Post to Slack (#603)

* Migrations

* WIP: Integration model, slack perms / hooks

* So so rough it pains me. Building this new model is revealing just how much needs to be refactored

* Working connect and post

* Cleanup UI, upating documents

* Show when slack command is connected

* stash

* 💚

* Add documents.update trigger

* Authorization, tidying

* Fixed integration policy

* pick integration presenter keys

app/models/Integration.js

@@ -0,0 +1,57 @@
+// @flow
+import { extendObservable, action } from 'mobx';
+
+import BaseModel from 'models/BaseModel';
+import { client } from 'utils/ApiClient';
+import stores from 'stores';
+import ErrorsStore from 'stores/ErrorsStore';
+
+type Settings = {
+  url: string,
+  channel: string,
+  channelId: string,
+};
+
+type Events = 'documents.create' | 'collections.create';
+
+class Integration extends BaseModel {
+  errors: ErrorsStore;
+
+  id: string;
+  serviceId: string;
+  collectionId: string;
+  events: Events;
+  settings: Settings;
+
+  @action
+  update = async (data: Object) => {
+    try {
+      await client.post('/integrations.update', { id: this.id, ...data });
+      extendObservable(this, data);
+    } catch (e) {
+      this.errors.add('Integration failed to update');
+    }
+    return false;
+  };
+
+  @action
+  delete = async () => {
+    try {
+      await client.post('/integrations.delete', { id: this.id });
+      this.emit('integrations.delete', { id: this.id });
+      return true;
+    } catch (e) {
+      this.errors.add('Integration failed to delete');
+    }
+    return false;
+  };
+
+  constructor(data?: Object = {}) {
+    super();
+
+    extendObservable(this, data);
+    this.errors = stores.errors;
+  }
+}
+
+export default Integration;