moves API logic inside its own module

lootalot_db/src/lib.rs

@@ -19,8 +19,8 @@ mod schema;
 
 pub use models::{
     claim::{Claim, Claims},
-    item::{Item, LootManager},
+    item::{Item, LootManager, Inventory},
-    player::{Player, Players, Wealth},
+    player::{Player, Wealth, Players, AsPlayer},
 };
 
 /// The connection used
@@ -29,184 +29,66 @@ pub type DbConnection = SqliteConnection;
 pub type Pool = r2d2::Pool<ConnectionManager<DbConnection>>;
 /// The result of a query on DB
 pub type QueryResult<T> = Result<T, diesel::result::Error>;
-/// The result of an action provided by DbApi
-pub type ActionResult<R> = Result<R, diesel::result::Error>;
 
-#[derive(Serialize, Deserialize, Debug)]
+/// Sets up a connection pool and returns it.
-pub enum Update {
+/// Uses the DATABASE_URL environment variable (must be set)
-    Wealth(Wealth),
+pub fn create_pool() -> Pool {
-    ItemAdded(Item),
+    let connspec = std::env::var("DATABASE_URL").expect("DATABASE_URL");
-    ItemRemoved(Item),
+    dbg!(&connspec);
-    ClaimAdded(Claim),
+    let manager = ConnectionManager::<DbConnection>::new(connspec);
-    ClaimRemoved(Claim),
+    r2d2::Pool::builder()
+        .build(manager)
+        .expect("Failed to create pool.")
 }
 
-#[derive(Serialize, Deserialize, Debug)]
-pub enum Value {
-    Item(Item),
-    Claim(Claim),
-    ItemList(Vec<Item>),
-    ClaimList(Vec<Claim>),
-    PlayerList(Vec<Player>),
-}
 
