chore(frontend): configure linting for typescript

Author: c0rydoras

frontend/.eslintrc.js

@@ -1,17 +1,107 @@
 "use-strict";
 
 module.exports = {
-  extends: ["@adfinis/eslint-config/ember-app"],
+  root: true,
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    ecmaVersion: "latest",
+  },
+  plugins: ["ember", "@typescript-eslint", "import"],
+  extends: [
+    "eslint:recommended",
+    "plugin:ember/recommended",
+    "plugin:prettier/recommended",
+  ],
+  env: {
+    browser: true,
+  },
   rules: {
-    "ember/no-actions-hash": "warn",
-    "ember/no-component-lifecycle-hooks": "warn",
-    "ember/no-mixins": "warn",
-    "ember/no-new-mixins": "warn",
-    "ember/no-classic-classes": "warn",
-    "ember/no-classic-components": "warn",
-    "ember/no-get": "warn",
-    "ember/no-observers": "warn",
-    "qunit/no-assert-equal": "warn",
-    "ember/require-tagless-components": "warn",
+    // possible errors
+    "no-await-in-loop": "error",
+
+    // best practices
+    "array-callback-return": "error",
+    "dot-notation": "error",
+    eqeqeq: "error",
+    "no-alert": "error",
+    "no-else-return": "error",
+    "no-eval": "error",
+    "no-extend-native": "error",
+    "no-extra-bind": "error",
+    "no-floating-decimal": "error",
+    "one-var": ["error", "never"],
+    curly: ["error", "multi-line"],
+
+    // ES6
+    "no-var": "error",
+    "object-shorthand": "error",
+    "prefer-const": "error",
+    "prefer-destructuring": [
+      "error",
+      { AssignmentExpression: { array: false, object: false } },
+    ],
+    "prefer-rest-params": "error",
+    "prefer-spread": "error",
+    "prefer-template": "error",
+
+    // import
+    "import/no-duplicates": "error",
+    "import/no-unresolved": "off",
+    "import/order": [
+      "error",
+      {
+        "newlines-between": "always",
+        alphabetize: { order: "asc", caseInsensitive: true },
+      },
+    ],
+
+    // tooling
+    "no-console": ["error", { allow: ["warn", "error"] }],
+    "no-debugger": "error",
   },
+  overrides: [
+    // js files
+    {
+      files: ["**/*.js"],
+      extends: [
+        "plugin:@typescript-eslint/eslint-recommended",
+        "plugin:@typescript-eslint/recommended",
+      ],
+      rules: {},
+    },
+    // ts files
+    {
+      files: ["**/*.ts"],
+      extends: [
+        "plugin:@typescript-eslint/eslint-recommended",
+        "plugin:@typescript-eslint/recommended",
+      ],
+      rules: {},
+    },
+    // node files
+    {
+      files: [
+        "./.eslintrc.js",
+        "./.prettierrc.js",
+        "./.stylelintrc.js",
+        "./.template-lintrc.js",
+        "./ember-cli-build.js",
+        "./testem.js",
+        "./blueprints/*/index.js",
+        "./config/**/*.js",
+        "./lib/*/index.js",
+        "./server/**/*.js",
+      ],
+      env: {
+        browser: false,
+        node: true,
+      },
+      extends: ["plugin:n/recommended"],
+    },
+    {
+      // test files
+      files: ["tests/**/*-test.{js,ts}"],
+      extends: ["plugin:qunit/recommended"],
+    },
+  ],
 };