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bfe_video_platform_downloads.py
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Fri, Aug 30, 16:36
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text/x-python
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Sun, Sep 1, 16:36 (2 d)
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blob
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R3600 invenio-infoscience
bfe_video_platform_downloads.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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.
"""BibFormat element
* Part of the Video Platform Prototype
* Generates a list of links to download videos directly
* The list includes the codec/container, subformat/resolution and file size
"""
from
invenio.bibdocfile
import
BibRecDocs
html_skeleton_popup
=
"""<!-- DOWNLOAD POPUP -->
<div id="video_download_popup_box">
%(elements)s
</div>
"""
html_skeleton_element
=
"""<!-- DOWNLOAD POPUP ELEMENT -->
<div class="video_download_popup_element">
<a href="%(video_url)s">
<div class="video_download_popup_element_codec">
%(video_codec)s
</div>
<div class="video_download_popup_element_filesize">
%(video_size)s
</div>
<div class="video_download_popup_element_resolution">
%(video_resolution)s
</div>
</a>
</div>
"""
def
format_element
(
bfo
):
"""Format Element Function"""
return
create_download_popup
(
bfo
)
def
create_download_popup
(
bfo
):
"""Create the complete download popup"""
elements
=
[]
recdoc
=
BibRecDocs
(
bfo
.
recID
)
bibdocs
=
recdoc
.
list_bibdocs
()
## Go through all the BibDocs and search for video related signatures
for
bibdoc
in
bibdocs
:
bibdocfiles
=
bibdoc
.
list_all_files
()
for
bibdocfile
in
bibdocfiles
:
## When a video signature is found, add it as an element
if
bibdocfile
.
get_superformat
()
in
(
'.mp4'
,
'.webm'
,
'.ogv'
,
'.mov'
,
'.wmv'
,
'.avi'
,
'.mpeg'
,
'.flv'
,
'.mkv'
):
url
=
bibdocfile
.
get_url
()
codec
=
bibdocfile
.
get_superformat
()[
1
:]
resolution
=
bibdocfile
.
get_subformat
()
size
=
bibdocfile
.
get_size
()
elements
.
append
(
create_download_element
(
url
,
codec
,
size
,
resolution
))
if
elements
:
return
html_skeleton_popup
%
{
'elements'
:
"
\n
"
.
join
(
elements
)
}
else
:
return
""
def
create_download_element
(
url
,
codec
,
size
,
resolution
):
"""Creates an HTML element based on the element skeleton"""
return
html_skeleton_element
%
{
'video_url'
:
url
+
"&download=1"
,
'video_codec'
:
codec
.
upper
(),
'video_size'
:
human_size
(
size
),
'video_resolution'
:
resolution
}
def
human_size
(
byte_size
):
for
x
in
[
'bytes'
,
'KB'
,
'MB'
,
'GB'
,
'TB'
]:
if
byte_size
<
1024.0
:
return
"
%3.1f
%s
"
%
(
byte_size
,
x
)
byte_size
/=
1024.0
def
escape_values
(
bfo
):
"""
Called by BibFormat in order to check if output of this element
should be escaped.
"""
return
0
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