rename notes/and files

autoload/denote/meta.vim

@@ -25,12 +25,22 @@ endfunction
 
 " Return the note title from the filename.
 function denote#meta#noteTitleFromFile(file)
-	return a:file->fnamemodify(':t')->matchstr('--\zs.\{-\}\ze\(==\|@@\|__\|\..\)')->substitute('-', ' ', 'g')
+	return a:file->fnamemodify(':t')
+				\ ->matchstr('--\zs.\{-\}\ze\(==\|@@\|__\|\..\)')
+				\ ->substitute('-', ' ', 'g')
 endfunction
 
 " Return the note tags from the filename as a list.
 function denote#meta#noteTagsFromFile(file)
-	return a:file->fnamemodify(':t')->matchstr('__\zs.\{-\}\ze\(==\|@@\|--\|\..\)')->split('_')
+	return a:file->fnamemodify(':t')
+				\ ->matchstr('__\zs.\{-\}\ze\(==\|@@\|--\|\..\)')
+				\ ->split('_')
+endfunction
+
+" Return the note signature from the filename.
+function denote#meta#noteSignatureFromFile(file)
+	return a:file->fnamemodify(':t')
+				\ ->matchstr('==\zs.\{-\}\ze\(==\|@@\|__\|\..\)')
 endfunction
 
 " Identifier creation
@@ -39,3 +49,24 @@ function denote#meta#identifier_generate()
 				\ ? strftime('%Y%m%dT%H%M%S')
 				\ : rand()
 endfunction
+
+" This function removes illegal characters in parts of the filename.
+function s:santizefnpart(part)
+	return a:part->tolower()
+				\ ->substitute('[^[:alnum:]]', '-', 'g')
+				\ ->substitute('-\+', '-', 'g')
+				\ ->substitute('_\+', '_', 'g')
+				\ ->substitute('=\+', '=', 'g')
+				\ ->substitute('@\+', '@', 'g')
+				\ ->trim('-_@=')
+endfunction
+
+" Function that returns the filename give all metadata. The filename is
+" returned with the path to the denote directory.
+function denote#meta#filename(ext, identifier, title='', tags=[], signature='')
+	let l:f = g:denote_directory .. '/' .. s:santizefnpart(a:identifier)
+	let l:f ..= len(a:signature) > 0 ? ('==' .. s:santizefnpart(a:signature)) : ''
+	let l:f ..= len(a:title) > 0 ? ('--' .. s:santizefnpart(a:title)) : ''
+	let l:f ..= len(a:tags) > 0 ? ('__' .. map(copy(a:tags), {_, v -> s:santizefnpart(v)})->join('_')) : ''
+	return l:f .. '.' .. a:ext
+endfunction