# HG changeset patch
# User neko259 <neko259@gmail.com>
# Date 2015-04-17 15:44:45
# Node ID 2a693c119a64f9a0ceeaa9dcd0aa60e71ea9d462
# Parent  08b1f6e610662f73a558bade243692e4ef96670c

Added ability to cache method result with additional arguments. Cache thread
reply count and images count

diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -122,7 +122,7 @@ class PostManager(models.Manager):
         for post in posts:
             post.delete()
 
-    @cached_result
+    @cached_result()
     def get_posts_per_day(self) -> float:
         """
         Gets average count of posts per day for the last 7 days
@@ -209,7 +209,7 @@ class Post(models.Model, Viewable):
 
         return self.get_thread().get_opening_post_id() == self.id
 
-    @cached_result
+    @cached_result()
     def get_url(self):
         """
         Gets full url to the post.
diff --git a/boards/models/thread.py b/boards/models/thread.py
--- a/boards/models/thread.py
+++ b/boards/models/thread.py
@@ -7,7 +7,7 @@ from django.db import models
 
 from boards import settings
 import boards
-from boards.utils import cached_result
+from boards.utils import cached_result, datetime_to_epoch
 from boards.models.post import Post
 from boards.models.tag import Tag
 
@@ -94,9 +94,14 @@ class Thread(models.Model):
             self.bumpable = False
             self.update_posts_time()
 
+    def _get_cache_key(self):
+        return [datetime_to_epoch(self.last_edit_time)]
+
+    @cached_result(key_method=_get_cache_key)
     def get_reply_count(self) -> int:
         return self.get_replies().count()
 
+    @cached_result(key_method=_get_cache_key)
     def get_images_count(self) -> int:
         return self.get_replies().annotate(images_count=Count(
             'images')).aggregate(Sum('images_count'))['images_count__sum']
@@ -152,6 +157,7 @@ class Thread(models.Model):
         return self.get_replies(view_fields_only).annotate(images_count=Count(
             'images')).filter(images_count__gt=0)
 
+    # TODO Do we still need this?
     def add_tag(self, tag: Tag):
         """
         Connects thread to a tag and tag to a thread
@@ -171,7 +177,7 @@ class Thread(models.Model):
 
         return opening_post
 
-    @cached_result
+    @cached_result()
     def get_opening_post_id(self) -> int:
         """
         Gets ID of the first thread post.
@@ -217,4 +223,4 @@ class Thread(models.Model):
         client.publish(channel_name, {
             WS_NOTIFICATION_TYPE: WS_NOTIFICATION_TYPE_NEW_POST,
             })
-        client.send()
\ No newline at end of file
+        client.send()
diff --git a/boards/templates/boards/thread.html b/boards/templates/boards/thread.html
--- a/boards/templates/boards/thread.html
+++ b/boards/templates/boards/thread.html
@@ -1,7 +1,6 @@
 {% extends "boards/base.html" %}
 
 {% load i18n %}
-{% load cache %}
 {% load static from staticfiles %}
 {% load board %}
 {% load tz %}
@@ -13,9 +12,6 @@
 
 {% block metapanel %}
 
-    {% get_current_language as LANGUAGE_CODE %}
-    {% get_current_timezone as TIME_ZONE %}
-
     <span class="metapanel"
           data-last-update="{{ last_update }}"
           data-ws-token-time="{{ ws_token_time }}"
@@ -27,12 +23,10 @@
         {% block thread_meta_panel %}
         {% endblock %}
 
-        {% cache 600 thread_meta thread.last_edit_time moderator LANGUAGE_CODE TIME_ZONE %}
         <span id="reply-count">{{ thread.get_reply_count }}</span>{% if thread.has_post_limit %}/{{ thread.max_posts }}{% endif %} {% trans 'messages' %},
             <span id="image-count">{{ thread.get_images_count }}</span> {% trans 'images' %}.
             {% trans 'Last update: ' %}<span id="last-update"><time datetime="{{ thread.last_edit_time|date:'c' }}">{{ thread.last_edit_time }}</time></span>
             [<a href="rss/">RSS</a>]
-        {% endcache %}
     </span>
 
 {% endblock %}
diff --git a/boards/utils.py b/boards/utils.py
--- a/boards/utils.py
+++ b/boards/utils.py
@@ -3,6 +3,8 @@ This module contains helper functions an
 """
 import time
 import hmac
+import functools
+
 from django.core.cache import cache
 from django.db.models import Model
 
@@ -11,9 +13,7 @@ from django.utils import timezone
 from neboard import settings
 
 
-KEY_CAPTCHA_FAILS = 'key_captcha_fails'
-KEY_CAPTCHA_DELAY_TIME = 'key_captcha_delay_time'
-KEY_CAPTCHA_LAST_ACTIVITY = 'key_captcha_last_activity'
+CACHE_KEY_DELIMITER = '_'
 
 
 def get_client_ip(request):
@@ -46,24 +46,31 @@ def get_websocket_token(user_id='', time
     return token
 
 
-def cached_result(function):
+def cached_result(key_method=None):
     """
     Caches method result in the Django's cache system, persisted by object name,
     object name and model id if object is a Django model.
     """
-    def inner_func(obj, *args, **kwargs):
-        # TODO Include method arguments to the cache key
-        cache_key = obj.__class__.__name__ + '_' + function.__name__
-        if isinstance(obj, Model):
-            cache_key += '_' + str(obj.id)
+    def _cached_result(function):
+        def inner_func(obj, *args, **kwargs):
+            # TODO Include method arguments to the cache key
+            cache_key_params = [obj.__class__.__name__, function.__name__]
+            if isinstance(obj, Model):
+                cache_key_params.append(str(obj.id))
+
+            if key_method is not None:
+                cache_key_params += [str(arg) for arg in key_method(obj)]
+
+            cache_key = CACHE_KEY_DELIMITER.join(cache_key_params)
 
-        persisted_result = cache.get(cache_key)
-        if persisted_result:
-            result = persisted_result
-        else:
-            result = function(obj, *args, **kwargs)
-            cache.set(cache_key, result)
+            persisted_result = cache.get(cache_key)
+            if persisted_result is not None:
+                result = persisted_result
+            else:
+                result = function(obj, *args, **kwargs)
+                cache.set(cache_key, result)
 
-        return result
+            return result
 
-    return inner_func
+        return inner_func
+    return _cached_result