luci-app-vnstat2: fully convert to client side rendering

This converts the graph rendering to client side JavaScript and replaces
the route registration with declarative JSON.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 73 insertions, 0 deletions

diff --git a/applications/luci-app-vnstat2/htdocs/luci-static/resources/view/vnstat2/graphs.js b/applications/luci-app-vnstat2/htdocs/luci-static/resources/view/vnstat2/graphs.js
new file mode 100644
index 0000000000..770884655a
--- /dev/null
+++ b/applications/luci-app-vnstat2/htdocs/luci-static/resources/view/vnstat2/graphs.js
@@ -0,0 +1,73 @@
+// This is free software, licensed under the Apache License, Version 2.0
+
+'use strict';
+'require fs';
+'require ui';
+
+return L.view.extend({
+	renderTab: function(ifaces, style, title) {
+		var tab = E('div', {
+			'class': 'cbi-section',
+			'data-tab': style,
+			'data-tab-title': title
+		}, [
+			E('p', {}, E('em', { 'class': 'spinning' }, [ _('Loading graphs…') ]))
+		]);
+
+		ifaces.forEach(function(iface) {
+			tab.appendChild(E('p', {}, E('img', { 'data-iface': iface, 'style': 'display:none' })));
+			fs.exec_direct('/usr/bin/vnstati', [ '-'+style, '-i', iface, '-o', '-' ], 'blob').then(function(res) {
+				var img = tab.querySelector('img[data-iface="%s"]'.format(iface));
+				img.src = URL.createObjectURL(res);
+				img.style.display = '';
+				tab.firstElementChild.style.display = 'none';
+			});
+		});
+
+		return tab;
+	},
+
+	load: function() {
+		return fs.exec_direct('/usr/bin/vnstat', [ '--json', 'f', '1' ], 'text').then(function(res) {
+			var json = null;
+
+			try {
+				json = JSON.parse(res)
+			}
+			catch(e) {
+				throw new Error(res.replace(/^Error: /, ''));
+			}
+
+			return (L.isObject(json) ? L.toArray(json.interfaces) : []).map(function(iface) {
+				return iface.name;
+			}).sort();
+		}).catch(function(err) {
+			ui.addNotification(null, E('p', { 'style': 'white-space:pre' }, [err]));
+			return [];
+		});
+	},
+
+	render: function(ifaces) {
+		var view = E([], [
+			E('h2', [_('vnStat Graphs')]),
+			E('div', ifaces.length ? [
+				this.renderTab(ifaces, 's', _('Summary')),
+				this.renderTab(ifaces, 't', _('Top')),
+				this.renderTab(ifaces, '5', _('5 Minute')),
+				this.renderTab(ifaces, 'h', _('Hourly')),
+				this.renderTab(ifaces, 'd', _('Daily')),
+				this.renderTab(ifaces, 'm', _('Monthly')),
+				this.renderTab(ifaces, 'y', _('Yearly'))
+			] : [ E('em', [_('No monitored interfaces have been found. Go to the configuration to enable monitoring for one or more interfaces.')]) ])
+		]);
+
+		if (ifaces.length)
+			ui.tabs.initTabGroup(view.lastElementChild.childNodes);
+
+		return view;
+	},
+
+	handleSave: null,
+	handleSaveApply: null,
+	handleReset: null
+});