feat(integration-templates): add discourse integration template (#2722)

## Describe your changes

- Add discourse integration template

## Issue ticket number and link

## Checklist before requesting a review (skip if just adding/editing
APIs & templates)
- [ ] I added tests, otherwise the reason is: 
- [ ] I added observability, otherwise the reason is:
- [ ] I added analytics, otherwise the reason is:

---------

Co-authored-by: Samuel Bodin <1637651+bodinsamuel@users.noreply.github.com>

docs-v2/integrations/integration-templates/discourse.mdx

@@ -0,0 +1,21 @@
+---
+title: 'Discourse API Integration Template'
+sidebarTitle: 'Discourse'
+---
+
+## Get started with the Discourse template
+
+<Card title="How to use integration templates"
+      href="/understand/concepts/templates"
+      icon="book-open">
+    Learn how to use integration templates in Nango
+</Card>
+
+<Card title="Get the Discourse template"
+      href="https://github.com/NangoHQ/nango/tree/master/integration-templates/discourse"
+      icon="github">
+    Get the latest version of the Discourse integration template from GitHub
+</Card>
+
+## Need help with the template?
+Please reach out in the [Slack community](https://nango.dev/slack), we are very active there and happy to help!

docs-v2/mint.json

@@ -267,6 +267,7 @@
                         "integrations/integration-templates/checkr-partner",
                         "integrations/integration-templates/checkr-partner-staging",
                         "integrations/integration-templates/clari-copilot",
+                        "integrations/integration-templates/discourse",
                         "integrations/integration-templates/expensify",
                         "integrations/integration-templates/exact-online",
                         "integrations/integration-templates/evaluagent",

integration-templates/discourse/helpers/paginate.ts

@@ -0,0 +1,44 @@
+import type { NangoSync, ProxyConfiguration } from '../../models';
+
+export interface PaginationParams {
+    endpoint: string;
+    initialPage?: number;
+    params?: Record<string, any>;
+}
+
+/**
+ * Asynchronous generator function for paginating through API results.
+ *
+ * This function handles pagination by making repeated requests to the specified API endpoint.
+ * It yields arrays of results for each page until no more data is available.
+ *
+ * @param nango The NangoSync instance used for making API calls.
+ * @param params Configuration parameters for pagination, including the endpoint, initial page, and additional params.
+ * @returns An async generator that yields arrays of results from each page.
+ */
+async function* paginate<T>(nango: NangoSync, { endpoint, initialPage = 1, params }: PaginationParams): AsyncGenerator<T[], void, undefined> {
+    let currentPage = initialPage;
+
+    while (true) {
+        const payload: ProxyConfiguration = {
+            endpoint,
+            params: {
+                page: currentPage,
+                ...params
+            }
+        };
+
+        const response = await nango.get<T[]>(payload);
+        const responseData = response.data;
+
+        if (!responseData || responseData.length === 0) {
+            break;
+        }
+
+        yield responseData;
+
+        currentPage++;
+    }
+}
+
+export default paginate;

integration-templates/discourse/mappers/toUser.ts

@@ -0,0 +1,17 @@
+import type { User } from '../../models';
+import type { DiscourseUser } from '../types';
+
+/**
+ * Converts a DiscourseUser object to a slim User object.
+ * Only includes essential properties mapped from DiscourseUser.
+ * @param user The DiscourseUser object to convert.
+ * @returns User object representing DiscourseUser user information.
+ */
+export function toUser(user: DiscourseUser): User {
+    return {
+        id: user.id,
+        username: user.username,
+        name: user.name,
+        admin: user.admin
+    };
+}

integration-templates/discourse/nango.yaml

@@ -0,0 +1,17 @@
+integrations:
+    discourse:
+        syncs:
+            active-users:
+                description: |
+                    Fetches a list of active users from Discourse.
+                endpoint: /discourse/active-users
+                sync_type: full
+                runs: every 1 hour
+                output: User
+                track_deletes: true
+models:
+    User:
+        id: number
+        username: string
+        name: string
+        admin: boolean

integration-templates/discourse/syncs/active-users.ts

@@ -0,0 +1,32 @@
+import type { NangoSync, User } from '../../models';
+import type { DiscourseUser } from '../types';
+import paginate from '../helpers/paginate.js';
+import type { PaginationParams } from '../helpers/paginate';
+import { toUser } from '../mappers/toUser.js';
+
+/**
+ * Fetches user data from an API and saves it in batch.
+ *
+ * This function uses the `paginate` helper to fetch active users from the specified API endpoint in a paginated manner.
+ * It maps the raw user data to a `User` format using the `toUser` mapper function and then saves the mapped data
+ * using the `nango.batchSave` method.
+ * For detailed endpoint documentation, refer to:
+ * https://docs.discourse.org/#tag/Admin/operation/adminListUsers
+ *
+ * @param nango The NangoSync instance used for making API calls and saving data.
+ * @returns A promise that resolves when the data has been successfully fetched and saved.
+ */
+export default async function fetchData(nango: NangoSync): Promise<void> {
+    const config: PaginationParams = {
+        endpoint: '/admin/users/list/active',
+        params: {
+            order: 'created',
+            asc: 'true',
+            stats: true // Additional parameters for the API request can be added in here
+        }
+    };
+
+    for await (const users of paginate<DiscourseUser>(nango, config)) {
+        await nango.batchSave<User>(users.map(toUser), 'User');
+    }
+}

integration-templates/discourse/types.ts

@@ -0,0 +1,26 @@
+export interface DiscourseUser {
+    id: number;
+    username: string;
+    name: string;
+    avatar_template: string;
+    email: string;
+    secondary_emails: (string | null)[];
+    active: boolean;
+    admin: boolean;
+    moderator: boolean;
+    last_seen_at: string;
+    last_emailed_at: string;
+    created_at: string;
+    last_seen_age: number;
+    last_emailed_age: number;
+    created_at_age: number;
+    trust_level: number;
+    manual_locked_trust_level: string;
+    title: string;
+    time_read: number;
+    staged: boolean;
+    days_visited: number;
+    posts_read_count: number;
+    topics_entered: number;
+    post_count: number;
+}

packages/shared/flows.yaml

@@ -1217,6 +1217,22 @@ integrations:
                 body:
                     storage: object
                     atlas_doc_format: object
+    discourse:
+        syncs:
+            active-users:
+                description: |
+                    Fetches a list of active users from Discourse.
+                endpoint: /discourse/active-users
+                sync_type: full
+                runs: every 1 hour
+                output: User
+                track_deletes: true
+        models:
+            User:
+                id: number
+                username: string
+                name: string
+                admin: boolean
     evaluagent:
         syncs:
             users: