@odjs/classes/dist/classes.js

'use strict';

function eachTrue(base, callback, output) {
  for (var key in base) {
    if (base[key]) {
      output = callback(key, output);
    }
  }

  return output;
}

function normStrings(names, value, output) {
  var length = names.length;

  for (var i = 0; i < length; i++) {
    if (names[i]) {
      output[names[i]] = value;
    }
  }

  return output;
}

function processItem(item, output) {
  if (item && typeof item === 'object') {
    if (Array.isArray(item)) {
      normArray(item, output);
    } else {
      for (var key in item) {
        if ({}.hasOwnProperty.call(item, key)) {
          if (key) {
            var value = item[key];

            if (typeof value === 'function') {
              value = value(eachTrue(output, function (key, result) {
                result[key] = true;
                return result;
              }, {}), key.split(' '));
            }

            normStrings(key.split(' '), !!value, output);
          }
        }
      }
    }
  } else if (typeof item === 'function') {
    processItem(item(eachTrue(output, function (key, result) {
      result[key] = true;
      return result;
    }, {})), output);
  } else if (item != null) {
    var names = "" + item;

    if (names) {
      normStrings(names.split(' '), true, output);
    }
  }
}

function normArray(array, output) {
  var length = array.length;

  for (var i = 0; i < length; i++) {
    var item = array[i];
    processItem(item, output);
  }

  return output;
}

function classes() {
  return eachTrue(normArray(arguments, {}), function (name, result) {
    return result ? result + " " + name : name;
  }, '');
}

module.exports = classes;
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