luci-mod-system: reimplent system/crontab as client side view

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

modules/luci-base/root/usr/share/rpcd/acl.d/luci-base.json

@@ -23,6 +23,7 @@
 			"file": {
 				"/": [ "list" ],
 				"/*": [ "list" ],
+				"/etc/crontabs/root": [ "read" ],
 				"/etc/rc.local": [ "read" ],
 				"/proc/sys/kernel/hostname": [ "read" ]
 			},
@@ -40,6 +41,7 @@
 		"write": {
 			"cgi-io": [ "upload", "/etc/luci-uploads/*" ],
 			"file": {
+				"/etc/crontabs/root": [ "write" ],
 				"/etc/luci-uploads/*": [ "write" ],
 				"/etc/rc.local": [ "write" ]
 			},

modules/luci-mod-system/htdocs/luci-static/resources/view/system/crontab.js

@@ -0,0 +1,52 @@
+'use strict';
+'require rpc';
+
+return L.view.extend({
+	callFileRead: rpc.declare({
+		object: 'file',
+		method: 'read',
+		params: [ 'path' ],
+		expect: { data: '' }
+	}),
+
+	callFileWrite: rpc.declare({
+		object: 'file',
+		method: 'write',
+		params: [ 'path', 'data' ]
+	}),
+
+	load: function() {
+		return this.callFileRead('/etc/crontabs/root');
+	},
+
+	handleSave: function(ev) {
+		var value = (document.querySelector('textarea').value || '').trim().replace(/\r\n/g, '\n') + '\n';
+
+		return this.callFileWrite('/etc/crontabs/root', value).then(function(rc) {
+			if (rc != 0)
+				throw rpc.getStatusText(rc);
+
+			document.querySelector('textarea').value = value;
+			L.ui.addNotification(null, E('p', _('Contents have been saved.')), 'info');
+
+		}).catch(function(e) {
+			L.ui.addNotification(null, E('p', _('Unable to save contents: %s').format(e)));
+		});
+	},
+
+	render: function(crontab) {
+		return E([
+			E('h2', _('Scheduled Tasks')),
+			E('p', {},
+				_('This is the system crontab in which scheduled tasks can be defined.') +
+				_('<br/>Note: you need to manually restart the cron service if the crontab file was empty before editing.')),
+			E('p', {}, E('textarea', { 'style': 'width:100%', 'rows': 10 }, crontab != null ? crontab : '')),
+			E('div', { 'class': 'right' }, [
+				E('button', {
+					'class': 'btn cbi-button-positive important',
+					'click': L.ui.createHandlerFn(this, 'handleSave')
+				}, _('Save'))
+			])
+		]);
+	}
+});

modules/luci-mod-system/luasrc/controller/admin/system.lua

@@ -22,7 +22,7 @@ function index()
 	end
 
 	entry({"admin", "system", "startup"}, view("system/startup"), _("Startup"), 45)
-	entry({"admin", "system", "crontab"}, form("admin_system/crontab"), _("Scheduled Tasks"), 46)
+	entry({"admin", "system", "crontab"}, view("system/crontab"), _("Scheduled Tasks"), 46)
 
 	if fs.access("/sbin/block") and fs.access("/etc/config/fstab") then
 		entry({"admin", "system", "fstab"}, cbi("admin_system/fstab"), _("Mount Points"), 50)

modules/luci-mod-system/luasrc/model/cbi/admin_system/crontab.lua

@@ -1,33 +0,0 @@
--- Copyright 2008 Steven Barth <steven@midlink.org>
--- Copyright 2008-2013 Jo-Philipp Wich <jow@openwrt.org>
--- Licensed to the public under the Apache License 2.0.
-
-local fs = require "nixio.fs"
-local cronfile = "/etc/crontabs/root" 
-
-f = SimpleForm("crontab", translate("Scheduled Tasks"),
-	translate("This is the system crontab in which scheduled tasks can be defined.") ..
-	translate("<br/>Note: you need to manually restart the cron service if the " ..
-		"crontab file was empty before editing."))
-
-t = f:field(TextValue, "crons")
-f.forcewrite = true
-t.rmempty = true
-t.rows = 10
-function t.cfgvalue()
-	return fs.readfile(cronfile) or ""
-end
-
-function f.handle(self, state, data)
-	if state == FORM_VALID then
-		if data.crons then
-			fs.writefile(cronfile, data.crons:gsub("\r\n", "\n"))
-			luci.sys.call("/usr/bin/crontab %q" % cronfile)
-		else
-			fs.writefile(cronfile, "")
-		end
-	end
-	return true
-end
-
-return f