/// <summary>
/// 媒体名称节点的打分函数（越大越好）
/// </summary>
/// <param name="Nodes"></param>
/// <param name="Pattern"></param>
/// <param name="Strategy"></param>
/// <param name="BaseItemCount"></param>
/// <returns></returns>
internal static double MediaNodeRelPatternScore(IEnumerable <HtmlNode> Nodes, ListStrategy Strategy, int BaseItemCount, int PathLevel, bool PathUsingName)
{
double AvgPossibility = 0;
foreach (HtmlNode Node in Nodes)
{
string Text = TextCleaner.FullClean(XPathUtility.InnerTextNonDescendants(Node));
if (Text.Length > Strategy.MaxLenMedia)
{
continue;
}
double Posibility = Strategy.MediaType == MediaType.WebNews ? 0.1 : 0;
//检查是否命中日期或点击数的特殊字符，还不能全部排除，可能有特殊的报纸名称哦,本节点的可能性记为0继续下一个
if (TextCleaner.CountCharInSet(Text, FrequentCharSet_MustNotMediaAuthorDate, false) > 1)
{
Posibility = 0.2;
}
//是否是日期时间
if (TextCleaner.CountCharInSet(Text, FrequentCharSet_Dates, false) > Text.Length * 0.6)
{
Posibility *= 0.3;
}
//检查开头
Match PrefixMatch = Regex.Match(Text, MediaPrefixRegex);
if (PrefixMatch.Success)
{
Text = Text.Substring(PrefixMatch.Index + PrefixMatch.Length).TrimStart(':', '：', ']', '】', ' ');
Posibility = 1;
}
//禁用词替换
Text = TextCleaner.RemoveStopWords(Text, StopWords);
//检查结尾
if (Regex.IsMatch(Text, @"[报台网刊]"))
{
if (Posibility > 0)
{
Posibility = Math.Max(1, Posibility * 1.5);
}
else
{
Posibility = 0.8;
}
}
//根据class和id是否有特殊字样加权
bool IDClassNameMatched;
double IDClassScore = IDClassNameScore(Node, MediaClassNames_Must, MediaClassNames_MustNot, out IDClassNameMatched);
if (IDClassNameMatched)
{
Posibility = (Posibility == 0 ? 1 : Posibility) * IDClassScore;
}
//长度检查
if (Text.Length * 3 < Strategy.List_BestAvgMediaLen || Text.Length > Strategy.List_BestAvgMediaLen * 3)
{
Posibility /= 3; //超过3倍降权到1/3
}
else
{
//Rate在1-3之间
double Rate = Text.Length >= Strategy.List_BestAvgMediaLen ? Text.Length / (double)Strategy.List_BestAvgMediaLen
: Strategy.List_BestAvgMediaLen / (double)Text.Length;
//随着Rate提高降低
Posibility *= (0.4 + 0.35 * (3 - Rate));
}
//非名称分隔符（包含空格）出现，6折
if (TextCleaner.CountCharInSet(Text, NoneNameSeperatorSet, true) > 0)
{
Posibility *= 0.6;
}
//英文出现，再6折
if (LanguageUtility.DetectedLanguage(Text) == Enums.Language.ENGLISH)
{
Posibility *= 0.6;
}
//累加节点的可能性
AvgPossibility += Posibility;
}
//微调1：级别约小的越好，2级以上每多一个级别扣10%可能性
if (PathLevel > 1)
{
AvgPossibility *= (1 - 0.1 * (PathLevel - 1));
}
//微调2：用ID和class的好于用序号的，增加20%可能性
if (PathUsingName)
{
AvgPossibility *= 1.2;
}
//论坛媒体减分
if (Strategy.MediaType == Enums.MediaType.Forum)
{
AvgPossibility /= 2;
}
return(AvgPossibility / Nodes.Count());
}