From f35391b9b20ca91e595500aed1cd66dc2881014a Mon Sep 17 00:00:00 2001
From: Filip Gralinski <filipg@amu.edu.pl>
Date: Mon, 16 Sep 2019 20:32:43 +0200
Subject: [PATCH] Add dumping CSV/Excel

---
 static/css/buttons.dataTables.min.css      |  1 +
 static/js/buttons.html5.min.js             | 35 +++++++++++++++++
 static/js/dataTables.buttons.min.js        | 45 ++++++++++++++++++++++
 templates/challenge-all-submissions.julius |  8 +++-
 templates/default-layout-wrapper.hamlet    |  5 +++
 templates/show-challenge.julius            |  8 +++-
 6 files changed, 100 insertions(+), 2 deletions(-)
 create mode 100644 static/css/buttons.dataTables.min.css
 create mode 100644 static/js/buttons.html5.min.js
 create mode 100644 static/js/dataTables.buttons.min.js

diff --git a/static/css/buttons.dataTables.min.css b/static/css/buttons.dataTables.min.css
new file mode 100644
index 0000000..e734c06
--- /dev/null
+++ b/static/css/buttons.dataTables.min.css
@@ -0,0 +1 @@
+@keyframes dtb-spinner{100%{transform:rotate(360deg)}}@-o-keyframes dtb-spinner{100%{-o-transform:rotate(360deg);transform:rotate(360deg)}}@-ms-keyframes dtb-spinner{100%{-ms-transform:rotate(360deg);transform:rotate(360deg)}}@-webkit-keyframes dtb-spinner{100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@-moz-keyframes dtb-spinner{100%{-moz-transform:rotate(360deg);transform:rotate(360deg)}}div.dt-button-info{position:fixed;top:50%;left:50%;width:400px;margin-top:-100px;margin-left:-200px;background-color:white;border:2px solid #111;box-shadow:3px 3px 8px rgba(0,0,0,0.3);border-radius:3px;text-align:center;z-index:21}div.dt-button-info h2{padding:0.5em;margin:0;font-weight:normal;border-bottom:1px solid #ddd;background-color:#f3f3f3}div.dt-button-info>div{padding:1em}div.dt-button-collection-title{text-align:center;padding:0.3em 0 0.5em;font-size:0.9em}div.dt-button-collection-title:empty{display:none}button.dt-button,div.dt-button,a.dt-button{position:relative;display:inline-block;box-sizing:border-box;margin-right:0.333em;margin-bottom:0.333em;padding:0.5em 1em;border:1px solid #999;border-radius:2px;cursor:pointer;font-size:0.88em;line-height:1.6em;color:black;white-space:nowrap;overflow:hidden;background-color:#e9e9e9;background-image:-webkit-linear-gradient(top, #fff 0%, #e9e9e9 100%);background-image:-moz-linear-gradient(top, #fff 0%, #e9e9e9 100%);background-image:-ms-linear-gradient(top, #fff 0%, #e9e9e9 100%);background-image:-o-linear-gradient(top, #fff 0%, #e9e9e9 100%);background-image:linear-gradient(to bottom, #fff 0%, #e9e9e9 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='white', EndColorStr='#e9e9e9');-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;text-decoration:none;outline:none}button.dt-button.disabled,div.dt-button.disabled,a.dt-button.disabled{color:#999;border:1px solid #d0d0d0;cursor:default;background-color:#f9f9f9;background-image:-webkit-linear-gradient(top, #fff 0%, #f9f9f9 100%);background-image:-moz-linear-gradient(top, #fff 0%, #f9f9f9 100%);background-image:-ms-linear-gradient(top, #fff 0%, #f9f9f9 100%);background-image:-o-linear-gradient(top, #fff 0%, #f9f9f9 100%);background-image:linear-gradient(to bottom, #fff 0%, #f9f9f9 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#ffffff', EndColorStr='#f9f9f9')}button.dt-button:active:not(.disabled),button.dt-button.active:not(.disabled),div.dt-button:active:not(.disabled),div.dt-button.active:not(.disabled),a.dt-button:active:not(.disabled),a.dt-button.active:not(.disabled){background-color:#e2e2e2;background-image:-webkit-linear-gradient(top, #f3f3f3 0%, #e2e2e2 100%);background-image:-moz-linear-gradient(top, #f3f3f3 0%, #e2e2e2 100%);background-image:-ms-linear-gradient(top, #f3f3f3 0%, #e2e2e2 100%);background-image:-o-linear-gradient(top, #f3f3f3 0%, #e2e2e2 100%);background-image:linear-gradient(to bottom, #f3f3f3 0%, #e2e2e2 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#f3f3f3', EndColorStr='#e2e2e2');box-shadow:inset 1px 1px 3px #999999}button.dt-button:active:not(.disabled):hover:not(.disabled),button.dt-button.active:not(.disabled):hover:not(.disabled),div.dt-button:active:not(.disabled):hover:not(.disabled),div.dt-button.active:not(.disabled):hover:not(.disabled),a.dt-button:active:not(.disabled):hover:not(.disabled),a.dt-button.active:not(.disabled):hover:not(.disabled){box-shadow:inset 1px 1px 3px #999999;background-color:#cccccc;background-image:-webkit-linear-gradient(top, #eaeaea 0%, #ccc 100%);background-image:-moz-linear-gradient(top, #eaeaea 0%, #ccc 100%);background-image:-ms-linear-gradient(top, #eaeaea 0%, #ccc 100%);background-image:-o-linear-gradient(top, #eaeaea 0%, #ccc 100%);background-image:linear-gradient(to bottom, #eaeaea 0%, #ccc 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#eaeaea', 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100%);background-image:-moz-linear-gradient(top, #bddef4 0%, #79ace9 100%);background-image:-ms-linear-gradient(top, #bddef4 0%, #79ace9 100%);background-image:-o-linear-gradient(top, #bddef4 0%, #79ace9 100%);background-image:linear-gradient(to bottom, #bddef4 0%, #79ace9 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#bddef4', EndColorStr='#79ace9')}.dt-button embed{outline:none}div.dt-buttons{position:relative;float:left}div.dt-buttons.buttons-right{float:right}div.dt-button-collection{position:absolute;top:0;left:0;width:150px;margin-top:3px;padding:8px 8px 4px 8px;border:1px solid #ccc;border:1px solid rgba(0,0,0,0.4);background-color:white;overflow:hidden;z-index:2002;border-radius:5px;box-shadow:3px 3px 5px rgba(0,0,0,0.3);-webkit-column-gap:8px;-moz-column-gap:8px;-ms-column-gap:8px;-o-column-gap:8px;column-gap:8px}div.dt-button-collection button.dt-button,div.dt-button-collection div.dt-button,div.dt-button-collection a.dt-button{position:relative;left:0;right:0;width:100%;display:block;float:none;margin-bottom:4px;margin-right:0}div.dt-button-collection button.dt-button:active:not(.disabled),div.dt-button-collection button.dt-button.active:not(.disabled),div.dt-button-collection div.dt-button:active:not(.disabled),div.dt-button-collection div.dt-button.active:not(.disabled),div.dt-button-collection a.dt-button:active:not(.disabled),div.dt-button-collection a.dt-button.active:not(.disabled){background-color:#dadada;background-image:-webkit-linear-gradient(top, #f0f0f0 0%, #dadada 100%);background-image:-moz-linear-gradient(top, #f0f0f0 0%, #dadada 100%);background-image:-ms-linear-gradient(top, #f0f0f0 0%, #dadada 100%);background-image:-o-linear-gradient(top, #f0f0f0 0%, #dadada 100%);background-image:linear-gradient(to bottom, #f0f0f0 0%, #dadada 100%);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#f0f0f0', EndColorStr='#dadada');box-shadow:inset 1px 1px 3px #666}div.dt-button-collection.fixed{position:fixed;top:50%;left:50%;margin-left:-75px;border-radius:0}div.dt-button-collection.fixed.two-column{margin-left:-150px}div.dt-button-collection.fixed.three-column{margin-left:-225px}div.dt-button-collection.fixed.four-column{margin-left:-300px}div.dt-button-collection>*{-webkit-column-break-inside:avoid;break-inside:avoid}div.dt-button-collection.two-column{width:300px;padding-bottom:1px;-webkit-column-count:2;-moz-column-count:2;-ms-column-count:2;-o-column-count:2;column-count:2}div.dt-button-collection.three-column{width:450px;padding-bottom:1px;-webkit-column-count:3;-moz-column-count:3;-ms-column-count:3;-o-column-count:3;column-count:3}div.dt-button-collection.four-column{width:600px;padding-bottom:1px;-webkit-column-count:4;-moz-column-count:4;-ms-column-count:4;-o-column-count:4;column-count:4}div.dt-button-collection .dt-button{border-radius:0}div.dt-button-background{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);background:-ms-radial-gradient(center, ellipse farthest-corner, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);background:-moz-radial-gradient(center, ellipse farthest-corner, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);background:-o-radial-gradient(center, ellipse farthest-corner, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);background:-webkit-gradient(radial, center center, 0, center center, 497, color-stop(0, rgba(0,0,0,0.3)), color-stop(1, rgba(0,0,0,0.7)));background:-webkit-radial-gradient(center, ellipse farthest-corner, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);background:radial-gradient(ellipse farthest-corner at center, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);z-index:2001}@media screen and (max-width: 640px){div.dt-buttons{float:none 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diff --git a/static/js/buttons.html5.min.js b/static/js/buttons.html5.min.js
new file mode 100644
index 0000000..deee7fe
--- /dev/null
+++ b/static/js/buttons.html5.min.js
@@ -0,0 +1,35 @@
+/*!
