#-*- python -*-
import logging
import json
from datetime import datetime
from cStringIO import StringIO
# Non-stdlib imports
from pylons import c
from ming.orm.ormsession import ThreadLocalORMSession
# Pyforge-specific imports
from allura import model as M
# Local imports
from forgetracker import model as TM
log = logging.getLogger(__name__)
class ImportException(Exception):
pass
class ResettableStream(object):
'''Class supporting seeks within a header of otherwise
unseekable stream.'''
# Seeks are supported with header of this size
HEADER_BUF_SIZE = 8192
def __init__(self, fp, header_size=-1):
self.fp = fp
self.buf = None
self.buf_size = header_size if header_size >= 0 else self.HEADER_BUF_SIZE
self.buf_pos = 0
self.stream_pos = 0
def read(self, size=-1):
if self.buf is None:
data = self.fp.read(self.buf_size)
self.buf = StringIO(data)
self.buf_len = len(data)
self.stream_pos = self.buf_len
data = ''
if self.buf_pos < self.stream_pos:
data = self.buf.read(size)
self.buf_pos += len(data)
if len(data) == size:
return data
size -= len(data)
data += self.fp.read(size)
self.stream_pos += len(data)
return data
def seek(self, pos):
if self.stream_pos > self.buf_len:
assert False, 'Started reading stream body, cannot reset pos'
self.buf.seek(pos)
self.buf_pos = pos
def tell(self):
if self.buf_pos < self.stream_pos:
return self.buf_pos
else:
return self.stream_pos
class ImportSupport(object):
ATTACHMENT_SIZE_LIMIT = 1024*1024
def __init__(self):
# Map JSON interchange format fields to Ticket fields
# key is JSON's field name, value is:
# None - drop
# True - map as is
# (new_field_name, value_convertor(val)) - use new field name and convert JSON's value
# handler(ticket, field, val) - arbitrary transform, expected to modify ticket in-place
self.FIELD_MAP = {
'assigned_to': ('assigned_to_id', self.get_user_id),
'class': None,
'date': ('created_date', self.parse_date),
'date_updated': ('mod_date', self.parse_date),
'description': True,
'id': None,
'keywords': ('labels', lambda s: s.split()), # default way of handling, see below for overrides
'status': True,
'submitter': ('reported_by_id', self.get_user_id),
'summary': True,
}
self.user_map = {}
self.warnings = []
self.errors = []
self.options = {}
def init_options(self, options_json):
self.options = json.loads(options_json)
opt_keywords = self.option('keywords_as', 'split_labels')
if opt_keywords == 'single_label':
self.FIELD_MAP['keywords'] = ('labels', lambda s: [s])
elif opt_keywords == 'custom':
del self.FIELD_MAP['keywords']
def option(self, name, default=None):
return self.options.get(name, False)
#
# Field/value convertors
#
@staticmethod
def parse_date(date_string):
return datetime.strptime(date_string, '%Y-%m-%dT%H:%M:%SZ')
def get_user_id(self, username):
username = self.options['user_map'].get(username, username)
u = M.User.by_username(username)
if u:
return u._id
return None
def custom(self, ticket, field, value):
field = '_' + field
if not c.app.has_custom_field(field):
log.warning('Custom field %s is not defined, defining as string', field)
c.app.globals.custom_fields.append(dict(name=field, label=field[1:].capitalize(), type='string'))
ThreadLocalORMSession.flush_all()
if 'custom_fields' not in ticket:
ticket['custom_fields'] = {}
ticket['custom_fields'][field] = value
#
# Object convertors
#
def make_artifact(self, ticket_dict):
remapped = {}
for f, v in ticket_dict.iteritems():
transform = self.FIELD_MAP.get(f, ())
if transform is None:
continue
elif transform is True:
remapped[f] = v
elif callable(transform):
transform(remapped, f, v)
elif transform is ():
self.custom(remapped, f, v)
else:
new_f, conv = transform
remapped[new_f] = conv(v)
ticket_num = ticket_dict['id']
existing_ticket = TM.Ticket.query.get(app_config_id=c.app.config._id,
ticket_num=ticket_num)
if existing_ticket:
ticket_num = c.app.globals.next_ticket_num()
self.warnings.append('Ticket #%s: Ticket with this id already exists, using next available id: %s' % (ticket_dict['id'], ticket_num))
else:
if c.app.globals.last_ticket_num < ticket_num:
c.app.globals.last_ticket_num = ticket_num
