Refactor client library (#4)

* Add query impls

* Add config module

* Refactor entire client library

We make several changes including:
- A separate `Connection` object
- A special `Empty` class for empty response (to differentiate from
null values)
- Only allow query objects to be sent
- Use a buffer list for all parameters

* Fix query packet generation and update README

Author: ohsayan

.gitignore

@@ -1,4 +1,5 @@
 node_modules
 .devcontainer
 dist
-.vscode
+.vscode
+.rollup_cache

README.md

@@ -1,16 +1,34 @@
-# Skytable NodeJS Driver
+# `skytable-node`: Skytable driver for NodeJS
 
-This is the skeleton template repository for Skytable's NodeJS driver. You can [track the implementation here](https://github.com/skytable/skytable/issues/324)!
+## Getting started
 
-Tasks:
-- [ ] Implement a basic Skytable client driver for NodeJS
-- [ ] Functionality:
-  - [ ] Implement the full Skyhash protocol
-  - [ ] Be able to send and receive queries and decode them ergonomically (into appropriate objects and/or types)
-  - [ ] Should have a way to use TLS
+```shell
+yarn add skytable-node
+```
 
-> For contributors: You might find the [Rust client driver](https://github.com/skytable/client-rust) to be a good reference.
-> We're here to help! Please jump into our [Discord Community](https://discord.gg/QptWFdx); we're here to mentor you.
+## Example
+
+```js
+const { Config, Query } = require('skytable-node');
+const cfg = new Config("root", "password");
+
+async function main() {
+    let db;
+    try {
+        db = await cfg.connect();
+        console.log(await db.query(new Query("sysctl report status")));
+    } catch (e) {
+        console.error(e);
+        process.exit(1);
+    } finally {
+        if (db) {
+            await db.disconnect();
+        }
+    }
+}
+
+main()
+```
 
 ## License
 

__tests__/dcl.spec.ts

@@ -0,0 +1,20 @@
+import { Config, Query } from '../src';
+
+const cfg = new Config('root', 'password');
+
+async function main() {
+  let db;
+  try {
+    db = await cfg.connect();
+    console.log(await db.query(new Query('sysctl report status')));
+  } catch (e) {
+    console.error(e);
+    process.exit(1);
+  } finally {
+    if (db) {
+      await db.disconnect();
+    }
+  }
+}
+
+main();

__tests__/ddl.spec.ts

@@ -0,0 +1,19 @@
+const { Config, Query } = require('skytable-node');
+const cfg = new Config('root', 'password');
+
+async function main() {
+  let db;
+  try {
+    db = await cfg.connect();
+    console.log(await db.query(new Query('sysctl report status')));
+  } catch (e) {
+    console.error(e);
+    process.exit(1);
+  } finally {
+    if (db) {
+      await db.disconnect();
+    }
+  }
+}
+
+main();

__tests__/dml.spec.ts

@@ -1,6 +1,6 @@
 {
   "name": "skytable-node",
-  "version": "0.1.2",
+  "version": "0.2.0",
   "main": "dist/cjs/index.js",
   "types": "dist/cjs/index.d.ts",
   "module": "dist/esm/index.mjs",