diff cpack/dml/applications/csv_ui.pl @ 0:718306e29690 tip

commiting public release

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpack/dml/applications/csv_ui.pl	Tue Feb 09 21:05:06 2016 +0100
@@ -0,0 +1,77 @@
+/* Part of DML (Digital Music Laboratory)
+	Copyright 2014-2015 Samer Abdallah, University of London
+	 
+	This program 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.
+
+	This program 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 this library; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+:- module(csv_ui, []).
+
+/** <module> UI for viewing CSV files
+*/
+:- use_module(library(http/html_write)).
+:- use_module(library(http/html_head)).
+:- use_module(library(http/http_dispatch)).
+:- use_module(library(http/http_parameters)).
+:- use_module(library(decoration)).
+:- use_module(library(htmlutils), [paginator//3]).
+:- use_module(library(csvutils),  [uri_to_csv/2]).
+:- use_module(library(listutils), [drop/3,take/3]).
+:- use_module(components(table),  [table_from_goal//2]).
+:- use_module(components(icons)).
+:- use_module(cliopatria(hooks)).
+
+:- set_prolog_flag(double_quotes,string).
+
+:- http_handler(root(dml/csv/view), csv_view, []).
+
+decoration:resource_view(URI,_) -->
+   { sub_string(URI,_,_,0,".csv") }, 
+   { http_link_to_id(archive_get,[uri(URI)],EntryURL) },
+   { http_link_to_id(csv_view,[uri(URI)],ViewURL) },
+   html_requires(font_awesome),
+   html([ a(href=EntryURL, [\icon(download)," Download"]), &('MediumSpace')
+        , a(href=ViewURL, [\icon(table)," View"])]).
+
+decoration:resource_decoration(URI,Link) -->
+   { sub_string(URI,_,_,0,".csv") }, !, 
+   { http_link_to_id(csv_view,[uri(URI)],ViewURL) },
+   html_requires(font_awesome),
+   html( span( [ a(href(ViewURL),\icon(table))
+               , &(nbsp), \Link
+               ])).
+
+csv_view(Request) :-
+   http_parameters(Request,
+      [  uri(URI,     [ optional(false), description("URI of CSV file")]) 
+      ,  page(Page,   [ nonneg, default(1) ]) 
+      ,  limit(Limit, [ nonneg, default(50) ])
+      ]),
+   uri_to_csv(URI,Rows),
+   length(Rows,Total),
+   Offset is Limit*(Page-1),
+   Pages is ceil(Total/Limit),
+   insist(Page=<Pages),
+   drop(Offset,Rows,Rows1),
+   insist(Page=Pages -> Rows1=Rows2; take(Limit,Rows1,Rows2)),
+   format(string(FullTitle),"CSV view for ~w",[URI]),
+   reply_html_page(cliopatria(demo), [title(FullTitle)],
+                   [ h1(FullTitle)
+                   , \paginator(csv_view-[uri(URI),limit(Limit)],Page,Pages)
+                   , \table_from_goal(csv_row(Rows2),[])
+                   , \paginator(csv_view-[uri(URI),limit(Limit)],Page,Pages)
+                   ]).
+
+csv_row(Rows,Row) :- member(R,Rows), R=..[_|Row].
+