+ HTML5 export buttons for Buttons and DataTables.
+ 2016 SpryMedia Ltd - datatables.net/license
+
+ FileSaver.js (1.3.3) - MIT license
+ Copyright © 2016 Eli Grey - http://eligrey.com
+*/
+(function(f){"function"===typeof define&&define.amd?define(["jquery","datatables.net","datatables.net-buttons"],function(g){return f(g,window,document)}):"object"===typeof exports?module.exports=function(g,p,z,t){g||(g=window);p&&p.fn.dataTable||(p=require("datatables.net")(g,p).$);p.fn.dataTable.Buttons||require("datatables.net-buttons")(g,p);return f(p,g,g.document,z,t)}:f(jQuery,window,document)})(function(f,g,p,z,t,w){function A(a){for(var b="";0<=a;)b=String.fromCharCode(a%26+65)+b,a=Math.floor(a/
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+k.value=h[e].value,d.setAttributeNode(k)}c=C.serializeToString(c);y&&(-1===c.indexOf("<?xml")&&(c='<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'+c),c=c.replace(/_dt_b_namespace_token_/g,":"),c=c.replace(/xmlns:NS[\d]+="" NS[\d]+:/g,""));c=c.replace(/<([^<>]*?) xmlns=""([^<>]*?)>/g,"<$1 $2>");a.file(b,c)}})}function r(a,b,d){var c=a.createElement(b);d&&(d.attr&&f(c).attr(d.attr),d.children&&f.each(d.children,function(a,b){c.appendChild(b)}),null!==d.text&&d.text!==w&&c.appendChild(a.createTextNode(d.text)));
+return c}function L(a,b){var d=a.header[b].length;a.footer&&a.footer[b].length>d&&(d=a.footer[b].length);for(var c=0,f=a.body.length;c<f;c++){var e=a.body[c][b];e=null!==e&&e!==w?e.toString():"";-1!==e.indexOf("\n")?(e=e.split("\n"),e.sort(function(a,c){return c.length-a.length}),e=e[0].length):e=e.length;e>d&&(d=e);if(40<d)return 54}d*=1.35;return 6<d?d:6}var v=f.fn.dataTable;v.Buttons.pdfMake=function(a){if(!a)return t||g.pdfMake;t=m_ake};v.Buttons.jszip=function(a){if(!a)return z||g.JSZip;z=a};
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diff --git a/static/js/dataTables.buttons.min.js b/static/js/dataTables.buttons.min.js
new file mode 100644
index 0000000..5b37c7f
--- /dev/null
+++ b/static/js/dataTables.buttons.min.js
@@ -0,0 +1,45 @@
+/*!
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+ ©2016-2019 SpryMedia Ltd - datatables.net/license
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+b;return this},active:function(a,b){var c=this._nodeToButton(a);a=this.c.dom.button.active;c=d(c.node);if(b===l)return c.hasClass(a);c.toggleClass(a,b===l?!0:b);return this},add:function(a,b){var c=this.s.buttons;if("string"===typeof b){b=b.split("-");c=this.s;for(var d=0,f=b.length-1;d<f;d++)c=c.buttons[1*b[d]];c=c.buttons;b=1*b[b.length-1]}this._expandButton(c,a,!1,b);this._draw();return this},container:function(){return this.dom.container},disable:function(a){a=this._nodeToButton(a);d(a.node).addClass(this.c.dom.button.disabled);
+return this},destroy:function(){d("body").off("keyup."+this.s.namespace);var a=this.s.buttons.slice(),b;var c=0;for(b=a.length;c<b;c++)this.remove(a[c].node);this.dom.container.remove();a=this.s.dt.settings()[0];c=0;for(b=a.length;c<b;c++)if(a.inst===this){a.splice(c,1);break}return this},enable:function(a,b){if(!1===b)return this.disable(a);a=this._nodeToButton(a);d(a.node).removeClass(this.c.dom.button.disabled);return this},name:function(){return this.c.name},node:function(a){if(!a)return this.dom.container;
