73 lines
1.9 KiB
TypeScript
73 lines
1.9 KiB
TypeScript
import type { Comment } from '../api/types';
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export interface CommentNode {
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comment: Comment;
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children: CommentNode[];
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}
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/** 评论显示昵称 */
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export function commentNick(c: Comment): string {
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if (c.user?.nickname) return c.user.nickname;
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if (c.guest_nick) return c.guest_nick;
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return '游客';
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}
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/** 评论头像首字 */
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export function commentInitial(c: Comment): string {
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return commentNick(c)[0] || '?';
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}
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/** 是否为游客评论 */
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export function isGuestComment(c: Comment): boolean {
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return !c.user_id || c.user_id === 0;
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}
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/** 收集评论及其 reply_to 后代的 ID（含自身） */
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export function collectCommentSubtreeIds(comments: Comment[], rootId: number): Set<number> {
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const ids = new Set<number>([rootId]);
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let changed = true;
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while (changed) {
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changed = false;
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for (const c of comments) {
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if (!ids.has(c.id) && c.reply_to != null && ids.has(c.reply_to)) {
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ids.add(c.id);
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changed = true;
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}
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}
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}
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return ids;
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}
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/** 构建嵌套评论树（优先 thread_parent_id，回退 reply_to） */
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export function buildCommentTree(comments: Comment[]): CommentNode[] {
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const map = new Map<number, CommentNode>();
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const roots: CommentNode[] = [];
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for (const c of comments) {
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map.set(c.id, { comment: c, children: [] });
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}
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for (const c of comments) {
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const node = map.get(c.id)!;
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const parentId = c.thread_parent_id ?? c.reply_to;
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if (parentId && map.has(parentId)) {
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map.get(parentId)!.children.push(node);
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} else {
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roots.push(node);
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}
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}
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return roots;
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}
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/** 评论日期：当年显示 MM月DD日 */
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export function formatCommentDate(iso: string): string {
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const d = new Date(iso);
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const now = new Date();
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const pad = (n: number) => String(n).padStart(2, '0');
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if (d.getFullYear() === now.getFullYear()) {
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return `${pad(d.getMonth() + 1)}月${pad(d.getDate())}日`;
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}
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return `${d.getFullYear()}年${d.getMonth() + 1}月${d.getDate()}日`;
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}
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