Unity中使用的一套敏感詞過濾方式

當項目中的敏感詞數量不是很多的時候，直接用數組來遍歷過濾其實也可以，但是具體的數量有多大，這個肯定不好說，因此，對.txt中的敏感詞合理組織后再進行過濾就顯得非常有必要了。

如上圖，左邊是txt中配置的敏感詞，右邊是需要轉換為的數據結構（C#中的Dictory來存儲即可）

下面那句話是一個示例，即需要過濾敏感詞的句子。

具體的實現代碼:

using System;
using System.IO;
using System.Collections;
using UnityEngine;
using Common;
using System.Collections.Generic;
using System.Text;

public class FilterSensitiveWords
{
    static string[] sensitiveWordsArray = null;
    static string fileName = "sensitivewords.u";
    static string ReplaceValue = "*";
    static Dictionary<char, IList<string>> keyDict;

    public static void Initialize()
    {
        string path = "txt/sensitivewords.u";
        string name = "sensitivewords";
        LoadHelp.LoadAssetBundle(path, name, ar =>
        {
            string content = ar.Bundle.LoadAsset<TextAsset>(name).text;
            if (!(content.Equals("") || content.Equals(null)))
            {
                sensitiveWordsArray = content.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);

                keyDict = new Dictionary<char, IList<string>>();
                foreach (string s in sensitiveWordsArray)
                {
                    if (string.IsNullOrEmpty(s))
                        continue;
                    if (keyDict.ContainsKey(s[0]))
                        keyDict[s[0]].Add(s.Trim(new char[] { '\r' }));
                    else
                        keyDict.Add(s[0], new List<string> { s.Trim(new char[] { '\r' }) });
                }
            }
        });
    }

    //判斷一個字符串是否包含敏感詞，包括含的話將其替換為*
    public static bool IsContainSensitiveWords(ref string text, out string SensitiveWords)
    {
        bool isFind = false;
        SensitiveWords = "";
        if (null == sensitiveWordsArray || string.IsNullOrEmpty(text))
            return isFind;

        int len = text.Length;
        StringBuilder sb = new StringBuilder(len);
        bool isOK = true;
        for (int i = 0; i < len; i++)
        {
            if (keyDict.ContainsKey(text[i]))
            {
                foreach (string s in keyDict[text[i]])
                {
                    isOK = true;
                    int j = i;
                    foreach (char c in s)
                    {
                        if (j >= len || c != text[j++])
                        {
                            isOK = false;
                            break;
                        }
                    }
                    if (isOK)
                    {
                        SensitiveWords = s;
                        isFind = true;
                        i += s.Length - 1;
                        sb.Append('*', s.Length);
                        break;
                    }

                }
                if (!isOK)
                    sb.Append(text[i]);
            }
            else
                sb.Append(text[i]);
        }
        if (isFind)
            text = sb.ToString();

        return isFind;
    }
}