New Lua command proposal: !festival (#26)

This command enables the user to set the current zone's festival.
For example, you can toggle the Starlight festival in any of the starting cities.

Thanks, OTCompa!

USAGE.md

@@ -109,6 +109,7 @@ These special debug commands start with `!` and are custom to Kawari.
 * `!unlockaction <id>`: Unlock an action, for example: `1` for Return and `4` for Teleport.
 * `!equip <name>`: Forcefully equip an item, useful for bypassing class/job and other client restrictions. This will *overwrite* any item in that slot!
 * `!nudge <distance> <up/down (optional)>`: Teleport forward, back, up or down `distance` yalms. Specifying up or down will move the player up or down instead of forward or back. Examples: `!nudge 5 up` to move up 5 yalms, `!nudge 5` to move forward 5 yalms, `!nudge -5` to move backward 5 yalms.
+*`!festival <id1> <id2> <id3> <id4>`: Sets the festival in the current zone. Multiple festivals can be set together to create interesting effects.
 
 ### GM commands
 

resources/scripts/Global.lua

@@ -50,3 +50,4 @@ registerCommand("setpos", "commands/debug/SetPos.lua")
 registerCommand("classjob", "commands/debug/ClassJob.lua")
 registerCommand("setspeed", "commands/debug/SetSpeed.lua")
 registerCommand("nudge", "commands/debug/Nudge.lua")
+registerCommand("festival", "commands/debug/Festival.lua")

resources/scripts/commands/debug/Festival.lua

@@ -0,0 +1,35 @@
+-- A list of festival ids can be found in Hyperborea's source tree:
+-- https://github.com/kawaii/Hyperborea/blob/main/Hyperborea/festivals.yaml
+
+function onCommand(args, player)
+    local parts = split(args)
+    local argc = table.getn(parts)
+    local usage = "\nUsage: !festival <id1> <id2> <id3> <id4>"
+    local sender = "[festival] "
+
+    local id1 = tonumber(parts[1])
+    local id2 = tonumber(parts[2])
+    local id3 = tonumber(parts[3])
+    local id4 = tonumber(parts[4])
+
+    if not id1 then
+        player:send_message(sender.."At least one festival must be specified (for now, until the server has support for commands with no args)."..usage)
+        return
+    end
+
+    if not id2 then
+        id2 = 0
+    end
+
+    if not id3 then
+        id3 = 0
+    end
+
+    if not id4 then
+        id4 = 0
+    end
+
+    player:set_festival(id1, id2, id3, id4)
+    local message = string.format("Festival(s) changed to %s, %s, %s and %s.", id1, id2, id3, id4)
+    player:send_message(message)
+end

src/ipc/zone/actor_control.rs

@@ -73,7 +73,15 @@ pub enum ActorControlCategory {
     Flee {
         #[brw(pad_before = 2)] // padding
         speed: u16,
-    }
+    },
+    #[brw(magic=0x386u16)]
+    SetFestival {
+        #[brw(pad_before = 2)] // padding
+        festival1: u32, // Multiple festivals can be set at the same time.
+        festival2: u32,
+        festival3: u32,
+        festival4: u32,
+    },
 }
 
 #[binrw]

src/world/lua.rs

@@ -7,7 +7,7 @@ use crate::{
     },
     ipc::zone::{
         ActionEffect, DamageElement, DamageKind, DamageType, EffectKind, EventScene,
-        ServerZoneIpcData, ServerZoneIpcSegment, Warp,
+        ServerZoneIpcData, ServerZoneIpcSegment, Warp, ActorControlSelf, ActorControlCategory
     },
     opcodes::ServerZoneIpcType,
     packet::{PacketSegment, SegmentData, SegmentType},
@@ -104,6 +104,20 @@ impl LuaPlayer {
         self.create_segment_self(op_code, data);
     }
 
+    fn set_festival(&mut self, festival1: u32, festival2: u32, festival3: u32, festival4: u32) {
+        let op_code = ServerZoneIpcType::ActorControlSelf;
+        let data = ServerZoneIpcData::ActorControlSelf(ActorControlSelf {
+            category: ActorControlCategory::SetFestival {
+                festival1,
+                festival2,
+                festival3,
+                festival4
+            },
+        });
+
+        self.create_segment_self(op_code, data);
+    }
+
     fn change_territory(&mut self, zone_id: u16) {
         self.queued_tasks.push(Task::ChangeTerritory { zone_id });
     }
@@ -162,6 +176,13 @@ impl UserData for LuaPlayer {
                 Ok(())
             },
         );
+        methods.add_method_mut(
+            "set_festival",
+            |_, this, (festival1, festival2, festival3, festival4): (u32, u32, u32, u32)| {
+                this.set_festival(festival1, festival2, festival3, festival4);
+                Ok(())
+            },
+        );
         methods.add_method_mut("change_territory", |_, this, zone_id: u16| {
             this.change_territory(zone_id);
             Ok(())