+a=this._nodeToButton(a);return d(a.node)},processing:function(a,b){a=this._nodeToButton(a);if(b===l)return d(a.node).hasClass("processing");d(a.node).toggleClass("processing",b);return this},remove:function(a){var b=this._nodeToButton(a),c=this._nodeToHost(a),e=this.s.dt;if(b.buttons.length)for(var f=b.buttons.length-1;0<=f;f--)this.remove(b.buttons[f].node);b.conf.destroy&&b.conf.destroy.call(e.button(a),e,d(a),b.conf);this._removeKey(b.conf);d(b.node).remove();a=d.inArray(b,c);c.splice(a,1);return this},
+text:function(a,b){var c=this._nodeToButton(a);a=this.c.dom.collection.buttonLiner;a=c.inCollection&&a&&a.tag?a.tag:this.c.dom.buttonLiner.tag;var e=this.s.dt,f=d(c.node),g=function(a){return"function"===typeof a?a(e,f,c.conf):a};if(b===l)return g(c.conf.text);c.conf.text=b;a?f.children(a).html(g(b)):f.html(g(b));return this},_constructor:function(){var a=this,b=this.s.dt,c=b.settings()[0],e=this.c.buttons;c._buttons||(c._buttons=[]);c._buttons.push({inst:this,name:this.c.name});for(var f=0,g=e.length;f<
+g;f++)this.add(e[f]);b.on("destroy",function(b,d){d===c&&a.destroy()});d("body").on("keyup."+this.s.namespace,function(b){if(!n.activeElement||n.activeElement===n.body){var c=String.fromCharCode(b.keyCode).toLowerCase();-1!==a.s.listenKeys.toLowerCase().indexOf(c)&&a._keypress(c,b)}})},_addKey:function(a){a.key&&(this.s.listenKeys+=d.isPlainObject(a.key)?a.key.key:a.key)},_draw:function(a,b){a||(a=this.dom.container,b=this.s.buttons);a.children().detach();for(var c=0,d=b.length;c<d;c++)a.append(b[c].inserter),
+a.append(" "),b[c].buttons&&b[c].buttons.length&&this._draw(b[c].collection,b[c].buttons)},_expandButton:function(a,b,c,e){var f=this.s.dt,g=0;b=d.isArray(b)?b:[b];for(var h=0,k=b.length;h<k;h++){var v=this._resolveExtends(b[h]);if(v)if(d.isArray(v))this._expandButton(a,v,c,e);else{var m=this._buildButton(v,c);if(m){e!==l?(a.splice(e,0,m),e++):a.push(m);if(m.conf.buttons){var y=this.c.dom.collection;m.collection=d("<"+y.tag+"/>").addClass(y.className).attr("role","menu");m.conf._collection=m.collection;
+this._expandButton(m.buttons,m.conf.buttons,!0,e)}v.init&&v.init.call(f.button(m.node),f,d(m.node),v);g++}}}},_buildButton:function(a,b){var c=this.c.dom.button,e=this.c.dom.buttonLiner,f=this.c.dom.collection,g=this.s.dt,h=function(b){return"function"===typeof b?b(g,m,a):b};b&&f.button&&(c=f.button);b&&f.buttonLiner&&(e=f.buttonLiner);if(a.available&&!a.available(g,a))return!1;var k=function(a,b,c,e){e.action.call(b.button(c),a,b,c,e);d(b.table().node()).triggerHandler("buttons-action.dt",[b.button(c),
+b,c,e])};f=a.tag||c.tag;var v=a.clickBlurs===l?!0:a.clickBlurs,m=d("<"+f+"/>").addClass(c.className).attr("tabindex",this.s.dt.settings()[0].iTabIndex).attr("aria-controls",this.s.dt.table().node().id).on("click.dtb",function(b){b.preventDefault();!m.hasClass(c.disabled)&&a.action&&k(b,g,m,a);v&&m.blur()}).on("keyup.dtb",function(b){13===b.keyCode&&!m.hasClass(c.disabled)&&a.action&&k(b,g,m,a)});"a"===f.toLowerCase()&&m.attr("href","#");"button"===f.toLowerCase()&&m.attr("type","button");e.tag?(f=
+d("<"+e.tag+"/>").html(h(a.text)).addClass(e.className),"a"===e.tag.toLowerCase()&&f.attr("href","#"),m.append(f)):m.html(h(a.text));!1===a.enabled&&m.addClass(c.disabled);a.className&&m.addClass(a.className);a.titleAttr&&m.attr("title",h(a.titleAttr));a.attr&&m.attr(a.attr);a.namespace||(a.namespace=".dt-button-"+C++);e=(e=this.c.dom.buttonContainer)&&e.tag?d("<"+e.tag+"/>").addClass(e.className).append(m):m;this._addKey(a);this.c.buttonCreated&&(e=this.c.buttonCreated(a,e));return{conf:a,node:m.get(0),
