Adds basic vuejs functionnality, implements RecipeCategory custom field

cookbook/src/models.rs

@@ -2,11 +2,66 @@ use super::schema::recipes;
 use super::schema::ingredients;
 use super::diesel::prelude::*;
 
+pub mod fields {
+    use diesel::{
+        backend::Backend,
+        sqlite::Sqlite,
+        sql_types::SmallInt,
+        deserialize::{self, FromSql},
+        serialize::{self, Output, ToSql},
+    };
+    use std::io::Write;
+
+    /// All recipes have a single associated category
+    /// representing the main use of the resulting preparation.
+    ///
+    /// It is stored as Integer
+    #[derive(Debug, Clone, FromSqlRow, AsExpression)]
+    #[repr(i16)]
+    pub enum RecipeCategory {
+        Breakfast = 0,
+        Starter = 1,
+        MainCourse = 2,
+        Dessert = 3
+    }
+
+    impl RecipeCategory {
+        fn from_id(id: i16) -> Option<RecipeCategory> {
+            match id {
+                0 => Some(RecipeCategory::Breakfast),
+                1 => Some(RecipeCategory::Starter),
+                2 => Some(RecipeCategory::MainCourse),
+                3 => Some(RecipeCategory::Dessert),
+                _ => None,
+            }
+        }
+    }
+
+    impl FromSql<SmallInt, Sqlite> for RecipeCategory {
+        fn from_sql(bytes: Option<&<Sqlite as Backend>::RawValue>) -> deserialize::Result<Self> {
+            if let Some(result) = RecipeCategory::from_id(
+                <i16 as FromSql<SmallInt,Sqlite>>::from_sql(bytes)?)
+            { Ok(result) }
+            else { Err("Invalid RecipeCategory id".into()) }
+        }
+    }
+
+    impl ToSql<SmallInt, Sqlite> for RecipeCategory {
+        fn to_sql<W: Write>(&self, out: &mut Output<W, Sqlite>) -> serialize::Result {
+            let as_int = self.clone() as i16;
+            <i16 as ToSql<SmallInt, Sqlite>>::to_sql(&as_int, out)
+        }
+    }
+
+}
+
+
+/// Data for a recipe stored in DB
 #[derive(Debug, Clone, Queryable)]
 pub struct Recipe {
     pub id: i32,
     pub title: String,
-    pub category: i32,
+    pub category: fields::RecipeCategory,
     pub ingredients: String,
     pub preparation: String,
 }
@@ -15,13 +70,13 @@ pub struct Recipe {
 #[table_name="recipes"]
 pub struct NewRecipe<'a> {
     pub title: &'a str,
-    pub category: i32,
+    pub category: i16,
     pub ingredients: &'a str,
     pub preparation: &'a str,
 }
 
 impl<'a> NewRecipe<'a> {
-    pub fn new(title: &'a str, category: i32, ingredients: &'a str, preparation: &'a str) -> Self {
+    pub fn new(title: &'a str, category: i16, ingredients: &'a str, preparation: &'a str) -> Self {
         NewRecipe{
             title,
             category,