeSteps)
+        .all(&state.db)
+        .await?
+        .into_iter()
+        .map(|m| m.text)
+        .collect();
+
+    let recipe_ingredients = recipe.find_related(Ingredient).all(&state.db).await?;
+
+    let mut ingredients = Vec::new();
+
+    for ingredient in recipe_ingredients {
+        ingredients.push((
+            ingredient.id,
+            IngredientInfo {
+                name: ingredient.name,
+                unit: ingredient.unit,
+            },
+            RecipeIngerdients::find_by_id((recipe.id, ingredient.id))
+                .one(&state.db)
+                .await?
+                .expect("Ingredient should exist as it was fetched")
+                .amount,
+        ));
+    }
+
+    Ok(RecipeInfo {
+        name: recipe.name,
+        steps,
+        ingredients,
+    }
+    .into())
+}