chore: Configureer linter (ESLint)

backend/eslint.config.ts

@@ -0,0 +1,11 @@
+import globals from 'globals';
+import rootConfig from '../eslint.config';
+
+export default [
+    ...rootConfig,
+    {
+        languageOptions: {
+            globals: globals.node,
+        },
+    },
+];

eslint.config.ts

@@ -0,0 +1,82 @@
+import pluginJs from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import prettierConfig from 'eslint-config-prettier';
+
+import { includeIgnoreFile } from '@eslint/compat';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const gitignorePath = path.resolve(__dirname, '.gitignore');
+
+export default [
+    pluginJs.configs.recommended,
+    ...tseslint.configs.recommended,
+    prettierConfig,
+    includeIgnoreFile(gitignorePath),
+    {
+        ignores: ['**/dist/**', '**/.node_modules/**', '**/coverage/**'],
+    },
+    {
+        languageOptions: {
+            ecmaVersion: 'latest',
+            sourceType: 'module',
+        },
+        linterOptions: {
+            reportUnusedInlineConfigs: 'error',
+        },
+        rules: {
+            'no-await-in-loop': 'warn',
+            'no-constructor-return': 'error',
+            'no-duplicate-imports': 'error',
+            'no-inner-declarations': 'error',
+            'no-self-compare': 'error',
+            'no-template-curly-in-string': 'error',
+            'no-unmodified-loop-condition': 'warn',
+            'no-unreachable-loop': 'warn',
+            'no-use-before-define': 'error',
+            'no-useless-assignment': 'error',
+
+            'arrow-body-style': ['warn', 'always'],
+            'block-scoped-var': 'warn',
+            camelcase: 'warn',
+            'capitalized-comments': 'warn',
+            'consistent-return': 'warn',
+            'consistent-this': 'error',
+            curly: 'error',
+            'default-case': 'error',
+            'default-case-last': 'error',
+            'default-param-last': 'error',
+            'dot-notation': 'warn',
+            eqeqeq: 'error',
+            'func-names': 'warn',
+            'func-style': ['warn', 'declaration'],
+            'grouped-accessor-pairs': ['warn', 'getBeforeSet'],
+            'guard-for-in': 'warn',
+            'logical-assignment-operators': 'warn',
+            'max-classes-per-file': 'warn',
+            'no-alert': 'error',
+            'no-array-constructor': 'warn',
+            'no-bitwise': 'warn',
+            'no-console': 'warn',
+            'no-continue': 'warn',
+            'no-else-return': 'warn',
+            'no-empty-function': 'warn',
+            'no-eq-null': 'error',
+            'no-eval': 'error',
+            'no-extend-native': 'error',
+            'no-extra-label': 'error',
+            'no-implicit-coercion': 'warn',
+            'no-implied-eval': 'error',
+            'no-invalid-this': 'error',
+            'no-iterator': 'error',
+            'no-label-var': 'warn',
+            'no-labels': 'warn',
+            'no-loop-func': 'error',
+            'no-multi-assign': 'error',
+            'no-nested-ternary': 'error',
+            'no-object-constructor': 'error',
+        },
+    },
+];

frontend/eslint.config.ts

@@ -1,15 +1,19 @@
-import pluginVue from 'eslint-plugin-vue'
-import { defineConfigWithVueTs, vueTsConfigs } from '@vue/eslint-config-typescript'
-import pluginVitest from '@vitest/eslint-plugin'
-import pluginPlaywright from 'eslint-plugin-playwright'
-import skipFormatting from '@vue/eslint-config-prettier/skip-formatting'
+import pluginVue from 'eslint-plugin-vue';
+import {
+    defineConfigWithVueTs,
+    vueTsConfigs,
+} from '@vue/eslint-config-typescript';
+import pluginVitest from '@vitest/eslint-plugin';
+import pluginPlaywright from 'eslint-plugin-playwright';
+import skipFormatting from '@vue/eslint-config-prettier/skip-formatting';
+import rootConfig from '../eslint.config';
 
 // To allow more languages other than `ts` in `.vue` files, uncomment the following lines:
-// import { configureVueProject } from '@vue/eslint-config-typescript'
-// configureVueProject({ scriptLangs: ['ts', 'tsx'] })
+// Import { configureVueProject } from '@vue/eslint-config-typescript'
+// ConfigureVueProject({ scriptLangs: ['ts', 'tsx'] })
 // More info at https://github.com/vuejs/eslint-config-typescript/#advanced-setup
 
-export default defineConfigWithVueTs(
+const vueConfig = defineConfigWithVueTs(
     {
         name: 'app/files-to-lint',
         files: ['**/*.{ts,mts,tsx,vue}'],
@@ -32,5 +36,10 @@ export default defineConfigWithVueTs(
         ...pluginPlaywright.configs['flat/recommended'],
         files: ['e2e/**/*.{test,spec}.{js,ts,jsx,tsx}'],
     },
-  skipFormatting,
-)
+    skipFormatting
+);
+
+export default [
+    ...rootConfig,
+    ...vueConfig
+]