Refactor (#7)

* refactored the source code

* modified lint settings

* added CI for build, lint and test

.eslintrc.json

@@ -0,0 +1,31 @@
+{
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "airbnb-base"
+    ],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "ecmaVersion": 12,
+        "sourceType": "module",
+        "project": "./tsconfig.json"
+    },
+    "plugins": [
+        "@typescript-eslint"
+    ],
+    "rules": {
+        "class-methods-use-this":"off",
+        "no-console":"off",
+        "import/extensions": "off",
+        "no-unused-vars": "warn"
+    },
+    "settings": {
+        "import/resolver": {
+          "node": {
+            "extensions": [".js", ".ts"]
+          }
+        }
+    }
+}

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: build
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - "src/**"
+      - "tests/**"
+
+  pull_request:
+    paths:
+      - "src/**"
+      - "tests/**"
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: 12.x
+    - run: npm ci
+    - name: build
+      run: |
+        npm run lint
+        npm run build
+    - name: test
+      run: npm run test

README.md

@@ -1,4 +1,5 @@
 # terrain-rgb
+![](https://github.com/watergis/terrain-rgb/workflows/build/badge.svg)
 ![](https://github.com/watergis/terrain-rgb/workflows/Node.js%20Package/badge.svg)
 ![GitHub](https://img.shields.io/github/license/watergis/terrain-rgb)