uci-app-vnstat2: refactoring

This is a huge change to the already existing vnstat2 LuCI module with some
improvements and some new features.

"Graphs Page":

  - Implementation of refreshing the graphs.

  - Only in the UCI configuration existing interfaces will be shown in any
    case. Before this change, all interfaces existing in the database were
    shown.

  - Introduced a button to clear the statistics for all interfaces (in fact
    this is removing and adding again the interfaces from/to the database).

    Before clearing the data a confirmation dialog is shown.

  - Show user hint if service is not running, so no updating of graphs.

  - "Error image" for a graph which can not be loaded

General:

  - Updated translations, added missing translations for ./po/de

  - Renamed the menu entry from "vnStat Traffic Monitor" to "Traffic Monitor" only

Signed-off-by: Helge Mader <ma@dev.tdt.de>

1 files changed, 93 insertions, 22 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
index 7ac3b3f7e7..7113c4119e 100644
--- 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
@@ -1,9 +1,65 @@
 // This is free software, licensed under the Apache License, Version 2.0
 
 'use strict';
+'require poll';
 'require view';
 'require fs';
 'require ui';
+'require uci';
+'require rpc';
+
+var RefreshIfaces = "";
+var RefreshTabs = ['s', 't', '5', 'h', 'd', 'm', 'y'];
+
+var callServiceList = rpc.declare({
+	object: 'service',
+	method: 'list',
+	params: [ 'name' ],
+	expect: { '': {} }
+});
+
+var isReadonlyView = !L.hasViewPermission() || null;
+
+function RefreshGraphs() {
+	RefreshTabs.forEach(function (id) {
+		RefreshIfaces.forEach(function (iface) {
+			fs.exec_direct('/usr/bin/vnstati', [ '-' + id, '-i', iface, '-o', '-' ], 'blob').then(function(res) {
+				document.getElementById('graph_' + id + '_' + iface).src = URL.createObjectURL(res);
+			});
+		});
+	});
+}
+
+function IfacesResetData(ev) {
+	ui.showModal(_('Delete data for ALL interfaces'), [
+		E('p', _('The data will be removed from the database permanently. This cannot be undone.')),
+		E('div', { 'class': 'right' }, [
+			E('div', {
+				'class': 'btn',
+				'click': L.hideModal
+			}, _('Cancel')),
+			' ',
+			E('div', {
+				'class': 'btn cbi-button-negative',
+				'click': function(ev) {
+					var if_count = 0;
+
+					RefreshIfaces.forEach(function (iface) {
+						fs.exec_direct('/usr/bin/vnstat', [ '--remove', '-i', iface, '--force' ], 'blob').then(function() {
+							fs.exec_direct('/usr/bin/vnstat', [ '--add', '-i', iface ], 'blob').then(function() {
+								if_count++;
+								if (if_count == RefreshIfaces.length) {
+									RefreshGraphs();
+								}
+							});
+						});
+					});
+					ui.hideModal();
+				}
+			}, _('Delete'))
+		])
+	]);
+}	
 
 return view.extend({
 	renderTab: function(ifaces, style, title) {
@@ -16,41 +72,41 @@ return view.extend({
 		]);
 
 		ifaces.forEach(function(iface) {
-			tab.appendChild(E('span', {}, E('img', { 'data-iface': iface, 'style': 'visibility:hidden; margin:5px 10px' })));
 			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.alt = _('Could not load graph, no data available: ') + iface;
+				img.align = 'middle';
 				img.style.visibility = 'visible';
+				img.id = 'graph_' + style + '_' + iface;
 				tab.firstElementChild.style.display = 'none';
 			});
+			tab.appendChild(E('span', {}, E('img', { 'data-iface': iface, 'style': 'visibility:hidden; margin:5px 10px' })));
 		});
 
 		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 [];
-		});
+		return Promise.all([
+			L.resolveDefault(callServiceList('vnstat'), {}),
+			uci.load('vnstat'),
+		]);
 	},
 
-	render: function(ifaces) {
+	render: function(data) {
+		var ifaces = uci.get_first('vnstat', 'vnstat', 'interface') || [];
+		var isRunning = false;
+
+		try {
+			isRunning = data[0]['vnstat']['instances']['instance1']['running'];
+		} catch (e) { }
+
 		var view = E([], [
 			E('h2', [_('vnStat Graphs')]),
+
+			(isRunning == false) ? E('p', { 'class': 'alert-message warning' }, _('Warning: The service is not running, graphs will not be updated!')):E('p'),
+
 			E('div', ifaces.length ? [
 				this.renderTab(ifaces, 's', _('Summary')),
 				this.renderTab(ifaces, 't', _('Top')),
@@ -58,13 +114,28 @@ return view.extend({
 				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.')]) ])
+				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)
+		if (ifaces.length) {
 			ui.tabs.initTabGroup(view.lastElementChild.childNodes);
 
+			view.appendChild(E('div', { 'class': 'right' }, [
+				E('br'),
+				E('button', {
+					'class': 'cbi-button cbi-button-neutral',
+					'click': IfacesResetData,
+					'disabled': isReadonlyView
+				}, [ _('Clear data for all interfaces') ])
+			]));
+		}
+
+		// Preserve the interfaces for the poll/refresh function
+		RefreshIfaces = ifaces;
+
+		poll.add(RefreshGraphs, 60);
+
 		return view;
 	},