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6.1.36
by Curtis Hovey
Separate gracle MemoryStore to its own module. |
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__all__ = [ |
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'MemoryStore', |
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]
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import simplejson |
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from urlparse import parse_qs |
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from grackle.client import ( |
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MessageIdNotFound, |
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UnparsableDateRange, |
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UnsupportedDisplayType, |
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UnsupportedOrder, |
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)
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SUPPORTED_DISPLAY_TYPES = set(['all', 'text-only', 'headers-only']) |
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SUPPORTED_ORDERS = set( |
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['date', 'author', 'subject', 'thread_newest', 'thread_oldest', |
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'thread_subject']) |
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def threaded_messages(messages): |
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threads = {} |
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count = 0 |
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pending = [] |
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for message in messages: |
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if message.get('replies') is None: |
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threads[message['message_id']] = [message] |
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count += 1 |
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else: |
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pending.append(message) |
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for message in pending: |
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threads[message['replies']].append(message) |
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return threads.values() |
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class MemoryStore: |
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"""A memory-backed message store."""
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def __init__(self, messages): |
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"""Constructor."""
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self.messages = messages |
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@staticmethod
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def is_multipart(message): |
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return isinstance(message['body'], list) |
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def get_messages(self, archive_id, query_string): |
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"""Return matching messages.
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:param archive_id: The archive to retrieve from.
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:param query_string: Contains 'parameters', which is a JSON-format
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string describing parameters.
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"""
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query = parse_qs(query_string) |
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parameters = simplejson.loads(query['parameters'][0]) |
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order = parameters.get('order') |
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messages = self.messages[archive_id] |
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if order is not None: |
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if order not in SUPPORTED_ORDERS: |
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raise UnsupportedOrder |
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elif order.startswith('thread_'): |
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threaded = threaded_messages(messages) |
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messages = [] |
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if order == 'thread_subject': |
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threaded.sort(key=lambda t: t[0]['subject']) |
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if order == 'thread_oldest': |
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threaded.sort(key=lambda t: min(m['date'] for m in t)) |
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if order == 'thread_newest': |
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threaded.sort(key=lambda t: max(m['date'] for m in t)) |
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for thread in threaded: |
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messages.extend(thread) |
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else: |
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messages.sort(key=lambda m: m[order]) |
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display_type = parameters.get('display_type', 'all') |
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if display_type not in SUPPORTED_DISPLAY_TYPES: |
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raise UnsupportedDisplayType |
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if 'date_range' in parameters: |
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try: |
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start_date, end_date = parameters['date_range'].split('..') |
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if not start_date or not end_date: |
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raise UnparsableDateRange |
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except ValueError: |
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raise UnparsableDateRange |
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new_messages = [] |
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for message in messages: |
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if (not parameters['include_hidden'] and message['hidden']): |
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continue
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if ('message_ids' in parameters |
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and message['message_id'] not in parameters['message_ids']): |
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continue
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if ('date_range' in parameters |
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and (message['date'] < start_date |
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or message['date'] > end_date)): |
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continue
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message = dict(message) |
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if 'headers' in parameters: |
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headers = dict( |
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(k, v) for k, v in message['headers'].iteritems() |
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if k in parameters['headers']) |
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message['headers'] = headers |
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if display_type == 'headers-only': |
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del message['body'] |
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elif display_type == 'text-only' and self.is_multipart(message): |
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text_parts = [ |
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part.get_payload() for part in message['body'] |
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if part.get_content_type() == 'text/plain'] |
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message['body'] = '\n\n'.join(text_parts) |
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elif display_type == 'all' and self.is_multipart(message): |
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parts = [str(part.get_payload()) for part in message['body']] |
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message['body'] = '\n\n'.join(parts) |
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max_body = parameters.get('max_body_length') |
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if max_body is not None and display_type != 'headers-only': |
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message['body'] = message['body'][:max_body] |
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new_messages.append(message) |
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messages = new_messages |
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limit = parameters.get('limit', 100) |
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memo = parameters.get('memo') |
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message_id_indices = dict( |
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(m['message_id'], idx) for idx, m in enumerate(messages)) |
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if memo is None: |
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start = 0 |
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else: |
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start = message_id_indices[memo.encode('rot13')] |
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if start > 0: |
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previous_memo = messages[start - 1]['message_id'].encode('rot13') |
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else: |
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previous_memo = None |
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end = min(start + limit, len(messages)) |
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if end < len(messages): |
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next_memo = messages[end]['message_id'].encode('rot13') |
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else: |
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next_memo = None |
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messages = messages[start:end] |
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response = { |
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'messages': messages, |
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'next_memo': next_memo, |
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'previous_memo': previous_memo |
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}
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return response |
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def hide_message(self, archive_id, query_string): |
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"""Return matching messages.
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:param archive_id: The archive to retrieve from.
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:param query_string: Contains 'parameters', which is a JSON-format
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string describing parameters.
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"""
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query = parse_qs(query_string) |
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parameters = simplejson.loads(query['parameters'][0]) |
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message_id = parameters['message_id'] |
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hidden = parameters['hidden'] |
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messages = self.messages[archive_id] |
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for message in messages: |
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if message['message_id'] == message_id: |
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message['hidden'] = hidden |
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response = { |
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'message_id': message_id, |
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'hidden': hidden, |
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}
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return response |
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raise MessageIdNotFound |