keeps working on design, updates doc comments

lootalot_db/src/models/item.rs

@@ -1,6 +1,15 @@
 use diesel::prelude::*;
 use diesel::dsl::{Eq, Filter, Select};
 use crate::schema::{looted, items};
+use crate::DbConnection;
+
+type ItemColumns = ( looted::id, looted::name, looted::base_price, );
+type OwnedBy = Select<OwnedLoot, ItemColumns>;
+const ITEM_COLUMNS: ItemColumns = ( looted::id, looted::name, looted::base_price, );
+
+/// New type to handle the inventory (items table)
+/// This will be used to reduce confusion with looted items.
+struct InventoryItem(Item);
 
 /// Represents a unique item in inventory
 ///
@@ -14,22 +23,7 @@ pub struct Item {
     base_price: i32,
 }
 
-type ItemColumns = ( looted::id, looted::name, looted::base_price, );
-type OwnedBy = Select<OwnedLoot, ItemColumns>;
-const ITEM_COLUMNS: ItemColumns = ( looted::id, looted::name, looted::base_price, );
-
 impl Item {
-    /// Insert this item inside the Looted table.
-    ///
-    /// This adds a copy of the item into the group chest,
-    /// to be claimed by players or sold.
-    /// Returns the id of the looted item (differs from the original id)
-    pub fn to_looted(self) -> Result<i32, ()>{
-        // Copy data inside a new Loot
-        // Set the owner id to 0 (group)
-        Err(())
-    }
-
     /// Public proxy for Loot::owned_by that selects only Item fields
     pub fn owned_by(player: i32) -> OwnedBy {
         Loot::owned_by(player)
@@ -37,6 +31,9 @@ impl Item {
     }
 }
 
+type WithOwner = Eq<looted::owner_id, i32>;
+type OwnedLoot = Filter<looted::table, WithOwner>;
+
 /// Represents an item that has been looted
 #[derive(Debug, Queryable, Serialize)]
 struct Loot {
@@ -46,8 +43,23 @@ struct Loot {
     owner: i32,
 }
 
-type WithOwner = Eq<looted::owner_id, i32>;
+/// An item being looted or bought.
-type OwnedLoot = Filter<looted::table, WithOwner>;
+///
+/// The owner is set to 0 in case of looting,
+/// to the id of buying player otherwise.
+#[derive(Insertable)]
+#[table_name = "looted"]
+struct NewLoot<'a> {
+    name: &'a str,
+    base_price: i32,
+    owner_id: i32,
+}
+
+impl<'a> NewLoot<'a> {
+    fn insert(&self, conn: &DbConnection) -> QueryResult<i32> {
+        Ok(0)
+    }
+}
 
 impl Loot {
     /// A filter on Loot that is owned by given player
@@ -55,10 +67,30 @@ impl Loot {
         looted::table
             .filter(looted::owner_id.eq(id))
     }
+    /// Loot an item, adding it to the group chest
+    fn loot(name: &str, base_price: i32) -> Result<i32, ()> {
+        let loot = NewLoot{ name, base_price, owner_id: 0 };
+        // Insert into table
+        // Retrieve id of created loot
+        let loot_id = 0;
+        Ok(loot_id)
+    }
     /// Delete the item, returning the gained wealth
     fn sell(_modifier: i8) -> Result<i32, ()> {
         // Calculate sell value : base_value / 2 * modifier
         // Delete recording of loot
         Err(())
     }
+    fn buy(buyer_id: i32, item_desc: (&str, i32)) -> Result<i32, ()> {
+        let loot = NewLoot{
+            name: item_desc.0,
+            base_price: item_desc.1,
+            owner_id: buyer_id
+        };
+        // Insert into table
+        // Retrieve id of created loot;
+
+        // Withdraw value from player wealth.
+        Ok(item_desc.1)
+    }
 }