feat: complete placement analysis workflow

src/lib/engine/skill-condition.ts

@@ -0,0 +1,51 @@
+export type SkillConditionMember = {
+  type: string;
+  generation: string;
+};
+
+export function plainSkillText(value: string): string {
+  return value.replace(/\[[^\]]+\]/g, '').replace(/\s+/g, ' ').trim();
+}
+
+function normalizedGroup(value: string): string {
+  return value
+    .replace(/^hololive\s+/i, '')
+    .replace(/\(이\)가$/, '')
+    .replace(/\s*타입$/, '')
+    .trim()
+    .toLowerCase();
+}
+
+function memberBelongsTo(member: SkillConditionMember, group: string): boolean {
+  const normalized = normalizedGroup(group);
+  const type = normalizedGroup(member.type);
+  const generation = normalizedGroup(member.generation);
+  const generations = member.generation
+    .split('/')
+    .map((value) => normalizedGroup(value))
+    .filter(Boolean);
+  return type === normalized
+    || generation === normalized
+    || generation.endsWith(normalized)
+    || generations.some((value) => value === normalized || value.endsWith(normalized));
+}
+
+export function skillConditionSatisfied(
+  condition: string,
+  members: readonly SkillConditionMember[]
+): boolean {
+  const description = plainSkillText(condition);
+  if (!description) return true;
+
+  // 콤보와 라이프는 분석에서 최적 플레이를 전제로 항상 충족한다.
+  if (/\d+콤보 이상이면/.test(description) || /라이프 \d+ 이상이면/.test(description)) return true;
+
+  const deckCondition = description.match(/^(.+?)\s*(\d+)명 이상이면$/);
+  if (!deckCondition) return true;
+  const requiredCount = Number(deckCondition[2]);
+  return members.filter((member) => memberBelongsTo(member, deckCondition[1])).length >= requiredCount;
+}
+
+export function skillTargetBelongsTo(member: SkillConditionMember, group: string): boolean {
+  return memberBelongsTo(member, group);
+}