bitbake: toaster: move most recent builds templating to client

The most recent builds area of the all builds and project builds
table needs to update as a build progresses. It also needs
additional functionality to show other states (e.g. recipe parsing,
queued) which again needs to update on the client side.

Rather than add to the existing mix of server-side templating
with client-side DOM updating, translate all of the server-side
templates to client-side ones (jsrender), and add logic which
updates the most recent builds area as the state of a build changes.

Add a JSON API for mostrecentbuilds, which returns the state of
all "recent" builds. Fetch this via Ajax from the build dashboard
(rather than fetching the ad hoc API as in the previous version).

Then, as new states for builds are fetched via Ajax, determine
whether the build state has changed completely, or whether the progress
has just updated. If the state completely changed, re-render the
template on the client side for that build. If only the progress
changed, just update the progress bar. (NB this fixes the
task progress bar so it works for the project builds and all builds
pages.)

In cases where the builds table needs to update as the result of
a build finishing, reload the whole page.

This work highlighted a variety of other issues, such as
build requests not being able to change state as necessary. This
was one part of the cause of the "cancelling build..." state
being fragile and disappearing entirely when the page refreshed.
The cancelling state now persists between page reloads, as the
logic for determining whether a build is cancelling is now on
the Build object itself.

Note that jsrender is redistributed as part of Toaster, so
a note was added to LICENSE to that effect.

[YOCTO #9631]

(Bitbake rev: c868ea036aa34b387a72ec5116a66b2cd863995b)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/api.py

@@ -27,7 +27,10 @@ from bldcontrol import bbcontroller
 from django.http import HttpResponse, JsonResponse
 from django.views.generic import View
 from django.core.urlresolvers import reverse
-
+from django.core import serializers
+from django.utils import timezone
+from django.template.defaultfilters import date
+from toastergui.templatetags.projecttags import json, sectohms, get_tasks
 
 def error_response(error):
     return JsonResponse({"error": error})
@@ -208,3 +211,103 @@ class XhrLayer(View):
             "error": "ok",
             "redirect": reverse('project', args=(kwargs['pid'],))
         })
+
+class MostRecentBuildsView(View):
+    def _was_yesterday_or_earlier(self, completed_on):
+        now = timezone.now()
+        delta = now - completed_on
+
+        if delta.days >= 1:
+            return True
+
+        return False
+
+    def get(self, request, *args, **kwargs):
+        """
+        Returns a list of builds in JSON format.
+        """
+        mrb_type = 'all'
+        project = None
+
+        project_id = request.GET.get('project_id', None)
+        if project_id:
+            try:
+                mrb_type = 'project'
+                project = Project.objects.get(pk=project_id)
+            except:
+                # if project lookup fails, assume no project
+                pass
+
+        recent_build_objs = Build.get_recent(project)
+        recent_builds = []
+
+        # for timezone conversion
+        tz = timezone.get_current_timezone()
+
+        for build_obj in recent_build_objs:
+            dashboard_url = reverse('builddashboard', args=(build_obj.pk,))
+            buildtime_url = reverse('buildtime', args=(build_obj.pk,))
+            rebuild_url = \
+                reverse('xhr_buildrequest', args=(build_obj.project.pk,))
+            cancel_url = \
+                reverse('xhr_buildrequest', args=(build_obj.project.pk,))
+
+            build = {}
+            build['id'] = build_obj.pk
+            build['dashboard_url'] = dashboard_url
+
+            tasks_complete_percentage = 0
+            if build_obj.outcome in (Build.SUCCEEDED, Build.FAILED):
+                tasks_complete_percentage = 100
+            elif build_obj.outcome == Build.IN_PROGRESS:
+                tasks_complete_percentage = build_obj.completeper()
+            build['tasks_complete_percentage'] = tasks_complete_percentage
+
+            build['state'] = build_obj.get_state()
+
+            build['errors'] = build_obj.errors.count()
+            build['dashboard_errors_url'] = dashboard_url + '#errors'
+
+            build['warnings'] = build_obj.warnings.count()
+            build['dashboard_warnings_url'] = dashboard_url + '#warnings'
+
+            build['buildtime'] = sectohms(build_obj.timespent_seconds)
+            build['buildtime_url'] = buildtime_url
+
+            build['rebuild_url'] = rebuild_url
+            build['cancel_url'] = cancel_url
+
+            build['is_default_project_build'] = build_obj.project.is_default
+
+            build['build_targets_json'] = \
+                json(get_tasks(build_obj.target_set.all()))
+
+            # convert completed_on time to user's timezone
+            completed_on = timezone.localtime(build_obj.completed_on)
+
+            completed_on_template = '%H:%M'
+            if self._was_yesterday_or_earlier(completed_on):
+                completed_on_template = '%d/%m/%Y ' + completed_on_template
+            build['completed_on'] = completed_on.strftime(completed_on_template)
+
+            targets = []
+            target_objs = build_obj.get_sorted_target_list()
+            for target_obj in target_objs:
+                if target_obj.task:
+                    targets.append(target_obj.target + ':' + target_obj.task)
+                else:
+                    targets.append(target_obj.target)
+            build['targets'] = ' '.join(targets)
+
+            # abbreviated form of the full target list
+            abbreviated_targets = ''
+            num_targets = len(targets)
+            if num_targets > 0:
+                abbreviated_targets = targets[0]
+            if num_targets > 1:
+                abbreviated_targets += (' +%s' % (num_targets - 1))
+            build['targets_abbreviated'] = abbreviated_targets
+
+            recent_builds.append(build)
+
+        return JsonResponse(recent_builds, safe=False)