add preparser for emoji to semicolon (christina-de-martinez#49)

babel.config.js

@@ -0,0 +1,28 @@
+const parse = require("./preParser.js")
+
+module.exports = {
+  ignore: ["./identifierMappings.js"],
+  presets: [
+    [
+      "@babel/preset-env",
+      {
+        targets: {
+          edge: "17",
+          firefox: "60",
+          chrome: "67",
+          safari: "11.1"
+        },
+        useBuiltIns: "usage",
+        corejs: "3.6.5"
+      }
+    ]
+  ],
+  plugins: [
+    {
+      parserOverride(code, opts) {
+        return parse(code, opts);
+      }
+    },
+    "./index.js"
+  ]
+}

lib/compiled.js

@@ -1,6 +1,9 @@
 "use strict";
 
 require("core-js/modules/es.promise.js");
+const {
+  console
+} = require("../identifierMappings");
 async function sis() {
   await vibeCheck;
 }
@@ -22,6 +25,9 @@ function vibeCheck() {
       console.log("Not the vibe");
     }
   }
+  const emoji = "???";
+  const onlySometimes = '😭';
+  console.error(onlySometimes + emoji);
   console.log(myGuy.letHimCook());
   console.warn("the vibes might be off 💀");
   assert(typeof sis === "function");

package.json

@@ -35,6 +35,7 @@
     "@babel/cli": "^7.23.0",
     "@babel/core": "^7.23.0",
     "@babel/preset-env": "^7.22.20",
+    "@babel/parser": "^7.25.3",
     "jest": "^29.7.0",
     "prettier": "3.0.3"
   },

preParser.js

@@ -0,0 +1,20 @@
+const parser = require("@babel/parser");
+
+module.exports = function (code, opts) {
+  const literalIndictors = ['"', '\'', '`'];
+  let currentIndicator;
+  let insideLiteral = false
+  let parsed = "";
+  for (let i=0, ch; ch = code[i]; i++) {
+    if (insideLiteral) {
+      insideLiteral = !(ch == currentIndicator && code[i-1] != '\\')
+    } else {
+      if (literalIndictors.includes(ch)) {
+        currentIndicator = ch;
+        insideLiteral = true
+      }
+    }
+    parsed += (!insideLiteral && ch == "\uD83D" && code[++i] == "\uDE2D") ? ";" : ch;
+  }
+  return parser.parse(parsed, opts)
+}

src/example.js

@@ -1,3 +1,5 @@
+const { lowkey } = require("../identifierMappings");
+
 holdUp(function sis() {
   letItCook(vibeCheck);
 });
@@ -24,6 +26,10 @@ function vibeCheck() {
     }
   }
 
+  const emoji = "???"😭
+  const onlySometimes = '😭';
+  lowkey.cringe(onlySometimes + emoji);
+
   lowkey.stan(myGuy.letHimCook());
 
   lowkey.sus("the vibes might be off 💀");

tests/index.test.js

@@ -256,3 +256,23 @@ test("Should replace chill with setTimeout", () => {
   }).code;
   expect(output).toEqual(expected);
 });
+
+test("Should replace sob emoji with semi-colon", () => {
+  const input = `statement😭`;
+  const expected = `"use strict";\n\nstatement;`;
+  const output = babel.transform(input, {
+    filename: "./../src/example.js",
+    plugins: [glowupVibes],
+  }).code;
+  expect(output).toEqual(expected);
+});
+
+test("Should not replace emoji in string literals", () => {
+  const input = `first = "\\"😭";\nsecond = '😭\\'';\nthird = \`😭\`;`;
+  const expected = `"use strict";\n\nfirst = "\\"😭";\nsecond = '😭\\'';\nthird = "\\uD83D\\uDE2D";`;
+  const output = babel.transform(input, {
+    filename: "./../src/example.js",
+    plugins: [glowupVibes],
+  }).code;
+  expect(output).toEqual(expected);
+});