Add script editor (#393)

* Add script editor

* Cleanup

js/automation-editor/trigger/numeric_state.js

@@ -0,0 +1,51 @@
+import { h, Component } from 'preact';
+
+import { onChangeEvent } from '../../common/util/event';
+
+export default class NumericStateTrigger extends Component {
+  constructor() {
+    super();
+
+    this.onChange = onChangeEvent.bind(this, 'trigger');
+  }
+
+  /* eslint-disable camelcase */
+  render({ trigger }) {
+    const { value_template, entity_id, below, above } = trigger;
+    return (
+      <div>
+        <paper-input
+          label="Entity Id"
+          name="entity_id"
+          value={entity_id}
+          onChange={this.onChange}
+        />
+        <paper-input
+          label="Above"
+          name="above"
+          value={above}
+          onChange={this.onChange}
+        />
+        <paper-input
+          label="Below"
+          name="below"
+          value={below}
+          onChange={this.onChange}
+        />
+        <paper-textarea
+          label="Value template (optional)"
+          name="value_template"
+          value={value_template}
+          onvalue-changed={this.onChange}
+        />
+      </div>
+    );
+  }
+}
+
+NumericStateTrigger.defaultConfig = {
+  entity_id: '',
+  above: '',
+  below: '',
+  value_template: '',
+};