def delete_topic_action(user_id, topic_id, comment=''):
""""
Args:
topic_id: integer
comment: string
Return:
Success: 0(int)
Failed: error_message(string)
TODO: limit the privilege of deleting large topics to only admin or user with good reputation.
"""
topic = Topic.objects.get(pk=topic_id)
if topic:
if topic.locked:
return '此话题已被锁定，只有管理员可以更改'
elif not topic.deleted:
topic.deleted = True
topic.save()
item_topic_set = Item_Topic.objects.filter(topic__id=topic.pk)
if item_topic_set:
# TODO how to improve efficiency of bulk updating
for item_topic in item_topic_set:
item_topic.topic_deleted = True
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent__id=topic.pk)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_deleted = True
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic.pk, operation='a').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='d')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='d', reference=reference, comment=comment)
topic_revision.topic_id = topic.pk
topic_revision.user_id = user_id
topic_revision.save()
return 0
else:
return '此话题已被删除'
else:
return '话题不存在'
def edit_language_set_root_action(user_id, topic_id, root_id):
"""Add/Modify an Enlish topic as language root;No root can be added for English topic"""
topic = Topic.objects.get(pk=topic_id)
root = Topic.objects.get(pk=root_id)
if topic.language == 'en' or root.language != 'en':
return '只能由非英语话题指向英语话题'
else:
previous_root = topic.language_set_root
topic.language_set_root = root
topic.save()
reference = None #Initialize
if previous_root:
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='ml').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='ml')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='ml', reference=reference)
topic_revision.topic_id = topic_id
if previous_root:
topic_revision.previous_root = previous_root
topic_revision.user_id = user_id
topic_revision.save()
return topic.pk
def delete_topic_alias_action(user_id, topic_id, alias):
""" return topic_id(int) if succeed, otherwise return error message"""
old_alias_set = Topic_Alias.objects.filter(topic__id=topic_id, alias=alias)
if old_alias_set:
old_alias = old_alias_set[0]
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='aa', alias=old_alias.alias).order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='da')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='da', reference=reference)
topic_revision.topic_id = topic_id
topic_revision.alias = old_alias.alias
topic_revision.user_id = user_id
topic_revision.save()
old_alias.delete()
return topic_id
else:
return '此别名不存在'
def add_topic_alias_action(user_id, topic_id, topic_name, alias):
"""return topic_alias.id(long) if succeed, otherwise return error message"""
if topic_name == alias:
return '别名不能与话题名相同'
if alias and SensitiveWord.objects.filter(name=alias, disabled=False):
return '根据当地法律，此别名不能被添加'
old_aliases = Topic_Alias.objects.filter(topic__id=topic_id, alias=alias)
if old_aliases:
return '此别名已经添加到此话题'
else:
topic_alias = Topic_Alias(alias=alias)
topic_alias.topic_id = topic_id
topic_alias.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='da', alias=topic_alias.alias).order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='aa')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='aa', reference=reference)
topic_revision.topic_id = topic_id
topic_revision.alias = topic_alias.alias
topic_revision.user_id = user_id
topic_revision.save()
return topic_alias.id
def delete_topic_parent_action(user_id, topic_id, parent_id):
"""return 0(int) if succeeded, otherwise return error message"""
topic_parent = Topic_Parent.objects.filter(topic__id=topic_id, parent__id=parent_id)
topic_parent.delete()
refs = Topic_Revision.objects.filter(topic__id=topic_id, parent__id=parent_id, operation='ap').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='dp')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='dp', reference=reference)
topic_revision.topic_id = topic_id
topic_revision.parent_id = parent_id
topic_revision.user_id = user_id
topic_revision.save()
return 0
def add_topic_parent_action(user_id, topic_id, parent_id=0, parent_name=''):
