init with react+axum+spacetimedb

src/services/storyEngine/worldMutationRouter.ts

@@ -0,0 +1,127 @@
+import type {
+  ChapterState,
+  GameState,
+  StorySignal,
+  WorldMutation,
+} from '../../types';
+
+function dedupeStrings(values: Array<string | null | undefined>, limit = 6) {
+  return [...new Set(values.map((value) => value?.trim() ?? '').filter(Boolean))]
+    .slice(0, limit);
+}
+
+export function resolveWorldMutations(params: {
+  state: GameState;
+  signals: StorySignal[];
+  chapterState: ChapterState | null | undefined;
+}) {
+  const currentSceneId = params.state.currentScenePreset?.id;
+  const activeThreadIds = params.state.storyEngineMemory?.activeThreadIds ?? [];
+  const mutations: WorldMutation[] = [];
+
+  if (currentSceneId && params.chapterState) {
+    mutations.push({
+      id: `mutation:scene:${currentSceneId}:${params.chapterState.stage}`,
+      mutationType: 'scene_text',
+      targetId: currentSceneId,
+      reason: `${params.chapterState.title}正在改写这片地界的表面气氛。`,
+      relatedThreadIds: params.chapterState.primaryThreadIds,
+    });
+  }
+
+  if (currentSceneId && params.signals.some((signal) => signal.signalType === 'win_battle')) {
+    mutations.push({
+      id: `mutation:pressure:${currentSceneId}:battle`,
+      mutationType: 'enemy_pressure',
+      targetId: currentSceneId,
+      reason: '这一带的敌意正在因交锋结果重新聚拢。',
+      relatedThreadIds: dedupeStrings(activeThreadIds, 4),
+    });
+  }
+
+  if (params.signals.some((signal) => signal.signalType === 'obtain_carrier')) {
+    mutations.push({
+      id: `mutation:attitude:${currentSceneId ?? 'scene'}:carrier`,
+      mutationType: 'npc_attitude',
+      targetId: currentSceneId ?? 'scene',
+      reason: '关键载体已经落到你手里，相关角色的口风会开始变化。',
+      relatedThreadIds: dedupeStrings(activeThreadIds, 4),
+    });
+  }
+
+  if (params.chapterState?.stage === 'climax' && currentSceneId) {
+    mutations.push({
+      id: `mutation:route:${currentSceneId}:climax`,
+      mutationType: 'route_unlock',
+      targetId: currentSceneId,
+      reason: '章节高潮逼近，新的通路或对峙点开始显影。',
+      relatedThreadIds: params.chapterState.primaryThreadIds,
+    });
+  }
+
+  return mutations;
+}
+
+export function applyWorldMutationsToGameState(params: {
+  state: GameState;
+  mutations: WorldMutation[];
+}) {
+  const knownMutations = [
+    ...(params.state.storyEngineMemory?.worldMutations ?? []),
+    ...params.mutations,
+  ];
+  if (knownMutations.length <= 0) {
+    return params.state;
+  }
+
+  const currentSceneId = params.state.currentScenePreset?.id ?? null;
+  const relevantMutations = currentSceneId
+    ? knownMutations.filter((mutation) => mutation.targetId === currentSceneId)
+    : knownMutations;
+  const latestSceneMutation = relevantMutations
+    .filter((mutation) => mutation.mutationType === 'scene_text')
+    .at(-1);
+  const pressureMutationCount = relevantMutations.filter(
+    (mutation) => mutation.mutationType === 'enemy_pressure',
+  ).length;
+  const attitudeMutation = relevantMutations
+    .filter((mutation) => mutation.mutationType === 'npc_attitude')
+    .at(-1);
+  const currentPressureLevel =
+    pressureMutationCount >= 3
+      ? 'extreme'
+      : pressureMutationCount === 2
+        ? 'high'
+        : pressureMutationCount === 1
+          ? 'medium'
+          : params.state.currentScenePreset?.currentPressureLevel ?? 'low';
+
+  return {
+    ...params.state,
+    currentScenePreset: params.state.currentScenePreset
+      ? {
+          ...params.state.currentScenePreset,
+          mutationStateText:
+            [latestSceneMutation?.reason, attitudeMutation?.reason]
+              .filter(Boolean)
+              .join(' ')
+            ?? params.state.currentScenePreset.mutationStateText
+            ?? null,
+          currentPressureLevel,
+          description: [
+            params.state.currentScenePreset.description,
+            latestSceneMutation?.reason,
+          ]
+            .filter(Boolean)
+            .join(' '),
+          npcs: params.state.currentScenePreset.npcs?.map((npc) => ({
+            ...npc,
+            description:
+              attitudeMutation && !npc.hostile
+                ? `${npc.description} ${attitudeMutation.reason}`
+                : npc.description,
+          })),
+        }
+      : params.state.currentScenePreset,
+  };
+}