--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKitTools/QueueStatusServer/model/attachment.py	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,141 @@
+# Copyright (C) 2009 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+# 
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import re
+
+from google.appengine.api import memcache
+
+from model.queues import queues, name_with_underscores
+from model.queuestatus import QueueStatus
+from model.workitems import WorkItems
+
+
+class Attachment(object):
+    @classmethod
+    def dirty(cls, attachment_id):
+        memcache.delete(str(attachment_id), namespace="attachment-summary")
+
+    @classmethod
+    def recent(cls, limit=1):
+        statuses = QueueStatus.all().order("-date")
+        # Notice that we use both a set and a list here to keep the -date ordering.
+        ids = []
+        visited_ids = set()
+        for status in statuses:
+            attachment_id = status.active_patch_id
+            if not attachment_id:
+                continue
+            if attachment_id in visited_ids:
+                continue
+            visited_ids.add(attachment_id)
+            ids.append(attachment_id)
+            if len(visited_ids) >= limit:
+                break
+        return map(cls, ids)
+
+    def __init__(self, attachment_id):
+        self.id = attachment_id
+        self._summary = None
+        self._cached_queue_positions = None
+
+    def summary(self):
+        if self._summary:
+            return self._summary
+        self._summary = memcache.get(str(self.id), namespace="attachment-summary")
+        if self._summary:
+            return self._summary
+        self._summary = self._fetch_summary()
+        memcache.set(str(self.id), self._summary, namespace="attachment-summary")
+        return self._summary
+
+    def state_from_queue_status(self, status):
+        table = {
+            "Pass" : "pass",
+            "Fail" : "fail",
+        }
+        state = table.get(status.message)
+        if state:
+            return state
+        if status.message.startswith("Error:"):
+            return "error"
+        if status:
+            return "pending"
+        return None
+
+    def position_in_queue(self, queue_name):
+        return self._queue_positions().get(queue_name)
+
+    def status_for_queue(self, queue_name):
+        underscore_queue_name = name_with_underscores(queue_name)
+        # summary() is a horrible API and should be killed.
+        queue_summary = self.summary().get(underscore_queue_name)
+        if not queue_summary:
+            return None
+        return queue_summary.get("status")
+
+    def bug_id(self):
+        return self.summary().get("bug_id")
+
+    def _queue_positions(self):
+        if self._cached_queue_positions:
+            return self._cached_queue_positions
+        # FIXME: Should we be mem-caching this?
+        self._cached_queue_positions = self._calculate_queue_positions()
+        return self._cached_queue_positions
+
+    def _calculate_queue_positions(self):
+        queue_positions = {}
+        for work_items in WorkItems.all().fetch(limit=len(queues)):
+            queue_name = str(work_items.queue_name)
+            try:
+                position = work_items.item_ids.index(self.id)
+                # Display 1-based indecies to the user.
+                queue_positions[queue_name] = position + 1
+            except ValueError, e:
+                queue_positions[queue_name] = None
+        return queue_positions
+
+    # FIXME: This is controller/view code and does not belong in a model.
+    def _fetch_summary(self):
+        summary = { "attachment_id" : self.id }
+
+        first_status = QueueStatus.all().filter('active_patch_id =', self.id).get()
+        if not first_status:
+            # We don't have any record of this attachment.
+            return summary
+        summary["bug_id"] = first_status.active_bug_id
+
+        for queue in queues:
+            summary[queue] = None
+            status = QueueStatus.all().filter('queue_name =', queue).filter('active_patch_id =', self.id).order('-date').get()
+            if status:
+                summary[name_with_underscores(queue)] = {
+                    "state": self.state_from_queue_status(status),
+                    "status": status,
+                }
+        return summary