Code layout change.

[wolnelektury.git] / apps / waiter / models.py

diff --git a/apps/waiter/models.py b/apps/waiter/models.py
deleted file mode 100644 (file)
index 8b6ff94..0000000
--- a/apps/waiter/models.py
+++ /dev/null
@@ -1,69 +0,0 @@
-# -*- 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 os.path import join, isfile
-from django.core.urlresolvers import reverse
-from django.db import models
-from waiter.settings import WAITER_URL, WAITER_MAX_QUEUE
-from waiter.utils import check_abspath
-from picklefield import PickledObjectField
-
-
-class WaitedFile(models.Model):
-    path = models.CharField(max_length=255, unique=True, db_index=True)
-    task_id = models.CharField(max_length=128, db_index=True, null=True, blank=True)
-    task = PickledObjectField(null=True, editable=False)
-    description = models.CharField(max_length=255, null=True, blank=True)
-
-    @classmethod
-    def exists(cls, path):
-        """Returns opened file or None.
-        
-        `path` is relative to WAITER_ROOT.
-        Won't open a path leading outside of WAITER_ROOT.
-        """
-        abs_path = check_abspath(path)
-        # Pre-fetch objects for deletion to avoid minor race condition
-        relevant = [o.id for o in cls.objects.filter(path=path)]
-        if isfile(abs_path):
-            cls.objects.filter(id__in=relevant).delete()
-            return True
-        else:
-            return False
-
-    @classmethod
-    def can_order(cls, path):
-        return (cls.objects.filter(path=path).exists() or
-                cls.exists(path) or
-                cls.objects.count() < WAITER_MAX_QUEUE
-                )
-
-    def is_stale(self):
-        if self.task is None:
-            # Race; just let the other task roll. 
-            return False
-        if self.task.status not in (u'PENDING', u'STARTED', u'SUCCESS', u'RETRY'):
-            return True
-        return False
-
-    @classmethod
-    def order(cls, path, task_creator, description=None):
-        """
-        Returns an URL for the user to follow.
-        If the file is ready, returns download URL.
-        If not, starts preparing it and returns waiting URL.
-
-        task_creator: function taking a path and generating the file;
-        description: a string or string proxy with a description for user;
-        """
-        already = cls.exists(path)
-        if not already:
-            waited, created = cls.objects.get_or_create(path=path)
-            if created or waited.is_stale():
-                waited.task = task_creator(check_abspath(path))
-                waited.task_id = waited.task.task_id
-                waited.description = description
-                waited.save()
-            return reverse("waiter", args=[path])
-        return join(WAITER_URL, path)