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from forum import const
def format_mention_in_html(mentioned_user):
url = mentioned_user.get_profile_url()
username = mentioned_user.username
return '<a href="%s">@%s</a>' % (url, username)
def extract_first_matching_mentioned_author(text, anticipated_authors):
if len(text) == 0:
return None, ''
for a in anticipated_authors:
if text.startswith(a.username):
ulen = len(a.username)
if len(text) == ulen:
text = ''
elif text[ulen] in const.TWITTER_STYLE_MENTION_TERMINATION_CHARS:
text = text[ulen:]
else:
#near miss, here we could insert a warning that perhaps
#a termination character is needed
continue
return a, text
return None, text
def extract_mentioned_name_seeds(text):
extra_name_seeds = set()
while '@' in text:
pos = text.index('@')
text = text[pos+1:]#chop off prefix
name_seed = ''
for c in text:
if c in const.TWITTER_STYLE_MENTION_TERMINATION_CHARS:
extra_name_seeds.add(name_seed)
name_seed = ''
break
if len(name_seed) > 10:
extra_name_seeds.add(name_seed)
name_seed = ''
break
if c == '@':
if len(name_seed) > 0:
extra_name_seeds.add(name_seed)
name_seed = ''
break
name_seed += c
if len(name_seed) > 0:
#in case we run off the end of text
extra_name_seeds.add(name_seed)
return extra_name_seeds
def mentionize_text(text, anticipated_authors):
output = ''
mentioned_authors = list()
while '@' in text:
#the purpose of this loop is to convert any occurance of '@mention ' syntax
#to user account links leading space is required unless @ is the first
#character in whole text, also, either a punctuation or a ' ' char is required
#after the name
pos = text.index('@')
#save stuff before @mention to the output
output += text[:pos]#this works for pos == 0 too
if len(text) == pos + 1:
#finish up if the found @ is the last symbol
output += '@'
text = ''
break
if pos > 0:
if text[pos-1] in const.TWITTER_STYLE_MENTION_TERMINATION_CHARS:
#if there is a termination character before @mention
#indeed try to find a matching person
text = text[pos+1:]
mentioned_author, text = extract_first_matching_mentioned_author(
text,
authors
)
if mentioned_author:
mentioned_authors.append(mentioned_author)
output += format_mention_in_html(mentioned_author)
else:
output += '@'
else:
#if there isn't, i.e. text goes like something@mention, do not look up people
output += '@'
text = text[pos+1:]
else:
#do this if @ is the first character
text = text[1:]
mentioned_author, text = extract_first_matching_mentioned_name(text, authors)
if mentioned_author:
mentioned_authors.append(mentioned_author)
output += format_mention_in_html(mentioned_author)
else:
output += '@'
#append the rest of text that did not have @ symbols
output += text
return mentioned_authors, output
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