mod_utils_envReplace.js

/**
@module /utils/envReplace
@requires module:/utils/processEnv
*/

/**
@function envReplace 
@description
The envReplace method finds occurances of ${...} in a stringified object and substitutes the template variables with values from matched xyzEnv variables.

The template variable ${RESOURCE} will be substituted with the xyzEnv.SRC_RESOURCE value.

Template variables not defined in the xyzEnv will not be replaced.

@param {Obeckt} obj 
@returns {json} safeObject 
*/

export default function envReplace(obj) {
  // Convert the input object to a JSON string
  const str = JSON.stringify(obj).replace(
    /\$\{([A-Za-z0-9_\s]*)\}/g,
    (matched) => {
      // Remove template brackets from matched param.
      const param = matched.replace(/\$\{|\}/g, '');

      // Find substitute value from xyzEnv SRC_* variable.
      const change = xyzEnv[`SRC_${param}`] || matched;

      return change;
    },
  );

  return JSON.parse(str);
}