enabled the patterns app

Author: takinbo

patterns/__init__.py

@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+# vim: ai ts=4 sts=4 et sw=4
+
+from django.contrib import admin
+from patterns.models import *
+
+class PatternAdmin(admin.ModelAdmin):
+    list_display = ['name', 'regex']
+
+admin.site.register(Pattern, PatternAdmin)

patterns/admin.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+# vim: ai ts=4 sts=4 et sw=4
+
+
+from django.db import models
+
+
+class Pattern(models.Model):
+    name = models.CharField(max_length=160)
+    regex = models.CharField(max_length=160)
+
+    @staticmethod
+    def join(patterns):
+        '''Joins a set of passed in patterns, assumed to be the result of a 
+           ManyToMany field foreign key from some other object'''
+        # fix any patterns we just or-ed together so they are the kind of or we want
+        # e.g., (\w+)|(\d+) => (\w+|\d+)
+        # TODO figure out how to handle non-captured matches
+        # e.g., (?:\w+)|(\d+) => (?:\w+)|(\d+) and then zip up tokens correctly
+        regex = '|'.join(patterns.values_list('regex', flat=True))
+        return regex.replace(')|(', '|')
+
+    def __unicode__(self):
+        return "%s %s" % (self.name, self.regex)

patterns/models.py

@@ -184,6 +184,7 @@
     # External apps
     "django_tables2",
     "selectable",
+    "patterns",
     "locations",
     # RapidSMS
     "rapidsms",