"""
Return parent_id(long) if succeed, otherwise return error message
@attention: Haoliang modified the return value
"""
#if paernt_id is passed, we use it directly later on; Otherwise we need to add topic and get parent_id
if not parent_id and not parent_name:
return '上级话题不能为空'
if parent_name:
parent_set = Topic.objects.filter(name=parent_name)
if parent_set and not parent_set[0].deleted:
parent_id = parent_set[0].pk
else:
return_value = add_topic_action(user_id, topic_name=parent_name)
if return_value['error_message']:
return return_value['error_message']
else:
parent_id = int(return_value['topic_id'])
if topic_id == parent_id:
return '不能将自身话题作为上级话题'
topic_childs = Topic_Parent.objects.filter(parent__id=topic_id)
for tc in topic_childs:
if parent_id == tc.topic_id:
return '不能将此话题下层话题作为上层话题'
topic_parent = Topic_Parent.objects.filter(topic__id=topic_id, parent__id=parent_id)
if topic_parent:
return '请勿输入重复的父母话题'
topic_parent = Topic_Parent()
topic_parent.topic_id = topic_id
topic_parent.parent_id = parent_id
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, parent__id=parent_id, operation='dp').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='ap')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='ap', reference=reference)
topic_revision.topic_id = topic_id
topic_revision.parent_id = parent_id
topic_revision.user_id = user_id
topic_revision.save()
return parent_id
def unmerge_topic_action(user_id, topic_id, comment=''):
""" return topic_id(int) if succeed, return error message if failed"""
topic = Topic.objects.get(pk=topic_id)
merged_to_id = topic.merged_to_id
if topic:
if topic.locked or topic.deleted:
return '此话题已被锁定或被删除'
elif topic.merged_to_id:
topic.merged_to_id = None
topic.save()
#Note: If topic A is merged to me, me is merged to topic B, then A is merged to B
#Now me unmerges from B, but let A stay merged to B
item_topic_set = Item_Topic.objects.filter(topic_merged_from__id=topic_id)
if item_topic_set:
for item_topic in item_topic_set:
item_topic.topic_id = item_topic.topic_merged_from_id
item_topic.topic_merged_from_id = None
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent_merged_from__id=topic_id)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_id = topic_parent.parent_merged_from_id
topic_parent.parent_merged_from_id = None
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='m').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='um')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='um', reference=reference, comment=comment)
topic_revision.topic_id = topic_id
topic_revision.user_id = user_id
topic_revision.merged_to_id = merged_to_id
topic_revision.save()
return topic_id
else:
return '此话题没被合并'
else:
return '话题不存在'
def add_topic_action(user_id, topic_id=0, topic_name='', comment=''):
"""
Used by add_topic(indirecly used by add_item_topic) and add_topic_parent; either topic_id or topic_name is passed.
if topic_id is passed, revert deleting this topic; \
if topic_name is passed, add this topic.
Return:
#. Success: return_value['topic_id'] (long type)
#. Failed: return_value['error_message'] (string)
"""
return_value = {}
return_value['error_message'] = ''
if not topic_id and not topic_name.strip():
return '话题名不能为空'
if topic_name:
#Get the topic by name since 1,the topic is deleted and not shown in query suggestion;
#2,Ajax is too slow to show it
topic_set = Topic.objects.filter(name=topic_name)
if topic_set:
topic = topic_set[0]
else:
topic = None
else:
topic = Topic.objects.get(pk=topic_id)
if topic:
if topic.locked:
return_value['error_message'] = '此话题已被锁定，只有管理员可以更改'
return return_value
elif topic.deleted: #undelete the topic
topic.deleted = False
topic.save()
item_topic_set = Item_Topic.objects.filter(topic__id=topic.pk)
if item_topic_set:
for item_topic in item_topic_set:
item_topic.topic_deleted = False
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent__id=topic.pk)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_deleted = False
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic.pk, operation='d').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='a')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic.pk
