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# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""View support classes for the bazaar application."""
__metaclass__ = type
__all__ = [
'BazaarApplicationView',
'BazaarProductView',
]
from datetime import datetime
import bzrlib
from zope.component import getUtility
from canonical.config import config
from canonical.launchpad.webapp import (
canonical_url,
LaunchpadView,
)
from canonical.launchpad.webapp.authorization import (
precache_permission_for_objects,
)
from lp.code.enums import CodeImportReviewStatus
from lp.code.interfaces.branch import (
IBranchCloud,
IBranchSet,
)
from lp.code.interfaces.branchcollection import IAllBranches
from lp.code.interfaces.codeimport import ICodeImportSet
from lp.registry.interfaces.product import IProductSet
from lp.services.propertycache import cachedproperty
class BazaarApplicationView(LaunchpadView):
page_title = 'Launchpad Branches'
@property
def branch_count(self):
"""Return the number of public branches."""
return getUtility(IAllBranches).visibleByUser(None).count()
@property
def product_count(self):
return getUtility(IProductSet).getProductsWithBranches().count()
@property
def import_count(self):
return getUtility(ICodeImportSet).search(
review_status=CodeImportReviewStatus.REVIEWED).count()
@property
def bzr_version(self):
return bzrlib.__version__
def _precacheViewPermissions(self, branches):
"""Precache the launchpad.View permissions on the branches."""
# XXX: TimPenhey 2009-06-08 bug=324546
# Until there is an API to do this nicely, shove the launchpad.view
# permission into the request cache directly.
precache_permission_for_objects(
self.request, 'launchpad.View', branches)
return branches
@cachedproperty
def recently_changed_branches(self):
"""Return the five most recently changed branches."""
return self._precacheViewPermissions(
list(getUtility(IBranchSet).getRecentlyChangedBranches(
5, visible_by_user=self.user)))
@cachedproperty
def recently_imported_branches(self):
"""Return the five most recently imported branches."""
return self._precacheViewPermissions(
list(getUtility(IBranchSet).getRecentlyImportedBranches(
5, visible_by_user=self.user)))
@cachedproperty
def recently_registered_branches(self):
"""Return the five most recently registered branches."""
return self._precacheViewPermissions(
list(getUtility(IBranchSet).getRecentlyRegisteredBranches(
5, visible_by_user=self.user)))
@cachedproperty
def short_product_tag_cloud(self):
"""Show a preview of the product tag cloud."""
return BazaarProductView(None, None).products(
num_products=config.launchpad.code_homepage_product_cloud_size)
class ProductInfo:
def __init__(self, name, commits, author_count, size, elapsed):
self.name = name
self.url = '/' + name
self.commits = commits
self.author_count = author_count
self.size = size
self.elapsed_since_commit = elapsed
@property
def tag_class(self):
return "cloud-size-%s" % self.size
@property
def time_darkness(self):
if self.elapsed_since_commit is None:
return "light"
if self.elapsed_since_commit.days < 7:
return "dark"
if self.elapsed_since_commit.days < 14:
return "medium"
return "light"
@property
def html_class(self):
return "%s cloud-%s" % (self.tag_class, self.time_darkness)
@property
def html_title(self):
if self.commits == 1:
size = "1 commit"
else:
size = "%d commits" % self.commits
if self.author_count == 1:
who = "1 person"
else:
who = "%s people" % self.author_count
if self.elapsed_since_commit.days == 0:
commit = "last commit less than a day old"
elif self.elapsed_since_commit.days == 1:
commit = "last commit one day old"
else:
commit = (
"last commit %d days old" % self.elapsed_since_commit.days)
return "%s by %s, %s" % (size, who, commit)
class BazaarProjectsRedirect(LaunchpadView):
"""Redirect the user to /projects on the code rootsite."""
def initialize(self):
# Redirect to the caller to the new location.
product_set = getUtility(IProductSet)
redirect_url = canonical_url(product_set, rootsite="code")
# Moved permanently.
self.request.response.redirect(redirect_url, status=301)
class BazaarProductView(LaunchpadView):
"""Browser class for products gettable with Bazaar."""
page_title = 'Projects with active branches'
def _make_distribution_map(self, values, percentile_map):
"""Given some values and a map of percentiles to other values, return
a function that will take a value in the same domain as 'values' and
map it to a value in the 'percentile_map' dict.
There *must* be a percentile_map entry for 1.0.
"""
def constrained_minimum(xs, a):
"""Return the smallest value of 'xs' strictly bigger than 'a'."""
return min(x for x in xs if x > a)
cutoffs = percentile_map.keys()
num_values = float(len(values))
value_to_cutoffs = {}
for index, value in enumerate(values):
cutoff = constrained_minimum(cutoffs, (index / num_values))
value_to_cutoffs[value] = percentile_map[cutoff]
if num_values > 0 and 1 in percentile_map:
value_to_cutoffs[values[-1]] = percentile_map[1]
return value_to_cutoffs
def products(self, num_products=None):
# The product_info ends up sorted on product name, as the product name
# is the first item of the tuple returned, and is guaranteed to be
# unique by the sql query.
product_info = sorted(
getUtility(IBranchCloud).getProductsWithInfo(num_products))
if len(product_info) == 0:
return
now = datetime.today()
counts = sorted(zip(*product_info)[1])
size_mapping = {
0.2: 'smallest',
0.4: 'small',
0.6: 'medium',
0.8: 'large',
1.0: 'largest',
}
num_commits_to_size = self._make_distribution_map(
counts, size_mapping)
for name, commits, author_count, last_revision_date in product_info:
size = num_commits_to_size[commits]
elapsed = now - last_revision_date
yield ProductInfo(name, commits, author_count, size, elapsed)
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