Add ability to link Slack <-> Outline accounts (#6682)

plugins/slack/shared/SlackUtils.ts

@@ -1,18 +1,36 @@
 import env from "@shared/env";
+import { IntegrationType } from "@shared/types";
 import { integrationSettingsPath } from "@shared/utils/routeHelpers";
 
 export class SlackUtils {
   private static authBaseUrl = "https://slack.com/oauth/authorize";
 
-  static commandsUrl(
-    { baseUrl, params }: { baseUrl: string; params?: string } = {
-      baseUrl: `${env.URL}`,
-      params: undefined,
-    }
+  /**
+   * Create a state string for use in OAuth flows
+   *
+   * @param teamId The team ID
+   * @param type The integration type
+   * @param data Additional data to include in the state
+   * @returns A state string
+   */
+  static createState(
+    teamId: string,
+    type: IntegrationType,
+    data?: Record<string, any>
   ) {
-    return params
-      ? `${baseUrl}/auth/slack.commands?${params}`
-      : `${baseUrl}/auth/slack.commands`;
+    return JSON.stringify({ type, teamId, ...data });
+  }
+
+  /**
+   * Parse a state string from an OAuth flow
+   *
+   * @param state The state string
+   * @returns The parsed state
+   */
+  static parseState<T>(
+    state: string
+  ): { teamId: string; type: IntegrationType } & T {
+    return JSON.parse(state);
   }
 
   static callbackUrl(
@@ -26,7 +44,7 @@ export class SlackUtils {
       : `${baseUrl}/auth/slack.callback`;
   }
 
-  static postUrl(
+  static connectUrl(
     { baseUrl, params }: { baseUrl: string; params?: string } = {
       baseUrl: `${env.URL}`,
       params: undefined,