orig = """
GroovyWikifyGoogleSidewiki:

Let's WikifyGoogleSidewiki with some additional GroovyCode.
What about a '''really''' GroovyGoogleSidewiki?

This text serves for testing this GroovySnippet which transforms a text
with some typical WikiSyntax, that is not yet supported by Google's
SideWiki:
* CamelCase
* ''ItalicizedText''
* ''' ''BoldItalicizedText'' ''' (containing '''Camel ''case'' or not''' )
* BracketLinks such as: [http://meatballwiki.org/wiki/WikifyGoogleSidewiki WikifyGoogleSidewiki]
* Bold BracketLinks such as:''' [http://meatballwiki.org/wiki/WikifyGoogleSidewiki WikifyGoogleSidewiki] ''' 
* GoogleTagLinks like this Tag+Tic+ Toc+

contributed by FridemarPache (CC 2009) with 
* CreativeCommonsAuthorCredit, 
* CreativeCommonsShareAlike, 
* CreativeCommonsDerivedWorksAllowed.

"""

UrlChars=/-a-zA-Z0-9\/:._&?/

BracketLink = /(?:w*?)\[([$UrlChars]+)( )(.+?)\]/

WikiWord = /(?:w*?)\b([a-zA-Z0-9_]+:)?((?:[A-Z](?:[?a-z0-9])+){2,})\b(?:w*?)/   // A WikiWord can have an optional freeform WikiPrefix

TagCombination =/(?:w*?)(([a-zA-Z0-9_]+\+)+)(?:w*?)/

GooglePrefix = """http://google.com/search?q="""

Boldizer ="""(?:''')((?s).*?)(?:''')"""

Italizer  = """(?:'')((?s).*?)(?:'')"""

def markAsBold(s) {
 return "<b>$s</b>"
}

def markAsItalized(s) {
  return "<i>$s</i>"
}

def makeHtmlLinks(orig) {
   orig.replaceAll(/$BracketLink|$WikiWord/) { 
       fullMatch, a,b,c, d,e  ->  
       /* println """
       fullMatch:$fullMatch:: 
       (a $a) (b $b) (c $c)
       (d $d) (e $e)
       """ */
       
       if ((a)&&(b)&& (c)) return """<a href="$a">$c</a>"""
       
       if (e) { 
         temp=(d)?d+e:e
          return """<a href="$GooglePrefix$temp">$temp</a>""" 
       }
    }
}

def boldize(orig) {
   orig.replaceAll(/$Boldizer/) { 
       fullMatch, a  ->  
       // println "BOLD fullMatch:$fullMatch:: (a $a)"
        if (a) return ("<b>$a</b>")
       
   }
}

def italize(orig) {
       orig.replaceAll(/$Italizer/) { 
       fullMatch, a  ->  
       // println "fullMatch:$fullMatch:: (a $a)"
       if (a) return ("<i>$a</i>")
       
   }
}

def makeTagLinks(orig) {
   orig.replaceAll(/$TagCombination/) { 
       fullMatch, a, b  ->  
       /* println """
        fullMatch:$fullMatch:: 
        (a $a) (b $b) EndTagLinks
        """ */
       
        if (a) 
         return ("""<a href="$GooglePrefix$a">$a</a>""")
   }
}

def WikifyGoogleSidewikiWithGroovy(orig) {
 // println()
 tb=boldize(orig)
 ti=italize(tb)
 t=makeHtmlLinks(ti)
 s=makeTagLinks(t)
 println (s)
}

WikifyGoogleSidewikiWithGroovy(orig)

// [GoogleSideWiki:WikifyGoogleSidewikiWithGroovy]

// [GoogleSideWiki:Result string of WikifyGoogleSidewikiWithGroovy]