Added eslint and prettier

.eslintrc.cjs

@@ -0,0 +1,48 @@
+module.exports = {
+  globals: {
+    module: "readonly",
+  },
+  env: {
+    node: true,
+  },
+  parser: "@typescript-eslint/parser",
+  extends: [
+    // By extending from a plugin config, we can get recommended rules
+    // without having to add them manually.
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    // This disables the formatting rules in ESLint that Prettier is going to be responsible for handling.
+    // Make sure it's always the last config, so it gets the chance to override other configs.
+    "eslint-config-prettier",
+  ],
+  plugins: ["prettier"],
+  settings: {
+    // Tells eslint how to resolve imports.
+    "import/resolver": {
+      node: {
+        paths: ["src"],
+        extensions: [".js", ".jsx", ".ts", ".tsx"],
+      },
+    },
+  },
+  rules: {
+    "no-console": "off", // Allow console logging in backend code.
+    "prettier/prettier": "error",
+    "no-unused-vars": ["warn", { argsIgnorePattern: "^_" }], // Ignore unused function arguments starting with _
+    "no-use-before-define": [
+      "error",
+      { functions: false, classes: true, variables: true },
+    ], // Allow variable hoisting for easier-to-read code.
+    "prefer-const": "error", // Encourage use of const where possible.
+    "@typescript-eslint/ban-types": [
+      "error",
+      {
+        types: {
+          Function: false, // Allow use of the 'Function' type.
+        },
+        extendDefaults: true,
+      },
+    ],
+  },
+  ignorePatterns: ["node_modules/", "package-lock.json", "build/", "coverage/"],
+};

.gitignore

@@ -4,3 +4,4 @@ package-lock.json
 tsconfig.tsbuildinfo
 build
 releases
+coverage

.prettierignore

@@ -0,0 +1,4 @@
+node_modules
+build
+package-lock.json
+coverage

.prettierrc.cjs

@@ -0,0 +1,10 @@
+module.exports = {
+  trailingComma: "all",
+  tabWidth: 2,
+  semi: true,
+  singleQuote: true,
+  printWidth: 100,
+  bracketSpacing: true,
+  endOfLine: "lf",
+  arrowParens: "always",
+};

package.json

@@ -32,7 +32,13 @@
     "@rollup/plugin-node-resolve": "15.2.3",
     "@rollup/plugin-typescript": "11.1.6",
     "@types/node": "20.11.10",
+    "@typescript-eslint/eslint-plugin": "7.7.0",
+    "@typescript-eslint/parser": "7.7.0",
+    "eslint": "8.57.0",
+    "eslint-config-prettier": "9.1.0",
+    "eslint-plugin-prettier": "5.1.3",
     "husky": "9.0.11",
+    "prettier": "3.2.5",
     "rollup-plugin-dts": "6.1.0",
     "tslib": "2.6.2",
     "typescript": "5.3.3"

tsconfig.json

@@ -1,16 +1,23 @@
 {
   "compilerOptions": {
-    "target": "ESnext",
-    "module": "ESNext",
+    "target": "ESNext",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
     "outDir": "./build",
-    "rootDir": "./src",
+    "rootDir": ".",
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    },
     "strict": true,
     "declaration": true,
     "esModuleInterop": true,
     "skipLibCheck": true,
+    "exactOptionalPropertyTypes": true,
     "removeComments": true,
-    "sourceMap": true
+    "sourceMap": true,
+    "resolveJsonModule": true
   },
-  "include": ["src/**/*.ts"],
-  "exclude": ["node_modules"]
+  "include": ["src/**/*.ts", "__tests__"],
+  "exclude": ["node_modules", "build", "coverage"]
 }