Daniel@0: /* Part of DML (Digital Music Laboratory)
Daniel@0: 	Copyright 2014-2015 Samer Abdallah, University of London
Daniel@0: 	 
Daniel@0: 	This program is free software; you can redistribute it and/or
Daniel@0: 	modify it under the terms of the GNU General Public License
Daniel@0: 	as published by the Free Software Foundation; either version 2
Daniel@0: 	of the License, or (at your option) any later version.
Daniel@0: 
Daniel@0: 	This program is distributed in the hope that it will be useful,
Daniel@0: 	but WITHOUT ANY WARRANTY; without even the implied warranty of
Daniel@0: 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Daniel@0: 	GNU General Public License for more details.
Daniel@0: 
Daniel@0: 	You should have received a copy of the GNU General Public
Daniel@0: 	License along with this library; if not, write to the Free Software
Daniel@0: 	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Daniel@0: */
Daniel@0: 
Daniel@0: :- module(csv_ui, []).
Daniel@0: 
Daniel@0: /** <module> UI for viewing CSV files
Daniel@0: */
Daniel@0: :- use_module(library(http/html_write)).
Daniel@0: :- use_module(library(http/html_head)).
Daniel@0: :- use_module(library(http/http_dispatch)).
Daniel@0: :- use_module(library(http/http_parameters)).
Daniel@0: :- use_module(library(decoration)).
Daniel@0: :- use_module(library(htmlutils), [paginator//3]).
Daniel@0: :- use_module(library(csvutils),  [uri_to_csv/2]).
Daniel@0: :- use_module(library(listutils), [drop/3,take/3]).
Daniel@0: :- use_module(components(table),  [table_from_goal//2]).
Daniel@0: :- use_module(components(icons)).
Daniel@0: :- use_module(cliopatria(hooks)).
Daniel@0: 
Daniel@0: :- set_prolog_flag(double_quotes,string).
Daniel@0: 
Daniel@0: :- http_handler(root(dml/csv/view), csv_view, []).
Daniel@0: 
Daniel@0: decoration:resource_view(URI,_) -->
Daniel@0:    { sub_string(URI,_,_,0,".csv") }, 
Daniel@0:    { http_link_to_id(archive_get,[uri(URI)],EntryURL) },
Daniel@0:    { http_link_to_id(csv_view,[uri(URI)],ViewURL) },
Daniel@0:    html_requires(font_awesome),
Daniel@0:    html([ a(href=EntryURL, [\icon(download)," Download"]), &('MediumSpace')
Daniel@0:         , a(href=ViewURL, [\icon(table)," View"])]).
Daniel@0: 
Daniel@0: decoration:resource_decoration(URI,Link) -->
Daniel@0:    { sub_string(URI,_,_,0,".csv") }, !, 
Daniel@0:    { http_link_to_id(csv_view,[uri(URI)],ViewURL) },
Daniel@0:    html_requires(font_awesome),
Daniel@0:    html( span( [ a(href(ViewURL),\icon(table))
Daniel@0:                , &(nbsp), \Link
Daniel@0:                ])).
Daniel@0: 
Daniel@0: csv_view(Request) :-
Daniel@0:    http_parameters(Request,
Daniel@0:       [  uri(URI,     [ optional(false), description("URI of CSV file")]) 
Daniel@0:       ,  page(Page,   [ nonneg, default(1) ]) 
Daniel@0:       ,  limit(Limit, [ nonneg, default(50) ])
Daniel@0:       ]),
Daniel@0:    uri_to_csv(URI,Rows),
Daniel@0:    length(Rows,Total),
Daniel@0:    Offset is Limit*(Page-1),
Daniel@0:    Pages is ceil(Total/Limit),
Daniel@0:    insist(Page=<Pages),
Daniel@0:    drop(Offset,Rows,Rows1),
Daniel@0:    insist(Page=Pages -> Rows1=Rows2; take(Limit,Rows1,Rows2)),
Daniel@0:    format(string(FullTitle),"CSV view for ~w",[URI]),
Daniel@0:    reply_html_page(cliopatria(demo), [title(FullTitle)],
Daniel@0:                    [ h1(FullTitle)
Daniel@0:                    , \paginator(csv_view-[uri(URI),limit(Limit)],Page,Pages)
Daniel@0:                    , \table_from_goal(csv_row(Rows2),[])
Daniel@0:                    , \paginator(csv_view-[uri(URI),limit(Limit)],Page,Pages)
Daniel@0:                    ]).
Daniel@0: 
Daniel@0: csv_row(Rows,Row) :- member(R,Rows), R=..[_|Row].
Daniel@0: