Works on ingredients

cookbook/migrations/2019-01-27-201901_create_recipes/up.sql

@@ -2,7 +2,7 @@
 CREATE TABLE recipes (
   id INTEGER PRIMARY KEY NOT NULL,
   title VARCHAR NOT NULL,
-  category INTEGER NOT NULL,
+  category SMALLINT NOT NULL,
   ingredients TEXT NOT NULL,
   preparation TEXT NOT NULL
 )

cookbook/src/bin/show_recipes.rs

@@ -3,7 +3,22 @@ extern crate diesel;
 
 use self::cookbook::*;
 use self::models::*;
-use self::diesel::prelude::*;
+
+use diesel::sqlite::SqliteConnection;
+use cookbook::models::fields::IngredientList;
+
+struct IngredientListManager<'a>(&'a SqliteConnection, IngredientList);
+
+impl<'a> IngredientListManager<'a> {
+    fn display_lines(&self) -> String {
+        let mut repr = String::new();
+        for id in self.1.iter() {
+            let ingdt = ingredients::get(self.0, id).expect("Database integrity error");
+            repr.push_str(&format!("{}\n", ingdt.alias));
+        }
+        repr
+    }
+}
 
 fn main() {
 
@@ -13,6 +28,6 @@ fn main() {
     for rec in result {
         println!("*************\n{}\n({:?})", rec.title, rec.category);
         println!("-------------\n");
-        println!("{}", rec.ingredients);
+        println!("{}", rec.ingredients.as_string());
     }
 }

cookbook/src/bin/write_recipe.rs

@@ -1,16 +1,16 @@
 extern crate cookbook;
 extern crate diesel;
 
-use std::io::{Read, stdin};
+use std::io::{stdin};
 use diesel::SqliteConnection;
 use self::cookbook::*;
-use self::models::{NewRecipe, fields::RecipeCategory};
+use self::models::{NewRecipe, fields::RecipeCategory, fields::IngredientList};
 
 struct CreateRecipe<'a> {
     connection: &'a SqliteConnection,
     title: &'a str,
     category: Option<RecipeCategory>,
-    ingredients: String,
+    ingredients: IngredientList,
 }
 
 impl<'a> CreateRecipe<'a> {
@@ -19,7 +19,7 @@ impl<'a> CreateRecipe<'a> {
             connection: conn,
             title: "New recipe",
             category: None,
-            ingredients: String::new(),
+            ingredients: IngredientList::new(),
         }
     }
 
@@ -35,23 +35,23 @@ impl<'a> CreateRecipe<'a> {
         use crate::ingredients::*;
 
         // Check it exists or create
-        if let Some(_ingdt) = find(self.connection, &name) {
+        match get_id_or_create(self.connection, &name) {
-            println!("=");
+            Ok(id) => {
-        } else {
+                println!("Got id {}", id);
-            create(self.connection, &name);
+                self.ingredients.push(id);
-            println!("+{}", &name);
+            },
+            Err(_) => println!("Error adding ingredient")
         }
-
-        self.ingredients.push_str(&name);
     }
 
     /// Builds a NewRecipe instance from current data and insert it.
     fn insert(self) {
-        let new_recipe = NewRecipe::new(
+        let new_recipe = NewRecipe {
-            self.title,
+            title: self.title,
-            self.category.unwrap_or(RecipeCategory::Breakfast),
+            category: self.category.unwrap_or(RecipeCategory::Breakfast),
-            &self.ingredients,
+            ingredients: self.ingredients,
-            "");
+            preparation: ""
+        };
         match new_recipe.insert(self.connection) {
             Ok(new) => println!("Added {}", new.title),
             Err(e) => println!("Error: {}", e),

cookbook/src/lib.rs

@@ -40,34 +40,52 @@ pub mod recipes {
     }
 }
 
-
 pub mod ingredients {
-    use crate::models::{Ingredient, NewIngredient};
+    use crate::models::{Ingredient, NewIngredient, fields::IngredientId};
     use super::{SqliteConnection, schema};
     use super::diesel::prelude::*;
 
-    pub fn find(conn: &SqliteConnection, name: &str) -> Option<Ingredient> {
+    /// Returns the id of the ingredient identifiable by `name: &str`
-        use self::schema::ingredients::dsl::*;
+    /// If the ingredient does not yet exists, it is inserted in database.
-
+    pub fn get_id_or_create(conn: &SqliteConnection, name: &str) -> Result<i32,String> {
-        let results = ingredients.filter(alias.like(name))
+        if let Some(ingdt) = find(conn, name) {
-            .limit(1)
+            return Ok(ingdt.id);
-            .load::<Ingredient>(conn)
-            .expect("Error finding ingredient");
-
-        if !results.is_empty() {
-            Some(results.into_iter().nth(0).unwrap())
         } else {
-            None
+            return create(conn, name);
         }
     }
 
-    pub fn create(conn: &SqliteConnection, name: &str) -> usize {
+    pub fn get(conn: &SqliteConnection, ingdt_id: &IngredientId) -> Result<Ingredient,String> {
-        use self::schema::ingredients;
+        use self::schema::ingredients::dsl::*;
 
-        diesel::insert_into(ingredients::table)
+        ingredients.filter(id.eq(ingdt_id))
+            .first::<Ingredient>(conn)
+            .map_err(|e| format!("Could not retrieve : {}", e))
+    }
+
+    fn find(conn: &SqliteConnection, name: &str) -> Option<Ingredient> {
+        use self::schema::ingredients::dsl::*;
+
+        match ingredients.filter(alias.like(name))
+            .first(conn)
+        {
+            Ok(ingdt) => Some(ingdt),
+            Err(_) => None,
+        }
+    }
+
+    fn create(conn: &SqliteConnection, name: &str) -> Result<i32,String> {
+        use self::schema::ingredients::dsl::*;
+
+        let _ = diesel::insert_into(ingredients)
             .values(&NewIngredient { alias: name })
             .execute(conn)
-            .expect("Error inserting ingredient")
+            .map_err(|e| format!("Error inserting ingredient ! {:?}", e))?;
+        let inserted = ingredients
+            .order(id.desc())
+            .first::<Ingredient>(conn)
+            .map_err(|e| format!("No ingredient at all ! {:?}", e))?;
+        Ok(inserted.id)
     }
 }
 

cookbook/src/models.rs

@@ -57,8 +57,7 @@ pub mod fields {
     }
 
     impl<DB: Backend> FromSql<SmallInt, DB> for RecipeCategory
-    where
+        where i16: FromSql<SmallInt, DB>
-        i16: FromSql<SmallInt, DB>
     {
         fn from_sql(bytes: Option<&DB::RawValue>) -> deserialize::Result<Self> {
             let v = i16::from_sql(bytes)?;
@@ -68,13 +67,70 @@ pub mod fields {
     }
 
     impl<DB: Backend> ToSql<SmallInt, DB> for RecipeCategory
-    where
+        where i16: ToSql<SmallInt, DB>
-        i16: ToSql<SmallInt, DB>{
+    {
         fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> serialize::Result {
             i16::to_sql(&(*self as i16), out)
         }
     }
 
+    pub type IngredientId = i32;
+
+    #[derive(Debug, Clone, FromSqlRow, AsExpression)]
+    #[sql_type = "Text"]
+    pub struct IngredientList(Vec<IngredientId>);
+
+    /// Just a basic method for now
+    impl IngredientList {
+        pub fn new() -> Self {
+            IngredientList(Vec::new())
+        }
+
+        pub fn as_string(&self) -> String {
+            self.0.iter()
+                  .map(|i| format!("{}", i))
+                  .collect::<Vec<String>>()
+                  .join(" ")
+        }
+    }
+
+    impl std::ops::Deref for IngredientList {
+        type Target = Vec<IngredientId>;
+
+        fn deref(&self) -> &Self::Target {
+            &self.0
+        }
+    }
+
+    impl std::ops::DerefMut for IngredientList {
+
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            &mut self.0
+        }
+    }
+
+    impl<DB: Backend> FromSql<Text, DB> for IngredientList
+        where String: FromSql<Text, DB>
+    {
+        fn from_sql(bytes: Option<&DB::RawValue>) -> deserialize::Result<Self> {
+            let data = String::from_sql(bytes)?;
+            Ok(
+                IngredientList(
+                    data.split(" ")
+                        .map(|i| i.parse::<IngredientId>().unwrap())
+                        .collect()
+            ))
+        }
+    }
+
+    impl<DB: Backend> ToSql<Text, DB> for IngredientList
+        where String: ToSql<Text, DB>
+    {
+        fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> serialize::Result {
+            String::to_sql(&self.as_string(), out)
+        }
+    }
+
 }
 
 
@@ -84,7 +140,7 @@ pub struct Recipe {
     pub id: i32,
     pub title: String,
     pub category: fields::RecipeCategory,
-    pub ingredients: String,
+    pub ingredients: fields::IngredientList,
     pub preparation: String,
 }
 
@@ -93,20 +149,11 @@ pub struct Recipe {
 pub struct NewRecipe<'a> {
     pub title: &'a str,
     pub category: fields::RecipeCategory,
-    pub ingredients: &'a str,
+    pub ingredients: fields::IngredientList,
     pub preparation: &'a str,
 }
 
 impl<'a> NewRecipe<'a> {
-    pub fn new(title: &'a str, category: fields::RecipeCategory, ingredients: &'a str, preparation: &'a str) -> Self {
-        NewRecipe{
-            title,
-            category,
-            ingredients,
-            preparation,
-        }
-    }
-
     pub fn insert(self, conn: &SqliteConnection) -> Result<Self, String> {
         diesel::insert_into(recipes::table)
             .values(&self)

planner/src/bin/weekly.rs

@@ -14,6 +14,7 @@ use self::planner::solver::{Variables, Domain, Problem};
 type Day = String;
 const DAYS: &[&str] = &["Lundi", "Mardi", "Mercredi"];
 
