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import os
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from datetime import datetime
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import time
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import email
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from glob import glob
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from gzip import GzipFile
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from StringIO import StringIO
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from noemie_format import NOEMIE
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from b2 import b2_transmission_settings
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DEFAULT_NOEMIE_DIRECTORY = '/var/lib/calebasse/B2/NOEMIE'
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NOEMIE_DIRECTORY = b2_transmission_settings.get('noemie_directory', DEFAULT_NOEMIE_DIRECTORY)
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def noemie_output_directory():
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if not os.path.isdir(NOEMIE_DIRECTORY):
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raise IOError('NOEMIE output directory (%s) is not a directory' % NOEMIE_DIRECTORY)
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if not os.access(NOEMIE_DIRECTORY, os.R_OK + os.X_OK):
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raise IOError('NOEMIE output directory (%s) is not readable (r-x)' % NOEMIE_DIRECTORY)
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return NOEMIE_DIRECTORY
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def noemie_try_gunzip(data):
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"gunzip data if it is a gzip stream"
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sio = StringIO(data)
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gz = GzipFile(fileobj=sio, mode='rb')
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try:
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data = gz.read()
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except IOError:
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pass
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return data
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def noemie_decode(data):
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lines = []
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entity = ''
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while data and entity != '999':
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entity = data[:3]
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analyzer = NOEMIE.get(entity)
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if analyzer is None:
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split = data.split('@',1)
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if len(split) < 2:
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raw, data = data, ''
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else:
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raw, data = split
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lines.append({
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'description': 'Error: unknown entity %s' % entity,
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'segments': [],
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'raw': raw,
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})
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continue
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line = { 'description': analyzer['description'] }
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segments = []
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index = 0
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for anaseg in analyzer.get('segments',[]):
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seg = {
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'name': anaseg['name'],
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}
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value = data[index : index+anaseg['size']]
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if anaseg.get('values'):
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seg['raw'] = value
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value = anaseg['values'].get(value)
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seg['value'] = value
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index += anaseg['size']
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segments.append(seg)
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line['segments'] = segments
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line['raw'] = data[:index]
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data = data[index:]
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lines.append(line)
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return lines
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def noemie_from_mail(name, with_data=True):
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filename = os.path.join(noemie_output_directory(), name)
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fp = open(filename, 'rb')
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try:
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mail = email.message_from_file(fp)
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except:
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fp.close()
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return None
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fp.close()
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noemie = [part for part in mail.walk() \
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if part.get_content_type().lower() == 'application/edi-consent']
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if not noemie:
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return None
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noemie = noemie[0] # only one NOEMIE part per email
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subject = mail.get('Subject')
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from_addr = mail.get('From')
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to_addr = mail.get('To')
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nature = noemie.get('Content-Description')
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if with_data:
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data = noemie.get_payload()
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if 'base64' == noemie.get('Content-Transfer-Encoding').lower():
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data = data.decode('base64')
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data = noemie_try_gunzip(data)
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data = noemie_decode(data)
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filedate = datetime.fromtimestamp(os.stat(filename).st_mtime)
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try:
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date = email.Utils.parsedate(mail.get('Date', mail.get('Delivery-date')))
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if isinstance(date, tuple):
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date = datetime.fromtimestamp(time.mktime(date))
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else:
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date = filedate
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except:
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date = filedate
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# TODO: try to get HealthCenter from from_addr
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result = {
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'name': name,
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'date': date,
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'from': from_addr,
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'to': to_addr,
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'subject': subject,
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'nature': nature,
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}
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if with_data:
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result['data'] = data
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return result
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def noemie_mails():
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mails = []
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for filename in glob(os.path.join(noemie_output_directory(), '*')):
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mail = noemie_from_mail(os.path.basename(filename), with_data=False)
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if mail:
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mails.append(mail)
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mails.sort(key=lambda x: x['date'], reverse=True)
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return mails
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