+inserter:e,buttons:[],inCollection:b,collection:null}},_nodeToButton:function(a,b){b||(b=this.s.buttons);for(var c=0,d=b.length;c<d;c++){if(b[c].node===a)return b[c];if(b[c].buttons.length){var f=this._nodeToButton(a,b[c].buttons);if(f)return f}}},_nodeToHost:function(a,b){b||(b=this.s.buttons);for(var c=0,d=b.length;c<d;c++){if(b[c].node===a)return b;if(b[c].buttons.length){var f=this._nodeToHost(a,b[c].buttons);if(f)return f}}},_keypress:function(a,b){if(!b._buttonsHandled){var c=function(e){for(var f=
+0,g=e.length;f<g;f++){var h=e[f].conf,k=e[f].node;h.key&&(h.key===a?(b._buttonsHandled=!0,d(k).click()):!d.isPlainObject(h.key)||h.key.key!==a||h.key.shiftKey&&!b.shiftKey||h.key.altKey&&!b.altKey||h.key.ctrlKey&&!b.ctrlKey||h.key.metaKey&&!b.metaKey||(b._buttonsHandled=!0,d(k).click()));e[f].buttons.length&&c(e[f].buttons)}};c(this.s.buttons)}},_removeKey:function(a){if(a.key){var b=d.isPlainObject(a.key)?a.key.key:a.key;a=this.s.listenKeys.split("");b=d.inArray(b,a);a.splice(b,1);this.s.listenKeys=
+a.join("")}},_resolveExtends:function(a){var b=this.s.dt,c,e=function(c){for(var e=0;!d.isPlainObject(c)&&!d.isArray(c);){if(c===l)return;if("function"===typeof c){if(c=c(b,a),!c)return!1}else if("string"===typeof c){if(!r[c])throw"Unknown button type: "+c;c=r[c]}e++;if(30<e)throw"Buttons: Too many iterations";}return d.isArray(c)?c:d.extend({},c)};for(a=e(a);a&&a.extend;){if(!r[a.extend])throw"Cannot extend unknown button type: "+a.extend;var f=e(r[a.extend]);if(d.isArray(f))return f;if(!f)return!1;
+var g=f.className;a=d.extend({},f,a);g&&a.className!==g&&(a.className=g+" "+a.className);var h=a.postfixButtons;if(h){a.buttons||(a.buttons=[]);g=0;for(c=h.length;g<c;g++)a.buttons.push(h[g]);a.postfixButtons=null}if(h=a.prefixButtons){a.buttons||(a.buttons=[]);g=0;for(c=h.length;g<c;g++)a.buttons.splice(g,0,h[g]);a.prefixButtons=null}a.extend=f.extend}return a}});t.background=function(a,b,c,e){c===l&&(c=400);e||(e=n.body);a?d("<div/>").addClass(b).css("display","none").insertAfter(e).stop().fadeIn(c):
+d("div."+b).stop().fadeOut(c,function(){d(this).removeClass(b).remove()})};t.instanceSelector=function(a,b){if(!a)return d.map(b,function(a){return a.inst});var c=[],e=d.map(b,function(a){return a.name}),f=function(a){if(d.isArray(a))for(var g=0,k=a.length;g<k;g++)f(a[g]);else"string"===typeof a?-1!==a.indexOf(",")?f(a.split(",")):(a=d.inArray(d.trim(a),e),-1!==a&&c.push(b[a].inst)):"number"===typeof a&&c.push(b[a].inst)};f(a);return c};t.buttonSelector=function(a,b){for(var c=[],e=function(a,b,c){for(var d,
+f,g=0,k=b.length;g<k;g++)if(d=b[g])f=c!==l?c+g:g+"",a.push({node:d.node,name:d.conf.name,idx:f}),d.buttons&&e(a,d.buttons,f+"-")},f=function(a,b){var g,h=[];e(h,b.s.buttons);var k=d.map(h,function(a){return a.node});if(d.isArray(a)||a instanceof d)for(k=0,g=a.length;k<g;k++)f(a[k],b);else if(null===a||a===l||"*"===a)for(k=0,g=h.length;k<g;k++)c.push({inst:b,node:h[k].node});else if("number"===typeof a)c.push({inst:b,node:b.s.buttons[a].node});else if("string"===typeof a)if(-1!==a.indexOf(","))for(h=
+a.split(","),k=0,g=h.length;k<g;k++)f(d.trim(h[k]),b);else if(a.match(/^\d+(\-\d+)*$/))k=d.map(h,function(a){return a.idx}),c.push({inst:b,node:h[d.inArray(a,k)].node});else if(-1!==a.indexOf(":name"))for(a=a.replace(":name",""),k=0,g=h.length;k<g;k++)h[k].name===a&&c.push({inst:b,node:h[k].node});else d(k).filter(a).each(function(){c.push({inst:b,node:this})});else"object"===typeof a&&a.nodeName&&(h=d.inArray(a,k),-1!==h&&c.push({inst:b,node:k[h]}))},g=0,h=a.length;g<h;g++)f(b,a[g]);return c};t.defaults=
