src/ship/map/enemy.rs

@@ -118,6 +118,7 @@ pub struct MapEnemy {
     pub dropped_item: bool,
     pub gave_exp: bool,
     pub shiny: bool,
+    pub stolen_exp: [u32; 4], // tracks total amount of exp stolen by each player
 }
 
 impl MapEnemy {
@@ -301,6 +302,7 @@ impl MapEnemy {
             gave_exp: false,
             player_hit: [false; 4],
             shiny: false,
+            stolen_exp: [0; 4],
         })
     }
 
@@ -313,6 +315,7 @@ impl MapEnemy {
             gave_exp: false,
             player_hit: [false; 4],
             shiny: false,
+            stolen_exp: [0; 4],
         }
     }
 
@@ -366,5 +369,9 @@ impl MapEnemy {
         }
         self
     }
+
+    pub fn steal_exp(&mut self, exp: u32, slot: usize) {
+        self.stolen_exp[slot] += exp
+    }
 }
 

src/ship/map/maps.rs

@@ -298,6 +298,10 @@ impl Maps {
         self.enemy_data[id].ok_or(MapsError::InvalidMonsterId(id))
     }
 
+    pub fn mut_enemy_by_id(&mut self, id: usize) -> Option<&mut MapEnemy> {
+        self.enemy_data[id].as_mut()
+    }
+
     pub fn object_by_id(&self, id: usize) -> Result<MapObject, MapsError> {
         self.object_data[id].ok_or(MapsError::InvalidObjectId(id))
     }

src/ship/packet/handler/message.rs

@@ -6,6 +6,7 @@ use crate::common::leveltable::CharacterLevelTable;
 use crate::entity::item::ItemDetail;
 use crate::entity::item::esweapon::{ESWeaponSpecial};
 use crate::entity::item::weapon::{WeaponSpecial};
+use crate::ship::map::MapsError;
 use crate::ship::ship::{SendShipPacket, ShipError, Rooms, Clients, ItemDropLocation};
 use crate::ship::location::{ClientLocation, ClientLocationError};
 use crate::ship::items::{ItemManager, ClientItemId, ItemManagerError};
@@ -402,8 +403,6 @@ where
     Ok(Box::new(None.into_iter()))
 }
 
-// TODO: restrict stealable exp to 100%
-// TODO: track stealable exp per client
 // TODO: convenience function for giving exp and checking levelups (un-duplicate code here and `request_exp`)
 // TODO: use real errors (Idunnoman)
 // TODO: create InventoryError::CannotGetItemHandle or something
@@ -427,84 +426,94 @@ where
         .as_mut()
         .ok_or(ShipError::InvalidRoom(room_id.0 as u32))?;
 
-    let monster = room.maps.enemy_by_id(expsteal.enemy_id as usize)?;
+    let monster = room.maps.mut_enemy_by_id(expsteal.enemy_id as usize).ok_or(MapsError::InvalidMonsterId(expsteal.enemy_id as usize))?;
     if monster.monster.is_boss() {
         Ok(Box::new(None.into_iter())) // should this be an error?
     } else {
-        let monster_stats = room.monster_stats.get(&monster.monster).ok_or(ShipError::UnknownMonster(monster.monster))?;
+            let monster_stats = room.monster_stats.get(&monster.monster).ok_or(ShipError::UnknownMonster(monster.monster))?;
 
-        let char_special_modifier: f32 = if client.character.char_class.is_android()  {
-            if room.mode.difficulty() == crate::ship::room::Difficulty::Ultimate {
-                0.3
+            let remaining_exp = monster_stats.exp - monster.stolen_exp[area_client.local_client.id() as usize];
+            if remaining_exp <= 0 {
+                Ok(Box::new(None.into_iter()))
+            } else {
+            let char_special_modifier: f32 = if client.character.char_class.is_android()  {
+                if room.mode.difficulty() == crate::ship::room::Difficulty::Ultimate {
+                    0.3
+                } else {
+                    0.0
+                }
             } else {
                 0.0
-            }
-        } else {
-            0.0
-        };
+            };
 
-        let equipped_weapon_handle = item_manager
-            .get_character_inventory_mut(&client.character)?
-            .get_equipped_weapon_handle()
-            .ok_or(ItemManagerError::CannotGetIndividualItem)?; 
+            let equipped_weapon_handle = item_manager
+                .get_character_inventory_mut(&client.character)?
+                .get_equipped_weapon_handle()
+                .ok_or(ItemManagerError::CannotGetIndividualItem)?; 
 
