[Findit] Enable project classifier and component classifier

appengine/findit/handlers/crash/crash_config.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Handles requests to the crash config page."""
 
 import json
+import pickle
+import re
+import zlib
 
 from google.appengine.api import users
 
 from common.base_handler import BaseHandler
 from common.base_handler import Permission
 from model.crash.crash_config import CrashConfig as CrashConfigModel
 
 
 class CrashConfig(BaseHandler):
   PERMISSION_LEVEL = Permission.ADMIN
 
   def HandleGet(self):
     settings = CrashConfigModel.Get()
 
     data = {
         'fracas': settings.fracas,
+        'component_classifier': settings.str_component_classifier,
+        'project_classifier': settings.project_classifier,
     }
 
     return {'template': 'crash/crash_config.html', 'data': data}
 
   def HandlePost(self):
     data = self.request.params.get('data')
     new_config_dict = json.loads(data)
+
+    component_config = new_config_dict['component_classifier']
+
+    # Convert the pattern strings to re compiled objects.
+    path_function_component = []
+    for path, function, component in component_config.get(
+        'path_function_component', []):
+      path_function_component.append((
+          re.compile(path),
+          re.compile(function) if function else None,
+          component))
+
+    if path_function_component:
+      component_config['path_function_component'] = path_function_component
+
+    # Compress component config since it may grow bigger.
+    new_config_dict['compressed_component_classifier'] = zlib.compress(
+        pickle.dumps(component_config))
+    # Delete the oringinal string component classifier settings since it's
+    # already be compressed 'compressed_component_classifier'.
+    del new_config_dict['component_classifier']
+
     CrashConfigModel.Get().Update(
         users.get_current_user(), users.IsCurrentUserAdmin(), **new_config_dict)
     return self.HandleGet()