+{buttons:["copy","excel","csv","pdf","print"],name:"main",tabIndex:0,dom:{container:{tag:"div",className:"dt-buttons"},collection:{tag:"div",className:"dt-button-collection"},button:{tag:"ActiveXObject"in q?"a":"button",className:"dt-button",active:"active",disabled:"disabled"},buttonLiner:{tag:"span",className:""}}};t.version="1.5.6";d.extend(r,{collection:{text:function(a){return a.i18n("buttons.collection","Collection")},className:"buttons-collection",init:function(a,b,c){b.attr("aria-expanded",
+!1)},action:function(a,b,c,e){var f=function(){b.buttons('[aria-haspopup="true"][aria-expanded="true"]').nodes().each(function(){var a=d(this).siblings(".dt-button-collection");a.length&&a.stop().fadeOut(e.fade,function(){a.detach()});d(this).attr("aria-expanded","false")});d("div.dt-button-background").off("click.dtb-collection");t.background(!1,e.backgroundClassName,e.fade,l);d("body").off(".dtb-collection");b.off("buttons-action.b-internal")};a="true"===c.attr("aria-expanded");f();if(!a){var g=
+d(c).parents("div.dt-button-collection");a=c.position();var h=d(b.table().container()),k=!1,l=c;c.attr("aria-expanded","true");g.length&&(k=d(".dt-button-collection").position(),l=g,d("body").trigger("click.dtb-collection"));l.parents("body")[0]!==n.body&&(l=n.body.lastChild);e._collection.find(".dt-button-collection-title").remove();e._collection.prepend('<div class="dt-button-collection-title">'+e.collectionTitle+"</div>");e._collection.addClass(e.collectionLayout).css("display","none").insertAfter(l).stop().fadeIn(e.fade);
+g=e._collection.css("position");if(k&&"absolute"===g)e._collection.css({top:k.top,left:k.left});else if("absolute"===g){e._collection.css({top:a.top+c.outerHeight(),left:a.left});k=h.offset().top+h.height();k=a.top+c.outerHeight()+e._collection.outerHeight()-k;g=a.top-e._collection.outerHeight();var m=h.offset().top;(k>m-g||e.dropup)&&e._collection.css("top",a.top-e._collection.outerHeight()-5);e._collection.hasClass(e.rightAlignClassName)&&e._collection.css("left",a.left+c.outerWidth()-e._collection.outerWidth());
+k=a.left+e._collection.outerWidth();h=h.offset().left+h.width();k>h&&e._collection.css("left",a.left-(k-h));c=c.offset().left+e._collection.outerWidth();c>d(q).width()&&e._collection.css("left",a.left-(c-d(q).width()))}else c=e._collection.height()/2,c>d(q).height()/2&&(c=d(q).height()/2),e._collection.css("marginTop",-1*c);e.background&&t.background(!0,e.backgroundClassName,e.fade,l);setTimeout(function(){d("div.dt-button-background").on("click.dtb-collection",function(){});d("body").on("click.dtb-collection",
+function(a){var b=d.fn.addBack?"addBack":"andSelf";d(a.target).parents()[b]().filter(e._collection).length||f()}).on("keyup.dtb-collection",function(a){27===a.keyCode&&f()});if(e.autoClose)b.on("buttons-action.b-internal",function(){f()})},10)}},background:!0,collectionLayout:"",collectionTitle:"",backgroundClassName:"dt-button-background",rightAlignClassName:"dt-button-right",autoClose:!1,fade:400,attr:{"aria-haspopup":!0}},copy:function(a,b){if(r.copyHtml5)return"copyHtml5";if(r.copyFlash&&r.copyFlash.available(a,
+b))return"copyFlash"},csv:function(a,b){if(r.csvHtml5&&r.csvHtml5.available(a,b))return"csvHtml5";if(r.csvFlash&&r.csvFlash.available(a,b))return"csvFlash"},excel:function(a,b){if(r.excelHtml5&&r.excelHtml5.available(a,b))return"excelHtml5";if(r.excelFlash&&r.excelFlash.available(a,b))return"excelFlash"},pdf:function(a,b){if(r.pdfHtml5&&r.pdfHtml5.available(a,b))return"pdfHtml5";if(r.pdfFlash&&r.pdfFlash.available(a,b))return"pdfFlash"},pageLength:function(a){a=a.settings()[0].aLengthMenu;var b=d.isArray(a[0])?