-        let equipped_weapon = &equipped_weapon_handle
-            .item()
-            .ok_or(ItemManagerError::Idunnoman)?
-            .individual()
-            .ok_or(ItemManagerError::Idunnoman)?.item;
+            let equipped_weapon = &equipped_weapon_handle
+                .item()
+                .ok_or(ItemManagerError::Idunnoman)?
+                .individual()
+                .ok_or(ItemManagerError::Idunnoman)?.item;
 
-        let special_exp_ratio: f32 = {
-            match equipped_weapon {
-                ItemDetail::Weapon(weapon) => match weapon.special {
-                    Some(WeaponSpecial::Masters) => 0.08,
-                    Some(WeaponSpecial::Lords) => 0.10,
-                    Some(WeaponSpecial::Kings) => 0.12,
-                    _ => 0.0, // TODO: error - stealing exp with wrong special
-                },
-                ItemDetail::ESWeapon(esweapon) => match esweapon.special {
-                    Some(ESWeaponSpecial::Kings) => 0.12,
-                    _ => 0.0, // TODO: error - stealing exp with wrong special
-                },
-                _ => 0.0, // TODO: error - stealing exp without a weapon!!
-            }
-        };
+            let special_exp_ratio: f32 = {
+                match equipped_weapon {
+                    ItemDetail::Weapon(weapon) => match weapon.special {
+                        Some(WeaponSpecial::Masters) => 0.08,
+                        Some(WeaponSpecial::Lords) => 0.10,
+                        Some(WeaponSpecial::Kings) => 0.12,
+                        _ => 0.0, // TODO: error - stealing exp with wrong special
+                    },
+                    ItemDetail::ESWeapon(esweapon) => match esweapon.special {
+                        Some(ESWeaponSpecial::Kings) => 0.12,
+                        _ => 0.0, // TODO: error - stealing exp with wrong special
+                    },
+                    _ => 0.0, // TODO: error - stealing exp without a weapon!!
+                }
+            };
 
-        let weapon_special_reduction: f32 = {
-            match equipped_weapon {
-                ItemDetail::Weapon(weapon) => weapon.weapon.special_penalty(),
-                ItemDetail::ESWeapon(_esweapon) => 0.0,
-                _ => 0.0,
-            }
-        };
+            let weapon_special_reduction: f32 = {
+                match equipped_weapon {
+                    ItemDetail::Weapon(weapon) => weapon.weapon.special_penalty(),
+                    ItemDetail::ESWeapon(_esweapon) => 0.0,
+                    _ => 1.0, // unreachable?
+                }
+            };
 
-        let exp_gain = ((monster_stats.exp as f32 * (char_special_modifier + special_exp_ratio)).clamp(1.0, 80.0) * (1.0 - weapon_special_reduction)) as u32;
+            let exp_earned = std::cmp::min(
+                ((monster_stats.exp as f32 * (char_special_modifier + special_exp_ratio)).clamp(1.0, 80.0) * (1.0 - weapon_special_reduction)) as u32,
+                remaining_exp);
 
-        let clients_in_area = client_location.get_clients_in_room(room_id).map_err(|err| -> ClientLocationError { err.into() })?;
-        let gain_exp_pkt = builder::message::character_gained_exp(area_client, exp_gain);
-        let mut exp_pkts: Box<dyn Iterator<Item = _> + Send> = Box::new(clients_in_area.clone().into_iter()
-            .map(move |c| {
-                (c.client, SendShipPacket::Message(Message::new(GameMessage::GiveCharacterExp(gain_exp_pkt.clone()))))
-            }));
+            monster.steal_exp(exp_earned, area_client.local_client.id() as usize);
+            println!("monster info: {:?}", monster);
 
