Attempt at Django 1.7

[wolnelektury.git] / apps / search / custom.py

diff --git a/apps/search/custom.py b/apps/search/custom.py
index 6cb18fd..b3b704d 100644 (file)
--- a/apps/search/custom.py
+++ b/apps/search/custom.py
@@ -1,10 +1,15 @@
-
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
 from sunburnt import sunburnt
 from lxml import etree
 import urllib
 import warnings
 from sunburnt import search
 import copy
+from httplib2 import socket
+import re
 
 
 class TermVectorOptions(search.Options):
@@ -89,7 +94,10 @@ class CustomSolrInterface(sunburnt.SolrInterface):
             self.writeable = False
         elif 'r' not in mode:
             self.readable = False
-        self.init_schema()
+        try:
+            self.init_schema()
+        except socket.error, e:
+            raise socket.error, "Cannot connect to Solr server, and search indexing is enabled (%s)" % str(e)
 
     def _analyze(self, **kwargs):
         if not self.readable:
@@ -119,8 +127,8 @@ class CustomSolrInterface(sunburnt.SolrInterface):
 
         if matches:
             return self.substring(kwargs['text'], matches,
-                            margins=kwargs.get('margins', 30),
-            mark=kwargs.get('mark', ("<b>", "</b>")))
+                margins=kwargs.get('margins', 30),
+                mark=kwargs.get('mark', ("<b>", "</b>")))
         else:
             return None
 
@@ -130,26 +138,54 @@ class CustomSolrInterface(sunburnt.SolrInterface):
         terms = map(lambda n: unicode(n.text), terms)
         return terms
 
+    def expand_margins(self, text, start, end):
+        totlen = len(text)
+
+        def is_boundary(x):
+            ws = re.compile(r"\W", re.UNICODE)
+            return bool(ws.match(x))
+
+        while start > 0:
+            if is_boundary(text[start - 1]):
+                break
+            start -= 1
+
+        while end < totlen - 1:
+            if is_boundary(text[end + 1]):
+                break
+            end += 1
+
+        return (start, end)
+
     def substring(self, text, matches, margins=30, mark=("<b>", "</b>")):
         start = None
         end = None
         totlen = len(text)
-        matches_margins = map(lambda (s, e): (max(0, s - margins), min(totlen, e + margins)), matches)
-        (start, end) = matches_margins[0]
-
-        for (s, e) in matches_margins[1:]:
+        matches_margins = map(lambda (s, e):
+                              ((s, e),
+                               (max(0, s - margins), min(totlen, e + margins))),
+                                  matches)
+        matches_margins = map(lambda (m, (s, e)):
+                              (m, self.expand_margins(text, s, e)),
+            matches_margins)
+
+            # lets start with first match
+        (start, end) = matches_margins[0][1]
+        matches = [matches_margins[0][0]]
+
+        for (m, (s, e)) in matches_margins[1:]:
             if end < s or start > e:
                 continue
             start = min(start, s)
             end = max(end, e)
+            matches.append(m)
 
         snip = text[start:end]
-        matches = list(matches)
         matches.sort(lambda a, b: cmp(b[0], a[0]))
+
         for (s, e) in matches:
             off = - start
             snip = snip[:e + off] + mark[1] + snip[e + off:]
             snip = snip[:s + off] + mark[0] + snip[s + off:]
-            # maybe break on word boundaries
-        return snip
 
+        return snip