-#[derive(Serialize, Deserialize, Debug, Default)]
+/// Sells a single item inside a transaction
-pub struct ApiResponse {
+///
-    pub value: Option<Value>,         // The value requested, if any
+/// # Returns
-    pub notify: Option<String>,       // A text to notify user, if relevant
+/// The deleted entity and the updated Wealth (as a difference from previous value)
-    pub updates: Option<Vec<Update>>, // A list of updates, if any
+pub fn sell_item_transaction(
-    pub errors: Option<String>,       // A text describing errors, if any
-}
-
-impl ApiResponse {
-    fn push_update(&mut self, update: Update) {
-        if let Some(v) = self.updates.as_mut() {
-            v.push(update);
-        } else {
-            self.updates = Some(vec![update]);
-        }
-    }
-
-    fn push_error<S: Into<String>>(&mut self, error: S) {
-        if let Some(errors) = self.errors.as_mut() {
-            *errors = format!("{}\n{}", errors, error.into());
-        } else {
-            self.errors = Some(error.into())
-        }
-    }
-
-    fn set_value(&mut self, value: Value) {
-        self.value = Some(value);
-    }
-
-    fn notifiy<S: Into<String>>(&mut self, text: S) {
-        self.notify = Some(text.into());
-    }
-}
-
-pub enum ApiError {
-    DieselError(diesel::result::Error),
-    InvalidAction(String),
-}
-
-pub enum ApiActions {
-    FetchPlayers,
-    FetchInventory,
-    // Player actions
-    FetchLoot(i32),
-    UpdateWealth(i32, f32),
-    BuyItems(i32, Vec<(i32, Option<f32>)>),
-    SellItems(i32, Vec<(i32, Option<f32>)>),
-    ClaimItem(i32, i32),
-    UnclaimItem(i32, i32),
-    // Group actions
-    AddLoot(Vec<Item>),
-}
-
-pub enum AdminActions {
-    AddPlayer(String, f32),
-    //AddInventoryItem(pub String, pub i32),
-    ResolveClaims,
-    //SetClaimsTimeout(pub i32),
-}
-
-pub fn execute(
     conn: &DbConnection,
-    query: ApiActions,
+    id: i32,
-) -> Result<ApiResponse, diesel::result::Error> {
+    loot_id: i32,
-    let mut response = ApiResponse::default();
+    price_mod: Option<f32>,
-    match query {
+) -> QueryResult<(Item, Wealth)> {
-        ApiActions::FetchPlayers => {
+    conn.transaction(|| {
-            response.set_value(Value::PlayerList(models::player::Players(conn).all()?));
+        let deleted = LootManager(conn, id)
+            .remove(loot_id)?;
+        let mut sell_value =
+            deleted.base_price as f32 / 2.0;
+        if let Some(modifier) = price_mod {
+            sell_value *= modifier;
         }
-        ApiActions::FetchInventory => {
+        let wealth = AsPlayer(conn, id)
-            response.set_value(Value::ItemList(models::item::Inventory(conn).all()?));
+            .update_wealth(sell_value)?;
-        }
+        Ok((deleted, wealth))
-        ApiActions::FetchLoot(id) => {
+    })
-            response.set_value(Value::ItemList(models::item::LootManager(conn, id).all()?));
+}
-        }
+
-        ApiActions::UpdateWealth(id, amount) => {
+/// Buys a single item, copied from inventory.
-            response.push_update(Update::Wealth(
+/// Runs inside a transaction
-                models::player::AsPlayer(conn, id).update_wealth(amount)?,
+///
-            ));
+/// # Returns
-        }
+/// The created entity and the updated Wealth (as a difference from previous value)
-        ApiActions::BuyItems(id, params) => {
+pub fn buy_item_from_inventory(
-            let mut cumulated_diff: Vec<Wealth> = Vec::with_capacity(params.len());
+    conn: &DbConnection,
-            let mut added_items: Vec<models::Item> = Vec::with_capacity(params.len());
+    id: i32,
-            for (item_id, price_mod) in params.into_iter() {
+    item_id: i32,
-                // Use a transaction to avoid incoherant state in case of error