+#[allow(dead_code)]
 enum Meals {
     Breakfast(Day),
     Lunch(Day),
@@ -41,8 +42,9 @@ fn generate_variables<V>(domain: &Domain<V>) -> Vec<(String, &Domain<V>, Option<
 }
 
 fn ingredients_contains<'a>(assign: &Variables<'a,Recipe>) -> bool {
-       assign.get("Lundi_Lunch").unwrap().unwrap().ingredients.contains("Patates")
+    let id = 0;
-    && !assign.get("Mardi_Lunch").unwrap().unwrap().ingredients.contains("Patates")
+       assign.get("Lundi_Lunch").unwrap().unwrap().ingredients.contains(&id)
+    && !assign.get("Mardi_Lunch").unwrap().unwrap().ingredients.contains(&id)
 }
 
 

planner/src/solver.rs

@@ -13,6 +13,7 @@ enum Assignment<'a, V> {
     Clear(String)
 }
 
+
 type Domains<'a, V> = HashMap<String, &'a Domain<V>>;
 /// The domain of values that can be assigned to variables
 #[derive(Clone)]
@@ -71,10 +72,11 @@ impl<'a,V> Problem<'a, V> {
 
     /// Returns all possible Updates for next assignements, prepended with
     /// a Clear to ensure the variable is unset before when leaving the branch.
-    fn _assign_next(&self) -> Option<Vec<Assignment<'a,V>>> {
+    fn _push_updates(&self) -> Option<Vec<Assignment<'a,V>>> {
         // TODO: should be able to inject a choosing strategy
         if let Some((key,_)) = self.variables.iter().find(|(_, val)| val.is_none()) {
             let domain = self.domains.get(key).expect("No domain for variable !");
+            // Push a clear assignment first, just before going up the stack.
             let mut updates = vec![Assignment::Clear(key.clone())];
 
             if domain.values.is_empty() { panic!("No value in domain !"); }
@@ -96,13 +98,13 @@ impl<'a,V> Problem<'a, V> {
         return true;
     }
 
-    /// Visit all possible solutions, using a stack.
+    /// Visit all possible solutions, using a stack (DFS).
     pub fn solve_all(&mut self) -> Vec<Variables<'a,V>>
         where V: Clone + fmt::Debug
     {
         let mut solutions: Vec<Variables<V>> = vec![];
         let mut stack: Vec<Assignment<'a, V>> = vec![];
-        stack.append(&mut self._assign_next().unwrap());
+        stack.append(&mut self._push_updates().unwrap());
         loop {
             let node = stack.pop();
             if node.is_none() { break; };
@@ -111,7 +113,7 @@ impl<'a,V> Problem<'a, V> {
                     // Assign the variable and open new branches, if any.
                     *self.variables.get_mut(&key).unwrap() = Some(val);
                     // TODO: handle case of empty domain.values
-                    if let Some(mut nodes) = self._assign_next() {
+                    if let Some(mut nodes) = self._push_updates() {
                         stack.append(&mut nodes);
                     } else {
                         // Assignements are completed

web/html/index.html

@@ -20,7 +20,7 @@
     <h4 class="title">{{ items[active_view].title }}</h4>
     <h6 class="subtitle">{{ categories[items[active_view].category].name }}</h6>
     <p><strong>{{ items[active_view].ingredients }}</strong></p>
-    <button @click="deleteRecipe(active_view + 1)" class="button is-danger is-pulled-right">DELETE !</button>
+    <button @click="deleteRecipe(items[active_view].id)" class="button is-danger is-pulled-right">DELETE !</button>
   </div>
   </section>
   <!-- Category List View -->
@@ -75,9 +75,15 @@
       deleteRecipe: function(id) {
         fetch("/api/delete/" + id)
           .then((res) => res.json())
-          .then((data) => console.log("Deleted :" + data))
+          .then((data) => {
+            if (data === true) {
+              this.items.splice(this.active_view, 1);
+              this.closeActiveView();
+              console.log("Deleted :" + data);
+            } else {
+              console.log("Error deleting");
+            }})
           .catch((err) => console.error(err));
-        this.closeActiveView();
       },
       fetchRecipesList: function() {
         fetch("/api/list")

web/src/main.rs

@@ -40,7 +40,7 @@ mod api {
                 id: rec.id,
                 title: rec.title,
                 category: rec.category as i16,
-                ingredients: rec.ingredients,
+                ingredients: rec.ingredients.as_string(),
                 preparation: rec.preparation,
             }
         }