Add service stopped state

app/classes/state/os/ServiceStoppedState.js

@@ -0,0 +1,29 @@
+const State = require('../State')
+
+class ServiceStoppedState extends State {
+    constructor(host, config) {
+        if ( !host.services ) {
+            throw new Error(`Cannot apply service stopped state to host ${host.name}: missing service manager API.`)
+        }
+        super(host, config)
+    }
+
+    async reverse() {
+        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
+        return this._host.services.start(...services)
+    }
+
+    async check() {
+        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
+        let states = await this._host.services.status(...services)
+        if ( !Array.isArray(states) ) states = [states]
+        return !states.some(x => x.status === 'running')
+    }
+
+    async apply() {
+        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
+        return this._host.services.stop(...services)
+    }
+}
+
+module.exports = exports = ServiceStoppedState