+    price_mod: Option<f32>,
-                if let Ok((item, diff)) = conn.transaction(|| {
+) -> QueryResult<(Item, Wealth)> {
-                    // Find item in inventory
+    conn.transaction(|| {
-                    let item = models::item::Inventory(conn).find(item_id)?;
+        // Find item in inventory
-                    let new_item = models::item::LootManager(conn, id).add_from(&item)?;
+        let item = Inventory(conn).find(item_id)?;
-                    let sell_price = match price_mod {
+        let new_item = LootManager(conn, id).add_from(&item)?;
-                        Some(modifier) => item.base_price as f32 * modifier,
+        let sell_price = match price_mod {
-                        None => item.base_price as f32,
+            Some(modifier) => item.base_price as f32 * modifier,
-                    };
+            None => item.base_price as f32,
-                    models::player::AsPlayer(conn, id)
+        };
-                        .update_wealth(-sell_price)
+        AsPlayer(conn, id)
-                        .map(|diff| (new_item, diff))
+            .update_wealth(-sell_price)
-                }) {
+            .map(|diff| (new_item, diff))
-                    cumulated_diff.push(diff);
+    })
-                    response.push_update(Update::ItemAdded(item));
-                } else {
-                    response.push_error(format!("Error adding {}", item_id));
-                }
-            }
-            let all_diff = cumulated_diff
-                .into_iter()
-                .fold(Wealth::from_gp(0.0), |sum, diff| Wealth {
-                    cp: sum.cp + diff.cp,
-                    sp: sum.sp + diff.sp,
-                    gp: sum.gp + diff.gp,
-                    pp: sum.pp + diff.pp,
-                });
-            response.push_update(Update::Wealth(all_diff));
-        }
-        ApiActions::SellItems(id, params) => {
-            let mut all_results: Vec<Wealth> = Vec::with_capacity(params.len());
-            for (loot_id, price_mod) in params.into_iter() {
-                let res = conn.transaction(|| {
-                    let deleted = models::item::LootManager(conn, id).remove(loot_id)?;
-                    let mut sell_value = deleted.base_price as f32 / 2.0;
-                    if let Some(modifier) = price_mod {
-                        sell_value *= modifier;
-                    }
-                    models::player::AsPlayer(conn, id)
-                        .update_wealth(sell_value)
-                        .map(|diff| (deleted, diff))
-                });
-                if let Ok((deleted, diff)) = res {
-                    all_results.push(diff);
-                    response.push_update(Update::ItemRemoved(deleted));
-                } else {
-                    response.push_error(format!("Error selling {}", loot_id));
-                }
-            }
-            let wealth = all_results
-                .into_iter()
-                .fold(Wealth::from_gp(0.0), |sum, diff| Wealth {
-                    cp: sum.cp + diff.cp,
-                    sp: sum.sp + diff.sp,
-                    gp: sum.gp + diff.gp,
-                    pp: sum.pp + diff.pp,
-                });
-            response.push_update(Update::Wealth(wealth));
-        }
-        ApiActions::ClaimItem(id, item) => {
-            response.push_update(Update::ClaimAdded(
-                models::claim::Claims(conn).add(id, item)?,
-            ));
-        }
-        ApiActions::UnclaimItem(id, item) => {
-            response.push_update(Update::ClaimRemoved(
-                models::claim::Claims(conn).remove(id, item)?,
-            ));
-        }
-        // Group actions
-        ApiActions::AddLoot(items) => {}
-    }
-    Ok(response)
 }
 
