/// <summary>
/// 类初始化
/// </summary>
/// <param name="wordDict">敏感词集合(key-敏感词,value-替换字符)</param>
private void Initialization(Dictionary <string, string> wordDict)
{
Array.Clear(_wordTable, 0, _wordTable.Length);
List <WordEntity> wordList = new List <WordEntity>();
WordFilterStatus status;
foreach (var pair in wordDict)
{
StringBuilder wordBuilder = new StringBuilder();
string tempWord = pair.Key;
status = WordFilterStatus.Replace;
string replacement = string.IsNullOrEmpty(pair.Value) ? "*" : pair.Value;
if (replacement == "{Banned}")
{
status = WordFilterStatus.Banned;
}
if (pair.Key.StartsWith("\""))
{
//转换成繁体再加载一个
WordEntity regexWord = new WordEntity()
{
Word = pair.Key.Trim('\"'),
Replacement = replacement,
WordFilterStatus = status
};
_regexWords.Add(regexWord);
continue;
}
tempWord = IgnoreCharacterProcess(pair.Key);
for (int i = 0; i < tempWord.Length; i++)
{
wordBuilder.Append((char)FastToLower(tempWord[i])); //统一转换成小写
}
//添加到列表
WordEntity simpleWord = new WordEntity()
{
Word = wordBuilder.ToString(),
Replacement = replacement,
WordFilterStatus = status
};
wordList.Add(simpleWord);
}
_regexWords = _regexWords.OrderByDescending(n => n.WordFilterStatus).ToList();
//去除重复
Comparison <WordEntity> cmp = delegate(WordEntity a, WordEntity b)
{
return(a.Word.CompareTo(b.Word));
};
wordList.Sort(cmp);
for (int idx = wordList.Count - 1; idx > 0; idx--)
{
if (wordList[idx].Word == wordList[idx - 1].Word)
{
wordList.RemoveAt(idx);
}
}
//添加到字典
foreach (WordEntity entity in wordList)
{
WordGroup group = _wordTable[(int)entity.Word[0]];
if (group == null)
{
group = new WordGroup();
group.AppendWord(entity.Word.Substring(1), entity.WordFilterStatus, entity.Replacement);
_wordTable[(int)entity.Word[0]] = group;
}
else
{
group.AppendWord(entity.Word.Substring(1), entity.WordFilterStatus, entity.Replacement);
}
}
}
/// <summary>
/// 测试字符串是否出现屏蔽字
/// </summary>
/// <param name="source">需要处理的字符串</param>
/// <param name="status">敏感词处理状态</param>
/// <returns>最终处理方式</returns>
public string Filter(string source, out WordFilterStatus status)
{
status = WordFilterStatus.Replace;
if (string.IsNullOrEmpty(source))
{
return(source);
}
StringBuilder sb = new StringBuilder();
for (int start = 0; start < source.Length; start++)
{
WordGroup wordGroup = _wordTable[FastToLower(source[start])];
if (wordGroup != null)
{
bool found = false;
for (int idx = 0; idx < wordGroup.Count; idx++)
{
WordEntity we = wordGroup.GetItem(idx);
int matchLength = 0;
if (we.Word.Length == 0 || CheckString(source, we.Word, start + 1, out matchLength))
{
if (we.WordFilterStatus == WordFilterStatus.Banned)
{
status = we.WordFilterStatus;
break;
}
found = true;
sb.Append(we.Replacement);
start += matchLength;
}
}
if (status == WordFilterStatus.Banned)
{
break;
}
if (!found)
{
sb.Append(source[start]);
found = false;
}
}
else
{
sb.Append(source[start]);
}
}
if (status == WordFilterStatus.Replace)
{
source = sb.ToString();
source = RegexFilter(source, out status);
}
return(source);
}