refactor(ui): migrate env var field to react [EE-4853] (#8451)

app/react/components/form-components/EnvironmentVariablesFieldset/utils.ts

@@ -0,0 +1,53 @@
+import _ from 'lodash';
+
+import { EnvVar } from './types';
+
+export const KEY_REGEX = /(.+?)/.source;
+export const VALUE_REGEX = /(.*)?/.source;
+
+const KEY_VALUE_REGEX = new RegExp(`^(${KEY_REGEX})\\s*=(${VALUE_REGEX})$`);
+const NEWLINES_REGEX = /\n|\r|\r\n/;
+
+export function parseDotEnvFile(src: string) {
+  return parseArrayOfStrings(
+    _.compact(src.split(NEWLINES_REGEX))
+      .map((v) => v.trim())
+      .filter((v) => !v.startsWith('#') && v !== '')
+  );
+}
+
+export function parseArrayOfStrings(array: Array<string> = []): Array<EnvVar> {
+  if (!array) {
+    return [];
+  }
+
+  return _.compact(
+    array.map((variableString) => {
+      if (!variableString.includes('=')) {
+        return { name: variableString };
+      }
+
+      const parsedKeyValArr = variableString.trim().match(KEY_VALUE_REGEX);
+      if (parsedKeyValArr == null || parsedKeyValArr.length < 4) {
+        return null;
+      }
+
+      return {
+        name: parsedKeyValArr[1].trim(),
+        value: parsedKeyValArr[3].trim() || '',
+      };
+    })
+  );
+}
+
+export function convertToArrayOfStrings(array: Array<EnvVar>) {
+  if (!array) {
+    return [];
+  }
+
+  return array
+    .filter((variable) => variable.name)
+    .map(({ name, value }) =>
+      value || value === '' ? `${name}=${value}` : name
+    );
+}