refactor: clean up boop implementation structure

src/samples/boop/utils/pieces.ts

@@ -0,0 +1,40 @@
+import {BoopPart, PieceType, PlayerType, RegionType} from "@/samples/boop/types";
+import {BoopState} from "@/samples/boop/state";
+import {BoopGame} from "@/samples/boop/types-extensions";
+
+/**
+ * 在区域中查找棋子
+ */
+export function findPartInRegion(
+    ctx: BoopGame | BoopState,
+    regionId: keyof BoopGame['value']['regions'],
+    type: PieceType,
+    player?: PlayerType
+): BoopPart | null {
+    const state = getState(ctx);
+    if(!regionId){
+        return Object.values(state.pieces).find(part => match(regionId, part, type, player)) || null;
+    }
+    const id = state.regions[regionId].childIds.find(id => match(regionId, state.pieces[id], type, player));
+    return id ? state.pieces[id] || null : null;
+}
+
+/**
+ * 在指定位置查找棋子
+ */
+export function findPartAtPosition(ctx: BoopGame | BoopState, row: number, col: number): BoopPart | null {
+    const state = getState(ctx);
+    const id = state.regions.board.partMap[`${row},${col}`];
+    return id ? state.pieces[id] || null : null;
+}
+
+function match(regionId: RegionType, part: BoopPart, type: PieceType, player?: PlayerType){
+    return regionId === part.regionId && part.type === type && (!player || part.player === player);
+}
+
+function getState(ctx: BoopGame | BoopState): BoopState {
+    if('value' in ctx){
+        return ctx.value;
+    }
+    return ctx;
+}