private static int GetArticleImageCount(this string input, IMarkupPatterns markupPatterns)
{
var regex = new Regex(markupPatterns.ImagePattern, RegexOptions.Multiline);
var matches = regex.Matches(input);
return(matches.Count);
}
public static double GetWordReadTimeInMinutes(this string input, IMarkupPatterns markupPatterns)
{
var strippedString = input.StripTags(markupPatterns);
var(eastAsianReadTime, cleanedString) = strippedString.EstimateAndStripEastAsianCharacters(markupPatterns);
var wordCount = cleanedString.GetArticleWordCount(markupPatterns);
var wordReadTimeInMinutes = wordCount / (double)Constants.WordsPerMinute;
return(wordReadTimeInMinutes + eastAsianReadTime);
}
public static double GetImageReadTimeInMinutes(this string input, IMarkupPatterns markupPatterns)
{
double seconds;
const int imageReadTime = Constants.ImageReadTimeInSeconds;
var imageCount = input.GetArticleImageCount(markupPatterns);
if (imageCount > 10)
{
seconds = ((imageCount / 2.0) * (imageReadTime * 3)) + (imageCount - 10) * 3;
}
else
{
seconds = (imageCount / 2.0) * (2 * imageReadTime + (1 - imageCount));
}
return(seconds / 60.0);
}
private static string StripTags(this string input, IMarkupPatterns markupPatterns)
{
var regex = new Regex(markupPatterns.TagsPattern, RegexOptions.Multiline | RegexOptions.IgnoreCase);
return(regex.Replace(input, ""));
}
private static (double, string) EstimateAndStripEastAsianCharacters(this string input, IMarkupPatterns markupPatterns)
{
var regex = new Regex(markupPatterns.EastAsianCharSetPattern, RegexOptions.Multiline);
var matches = regex.Matches(input);
var count = matches.Count;
var readTimeInMinutes = count / (double)Constants.EastAsianCharactersPerMinute;
var cleanedString = regex.Replace(input, "");
return(readTimeInMinutes, cleanedString);
}
