From c89848294f232b4ccd8f423ed64a6e44da35401c Mon Sep 17 00:00:00 2001
From: arodidev <51090527+arodidev@users.noreply.github.com>
Date: Tue, 11 Jun 2024 23:53:14 +0300
Subject: [PATCH] MVP

---
 src/utils/expression-runner.ts | 62 ++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/src/utils/expression-runner.ts b/src/utils/expression-runner.ts
index d64fd0147..6b5ce27c3 100644
--- a/src/utils/expression-runner.ts
+++ b/src/utils/expression-runner.ts
@@ -32,6 +32,68 @@ export function evaluateExpression(
     return null;
   }
 
+  const operators = [
+    '+',
+    '*',
+    '/',
+    '%',
+    '==',
+    '!=',
+    '===',
+    '!==',
+    '>',
+    '<',
+    '>=',
+    '<=',
+    '&&',
+    '||',
+    '&',
+    '|',
+    '^',
+    '~',
+    '<<',
+    '>>',
+    '>>>',
+    '+=',
+    '-=',
+    '*=',
+    '/=',
+    '%=',
+    '?:',
+    '?',
+    ':',
+    '=>',
+  ];
+
+  function splitter(delimiter: string, expression: string) {
+    return expression
+      .split(delimiter)
+      .map((item) => item.trim())
+      .join(` ${delimiter} `);
+  }
+
+  const expressionFormatter = (expression: string): string => {
+    let sanitizedExpression;
+
+    operators.forEach((operator) => {
+      const expressionParts = expression.split(operator).map((eachItem) => eachItem.trim());
+      if (expressionParts.length > 1) {
+        const [firstPart, lastPart] = expressionParts;
+
+        if (!/[a-zA-Z0-9']/.test(firstPart.charAt(firstPart.length - 1)) || !/[a-zA-Z0-9']/.test(lastPart?.charAt(0))) {
+          // these have been split by an invalid operator
+          console.log('split by invalid delimiter');
+        } else {
+          sanitizedExpression = splitter(operator, expression);
+        }
+      }
+    });
+
+    return sanitizedExpression;
+  };
+
+  expressionFormatter(expression);
+
   const allFieldsKeys = fields.map((f) => f.id);
   const parts = parseExpression(expression.trim());
   // register dependencies