tools: addURLToText moved from libervia to sat_frontends/tools/strings

frontends/src/tools/strings.py

@@ -17,6 +17,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import re
+
 
 def getURLParams(url):
     """This comes from pyjamas.Location.makeUrlDict with a small change
@@ -40,3 +42,15 @@ def getURLParams(url):
         dict_[kv[0]] = kv[1] if len(kv) > 1 else ""
     return dict_
 
+
+def addURLToText(string):
+    """Check a text for what looks like an URL and make it clickable. Regexp
+    from http://daringfireball.net/2010/07/improved_regex_for_matching_urls"""
+
+    def repl(match):
+        url = match.group(0)
+        if not re.match(r"""[a-z]{3,}://|mailto:|xmpp:""", url):
+            url = "http://" + url
+        return '<a href="%s" target="_blank" class="url">%s</a>' % (url, match.group(0))
+    pattern = r"""(?i)\b((?:[a-z]{3,}://|(www|ftp)\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/|mailto:|xmpp:)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?]))"""
+    return re.sub(pattern, repl, string)