-        let before_level = level_table.get_level_from_exp(client.character.char_class, client.character.exp);
-        let after_level = level_table.get_level_from_exp(client.character.char_class, client.character.exp + exp_gain);
-        let level_up = before_level != after_level;
-
-        if level_up {
-            let (_, before_stats) = level_table.get_stats_from_exp(client.character.char_class, client.character.exp);
-            let (after_level, after_stats) = level_table.get_stats_from_exp(client.character.char_class, client.character.exp + exp_gain);
-
-            let level_up_pkt = builder::message::character_leveled_up(area_client, after_level, before_stats, after_stats);
-            exp_pkts = Box::new(exp_pkts.chain(clients_in_area.into_iter()
+            let clients_in_area = client_location.get_clients_in_room(room_id).map_err(|err| -> ClientLocationError { err.into() })?;
+            let gain_exp_pkt = builder::message::character_gained_exp(area_client, exp_earned);
+            let mut exp_pkts: Box<dyn Iterator<Item = _> + Send> = Box::new(clients_in_area.clone().into_iter()
                 .map(move |c| {
-                    (c.client, SendShipPacket::Message(Message::new(GameMessage::PlayerLevelUp(level_up_pkt.clone()))))
-                })))
+                    (c.client, SendShipPacket::Message(Message::new(GameMessage::GiveCharacterExp(gain_exp_pkt.clone()))))
+                }));
+
+            let before_level = level_table.get_level_from_exp(client.character.char_class, client.character.exp);
+            let after_level = level_table.get_level_from_exp(client.character.char_class, client.character.exp + exp_earned);
+            let level_up = before_level != after_level;
+
+            if level_up {
+                let (_, before_stats) = level_table.get_stats_from_exp(client.character.char_class, client.character.exp);
+                let (after_level, after_stats) = level_table.get_stats_from_exp(client.character.char_class, client.character.exp + exp_earned);
+
+                let level_up_pkt = builder::message::character_leveled_up(area_client, after_level, before_stats, after_stats);
+                exp_pkts = Box::new(exp_pkts.chain(clients_in_area.into_iter()
+                    .map(move |c| {
+                        (c.client, SendShipPacket::Message(Message::new(GameMessage::PlayerLevelUp(level_up_pkt.clone()))))
+                    })))
+            }
+
+            client.character.exp += exp_earned;
+            entity_gateway.save_character(&client.character).await?;
+
+            Ok(exp_pkts)
         }
-
-        client.character.exp += exp_gain;
-        entity_gateway.save_character(&client.character).await?;
-
-        Ok(exp_pkts)
     }
 }

tests/test_exp_gain.rs

@@ -448,7 +448,7 @@ async fn test_exp_steal_android_boost_in_ultimate() {
 
 #[async_std::test]
 async fn test_exp_steal_no_android_boost_in_vhard() {
-        let mut entity_gateway = InMemoryGateway::default();
+    let mut entity_gateway = InMemoryGateway::default();
 
     let (_user1, mut char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
     char1.exp = 80000000;
@@ -735,11 +735,183 @@ async fn test_cannot_steal_exp_from_boss() {
 
 #[async_std::test]
 async fn test_exp_steal_doesnt_exceed_100p() {
-    assert!(false)
+    let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+    
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room(&mut ship, ClientId(1), "room", "").await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    for _ in 0..10 {
+        ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+            client: 0,
+            target: 0,
+            client2: enemy_id as u8,
+            target2: 16,
+            enemy_id: enemy_id as u16,
+        })))).await.unwrap().for_each(drop);
+    }
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    assert!(c1.character.exp == 5);
 }
 
 #[async_std::test]
 async fn test_each_client_can_steal_full_exp_from_same_enemy() {
-    assert!(false)
+    let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+    let (_user2, char2) = new_user_character(&mut entity_gateway, "a2", "a", 1).await;
+    entity_gateway.save_character(&char1).await.unwrap();
+    entity_gateway.save_character(&char2).await.unwrap();
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut p2_inv = Vec::new();
+    p2_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p2_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char2.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char2.id, &item::InventoryEntity::new(p2_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room_with_difficulty(&mut ship, ClientId(1), "room", "", Difficulty::Normal).await;
+    log_in_char(&mut ship, ClientId(2), "a2", "a").await;
+    join_lobby(&mut ship, ClientId(2)).await;
+    join_room(&mut ship, ClientId(2), 0).await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    for _ in 0..10 {
+        ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+            client: 0,
+            target: 0,
+            client2: enemy_id as u8,
+            target2: 16,
+            enemy_id: enemy_id as u16,
+        })))).await.unwrap().for_each(drop);
+
+        ship.handle(ClientId(2), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+            client: 0,
+            target: 0,
+            client2: enemy_id as u8,
+            target2: 16,
+            enemy_id: enemy_id as u16,
+        })))).await.unwrap().for_each(drop);
+    }
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    let c2 = ship.clients.get(&ClientId(2)).unwrap();
+    println!("c1 exp: {:?}, c2 exp: {:?}", c1.character.exp, c2.character.exp);
+    assert!(c1.character.exp == 5);
+    assert!(c2.character.exp == 5);
+
 }