Database-level multi-library support #48 (#58)

* feat: start of library backends

* feat: update backend routes and create initializer

* feat: add legacy library creation

* fix: resolve frontend type errors

* fix: runtime errors

* fix: lint

server/plugins/05.library-init.ts

@@ -0,0 +1,74 @@
+import { LibraryBackend } from "~/prisma/client";
+import prisma from "../internal/db/database";
+import type { JsonValue } from "@prisma/client/runtime/library";
+import type { LibraryProvider } from "../internal/library/provider";
+import type { FilesystemProviderConfig } from "../internal/library/filesystem";
+import { FilesystemProvider } from "../internal/library/filesystem";
+import libraryManager from "../internal/library";
+import path from "path";
+
+const libraryConstructors: {
+  [key in LibraryBackend]: (
+    value: JsonValue,
+    id: string,
+  ) => LibraryProvider<unknown>;
+} = {
+  Filesystem: function (
+    value: JsonValue,
+    id: string,
+  ): LibraryProvider<unknown> {
+    return new FilesystemProvider(value, id);
+  },
+};
+
+export default defineNitroPlugin(async () => {
+  let successes = 0;
+  const libraries = await prisma.library.findMany({});
+
+  // Add migration handler
+  const legacyPath = process.env.LIBRARY;
+  if (legacyPath && libraries.length == 0) {
+    const options: typeof FilesystemProviderConfig.infer = {
+      baseDir: path.resolve(legacyPath),
+    };
+
+    const library = await prisma.library.create({
+      data: {
+        name: "Auto-created",
+        backend: LibraryBackend.Filesystem,
+        options,
+      },
+    });
+
+    libraries.push(library);
+
+    // Update all existing games
+    await prisma.game.updateMany({
+      where: {
+        libraryId: null,
+      },
+      data: {
+        libraryId: library.id,
+      },
+    });
+  }
+
+  for (const library of libraries) {
+    const constructor = libraryConstructors[library.backend];
+    try {
+      const provider = constructor(library.options, library.id);
+      libraryManager.addLibrary(provider);
+      successes++;
+    } catch (e) {
+      console.warn(
+        `Failed to create library (${library.id}) of type ${library.backend}:\n ${e}`,
+      );
+    }
+  }
+
+  if (successes == 0) {
+    console.warn(
+      "No library was successfully initialised. Please check for errors. If you have just set up an instance, this is normal.",
+    );
+  }
+});