feat: add route multiples ingredients to find a recipe

API-Project/src/controllers/recipes.controller.ts

@@ -40,4 +40,30 @@ RecipesController.get('/:id', async (req, res) => {
     }
 })
 
+RecipesController.get('/withingr/:ids', async (req, res) => {
+    let ids: number[] = [];
+    let raw_ids = String(req.params.ids).split(':')
+    for (let key in raw_ids) {
+        const test = Number(raw_ids[key])
+        if (Number.isNaN(test) || !Number.isInteger(test)) {
+            res.status(400).json('A parameter is not an integer')
+        }
+        ids.push(Number(test))
+    }
+
+    try {
+        const recipes = await recipes_gw.getIdsRecipesThatContainsIngredients(ids)
+
+        if (recipes.length == 0) {
+            res.status(404).json('no data found')
+        } 
+        else {
+            res.status(200).json(recipes)
+        }
+    } catch (error) {
+        const error_error = error as Error
+        res.status(500).send(error_error.message)
+    }
+})
+
 export { RecipesController }

API-Project/src/gateways/recipe.gateway.ts

@@ -58,4 +58,34 @@ export class RecipeGateway {
 
         return recipe;
     }
+
+    async getIdsRecipesThatContainsIngredients(ids: number[]) : Promise<Recipe[]> {
+        let recipes: Recipe[] = []
+
+        const client = await this.connection.getPoolClient()
+
+        let query_list_text = '($1'
+        for (let count = 1; count < ids.length; count++) {
+            query_list_text = query_list_text + ', $' + String(count+1)
+        }
+        query_list_text = query_list_text + ')'
+        
+        const query = {
+            text: 'SELECT idRecipe FROM Composed GROUP BY idRecipe HAVING COUNT(DISTINCT idIngredient) = COUNT(DISTINCT CASE WHEN idIngredient IN ' + query_list_text + ' THEN idIngredient END)',
+            values: ids
+        }
+
+        const res = await client.query(query)
+
+        client.release()
+
+        for(var key in res.rows) {
+            const recipe = await this.getById(Number(res.rows[key].idrecipe))
+            if (recipe != null) {
+                recipes.push(recipe)
+            }
+        }
+
+        return recipes
+    }
 }