refactor: Redesign list channels for the slack actions

packages/backend/src/apps/slack/data/list-channels/index.ts

@@ -0,0 +1,36 @@
+import { IGlobalVariable, IJSONObject } from '@automatisch/types';
+
+export default {
+  name: 'List channels',
+  key: 'listChannels',
+
+  async run($: IGlobalVariable) {
+    const channels: {
+      data: IJSONObject[];
+      error: IJSONObject | null;
+    } = {
+      data: [],
+      error: null,
+    };
+
+    const response = await $.http.get('/conversations.list', {
+      headers: {
+        Authorization: `Bearer ${$.auth.data.accessToken}`,
+      },
+    });
+
+    if (response.integrationError || response.data.ok === 'false') {
+      channels.error = response.integrationError;
+      return channels;
+    }
+
+    channels.data = response.data.channels.map((channel: IJSONObject) => {
+      return {
+        value: channel.id,
+        name: channel.name,
+      };
+    });
+
+    return channels;
+  },
+};