From 8ba316461d2dc0a1372af16836ce14ceabc2bf4f Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Fri, 13 Jan 2023 19:21:41 +0530
Subject: feat: adds test to stdlib + refactors runtime environment

---
 src/eval-env/node.ts | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/eval-env/node.ts

(limited to 'src/eval-env/node.ts')

diff --git a/src/eval-env/node.ts b/src/eval-env/node.ts
new file mode 100644
index 0000000..5e73987
--- /dev/null
+++ b/src/eval-env/node.ts
@@ -0,0 +1,61 @@
+import { Type } from 'ts-morph'
+import { promises as fs } from 'fs'
+import readline from 'readline'
+import { Ctx } from '../types'
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+  terminal: false,
+})
+
+const readLineFromStdin = (): Promise<string> =>
+  new Promise((res) => rl.on('line', res))
+
+export const cleanup = () => {
+  rl.close()
+}
+
+export default (ctx: Ctx, args: Type[]) => ({
+  ReadFile: async () => {
+    const [pathTyp] = args
+    const filePath = ctx.getTypeValue(pathTyp)
+    const contents = await fs.readFile(filePath, 'utf-8')
+    const [resultKey, _] = ctx.createResult(JSON.stringify(contents))
+    return [resultKey]
+  },
+
+  WriteFile: async () => {
+    const [pathTyp, contentsTyp] = args
+    const filePath = ctx.getTypeValue(pathTyp)
+    const contents = ctx.getTypeValue(contentsTyp)
+    await fs.writeFile(filePath, contents)
+    return []
+  },
+
+  GetEnv: async () => {
+    const [envTyp] = args
+    const envName = ctx.getTypeValue(envTyp)
+    const [resultKey, _] = ctx.createResult(
+      `${JSON.stringify(process.env[envName] ?? '')}`
+    )
+    return [resultKey]
+  },
+
+  GetArgs: async () => {
+    const [resultKey, _] = ctx.createResult(
+      `${JSON.stringify(process.argv.slice(2))}`
+    )
+    return [resultKey]
+  },
+
+  Exit: async () => {
+    process.exit(args[0] && ctx.getTypeValue(args[0]))
+  },
+
+  ReadLine: async () => {
+    const line = await readLineFromStdin()
+    const [resultKey, _] = ctx.createResult(`${JSON.stringify(line)}`)
+    return [resultKey]
+  },
+})
-- 
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