+a[0]:a,c=d.isArray(a[0])?a[1]:a;return{extend:"collection",text:function(a){return a.i18n("buttons.pageLength",{"-1":"Show all rows",_:"Show %d rows"},a.page.len())},className:"buttons-page-length",autoClose:!0,buttons:d.map(b,function(a,b){return{text:c[b],className:"button-page-length",action:function(b,c){c.page.len(a).draw()},init:function(b,c,d){var e=this;c=function(){e.active(b.page.len()===a)};b.on("length.dt"+d.namespace,c);c()},destroy:function(a,b,c){a.off("length.dt"+c.namespace)}}}),
+init:function(a,b,c){var d=this;a.on("length.dt"+c.namespace,function(){d.text(c.text)})},destroy:function(a,b,c){a.off("length.dt"+c.namespace)}}}});p.Api.register("buttons()",function(a,b){b===l&&(b=a,a=l);this.selector.buttonGroup=a;var c=this.iterator(!0,"table",function(c){if(c._buttons)return t.buttonSelector(t.instanceSelector(a,c._buttons),b)},!0);c._groupSelector=a;return c});p.Api.register("button()",function(a,b){a=this.buttons(a,b);1<a.length&&a.splice(1,a.length);return a});p.Api.registerPlural("buttons().active()",
+"button().active()",function(a){return a===l?this.map(function(a){return a.inst.active(a.node)}):this.each(function(b){b.inst.active(b.node,a)})});p.Api.registerPlural("buttons().action()","button().action()",function(a){return a===l?this.map(function(a){return a.inst.action(a.node)}):this.each(function(b){b.inst.action(b.node,a)})});p.Api.register(["buttons().enable()","button().enable()"],function(a){return this.each(function(b){b.inst.enable(b.node,a)})});p.Api.register(["buttons().disable()",
+"button().disable()"],function(){return this.each(function(a){a.inst.disable(a.node)})});p.Api.registerPlural("buttons().nodes()","button().node()",function(){var a=d();d(this.each(function(b){a=a.add(b.inst.node(b.node))}));return a});p.Api.registerPlural("buttons().processing()","button().processing()",function(a){return a===l?this.map(function(a){return a.inst.processing(a.node)}):this.each(function(b){b.inst.processing(b.node,a)})});p.Api.registerPlural("buttons().text()","button().text()",function(a){return a===
+l?this.map(function(a){return a.inst.text(a.node)}):this.each(function(b){b.inst.text(b.node,a)})});p.Api.registerPlural("buttons().trigger()","button().trigger()",function(){return this.each(function(a){a.inst.node(a.node).trigger("click")})});p.Api.registerPlural("buttons().containers()","buttons().container()",function(){var a=d(),b=this._groupSelector;this.iterator(!0,"table",function(c){if(c._buttons){c=t.instanceSelector(b,c._buttons);for(var d=0,f=c.length;d<f;d++)a=a.add(c[d].container())}});
+return a});p.Api.register("button().add()",function(a,b){var c=this.context;c.length&&(c=t.instanceSelector(this._groupSelector,c[0]._buttons),c.length&&c[0].add(b,a));return this.button(this._groupSelector,a)});p.Api.register("buttons().destroy()",function(){this.pluck("inst").unique().each(function(a){a.destroy()});return this});p.Api.registerPlural("buttons().remove()","buttons().remove()",function(){this.each(function(a){a.inst.remove(a.node)});return this});var w;p.Api.register("buttons.info()",
+function(a,b,c){var e=this;if(!1===a)return d("#datatables_buttons_info").fadeOut(function(){d(this).remove()}),clearTimeout(w),w=null,this;w&&clearTimeout(w);d("#datatables_buttons_info").length&&d("#datatables_buttons_info").remove();a=a?"<h2>"+a+"</h2>":"";d('<div id="datatables_buttons_info" class="dt-button-info"/>').html(a).append(d("<div/>")["string"===typeof b?"html":"append"](b)).css("display","none").appendTo("body").fadeIn();c!==l&&0!==c&&(w=setTimeout(function(){e.buttons.info(!1)},c));
+return this});p.Api.register("buttons.exportData()",function(a){if(this.context.length)return D(new p.Api(this.context[0]),a)});p.Api.register("buttons.exportInfo()",function(a){a||(a={});var b=a;var c="*"===b.filename&&"*"!==b.title&&b.title!==l&&null!==b.title&&""!==b.title?b.title:b.filename;"function"===typeof c&&(c=c());c===l||null===c?c=null:(-1!==c.indexOf("*")&&(c=d.trim(c.replace("*",d("head > title").text()))),c=c.replace(/[^a-zA-Z0-9_\u00A1-\uFFFF\.,\-_ !\(\)]/g,""),(b=x(b.extension))||
