Function countFunctions

javascript/src/customfunction.js:217–234

(expression)

  // Generate the name base by counting the number of custom functions
  // within the body.
  const countFunctions = (expression) => {
    const countNodes = (nodes) =>
        nodes.map(countNode).reduce((a, b) => a + b, 0);
    const countNode = (node) => {
      if (node.functionDefinitionValue) {
        return 1;
      } else if (node.arrayValue) {
        return countNodes(node.arrayValue.values);
      } else if (node.dictionaryValue) {
        return countNodes(Object.values(node.dictionaryValue.values));
      } else if (node.functionInvocationValue) {
        const fn = node.functionInvocationValue;
        return countNodes(Object.values(fn.arguments));
      }
      return 0;
    };
    return countNodes(Object.values(expression.values));
  };

  // There are three function building phases, which each call body.apply:
  // 1 - Check Return.  The constructor verifies that body.apply returns a