refactor(server): system config (#9517)

server/src/repositories/system-metadata.repository.ts

@@ -1,5 +1,6 @@
 import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
+import { readFile } from 'node:fs/promises';
 import { SystemMetadata, SystemMetadataEntity } from 'src/entities/system-metadata.entity';
 import { ISystemMetadataRepository } from 'src/interfaces/system-metadata.interface';
 import { Instrumentation } from 'src/utils/instrumentation';
@@ -24,4 +25,22 @@ export class SystemMetadataRepository implements ISystemMetadataRepository {
   async set<T extends keyof SystemMetadata>(key: T, value: SystemMetadata[T]): Promise<void> {
     await this.repository.upsert({ key, value }, { conflictPaths: { key: true } });
   }
+
+  async fetchStyle(url: string) {
+    try {
+      const response = await fetch(url);
+
+      if (!response.ok) {
+        throw new Error(`Failed to fetch data from ${url} with status ${response.status}: ${await response.text()}`);
+      }
+
+      return response.json();
+    } catch (error) {
+      throw new Error(`Failed to fetch data from ${url}: ${error}`);
+    }
+  }
+
+  readFile(filename: string): Promise<string> {
+    return readFile(filename, { encoding: 'utf8' });
+  }
 }