From 22676957c363e3fa891820254e3a4e077ebb2543 Mon Sep 17 00:00:00 2001
From: Andrew Bastin <andrewbastin.k@gmail.com>
Date: Wed, 29 Dec 2021 01:30:17 +0530
Subject: [PATCH] feat: httpsnippet based codegen implementation

---
 .../helpers/new-codegen/index.ts              | 213 ++++++++++++++++++
 1 file changed, 213 insertions(+)
 create mode 100644 packages/hoppscotch-app/helpers/new-codegen/index.ts

diff --git a/packages/hoppscotch-app/helpers/new-codegen/index.ts b/packages/hoppscotch-app/helpers/new-codegen/index.ts
new file mode 100644
index 000000000..370210885
--- /dev/null
+++ b/packages/hoppscotch-app/helpers/new-codegen/index.ts
@@ -0,0 +1,213 @@
+import HTTPSnippet from "httpsnippet"
+import { HoppRESTRequest } from "@hoppscotch/data"
+import * as O from "fp-ts/Option"
+import { pipe } from "fp-ts/function"
+import { buildHarRequest } from "./har"
+
+// Hoppscotch's Code Generation is Powered by HTTPSnippet (https://github.com/Kong/httpsnippet)
+// If you want to add support for your favorite language/library, please contribute to the HTTPSnippet repo <3
+
+/**
+ * An array defining all the code generators and their info
+ */
+export const CodegenDefinitions = [
+  {
+    name: "c-curl",
+    lang: "c",
+    mode: "libcurl",
+    caption: "C - cURL",
+  },
+  {
+    name: "clojure-clj_http",
+    lang: "clojure",
+    mode: "clj_http",
+    caption: "Clojure - clj-http",
+  },
+  {
+    name: "csharp-httpclient",
+    lang: "csharp",
+    mode: "httpclient",
+    caption: "C# - HttpClient",
+  },
+  {
+    name: "csharp-restsharp",
+    lang: "csharp",
+    mode: "restsharp",
+    caption: "C# - RestSharp",
+  },
+  {
+    name: "go-native",
+    lang: "go",
+    mode: "native",
+    caption: "Go",
+  },
+  {
+    name: "http-http1.1",
+    lang: "http",
+    mode: "http1.1",
+    caption: "HTTP - HTTP 1.1 Request String",
+  },
+  {
+    name: "java-asynchttp",
+    lang: "java",
+    mode: "asynchttp",
+    caption: "Java - AsyncHTTPClient",
+  },
+  {
+    name: "java-nethttp",
+    lang: "java",
+    mode: "nethttp",
+    caption: "Java - java.net.http",
+  },
+  {
+    name: "java-okhttp",
+    lang: "java",
+    mode: "okhttp",
+    caption: "Java - OkHttp",
+  },
+  {
+    name: "java-unirest",
+    lang: "java",
+    mode: "unirest",
+    caption: "Java - Unirest",
+  },
+  {
+    name: "javascript-axios",
+    lang: "javascript",
+    mode: "axios",
+    caption: "JavaScript - Axios",
+  },
+  {
+    name: "javascript-fetch",
+    lang: "javascript",
+    mode: "fetch",
+    caption: "JavaScript - Fetch",
+  },
+  {
+    name: "javascript-jquery",
+    lang: "javascript",
+    mode: "jquery",
+    caption: "JavaScript - jQuery",
+  },
+  {
+    name: "javascript-xhr",
+    lang: "javascript",
+    mode: "xhr",
+    caption: "JavaScript - XMLHttpRequest",
+  },
+  {
+    name: "kotlin-okhttp",
+    lang: "kotlin",
+    mode: "okhttp",
+    caption: "Kotlin - OkHttp",
+  },
+  {
+    name: "objc-nsurlsession",
+    lang: "objc",
+    mode: "nsurlsession",
+    caption: "Objective C - NSURLSession",
+  },
+  {
+    name: "ocaml-cohttp",
+    lang: "ocaml",
+    mode: "cohttp",
+    caption: "OCaml - cohttp",
+  },
+  {
+    name: "php-curl",
+    lang: "php",
+    mode: "curl",
+    caption: "PHP - cURL",
+  },
+  {
+    name: "powershell-restmethod",
+    lang: "powershell",
+    mode: "restmethod",
+    caption: "Powershell - Invoke-RestMethod",
+  },
+  {
+    name: "powershell-webrequest",
+    lang: "powershell",
+    mode: "webrequest",
+    caption: "Powershell - Invoke-WebRequest",
+  },
+  {
+    name: "python-python3",
+    lang: "python",
+    mode: "python3",
+    caption: "Python - Python 3 Native",
+  },
+  {
+    name: "python-requests",
+    lang: "python",
+    mode: "requests",
+    caption: "Python - Requests",
+  },
+  {
+    name: "r-httr",
+    lang: "r",
+    mode: "httr",
+    caption: "R - httr",
+  },
+  {
+    name: "ruby-native",
+    lang: "ruby",
+    mode: "native",
+    caption: "Ruby - Ruby Native",
+  },
+  {
+    name: "shell-curl",
+    lang: "shell",
+    mode: "curl",
+    caption: "Shell - cURL",
+  },
+  {
+    name: "shell-httpie",
+    lang: "shell",
+    mode: "httpie",
+    caption: "Shell - HTTPie",
+  },
+  {
+    name: "shell-wget",
+    lang: "shell",
+    mode: "wget",
+    caption: "Shell - Wget",
+  },
+  {
+    name: "swift-nsurlsession",
+    lang: "swift",
+    mode: "nsurlsession",
+    caption: "Swift - NSURLSession",
+  },
+] as const
+
+/**
+ * A type which defines all the valid code generators
+ */
+export type CodegenName = typeof CodegenDefinitions[number]["name"]
+
+/**
+ * Generates Source Code for the given codgen
+ * @param codegen The codegen to apply
+ * @param req The request to generate using
+ * @returns An Option with the generated code snippet
+ */
+export const generateCode = (
+  codegen: CodegenName,
+  req: HoppRESTRequest
+): O.Option<string> => {
+  // Since the Type contract guarantees a match in the array, we are enforcing non-null
+  const codegenInfo = CodegenDefinitions.find((v) => v.name === codegen)!
+
+  return pipe(
+    O.of(
+      // Returns a string if valid, false if not
+      new HTTPSnippet({
+        ...buildHarRequest(req),
+      }).convert(codegenInfo.lang, codegenInfo.mode)
+    ),
+
+    // Only allow string output to pass through, else none
+    O.chain(O.fromPredicate((val): val is string => typeof val === "string"))
+  )
+}