chore: proper eslint config

eslint.config.mjs

@@ -0,0 +1,108 @@
+// @ts-check
+import eslint from "@eslint/js";
+import tsEslint from "typescript-eslint";
+import sonarjs from "eslint-plugin-sonarjs";
+import checkFile from "eslint-plugin-check-file";
+
+export default tsEslint.config({
+  plugins: {
+    "@typescript-eslint": tsEslint.plugin,
+    "check-file": checkFile,
+  },
+  ignores: ["**/*.js"],
+  extends: [eslint.configs.recommended, ...tsEslint.configs.recommended, sonarjs.configs.recommended],
+  languageOptions: {
+    parser: tsEslint.parser,
+    parserOptions: {
+      project: ["./tsconfig.json"],
+      allowDefaultProject: ["*.mjs"],
+      tsconfigRootDir: import.meta.dirname,
+    },
+  },
+  rules: {
+    "check-file/filename-naming-convention": [
+      "error",
+      {
+        "**/*.{js,ts}": "+([-._a-z0-9])",
+      },
+    ],
+    "prefer-arrow-callback": ["warn", { allowNamedFunctions: true }],
+    "func-style": ["warn", "declaration", { allowArrowFunctions: false }],
+    "@typescript-eslint/no-floating-promises": "error",
+    "@typescript-eslint/no-non-null-assertion": "error",
+    "constructor-super": "error",
+    "no-invalid-this": "off",
+    "@typescript-eslint/no-invalid-this": "error",
+    "no-restricted-syntax": ["error", "ForInStatement"],
+    "use-isnan": "error",
+    "no-unneeded-ternary": "error",
+    "no-nested-ternary": "error",
+    "@typescript-eslint/no-unused-vars": [
+      "error",
+      {
+        args: "after-used",
+        ignoreRestSiblings: true,
+        vars: "all",
+        varsIgnorePattern: "^_",
+        argsIgnorePattern: "^_",
+      },
+    ],
+    "@typescript-eslint/await-thenable": "error",
+    "@typescript-eslint/no-misused-new": "error",
+    "@typescript-eslint/restrict-plus-operands": "error",
+    "sonarjs/no-all-duplicated-branches": "error",
+    "sonarjs/no-collection-size-mischeck": "error",
+    "sonarjs/no-duplicated-branches": "error",
+    "sonarjs/no-element-overwrite": "error",
+    "sonarjs/no-identical-conditions": "error",
+    "sonarjs/no-identical-expressions": "error",
+    "@typescript-eslint/naming-convention": [
+      "error",
+      {
+        selector: "interface",
+        format: ["StrictPascalCase"],
+        custom: { regex: "^I[A-Z]", match: false },
+      },
+      {
+        selector: "memberLike",
+        modifiers: ["private"],
+        format: ["strictCamelCase"],
+        leadingUnderscore: "require",
+      },
+      {
+        selector: "typeLike",
+        format: ["StrictPascalCase"],
+      },
+      {
+        selector: "typeParameter",
+        format: ["StrictPascalCase"],
+        prefix: ["T"],
+      },
+      {
+        selector: "variable",
+        format: ["strictCamelCase", "UPPER_CASE"],
+        leadingUnderscore: "allow",
+        trailingUnderscore: "allow",
+      },
+      {
+        selector: "variable",
+        modifiers: ["destructured"],
+        format: null,
+      },
+      {
+        selector: "variable",
+        types: ["boolean"],
+        format: ["StrictPascalCase"],
+        prefix: ["is", "should", "has", "can", "did", "will", "does"],
+      },
+      {
+        selector: "variableLike",
+        format: ["strictCamelCase"],
+      },
+      {
+        selector: ["function", "variable"],
+        format: ["strictCamelCase"],
+      },
+    ],
+  },
+});