Add temporary tanstack playground

Author: stevensJourney

packages/temp-tanstackdb/package.json

@@ -0,0 +1,56 @@
+{
+  "name": "@powersync/temp-tanstackdb",
+  "private": true,
+  "version": "0.0.0",
+  "publishConfig": {
+    "registry": "https://registry.npmjs.org/",
+    "access": "public"
+  },
+  "description": "API definitions for JourneyApps PowerSync",
+  "type": "module",
+  "main": "dist/bundle.mjs",
+  "module": "dist/bundle.mjs",
+  "types": "lib/index.d.ts",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./lib/index.d.ts",
+        "default": "./dist/bundle.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "require": "./dist/bundle.cjs"
+      }
+    }
+  },
+  "author": "POWERSYNC",
+  "license": "Apache-2.0",
+  "files": [
+    "lib",
+    "dist"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/powersync-ja/powersync-js.git"
+  },
+  "bugs": {
+    "url": "https://github.com/powersync-ja/powersync-js/issues"
+  },
+  "homepage": "https://docs.powersync.com",
+  "scripts": {
+    "build": "tsc -b",
+    "build:prod": "tsc -b",
+    "clean": "rm -rf lib dist tsconfig.tsbuildinfo",
+    "test": "vitest",
+    "test:exports": "attw --pack ."
+  },
+  "dependencies": {
+    "@powersync/lite-sdk": "workspace:*",
+    "@standard-schema/spec": "^1.0.0",
+    "@tanstack/db": "0.4.20",
+    "@tanstack/store": "^0.8.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.5.9"
+  }
+}

packages/temp-tanstackdb/src/index.ts

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+import type { StandardSchemaV1 } from '@standard-schema/spec';
+import { BaseCollectionConfig, CollectionConfig, SyncConfig } from '@tanstack/db';
+
+export type BasePowerSyncCollectionConfig<
+  TTable extends Record<string, unknown>,
+  TSchema extends StandardSchemaV1 = never
+> = Omit<BaseCollectionConfig<TTable, string, TSchema>, `onInsert` | `onUpdate` | `onDelete` | `getKey`> & {};
+
+export function powerSyncCollectionOptions<
+  TTable extends Record<string, unknown>,
+  TSchema extends StandardSchemaV1<any> = never
+>(config: BasePowerSyncCollectionConfig<TTable, TSchema>) {
+  const { ...restConfig } = config;
+
+  const sync: SyncConfig<TTable, string> = {
+    sync: (params) => {
+      const { begin, write, commit, markReady } = params;
+      const abortController = new AbortController();
+
+      // The sync function needs to be synchronous
+      async function start() {}
+
+      start().catch((error) => console.error(`Could not start syncing process for TODO into TODO`, error));
+
+      return () => {
+        console.info(`Sync has been stopped for TODO into TODO`);
+        abortController.abort();
+      };
+    }
+  };
+
+  const getKey = (record: TTable) => {
+    if ('id' in record) {
+      return record.id as string;
+    }
+    throw new Error('Record has no id');
+  };
+
+  const outputConfig: CollectionConfig<TTable, string, TSchema> = {
+    ...restConfig,
+    getKey,
+    // Syncing should start immediately since we need to monitor the changes for mutations
+    startSync: true,
+    sync,
+    onInsert: async (params) => {},
+    onUpdate: async (params) => {},
+    onDelete: async (params) => {},
+    utils: {}
+  };
+  return outputConfig;
+}

packages/temp-tanstackdb/tsconfig.json

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+{
+  "extends": "../../tsconfig.base",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "jsx": "react",
+    "types": ["node"],
+    "rootDir": "src",
+    "outDir": "./lib",
+    "lib": ["esnext"],
+    "declaration": true,
+    "module": "NodeNext",
+    "moduleResolution": "nodenext",
+    "preserveConstEnums": true,
+    "esModuleInterop": false,
+    "skipLibCheck": true,
+    "strictNullChecks": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "lib"]
+}