From 78b207c925554d45de804c8e85efa23bbc32d8d4 Mon Sep 17 00:00:00 2001
From: Eltrac <hi@guhub.cn>
Date: Fri, 14 Mar 2025 08:54:33 +0800
Subject: refactor: separate map generation logic

---
 logic/MapGenerator.lua | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 logic/MapGenerator.lua

(limited to 'logic/MapGenerator.lua')

diff --git a/logic/MapGenerator.lua b/logic/MapGenerator.lua
new file mode 100644
index 0000000..f1f45df
--- /dev/null
+++ b/logic/MapGenerator.lua
@@ -0,0 +1,57 @@
+local Room = require "objects.room"
+
+local mapGenerator = {}
+
+function mapGenerator.generate(roomCount, initial)
+    local firstRoom = Room:new(initial and "initialRoom" or nil)
+    local map = { firstRoom }
+    local available = utils.copy(map)
+
+    for i = 2, (roomCount or config.initialMapSize) do
+        -- connect the room with a new room
+        local newRoom = Room:new()
+        local prevRoom = utils.any(available)
+        prevRoom:connect(newRoom)
+
+        if prevRoom:isDoorFull() then
+            table.remove(available, utils.indexof(available, prevRoom))
+        end
+
+        table.insert(map, newRoom)
+        table.insert(available, newRoom)
+    end
+
+    return map
+end
+
+function mapGenerator.continue(roomCount, from)
+    -- continue game by extending the map
+    local newMap = mapGenerator.generate(roomCount or config.extendedMapSize, true)
+    local room = from or G.currentRoom
+
+    -- try extending from the last room
+    local entranceDoor, exitDoor = room:connect(newMap[1])
+    if not entranceDoor or not exitDoor then
+        -- if not doorless direction available in this room
+        -- try extend from a random Room
+        repeat
+            room = utils.any(G.allRooms)
+            if room ~= from and not room:isDoorFull() then
+                print("extended from a random room")
+                entranceDoor, exitDoor = room:connect(newMap[1])
+                break
+            end
+        until false
+    end
+    if exitDoor then
+        newMap[1]:removeDoor(exitDoor.location)
+    end
+
+    for _, newRoom in ipairs(newMap) do
+        table.insert(G.allRooms, newRoom)
+    end
+
+    G.mapExpanded = true
+end
+
+return mapGenerator
-- 
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