 /// Fetch all existing claims
@@ -238,16 +120,6 @@ pub fn resolve_claims(conn: &DbConnection) -> QueryResult<()> {
     Ok(())
 }
 
-/// Sets up a connection pool and returns it.
-/// Uses the DATABASE_URL environment variable (must be set)
-pub fn create_pool() -> Pool {
-    let connspec = std::env::var("DATABASE_URL").expect("DATABASE_URL");
-    dbg!(&connspec);
-    let manager = ConnectionManager::<DbConnection>::new(connspec);
-    r2d2::Pool::builder()
-        .build(manager)
-        .expect("Failed to create pool.")
-}
 
 #[cfg(none)]
 mod tests_old {

lootalot_db/src/models/player.rs

@@ -132,6 +132,21 @@ impl Wealth {
     }
 }
 
+use std::ops::Add;
+
+impl Add for Wealth {
+    type Output = Self;
+
+    fn add(self, other: Self) -> Self {
+        Wealth {
+            cp: self.cp + other.cp,
+            sp: self.sp + other.sp,
+            gp: self.gp + other.gp,
+            pp: self.pp + other.pp
+        }
+    }
+}
+
 /// Representation of a new player record
 #[derive(Insertable)]
 #[table_name = "players"]

src/api.rs

@@ -0,0 +1,166 @@
+use lootalot_db::{self as db, DbConnection, QueryResult};
+
+/// Every possible update which can happen during a query
+#[derive(Serialize, Deserialize, Debug)]
+pub enum Update {
+    Wealth(db::Wealth),
+    ItemAdded(db::Item),
+    ItemRemoved(db::Item),
+    ClaimAdded(db::Claim),
+    ClaimRemoved(db::Claim),
+}
+
+/// Every value which can be queried
+#[derive(Serialize, Deserialize, Debug)]
+pub enum Value {
+    Item(db::Item),
+    Claim(db::Claim),
+    ItemList(Vec<db::Item>),
+    ClaimList(Vec<db::Claim>),
+    PlayerList(Vec<db::Player>),
+}
+
+/// A generic response for all queries
+#[derive(Serialize, Deserialize, Debug, Default)]
+pub struct ApiResponse {
+    /// The value requested, if any
+    pub value: Option<Value>,
+    /// A text to notify user, if relevant
+    pub notification: Option<String>,
+    /// A list of updates, if any
+    pub updates: Option<Vec<Update>>,
+    /// A text describing errors, if any
+    pub errors: Option<String>,
+}
+
+impl ApiResponse {
+    fn push_update(&mut self, update: Update) {
+        if let Some(v) = self.updates.as_mut() {
+            v.push(update);
+        } else {
+            self.updates = Some(vec![update]);
+        }
+    }
+
+    fn push_error<S: Into<String>>(&mut self, error: S) {
+        if let Some(errors) = self.errors.as_mut() {
+            *errors = format!("{}\n{}", errors, error.into());
+        } else {
+            self.errors = Some(error.into())
+        }
+    }
+
+    fn set_value(&mut self, value: Value) {
+        self.value = Some(value);
+    }
+
+    fn notify<S: Into<String>>(&mut self, text: S) {
+        self.notification = Some(text.into());
+    }
+}
+
+pub enum ApiError {
+    DieselError(diesel::result::Error),
+    InvalidAction(String),
+}
+
+/// Every allowed queries on the database
+pub enum ApiActions {
+    FetchPlayers,
+    FetchInventory,
+    FetchClaims,
+    // Player actions
+    FetchLoot(i32),
+    UpdateWealth(i32, f32),
+    BuyItems(i32, Vec<(i32, Option<f32>)>),
+    SellItems(i32, Vec<(i32, Option<f32>)>),
+    ClaimItem(i32, i32),
+    UnclaimItem(i32, i32),
+    // Group actions
+    AddLoot(Vec<db::Item>),
+}
+
+pub enum AdminActions {
+    AddPlayer(String, f32),
+    //AddInventoryItem(pub String, pub i32),
+    ResolveClaims,
+    //SetClaimsTimeout(pub i32),
+}
+
+pub fn execute(
+    conn: &DbConnection,
+    query: ApiActions,
+) -> Result<ApiResponse, diesel::result::Error> {
+    let mut response = ApiResponse::default();
+    match query {
+        ApiActions::FetchPlayers => {
+            response.set_value(Value::PlayerList(db::Players(conn).all()?));
+        }
+        ApiActions::FetchInventory => {
+            response.set_value(Value::ItemList(db::Inventory(conn).all()?));
+        }
+        ApiActions::FetchClaims => {
+            response.set_value(Value::ClaimList(db::fetch_claims(conn)?));
+        }
+        ApiActions::FetchLoot(id) => {
+            response.set_value(Value::ItemList(db::LootManager(conn, id).all()?));
+        }
+        ApiActions::UpdateWealth(id, amount) => {
+            response.push_update(Update::Wealth(
+                db::AsPlayer(conn, id).update_wealth(amount)?,
+            ));
+        }
+        ApiActions::BuyItems(id, params) => {
+            let mut cumulated_diff: Vec<db::Wealth> = Vec::with_capacity(params.len());
+            let mut added_items: u16 = 0;
+            for (item_id, price_mod) in params.into_iter() {
+                // Use a transaction to avoid incoherant state in case of error
+                if let Ok((item, diff)) = db::buy_item_from_inventory(conn, id, item_id, price_mod) {
+                    cumulated_diff.push(diff);
+                    response.push_update(Update::ItemAdded(item));
+                    added_items += 1;
+                } else {
+                    response.push_error(format!("Error adding {}", item_id));
+                }
+            }
+            response.notify(format!("Added {} items", added_items));
+            response.push_update(Update::Wealth(
+                cumulated_diff
+                    .into_iter()
+                    .fold(db::Wealth::from_gp(0.0), |acc, i| acc + i),
+            ));
+        }
+        ApiActions::SellItems(id, params) => {
+            let mut all_results: Vec<db::Wealth> = Vec::with_capacity(params.len());
+            let mut sold_items: u16 = 0;
+            for (loot_id, price_mod) in params.into_iter() {
+                if let Ok((deleted, diff)) = db::sell_item_transaction(conn, id, loot_id, price_mod) {
+                    all_results.push(diff);
+                    response.push_update(Update::ItemRemoved(deleted));
+                    sold_items += 1;
+                } else {
+                    response.push_error(format!("Error selling {}", loot_id));
+                }
+            }
+            response.notify(format!("Sold {} items", sold_items));
+            response.push_update(Update::Wealth(
+                all_results
+                    .into_iter()
+                    .fold(db::Wealth::from_gp(0.0), |acc, i| acc + i),
+            ));
+        }
+        ApiActions::ClaimItem(id, item) => {
+            response.push_update(Update::ClaimAdded(
+                db::Claims(conn).add(id, item)?,
+            ));
+        }
+        ApiActions::UnclaimItem(id, item) => {
+            response.push_update(Update::ClaimRemoved(
+                db::Claims(conn).remove(id, item)?,
+            ));
+        }
+        // Group actions
+        ApiActions::AddLoot(items) => {}
+    }
+    Ok(response)
+}

src/main.rs

@@ -2,9 +2,10 @@ extern crate actix_web;
 extern crate dotenv;
 extern crate env_logger;
 extern crate lootalot_db;
-extern crate serde;
+#[macro_use] extern crate serde;
 
 mod server;
+mod api;
 
