[Findit] Updating try job dashboard to display in queue and execution times

appengine/findit/handlers/try_job_dashboard.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.
 from datetime import datetime
 from datetime import time
 from datetime import timedelta
 
 from common.base_handler import BaseHandler
 from common.base_handler import Permission
 from model.wf_try_job_data import WfTryJobData
 
 
+NOT_AVAILABLE = 'N/A'
+
+
 # TODO(lijeffrey): Refactor formatting functions into a separate module that
 # can be shared across Findit.
 def _RemoveMicrosecondsFromDelta(delta):
   """Returns a timedelta object without microseconds based on delta."""
   return delta - timedelta(microseconds=delta.microseconds)
 
 
+def _FormatDuration(start_time, end_time):
+  if not start_time or not end_time:
+    return NOT_AVAILABLE
+  return _FormatTimedelta(end_time - start_time)
+
+
 def _FormatTimedelta(delta):
-  if not delta:
-    return None
   hours, remainder = divmod(delta.seconds, 3600)
   minutes, seconds = divmod(remainder, 60)
   return '%02d:%02d:%02d' % (hours, minutes, seconds)
 
 
 def _FormatDatetime(date):
   if not date:
     return None
   else:
     return date.strftime('%Y-%m-%d %H:%M:%S UTC')
@@ skipping 20 matching lines @@
       try_job_query = WfTryJobData.query(
           WfTryJobData.request_time >= start_date,
           WfTryJobData.request_time < end_date)
     else:  # pragma: no cover
       # If no start date specified, then get everything up until end_date.
       start_date = None
       try_job_query = WfTryJobData.query(
           WfTryJobData.request_time < end_date)
 
     try_job_data_list = try_job_query.fetch()
+
+    # Sort try job data list by most recent request first.
+    try_job_data_list.sort(key=lambda x: x.request_time, reverse=True)
+
     try_jobs_in_progress = []
     try_jobs_with_error = []
     successfully_completed_try_jobs = []
 
     for try_job_data in try_job_data_list:
       try_job_display_data = {
           'master_name': try_job_data.master_name,
           'builder_name': try_job_data.builder_name,
           'build_number': try_job_data.build_number,
           'try_job_type': try_job_data.try_job_type,
-          'start_time': _FormatDatetime(try_job_data.start_time),
+          'pending_time': _FormatDuration(
+              try_job_data.request_time, try_job_data.start_time),
           'request_time': _FormatDatetime(try_job_data.request_time),
           'try_job_url': try_job_data.try_job_url
       }
 
       if not try_job_data.end_time and not try_job_data.error:
         try_job_display_data['elapsed_time'] = (
-            _FormatTimedelta(datetime.utcnow() - try_job_data.request_time) if
+            _FormatDuration(try_job_data.request_time, datetime.utcnow()) if
             try_job_data.request_time else None)
-
         try_job_display_data['status'] = (
             'running' if try_job_data.start_time else 'pending')
         try_jobs_in_progress.append(try_job_display_data)
       elif try_job_data.error:
         try_job_display_data['error'] = try_job_data.error['message']
         # It is possible end_time is not available if the error was timeout.
-        try_job_display_data['end_time'] = _FormatDatetime(
-            try_job_data.end_time)
+        try_job_display_data['execution_time'] = _FormatDuration(
+            try_job_data.start_time, try_job_data.end_time)
         try_jobs_with_error.append(try_job_display_data)
       else:
         try_job_display_data['culprit_found'] = bool(try_job_data.culprits)
-        try_job_display_data['end_time'] = (
-            _FormatDatetime(try_job_data.end_time))
+        try_job_display_data['execution_time'] = _FormatDuration(
+            try_job_data.start_time, try_job_data.end_time)
         successfully_completed_try_jobs.append(try_job_display_data)
 
     data = {
         'start_date': _FormatDatetime(start_date),
         'end_date': _FormatDatetime(end_date),
         'try_jobs_in_progress': try_jobs_in_progress,
         'try_jobs_with_error': try_jobs_with_error,
         'successfully_completed_try_jobs': successfully_completed_try_jobs
     }
 
     return {
         'template': 'try_job_dashboard.html',
         'data': data
     }