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websearch_external_collections_templates.py
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Sun, May 5, 08:51

websearch_external_collections_templates.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.
"""Template for the external collections search."""
__revision__ = "$Id$"
import cgi
from invenio.config import CFG_SITE_LANG
from invenio.messages import gettext_set_language
from invenio.urlutils import create_html_link
class Template:
"""Template class for the external collection search. To be loaded with template.load()"""
def __init__(self):
pass
def external_collection_seealso_box(self, lang, links,
prolog_start='<table class="externalcollectionsbox"><tr><th colspan="2" class="externalcollectionsboxheader">',
prolog_end='</th></tr><tr><td class="externalcollectionsboxbody">',
column_separator='</td><td class="externalcollectionsboxbody">',
link_separator= '<br />', epilog='</td></tr></table>'):
"""Creates the box that proposes links to other useful search engines like Google.
lang: string - The language to display in
links: list of string - List of links to display in the box
prolog_start, prolog_end, column_separator, link_separator, epilog': strings -
default HTML code for the specified position in the box"""
_ = gettext_set_language(lang)
out = ""
if links:
out += '<a name="externalcollectionsbox"></a>'
out += prolog_start
out += _("Haven't found what you were looking for? Try your search on other servers:")
out += prolog_end
nb_out_links_in_one_column = len(links)/2 + len(links) % 2
out += link_separator.join(links[:nb_out_links_in_one_column])
out += column_separator
out += link_separator.join(links[nb_out_links_in_one_column:])
out += epilog
return out
def external_collection_overview(self, lang=CFG_SITE_LANG, engine_list=()):
"""Prints results overview box with links to particular collections below.
lang: The language to display
engine_list: The external engines to be used"""
if len(engine_list) < 1:
return ""
_ = gettext_set_language(lang)
out = """
<table class="externalcollectionsresultsbox">
<thead>
<tr>
<th class="externalcollectionsresultsboxheader"><strong>%s</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td class="externalcollectionsresultsboxbody"> """ % _("External collections results overview:")
for engine in engine_list:
internal_name = get_link_name(engine.name)
name = _(engine.name)
out += """<strong><a href="#%(internal_name)s">%(name)s</a></strong><br />""" % locals()
out += """
</td>
</tr>
</tbody>
</table>
"""
return out
def print_info_line(req,
html_external_engine_name_box,
html_external_engine_nb_results_box,
html_external_engine_nb_seconds_box):
"""Print on req an information line about results of an external collection search."""
req.write('<table class="externalcollectionsresultsbox"><tr>')
req.write('<td class="externalcollectionsresultsboxheader">')
req.write('<big><strong>' + \
html_external_engine_name_box + \
'</strong></big>')
req.write('&nbsp;&nbsp;&nbsp;')
req.write(html_external_engine_nb_results_box)
req.write('</td><td class="externalcollectionsresultsboxheader" width="20%" align="right">')
req.write('<small>' + \
html_external_engine_nb_seconds_box + \
'</small>')
req.write('</td></tr></table><br />')
def print_timeout(req, lang, engine, name, url):
"""Print info line for timeout."""
_ = gettext_set_language(lang)
req.write('<a name="%s"></a>' % get_link_name(engine.name))
print_info_line(req,
create_html_link(url, {}, name, {}, False, False),
'',
_('Search timed out.'))
message = _("The external search engine has not responded in time. You can check its results here:")
req.write(message + ' ' + create_html_link(url, {}, name, {}, False, False) + '<br />')
def get_link_name(name):
"""Return a hash string for the string name."""
return hex(abs(name.__hash__()))
def print_results(req, lang, pagegetter, infos, current_time):
"""Print results of a given search engine.
current_time is actually the duration, expressed in seconds of execution of request.
"""
_ = gettext_set_language(lang)
url = infos[0]
engine = infos[1]
internal_name = get_link_name(engine.name)
name = _(engine.name)
base_url = engine.base_url
results = engine.parser.parse_and_get_results(pagegetter.data)
html_tit = make_url(name, base_url)
num = format_number(engine.parser.parse_num_results())
if num:
if num == '0':
html_num = _('No results found.')
html_sec = ''
else:
html_num = '<strong>' + \
make_url(_('%s results found') % num, url) + \
'</strong>'
html_sec = '(' + _('%s seconds') % ('%2.2f' % current_time) + ')'
else:
html_num = _('No results found.')
html_sec = ''
req.write('<a name="%(internal_name)s"></a>' % locals())
print_info_line(req,
html_tit,
html_num,
html_sec)
for result in results:
req.write(result.html + '<br />')
if not results:
req.write(_('No results found.') + '<br />')
def make_url(name, url):
if url:
return '<a href="' + cgi.escape(url) + '">' + name + '</a>'
else:
return name
def format_number(num, separator=','):
"""Format a number by separating thousands with a separator (by default a comma)
>>> format_number(10)
'10'
>>> format_number(10000)
'10,000'
>>> format_number(' 000213212424249 ', '.')
'213.212.424.249'
"""
result = ""
try:
num = int(num)
except:
return None
if num == 0:
return '0'
while num > 0:
part = num % 1000
num = num / 1000
result = "%03d" % part + separator + result
return result.strip('0').strip(separator)

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