feat: Allow admin to create new text channels

toju-app/src/app/domains/server-directory/infrastructure/server-directory-api.service.ts

@@ -8,7 +8,10 @@ import {
   throwError
 } from 'rxjs';
 import { catchError, map } from 'rxjs/operators';
-import { User } from '../../../shared-kernel';
+import {
+  type Channel,
+  User
+} from '../../../shared-kernel';
 import { ServerEndpointStateService } from '../application/server-endpoint-state.service';
 import type {
   BanServerMemberRequest,
@@ -382,6 +385,7 @@ export class ServerDirectoryApiService {
       hasPassword: this.getBooleanValue(candidate['hasPassword']),
       isPrivate: this.getBooleanValue(candidate['isPrivate']),
       tags: Array.isArray(candidate['tags']) ? candidate['tags'] as string[] : [],
+      channels: this.getChannelsValue(candidate['channels']),
       createdAt: this.getNumberValue(candidate['createdAt'], Date.now()),
       sourceId: this.getStringValue(candidate['sourceId']) ?? source?.id,
       sourceName: sourceName ?? source?.name,
@@ -399,6 +403,37 @@ export class ServerDirectoryApiService {
     return typeof value === 'number' ? value : fallback;
   }
 
+  private getChannelsValue(value: unknown): Channel[] | undefined {
+    if (!Array.isArray(value)) {
+      return undefined;
+    }
+
+    return value
+      .filter((channel): channel is Record<string, unknown> => !!channel && typeof channel === 'object')
+      .map((channel, index) => {
+        const id = this.getStringValue(channel['id']);
+        const name = this.getStringValue(channel['name']);
+        const type = this.getChannelTypeValue(channel['type']);
+        const position = this.getNumberValue(channel['position'], index);
+
+        if (!id || !name || !type) {
+          return null;
+        }
+
+        return {
+          id,
+          name,
+          type,
+          position
+        } satisfies Channel;
+      })
+      .filter((channel): channel is Channel => !!channel);
+  }
+
+  private getChannelTypeValue(value: unknown): Channel['type'] | undefined {
+    return value === 'text' || value === 'voice' ? value : undefined;
+  }
+
   private getStringValue(value: unknown): string | undefined {
     return typeof value === 'string' ? value : undefined;
   }