Menci
20 lines
1.3 KiB
C#
20 lines
1.3 KiB
C#
using hyjiacan.py4n;
|
|
|
|
namespace MaigoLabs.NeedLe.Indexer.Han;
|
|
|
|
public static class PinyinHelper
|
|
{
|
|
private static readonly string[] PINYIN_INITIALS = ["b", "p", "m", "f", "d", "t", "n", "l", "g", "k", "h", "j", "q", "x", "zh", "ch", "sh", "r", "z", "c", "s", "y", "w"];
|
|
private static readonly Dictionary<string, string> PINYIN_FINALS_FUZZY_MAP = new() { ["ang"] = "an", ["eng"] = "en", ["ing"] = "in" };
|
|
|
|
public static IEnumerable<string> GetPinyinCandidates(int codePoint) => codePoint < char.MinValue || codePoint > char.MaxValue || !PinyinUtil.IsHanzi((char)codePoint) ? [] :
|
|
Pinyin4Net.GetPinyin((char)codePoint, PinyinFormat.LOWERCASE | PinyinFormat.WITHOUT_TONE).Where(pinyin => pinyin.Length > 0).SelectMany(pinyin =>
|
|
{
|
|
var initial = PINYIN_INITIALS.FirstOrDefault(initial => pinyin.StartsWith(initial));
|
|
var initialAlphabet = initial != null ? initial[..1] : pinyin[..1];
|
|
var fuzzySuffix = pinyin.Length < 3 ? null : pinyin[^3..];
|
|
var fuzzyPinyin = fuzzySuffix != null && PINYIN_FINALS_FUZZY_MAP.TryGetValue(fuzzySuffix, out var fuzzySuffixTarget) ? pinyin[..^3] + fuzzySuffixTarget : null;
|
|
return new string?[] { pinyin, initial, initialAlphabet, fuzzyPinyin }.OfType<string>();
|
|
}).Distinct();
|
|
}
|