/// <summary>
/// Returns an array with all the distinct tags available in the files of the specified folder ordered by tag name (ascending).
/// Includes only .md or .mdh files
/// Excludes files with a name starting with "_", with the name "index" or "default".
/// By default includes only the files directly inside the folder, not in subfolders
///
/// Syntax: TagsFromFolder folderName topFolderOnly(true*/false or 1/0)
///
/// Examples:
/// TagsFromFolder folderName
/// TagsFromFolder folderName false
/// </summary>
/// <param name="currentFile"></param>
/// <param name="parameters"></param>
/// <returns>An array of strings with tag names in files, that can be used in Liquid tags</MIISFile></returns>
object IFMSource.GetValue(MIISFile currentFile, params string[] parameters)
{
//Expects these parameters (* indicates the default value):
//- Folder path relative to the current file or to the root of the site
//- Top folder files only (true*/false, could be 1*/0)
//Check if there's a folder specified
if (parameters.Length == 0)
{
throw new Exception("Folder not specified!!");
}
string folderPath = FilesEnumeratorHelper.GetFolderAbsPathFromName(parameters[0]);
//Include top folder only or all subfolders (second parameter)
bool topOnly = true;
try
{
string sTopOnly = parameters[1].ToLowerInvariant();
topOnly = topOnly = FilesEnumeratorHelper.IsTruthy(sTopOnly); //If the second parameter is "false" or "0", then use topOnly files
}
catch { }
//Third parameter: include default files (index, default)
bool includeDefFiles = false;
try
{
string sincludeDefFiles = parameters[2].ToLowerInvariant();
includeDefFiles = FilesEnumeratorHelper.IsTruthy(sincludeDefFiles);
}
catch { }
string cacheKey = folderPath + "_tags" + "_" + topOnly + "_" + includeDefFiles;
//Check if tags are already cached
var tags = HttpRuntime.Cache[cacheKey];
if (tags == null) //Get tags from disk
{
//Get al files in the folder (and subfolders if indicated), without specific ordering (we don't need it and it'll save some processing time)
IEnumerable <MarkdownFile> allFiles = FilesEnumeratorHelper.GetAllFilesFromFolder(folderPath, topOnly);
//Filter only those that are published
var publishedFilesProxies = FilesEnumeratorHelper.OnlyPublished(allFiles);
//Get all the tags in the published files (if any)
HashSet <string> hTags = new HashSet <string>();
foreach (MIISFile mf in publishedFilesProxies)
{
hTags.UnionWith(mf.Tags);
}
//Get the number of files in each tag
tags = from t in hTags
select new
{
name = t,
count = (from f in publishedFilesProxies
where f.Tags.Contains <string>(t)
select f).Count()
};
//FILE CACHING
FilesEnumeratorHelper.AddFileCacheDependencies(currentFile, folderPath, allFiles, topOnly);
//Add tags to cache depending on the folder and the time until the next published file
FilesEnumeratorHelper.AddFileListToCache(folderPath, cacheKey,
FilesEnumeratorHelper.NumSecondsToNextFilePubDate(allFiles),
tags, topOnly);
}
return(tags);
}
//Ugly method to have in one place all the code common to various FM Sources that are in this assembly
//DRY, you know ;-)
internal static IEnumerable <MIISFile> GetFilesFromParameters(MIISFile currentFile, params string[] parameters)
{
//Expects these parameters (* indicates the default value):
//- Folder path relative to the current file or to the root of the site
//- Top folder files only (true*/false, could be 1*/0)
//First parameter: folder to process
//Check if there's a folder specified
if (parameters.Length == 0)
{
throw new Exception("Folder not specified!!");
}
string folderPath = FilesEnumeratorHelper.GetFolderAbsPathFromName(parameters[0]);
//Second parameter: include files in subfolders
//Include top folder only or all subfolders
bool topOnly = true;
try
{
string sTopOnly = parameters[1].ToLowerInvariant();
topOnly = FilesEnumeratorHelper.IsTruthy(sTopOnly); //If the second parameter is "false" or "0", then use topOnly files
}
catch { }
//Third parameter: include default files (index, default)
bool includeDefFiles = false;
try
{
string sincludeDefFiles = parameters[2].ToLowerInvariant();
includeDefFiles = FilesEnumeratorHelper.IsTruthy(sincludeDefFiles);
}
catch { }
//Get al files in the folder (and subfolders if indicated), ordered by date desc
IEnumerable <MarkdownFile> allFiles = FilesEnumeratorHelper.GetAllFilesFromFolder(folderPath, topOnly, includeDefFiles);
//File caching dependencies
FilesEnumeratorHelper.AddFileCacheDependencies(currentFile, folderPath, allFiles, topOnly);
//Filter only those that are published
IEnumerable <MIISFile> publishedFilesProxies = FilesEnumeratorHelper.OnlyPublished(allFiles);
int numPublishedFiles = publishedFilesProxies.Count();
//Filter by tag or category from QueryString params
NameValueCollection qs = HttpContext.Current.Request.QueryString;
if (!string.IsNullOrWhiteSpace(qs["tag"])) //More specific, takes precedence
{
string tag = qs["tag"].ToLowerInvariant();
publishedFilesProxies = from file in publishedFilesProxies
where file.Tags.Contains <string>(tag)
select file;
}
else if (!string.IsNullOrWhiteSpace(qs["categ"]))
{
string categ = qs["categ"].ToLowerInvariant();
publishedFilesProxies = from file in publishedFilesProxies
where file.Categories.Contains <string>(categ)
select file;
}
return(publishedFilesProxies);
}