graphql-codegen/lib/utilities/printing.js

Generate client code based on a GraphQL schema and query documents

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.join = join;
exports.block = block;
exports.wrap = wrap;
exports.indent = indent;
// Code generation helper functions copied from graphql-js (https://github.com/graphql/graphql-js)

/**
 * Given maybeArray, print an empty string if it is null or empty, otherwise
 * print all items together separated by separator if provided
 */
function join(maybeArray, separator) {
  return maybeArray ? maybeArray.filter(function (x) {
    return x;
  }).join(separator || '') : '';
}

/**
 * Given array, print each item on its own line, wrapped in an
 * indented "{ }" block.
 */
function block(array) {
  return array && array.length !== 0 ? indent('{\n' + join(array, '\n')) + '\n}' : '{}';
}

/**
 * If maybeString is not null or empty, then wrap with start and end, otherwise
 * print an empty string.
 */
function wrap(start, maybeString, end) {
  return maybeString ? start + maybeString + (end || '') : '';
}

function indent(maybeString) {
  return maybeString && maybeString.replace(/\n/g, '\n  ');
}