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webmessage_mailutils.py
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Sat, May 4, 08:54

webmessage_mailutils.py
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# -*- coding: utf-8 -*-
## This file is part of Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
""" Library for quoting text, email style """
__revision__ = "$Id$"
from invenio.htmlutils import HTMLWasher
def email_quoted_txt2html(text,
tabs_before=0,
indent_txt='>>',
linebreak_txt="\n",
indent_html=('<div class="commentbox">', "</div>"),
linebreak_html='<br/>'):
"""
Takes a typical mail quoted text, e.g.:
hello,
you told me:
>> Your mother was a hamster and your father smelt of elderberries
I must tell you that I'm not convinced. Then in this discussion:
>>>> Is there someone else up there we could talk to?
>> No. Now, go away, or I shall taunt you a second time-a!
I think we're not going to be friends!
and return an html formatted output, e.g.:
hello,<br/>
you told me:<br/>
<div>
Your mother was a hamster and your father smelt of elderberries
</div>
I must tell you that I'm not convinced. Then in this discussion:
<div>
<div>
Is there someone else up there we could talk to?
</div>
No. Now, go away, or I shall taunt you a second time-a!
</div>
I think we're not going to be friends!
@param text: the text in quoted format
@param tabs_before: number of tabulations before each line
@param indent_txt: quote separator in email (default:'>>')
@param linebreak_txt: line separator in email (default: '\n')
@param indent_html: tuple of (opening, closing) html tags.
default: ('<div class="commentbox">', "</div>")
@param linebreak_html: line separator in html (default: '<br/>')
@return: string containing html formatted output
"""
washer = HTMLWasher()
final_body = ""
nb_indent = 0
text = text.strip('\n')
lines = text.split(linebreak_txt)
for line in lines:
new_nb_indent = 0
while True:
if line.startswith(indent_txt):
new_nb_indent += 1
line = line[len(indent_txt):]
else:
break
if (new_nb_indent > nb_indent):
for dummy in range(nb_indent, new_nb_indent):
final_body += tabs_before*"\t" + indent_html[0] + "\n"
tabs_before += 1
elif (new_nb_indent < nb_indent):
for dummy in range(new_nb_indent, nb_indent):
tabs_before -= 1
final_body += (tabs_before)*"\t" + indent_html[1] + "\n"
else:
final_body += (tabs_before)*"\t"
line = washer.wash(line)
final_body += tabs_before*"\t" + line
final_body += linebreak_html + "\n"
nb_indent = new_nb_indent
for dummy in range(0, nb_indent):
tabs_before -= 1
final_body += (tabs_before)*"\t" + "</div>\n"
return final_body
def email_quote_txt(text,
indent_txt='>>',
linebreak_input="\n",
linebreak_output="\n"):
"""
Takes a text and returns it in a typical mail quoted format, e.g.:
C'est un lapin, lapin de bois.
>>Quoi?
Un cadeau.
>>What?
A present.
>>Oh, un cadeau.
will return:
>>C'est un lapin, lapin de bois.
>>>>Quoi?
>>Un cadeau.
>>>>What?
>>A present.
>>>>Oh, un cadeau.
@param text: the string to quote
@param indent_txt: the string used for quoting (default: '>>')
@param linebreak_input: in the text param, string used for linebreaks
default: '\n'
@param linebreak_output: linebreak used for output
default: '\n'
@return: the text as a quoted string
"""
if (text == ""):
return ""
lines = text.split(linebreak_input)
text = ""
for line in lines:
text += indent_txt + line + linebreak_output
return text
def escape_email_quoted_text(text, indent_txt='>>', linebreak_txt='\n'):
"""Escape text using an email-like indenting rule.
As an example, this text:
>>Brave Sir Robin ran away...
<img src="malicious_script />*No!*
>>bravely ran away away...
I didn't!*<script>malicious code</script>
>>When danger reared its ugly head, he bravely turned his tail and fled.
<form onload="malicious"></form>*I never did!*
will be escaped like this:
>>Brave Sir Robin ran away...
&lt;img src="malicious_script /&gt;*No!*
>>bravely ran away away...
I didn't!*&lt;script&gt;malicious code&lt;/script&gt;
>>When danger reared its ugly head, he bravely turned his tail and fled.
&lt;form onload="malicious"&gt;&lt;/form&gt;*I never did!*
"""
washer = HTMLWasher()
lines = text.split(linebreak_txt)
output = ''
for line in lines:
line = line.strip()
nb_indent = 0
while True:
if line.startswith(indent_txt):
nb_indent += 1
line = line[len(indent_txt):]
else:
break
output += (nb_indent * indent_txt) + washer.wash(line, render_unallowed_tags=True) + linebreak_txt
nb_indent = 0
return output[:-1]

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