/// <summary>
/// 替换非法字符
/// </summary>
/// <param name="text"></param>
/// <param name="mask">用于代替非法字符</param>
/// <returns>替换后的字符串</returns>
public string Replace(string text, char mask = '*')
{
char[] chars = null;
for (int head = 0; head < text.Length; head++)
{
int index = head;
TrieNode node = this;
while (node.TryGetValue(GetSimp(text[index]), out node))
{
if (node.m_end)
{
if (chars == null)
{
chars = text.ToArray();
}
for (int i = head; i <= index; i++)
{
chars[i] = mask;
}
head = index;
}
if (text.Length == ++index)
{
break;
}
}
}
return(chars == null ? text : new string(chars));
}
/// <summary>
/// 查找所有非法字符
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public IEnumerable <string> FindAll(string text)
{
for (int head = 0; head < text.Length; head++)
{
int index = head;
TrieNode node = this;
while (node.TryGetValue(GetSimp(text[index]), out node))
{
if (node.m_end)
{
yield return(text.Substring(head, index - head + 1));
}
if (text.Length == ++index)
{
break;
}
}
}
}
/// <summary>
/// 检查是否包含非法字符
/// </summary>
/// <param name="text">输入文本</param>
/// <returns>找到的第1个非法字符.没有则返回string.Empty</returns>
public bool HasBadWord(string text)
{
for (int head = 0; head < text.Length; head++)
{
int index = head;
TrieNode node = this;
while (node.TryGetValue(GetSimp(text[index]), out node))
{
if (node.m_end)
{
return(true);
}
if (text.Length == ++index)
{
break;
}
}
}
return(false);
}
/// <summary>
/// 检查是否包含非法字符
/// </summary>
/// <param name="text">输入文本</param>
/// <returns>找到的第1个非法字符.没有则返回string.Empty</returns>
public string FindOne(string text)
{
for (int head = 0; head < text.Length; head++)
{
int index = head;
TrieNode node = this;
while (node.TryGetValue(GetSimp(text[index]), out node))
{
if (node.m_end)
{
return(text.Substring(head, index - head + 1));
}
if (text.Length == ++index)
{
break;
}
}
}
return(string.Empty);
}
/// <summary>
/// 查找所有非法字符
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public List <string> FindAll(string text)
{
List <string> result = new List <string>();
for (int head = 0; head < text.Length; head++)
{
int index = head;
TrieNode node = this;
while (node.TryGetValue(text[index], out node))
{
if (node.m_end)
{
result.Add(text.Substring(head, index - head + 1));
}
if (text.Length == ++index)
{
break;
}
}
}
return(result);
}