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='a', reference=reference, comment=comment)
topic_revision.topic_id = topic.pk
topic_revision.user_id = user_id
topic_revision.save()
return_value['topic_id'] = topic.pk
return return_value
else:
return_value['error_message'] = '此话题已存在'
return return_value
elif topic_name: #The topic name does not exist, add brand new topic
if len(topic_name) > 25: #Each Chinese character only counts 1 here
return_value['error_message'] = '话题名字过长'
return return_value
topic_with_alias_set = Topic_Alias.objects.filter(alias=topic_name)
if topic_with_alias_set:
topic_with_alias = topic_with_alias_set[0]
return_value['error_message'] = '此话题已作为话题' + topic_with_alias.topic.name.encode('utf-8') + '的别名存在'
return return_value
if SensitiveWord.objects.filter(name=topic_name, disabled=False):
return_value['error_message'] = '根据当地法律，此话题不能被添加'
return return_value
topic = Topic(name=topic_name)
#Automatically detects whether the language is in ASCII, if not, set to be Chinese
#TODO：Need to add ability of detecting more languages
is_English = True
for char in topic_name:
if ord(char) >= 128:
is_English = False
break
if is_English:
topic.language = 'en'
else:
topic.language = 'zh'
topic.creator_id = user_id
topic.follower_count = 1 #creator automatically follows this topic
topic.save()
user_topic = User_Topic()
user_topic.user_id = user_id
user_topic.topic_id = topic.pk
user_topic.save()
update_user_topic_fame(topic.pk, user_id)
topic_revision = Topic_Revision(operation='a')
topic_revision.topic_id = topic.pk
topic_revision.user_id = user_id
topic_revision.save()
return_value['topic_id'] = topic.pk
return return_value
else: #The passed in value is topic_id but it does not exist
return_value['error_message'] = '此话题不存在，不能重新添加'
return return_value
def merge_topic_action(user_id, topic_id, merged_to_id, comment=''):
"""All args are integer; return topic_id(int) if succeded, otherwise return error message"""
if topic_id == merged_to_id:
return '不能合并到自身话题'
topic = Topic.objects.get(pk=topic_id)
if topic:
if topic.locked or topic.deleted:
return '此话题已被锁定或被删除'
elif not topic.merged_to_id:
merge_to_topic = Topic.objects.get(pk=merged_to_id)
if not merge_to_topic or merge_to_topic.deleted:
return '要合并到的话题不存在或已被删除'
#Find the topic that should really be merged to;
#Should not be normal flow since merged topic won't show up in query suggestion, just in case
if merge_to_topic.merged_to_id:
merged_to_id = merge_to_topic.merged_to_id
topic.merged_to_id = merged_to_id
topic.save()
#Modify the topics that are merged to me
merge_to_me_topics = Topic.objects.filter(merged_to__id=topic_id)
if merge_to_me_topics:
for mt in merge_to_me_topics:
mt.merged_to_id = merged_to_id
mt.save()
item_topic_set = Item_Topic.objects.filter(topic__id=topic_id)
if item_topic_set:
for item_topic in item_topic_set:
existing_item_topic = Item_Topic.objects.filter(item__id=item_topic.item_id, topic__id=merged_to_id)
if not existing_item_topic:
item_topic.topic_merged_from_id = item_topic.topic_id
item_topic.topic_id = merged_to_id
item_topic.save()
topic_parent_set = Topic_Parent.objects.filter(parent__id=topic_id)
if topic_parent_set:
for topic_parent in topic_parent_set:
topic_parent.parent_merged_from_id = topic_parent.parent_id
topic_parent.parent_id = merged_to_id
topic_parent.save()
refs = Topic_Revision.objects.filter(topic__id=topic_id, operation='um').order_by('-pk')
if refs:
reference = refs[0]
if reference.user_id != user_id:
notification = Notification(operation='m')
notification.user_id = reference.user_id
notification.related_user_id = user_id
notification.topic_id = topic_id
notification.incr_count_in_profile()
notification.save()
update_user_topic_fame(topic_id, user_id, reference.user_id)
else:
reference = None
update_user_topic_fame(topic_id, user_id)
topic_revision = Topic_Revision(operation='m', reference=reference, comment=comment)
topic_revision.topic_id = topic_id
topic_revision.user_id = user_id
topic_revision.merged_to_id = merged_to_id
topic_revision.save()
return topic_id
else:
return '此话题已被合并，不能重复操作'
else:
return '话题不存在'
