From a8cf5584204d77bd3f234fe579844ca84bb3558d Mon Sep 17 00:00:00 2001
From: bnewbold <bnewbold@robocracy.org>
Date: Mon, 2 May 2011 21:41:28 -0400
Subject: basic json keyword search

---
 piccast/feeds/models.py | 39 +++++++++++++++++++++++++++++++++++++++
 piccast/feeds/views.py  | 22 ++++++++++++++++++++++
 piccast/urls.py         |  1 +
 3 files changed, 62 insertions(+)

(limited to 'piccast')

diff --git a/piccast/feeds/models.py b/piccast/feeds/models.py
index cbc12e4..0ec24f1 100644
--- a/piccast/feeds/models.py
+++ b/piccast/feeds/models.py
@@ -126,3 +126,42 @@ class PicSet(models.Model):
                 }
 
 
+# The below search code comes from Julien Phalip
+
+import re
+from django.db.models import Q
+
+def normalize_query(query_string,
+                    findterms=re.compile(r'"([^"]+)"|(\S+)').findall,
+                    normspace=re.compile(r'\s{2,}').sub):
+    ''' Splits the query string in invidual keywords, getting rid of unecessary spaces
+        and grouping quoted words together.
+        Example:
+        
+        >>> normalize_query('  some random  words "with   quotes  " and   spaces')
+        ['some', 'random', 'words', 'with quotes', 'and', 'spaces']
+    
+    '''
+    return [normspace(' ', (t[0] or t[1]).strip()) for t in findterms(query_string)] 
+
+def get_query(query_string, search_fields):
+    ''' Returns a query, that is a combination of Q objects. That combination
+        aims to search keywords within a model by testing the given search fields.
+    
+    '''
+    query = None # Query to search for every search term        
+    terms = normalize_query(query_string)
+    for term in terms:
+        or_query = None # Query to search for a given term in each field
+        for field_name in search_fields:
+            q = Q(**{"%s__icontains" % field_name: term})
+            if or_query is None:
+                or_query = q
+            else:
+                or_query = or_query | q
+        if query is None:
+            query = or_query
+        else:
+            query = query & or_query
+    return query
+
diff --git a/piccast/feeds/views.py b/piccast/feeds/views.py
index 1c26d12..d434818 100644
--- a/piccast/feeds/views.py
+++ b/piccast/feeds/views.py
@@ -35,3 +35,25 @@ def pics_by_set(request, req_picset):
     pics = Pic.objects.filter(set=req_picset).order_by('id')
     return HttpResponse(json.dumps({'list':[p.serializable() for p in pics]}, indent=2), mimetype="application/json")
 
+def json_search(request):
+    query_string = ''
+    found_feeds = []
+    found_picsets = []
+    found_pics = []
+    query_keywords = []
+    if ('q' in request.GET) and request.GET['q'].strip():
+        query_string = request.GET['q']
+        feed_query = get_query(query_string, ['title', 'description',])
+        picset_query = get_query(query_string, ['title', 'description','keywords'])
+        pic_query = get_query(query_string, ['title', 'description','keywords'])
+        found_feeds = PicFeed.objects.filter(feed_query).order_by('-created')[:6]
+        found_picsets = PicSet.objects.filter(picset_query).order_by('-created')[:6]
+        found_pics = PicSet.objects.filter(pic_query).order_by('-created')[:6]
+        query_keywords = normalize_query(query_string)
+    
+    return HttpResponse(json.dumps({'matching_feeds':[feed.serializable() for feed in found_feeds],
+                                    'matching_picsets':[picset.serializable() for picset in found_picsets],
+                                    'matching_pics':[pic.serializable() for pic in found_pics],
+                                    'query_keywords':query_keywords,
+                                   }, indent=2), mimetype="application/json")
+
diff --git a/piccast/urls.py b/piccast/urls.py
index daa67da..51ba2d6 100644
--- a/piccast/urls.py
+++ b/piccast/urls.py
@@ -23,6 +23,7 @@ urlpatterns = patterns('',
     (r'^json/pics_by_set/(\d+)/', 'feeds.views.pics_by_set'),
     (r'^json/sets_by_feed/(\d+)/', 'feeds.views.sets_by_feed'),
     (r'^json/sets_by_feed/([-\w]+)/', 'feeds.views.sets_by_feedslug'),
+    (r'^json/search', 'feeds.views.json_search'),
     (r'^$', 'feeds.views.basic_frontpage'),
 )
 
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