ThreadLocalORMSession.flush_all()
ticket = TM.Ticket(
app_config_id=c.app.config._id,
custom_fields=dict(),
ticket_num=ticket_num,
import_id=c.api_token.api_key)
ticket.update(remapped)
return ticket
def make_comment(self, thread, comment_dict):
ts = self.parse_date(comment_dict['date'])
comment = thread.post(text=comment_dict['comment'], timestamp=ts)
comment.author_id = self.get_user_id(comment_dict['submitter'])
comment.import_id = c.api_token.api_key
def make_attachment(self, org_ticket_id, ticket_id, att_dict):
import urllib2
if att_dict['size'] > self.ATTACHMENT_SIZE_LIMIT:
self.errors.append('Ticket #%s: Attachment %s (@ %s) is too large, skipping' %
(org_ticket_id, att_dict['filename'], att_dict['url']))
return
f = urllib2.urlopen(att_dict['url'])
TM.TicketAttachment.save_attachment(att_dict['filename'], ResettableStream(f),
artifact_id=ticket_id)
f.close()
#
# User handling
#
def collect_users(self, artifacts):
users = set()
for a in artifacts:
users.add(a['submitter'])
users.add(a['assigned_to'])
for c in a['comments']:
users.add(c['submitter'])
return users
def find_unknown_users(self, users):
unknown = set()
for u in users:
if u and not u in self.options['user_map'] and not M.User.by_username(u):
unknown.add(u)
return unknown
def make_user_placeholders(self, usernames):
for username in usernames:
allura_username = username
if self.option('create_users') != '_unprefixed':
allura_username = c.project.shortname + '-' + username
M.User.register(dict(username=allura_username,
display_name=username), False)
self.options['user_map'][username] = allura_username
ThreadLocalORMSession.flush_all()
log.info('Created %d user placeholders', len(usernames))
def validate_user_mapping(self):
if 'user_map' not in self.options:
self.options['user_map'] = {}
for foreign_user, allura_user in self.options['user_map'].iteritems():
u = M.User.by_username(allura_user)
if not u:
raise ImportException('User mapping %s:%s - target user does not exist' % (foreign_user, allura_user))
#
# Main methods
#
def validate_import(self, doc, options, **post_data):
log.info('validate_migration called: %s', doc)
self.init_options(options)
log.info('options: %s', self.options)
self.validate_user_mapping()
project_doc = json.loads(doc)
tracker_names = project_doc['trackers'].keys()
if len(tracker_names) > 1:
self.errors.append('Only single tracker import is supported')
return self.errors, self.warnings
artifacts = project_doc['trackers'][tracker_names[0]]['artifacts']
users = self.collect_users(artifacts)
unknown_users = self.find_unknown_users(users)
unknown_users = sorted(list(unknown_users))
if unknown_users:
self.warnings.append('''Document references unknown users. You should provide
option user_map to avoid losing username information. Unknown users: %s''' % unknown_users)
return {'status': True, 'errors': self.errors, 'warnings': self.warnings}
def perform_import(self, doc, options, **post_data):
log.info('import called: %s', options)
self.init_options(options)
self.validate_user_mapping()
project_doc = json.loads(doc)
tracker_names = project_doc['trackers'].keys()
if len(tracker_names) > 1:
self.errors.append('Only single tracker import is supported')
return self.errors, self.warnings
log.info('Import id: %s', c.api_token.api_key)
artifacts = project_doc['trackers'][tracker_names[0]]['artifacts']
if self.option('create_users'):
users = self.collect_users(artifacts)
unknown_users = self.find_unknown_users(users)
self.make_user_placeholders(unknown_users)
M.session.artifact_orm_session._get().skip_mod_date = True
for a in artifacts:
comments = a.pop('comments', [])
attachments = a.pop('attachments', [])
# log.info(a)
t = self.make_artifact(a)
for c_entry in comments:
self.make_comment(t.discussion_thread, c_entry)
for a_entry in attachments:
try:
self.make_attachment(a['id'], t._id, a_entry)
except Exception, e:
self.warnings.append('Could not import attachment, skipped: %s' % e)
log.info('Imported ticket: %d', t.ticket_num)
return {'status': True, 'errors': self.errors, 'warnings': self.warnings}