Add server-wide and user-only federation controls (#133)

### Description

Completes #122

### Please confirm

- [x] I am the legal owner or represent the legal owner of all work submitted (including LLM-generated code, if any)
- [x] I consent to my changes being added to this FOSS project
- [x] I have confirmed that this does not add new errors or warnings with `utils/clippy.sh`
- [ ] This PR used LLMs to generate some or all of the code changes

Reviewed-on: https://git.ngram.ca/OpenJam/rc-servers/pulls/133

rc_core/src/persist/config/cubes_json.rs

@@ -8,7 +8,7 @@ use polariton::serdes::TypePrefix;
 
 use crate::persist::config::SelfValidator;
 
-use super::super::{MovementCategoryData, MovementData, Cube, ItemCategory, ItemTier, BattleConfig, Settings, ChatConfig, FactoryConfig, ItemShopConfig};
+use super::super::{MovementCategoryData, MovementData, Cube, ItemCategory, ItemTier, BattleConfig, Settings, ChatConfig, FactoryConfig, ItemShopConfig, FederationConfig};
 
 const CUBE_CONFIG_FILENAME: &str = "config.json";
 
@@ -22,6 +22,8 @@ pub struct CubeConfig {
     factory: FactoryConfig,
     shop: ItemShopConfig,
     settings: Settings,
+    #[serde(default = "super::super::default_federation")]
+    federation: FederationConfig,
 }
 
 impl CubeConfig {
@@ -623,7 +625,15 @@ impl <C: Clone + Send> super::ConfigProvider<C> for CubeConfig {
             factory: self.factory.redacted_clone(),
             shop: self.shop.clone(),
             settings: self.settings.redacted_clone(),
+            federation: self.federation.clone(),
         };
         serde_json::to_string(&redacted_self).expect("Failed to re-serialize config.json")
     }
+
+    fn federation(&self) -> Option<super::Federation> {
+        self.federation.enabled.then(|| super::Federation {
+            aliases: self.federation.aliases.clone(),
+            defederated: self.federation.defederated.clone(),
+        })
+    }
 }

rc_core/src/persist/config/mod.rs

@@ -2,7 +2,7 @@ mod cubes_json;
 pub use cubes_json::CubeConfig;
 
 mod traits;
-pub use traits::{ConfigProvider, DevMessageProvider, ServerConfig, GarageUpgrades, GarageUpgradeIncrement, ChatSystemConfig, GameEventSequence, GameEvents, GameRotationStrategy, GameEvent, GameMap, GameVisibility, GameType, SingleplayerConfig, VehicleInfo, VehicleDescriptor, QueueChangeMode, Point, Sphere, MapConfig, LinksConfig, FakePlayer, ClientEmulator, EnergyConfig, BattleArenaResolver, PitSettings, PitWinCondition, TeamDeathMatchSettings, ShopEntriesResolver, ShopAction, ShopGain, PromoCode, MultiplayerSettings, BattleArenaCrystalParams, VehicleValidators, TeamChoosers, FactoryConfig, PlatformConfig};
+pub use traits::{ConfigProvider, DevMessageProvider, ServerConfig, GarageUpgrades, GarageUpgradeIncrement, ChatSystemConfig, GameEventSequence, GameEvents, GameRotationStrategy, GameEvent, GameMap, GameVisibility, GameType, SingleplayerConfig, VehicleInfo, VehicleDescriptor, QueueChangeMode, Point, Sphere, MapConfig, LinksConfig, FakePlayer, ClientEmulator, EnergyConfig, BattleArenaResolver, PitSettings, PitWinCondition, TeamDeathMatchSettings, ShopEntriesResolver, ShopAction, ShopGain, PromoCode, MultiplayerSettings, BattleArenaCrystalParams, VehicleValidators, TeamChoosers, FactoryConfig, PlatformConfig, Federation};
 pub(super) use traits::RedactedClone;
 
 mod validation;

rc_core/src/persist/config/traits.rs

@@ -46,6 +46,8 @@ pub trait ConfigProvider<C: Clone> {
     fn garage_slot_limit(&self) -> i32;
     fn team_choosers(&self) -> TeamChoosers;
     fn redacted_json(&self) -> String;
+    /// None when federation is not enabled
+    fn federation(&self) -> Option<Federation>;
 }
 
 pub struct DevMessageProvider<C: Clone> {
@@ -579,3 +581,8 @@ pub struct PlatformConfig {
 pub trait RedactedClone {
     fn redacted_clone(&self) -> Self;
 }
+
+pub struct Federation {
+    pub aliases: std::collections::HashMap<String, String>,
+    pub defederated: Vec<String>,
+}