+(b=""),c+=b);b=x(a.title);b=null===b?null:-1!==b.indexOf("*")?b.replace("*",d("head > title").text()||"Exported data"):b;return{filename:c,title:b,messageTop:z(this,a.message||a.messageTop,"top"),messageBottom:z(this,a.messageBottom,"bottom")}});var x=function(a){return null===a||a===l?null:"function"===typeof a?a():a},z=function(a,b,c){b=x(b);if(null===b)return null;a=d("caption",a.table().container()).eq(0);return"*"===b?a.css("caption-side")!==c?null:a.length?a.text():"":b},A=d("<textarea/>")[0],
+D=function(a,b){var c=d.extend(!0,{},{rows:null,columns:"",modifier:{search:"applied",order:"applied"},orthogonal:"display",stripHtml:!0,stripNewlines:!0,decodeEntities:!0,trim:!0,format:{header:function(a){return e(a)},footer:function(a){return e(a)},body:function(a){return e(a)}},customizeData:null},b),e=function(a){if("string"!==typeof a)return a;a=a.replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,"");a=a.replace(/<!\-\-.*?\-\->/g,"");c.stripHtml&&(a=a.replace(/<[^>]*>/g,""));c.trim&&
+(a=a.replace(/^\s+|\s+$/g,""));c.stripNewlines&&(a=a.replace(/\n/g," "));c.decodeEntities&&(A.innerHTML=a,a=A.value);return a};b=a.columns(c.columns).indexes().map(function(b){var d=a.column(b).header();return c.format.header(d.innerHTML,b,d)}).toArray();var f=a.table().footer()?a.columns(c.columns).indexes().map(function(b){var d=a.column(b).footer();return c.format.footer(d?d.innerHTML:"",b,d)}).toArray():null,g=d.extend({},c.modifier);a.select&&"function"===typeof a.select.info&&g.selected===l&&
+a.rows(c.rows,d.extend({selected:!0},g)).any()&&d.extend(g,{selected:!0});g=a.rows(c.rows,g).indexes().toArray();var h=a.cells(g,c.columns);g=h.render(c.orthogonal).toArray();h=h.nodes().toArray();for(var k=b.length,p=[],m=0,n=0,q=0<k?g.length/k:0;n<q;n++){for(var t=[k],r=0;r<k;r++)t[r]=c.format.body(g[m],n,r,h[m]),m++;p[n]=t}b={header:b,footer:f,body:p};c.customizeData&&c.customizeData(b);return b};d.fn.dataTable.Buttons=t;d.fn.DataTable.Buttons=t;d(n).on("init.dt plugin-init.dt",function(a,b){"dt"===
+a.namespace&&(a=b.oInit.buttons||p.defaults.buttons)&&!b._buttons&&(new t(b,a)).container()});p.ext.feature.push({fnInit:u,cFeature:"B"});p.ext.features&&p.ext.features.register("buttons",u);return t});
diff --git a/templates/challenge-all-submissions.julius b/templates/challenge-all-submissions.julius
index 7cb0414..58e7cfc 100644
--- a/templates/challenge-all-submissions.julius
+++ b/templates/challenge-all-submissions.julius
@@ -11,6 +11,12 @@
      $("table").DataTable({
        'pageLength': 50,
        'order': [[2, 'desc'], [#{delta} + columnDefs.length-1, 'desc']],
-       'columnDefs': columnDefs
+       'columnDefs': columnDefs,
+       'dom': 'Bfrtlip',
+       'buttons': [
+            'copy',
+            'csv',
+            'excel'
+        ]
        });
   } );
diff --git a/templates/default-layout-wrapper.hamlet b/templates/default-layout-wrapper.hamlet
index 5807645..f1a65bd 100644
--- a/templates/default-layout-wrapper.hamlet
+++ b/templates/default-layout-wrapper.hamlet
@@ -16,8 +16,13 @@ $newline never
     <link rel="stylesheet" type="text/css" href="/static/css/datatables.min.css"/>
     <link rel="stylesheet" type="text/css" href="/static/css/c3.min.css"/>
     <link rel="stylesheet" type="text/css" href="/static/css/extra.css"/>
+    <link rel="stylesheet" type="text/css" href="/static/css/buttons.dataTables.min.css"/>
+
     <script type="text/javascript" src="/static/js/datatables.min.js">
     <script type="text/javascript" src="/static/js/datatables-extended.js">
+    <script type="text/javascript" src="/static/js/dataTables.buttons.min.js">
+    <script type="text/javascript" src="/static/js/buttons.html5.min.js">
+    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.3/jszip.min.js">
 
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"
           integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
diff --git a/templates/show-challenge.julius b/templates/show-challenge.julius
index 0541f97..55a6bf7 100644
--- a/templates/show-challenge.julius
+++ b/templates/show-challenge.julius
@@ -10,6 +10,12 @@
   $(document).ready(function() {
      $("table").DataTable({
        'pageLength': 50,
-       'columnDefs': columnDefs
+       'columnDefs': columnDefs,
+       'dom': 'Bfrtlip',
+       'buttons': [
+            'copy',
+            'csv',
+            'excel'
+        ]
        })
   });