tag.ts

import { parseNamespace } from './namespace.js';
import type { NamespaceName } from './interfaces/ehtag.js';
import { RawTag } from './raw-tag.js';

export function parseTag(tag: string):
    | {
          valid: true;
          ns: NamespaceName | undefined;
          raw: RawTag;
      }
    | {
          valid: false;
          ns: NamespaceName | undefined;
          raw: string;
      } {
    tag = tag ?? '';
    let ns: string | undefined;
    const i = tag.indexOf(':');
    if (i >= 0) {
        ns = tag.slice(0, i);
        tag = tag.slice(i + 1);
    }
    const namespace = parseNamespace(ns);
    const raw = RawTag(tag);
    if (!raw)
        return {
            valid: false,
            ns: ns != null ? namespace : undefined,
            raw: tag.trim().toLowerCase(),
        };
    return {
        valid: true,
        ns: ns != null ? namespace : undefined,
        raw,
    };
}

/** 生成含命名空间 `f`, `m` 和 `x` 的标签 */
export function tagAbbr(tag: RawTag, ns?: NamespaceName): string {
    if (ns === 'male') return `m:${tag}`;
    if (ns === 'female') return `f:${tag}`;
    if (ns === 'mixed') return `x:${tag}`;
    return tag;
}

/** 生成含命名空间的标签 */
export function tagFull(tag: RawTag, ns: NamespaceName): string {
    return `${ns}:${tag}`;
}

export const namespaceMapToSearch: Readonly<Record<NamespaceName, string>> = Object.freeze({
    artist: 'a:',
    parody: 'p:',
    reclass: 'r:',
    character: 'c:',
    group: 'g:',
    language: 'l:',
    male: 'm:',
    female: 'f:',
    mixed: 'x:',
    other: 'o',
    cosplayer: 'cos:',
    rows: 'rows:',
});

/** 生成含单字母命名空间的标签 */
export function tagAbbrFull(tag: RawTag, ns: NamespaceName): string {
    return `${namespaceMapToSearch[ns]}${tag}`;
}