 fn main() {
     std::env::set_var("RUST_LOG", "actix_web=info");

src/server.rs

@@ -5,6 +5,7 @@ use futures::Future;
 use std::env;
 
 use lootalot_db as db;
+use crate::api;
 
 type AppPool = web::Data<db::Pool>;
 type PlayerId = web::Path<i32>;
@@ -14,11 +15,11 @@ type ItemListWithMods = web::Json<Vec<(i32, Option<f32>)>>;
 /// Wraps call to the database query and convert its result as a async HttpResponse
 pub fn db_call(
     pool: AppPool,
-    query: db::ApiActions,
+    query: api::ApiActions,
 ) -> impl Future<Item = HttpResponse, Error = Error>
 {
     let conn = pool.get().unwrap();
-    web::block(move || db::execute(&conn, query)).then(|res| match res {
+    web::block(move || api::execute(&conn, query)).then(|res| match res {
         Ok(r) => HttpResponse::Ok().json(r),
         Err(e) => {
             dbg!(&e);
@@ -28,13 +29,14 @@ pub fn db_call(
 }
 
 fn configure_app(config: &mut web::ServiceConfig) {
+    use api::ApiActions as Q;
     config.service(
         web::scope("/api")
             .service(
                 web::scope("/players")
                     .service(
                         web::resource("/").route(
-                            web::get().to_async(|pool| db_call(pool, db::ApiActions::FetchPlayers)),
+                            web::get().to_async(|pool| db_call(pool, Q::FetchPlayers)),
                         ), //.route(web::post().to_async(endpoints::new_player))
                     ) // List of players
                     .service(
@@ -45,14 +47,14 @@ fn configure_app(config: &mut web::ServiceConfig) {
                                     //.route(web::get().to_async(endpoints::player_claims))
                                     .route(web::put().to_async(
                                         |pool, (player, data): (PlayerId, ItemId)| {
-                                            db_call(pool, db::ApiActions::ClaimItem(*player, *data))
+                                            db_call(pool, Q::ClaimItem(*player, *data))
                                         },
                                     ))
                                     .route(web::delete().to_async(
                                         |pool, (player, data): (PlayerId, ItemId)| {
                                             db_call(
                                                 pool,
-                                                db::ApiActions::UnclaimItem(*player, *data),
+                                                Q::UnclaimItem(*player, *data),
                                             )
                                         },
                                     )),
@@ -64,7 +66,7 @@ fn configure_app(config: &mut web::ServiceConfig) {
                                         |pool, (player, data): (PlayerId, web::Json<f32>)| {
                                             db_call(
                                                 pool,
-                                                db::ApiActions::UpdateWealth(*player, *data),
+                                                Q::UpdateWealth(*player, *data),
                                             )
                                         },
                                     )),
@@ -72,26 +74,26 @@ fn configure_app(config: &mut web::ServiceConfig) {
                             .service(
                                 web::resource("/loot")
                                     .route(web::get().to_async(|pool, player: PlayerId| {
-                                        db_call(pool, db::ApiActions::FetchLoot(*player))
+                                        db_call(pool, Q::FetchLoot(*player))
                                     }))
                                     .route(web::put().to_async(
                                         move |pool, (player, data): (PlayerId, ItemListWithMods)| {
-                                            db_call(pool, db::ApiActions::BuyItems(*player, data.into_inner()))
+                                            db_call(pool, Q::BuyItems(*player, data.into_inner()))
                                         },
                                     ))
                                     .route(web::delete().to_async(
                                         move |pool, (player, data): (PlayerId, ItemListWithMods)| {
-                                            db_call(pool, db::ApiActions::SellItems(*player, data.into_inner()))
+                                            db_call(pool, Q::SellItems(*player, data.into_inner()))
                                         },
                                     )),
                             ),
                     ),
             )
-            //.route("/claims", web::get().to_async(endpoints::player_claims))
+            .route("/claims", web::get().to_async(|pool| db_call(pool, Q::FetchClaims)))
             .route(
                 "/items",
                 web::get()
-                    .to_async(move |pool: AppPool| db_call(pool, db::ApiActions::FetchInventory)),
+                    .to_async(move |pool: AppPool| db_call(pool, Q::FetchInventory)),
             ),
     );
 }