feat: add eslint

.github/dependabot.yml

@@ -0,0 +1,16 @@
+# Dependabot should update GitHub Action dependencies.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    commit-message:
+      prefix: "chore(ci): "
+    groups:
+      github-actions:
+        patterns:
+          - "*"

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run test
+        run: npm run test

.npmignore

@@ -1 +1,3 @@
-test-flows/
+.github/
+test-flows/
+eslint.config.mjs

eslint.config.mjs

@@ -0,0 +1,34 @@
+import globals from 'globals';
+import pluginJs from '@eslint/js';
+import json from 'eslint-plugin-json';
+
+/**
+ * @type {import('eslint').Linter.FlatConfig[]}
+ */
+const config = [
+    {files: ['**/*.js'], languageOptions: {sourceType: 'commonjs'}},
+    {languageOptions: {globals: globals.node}},
+    pluginJs.configs.recommended,
+    {
+        files: ['**/*.json'],
+        ...json.configs['recommended']
+    },
+    {
+        rules: {
+            // Use modern ES2015+
+            // TODO
+            // 'no-var': 'warn',
+            // 'prefer-const': 'warn',
+        },
+    },
+    {
+        rules: {
+            // TODO
+            'no-redeclare': 'off',
+            'no-prototype-builtins': 'off',
+            semi: 'off',
+        },
+    },
+];
+
+export default config;

influxdb.js

@@ -97,7 +97,7 @@ module.exports = function (RED) {
         } else if (typeof value === 'number') {
             point.floatField(name, value);
         } else if (typeof value === 'string') {
-            // string values with numbers ending with 'i' are considered integers            
+            // string values with numbers ending with 'i' are considered integers
             if (isIntegerString(value)) {
                 value = parseInt(value.substring(0,value.length-1));
                 point.intField(name, value);
@@ -209,7 +209,6 @@ module.exports = function (RED) {
             var client = this.influxdbConfig.client;
 
             node.on("input", function (msg, send, done) {
-                var measurement;
                 var writeOptions = {};
 
                 var measurement = msg.hasOwnProperty('measurement') ? msg.measurement : node.measurement;
@@ -436,6 +435,7 @@ module.exports = function (RED) {
                 var query;
                 var rawOutput;
                 var queryOptions = {};
+                var queryPromise;
                 var precision;
                 var retentionPolicy;
 
@@ -457,9 +457,9 @@ module.exports = function (RED) {
                 }
 
                 if (rawOutput) {
-                    var queryPromise = client.queryRaw(query, queryOptions);
+                    queryPromise = client.queryRaw(query, queryOptions);
                 } else {
-                    var queryPromise = client.query(query, queryOptions);
+                    queryPromise = client.query(query, queryOptions);
                 }
 
                 queryPromise.then(function (results) {