Add UI for multi-library management #59 (#63)

* feat: add ui for library source management

* fix: lint

server/internal/library/filesystem.ts

@@ -30,7 +30,9 @@ export class FilesystemProvider
 
     this.myId = id;
     this.config = config;
-    fs.mkdirSync(this.config.baseDir, { recursive: true });
+
+    if (!fs.existsSync(this.config.baseDir))
+      throw "Base directory does not exist.";
   }
 
   id(): string {

server/internal/library/index.ts

@@ -20,6 +20,19 @@ class LibraryManager {
     this.libraries.set(library.id(), library);
   }
 
+  removeLibrary(id: string) {
+    this.libraries.delete(id);
+  }
+
+  async fetchLibraries() {
+    const libraries = await prisma.library.findMany({});
+    const libraryWithMetadata = libraries.map((e) => ({
+      ...e,
+      working: this.libraries.has(e.id),
+    }));
+    return libraryWithMetadata;
+  }
+
   async fetchAllUnimportedGames() {
     const unimportedGames: { [key: string]: string[] } = {};