30-seconds-of-code/node_modules/graphql/error/GraphQLError.mjs

import isObjectLike from '../jsutils/isObjectLike';
import { getLocation } from '../language/location';
import { printLocation, printSourceLocation } from '../language/printLocation';
/**
 * A GraphQLError describes an Error found during the parse, validate, or
 * execute phases of performing a GraphQL operation. In addition to a message
 * and stack trace, it also includes information about the locations in a
 * GraphQL document and/or execution result that correspond to the Error.
 */

export function GraphQLError( // eslint-disable-line no-redeclare
message, nodes, source, positions, path, originalError, extensions) {
  // Compute list of blame nodes.
  var _nodes = Array.isArray(nodes) ? nodes.length !== 0 ? nodes : undefined : nodes ? [nodes] : undefined; // Compute locations in the source for the given nodes/positions.


  var _source = source;

  if (!_source && _nodes) {
    var node = _nodes[0];
    _source = node && node.loc && node.loc.source;
  }

  var _positions = positions;

  if (!_positions && _nodes) {
    _positions = _nodes.reduce(function (list, node) {
      if (node.loc) {
        list.push(node.loc.start);
      }

      return list;
    }, []);
  }

  if (_positions && _positions.length === 0) {
    _positions = undefined;
  }

  var _locations;

  if (positions && source) {
    _locations = positions.map(function (pos) {
      return getLocation(source, pos);
    });
  } else if (_nodes) {
    _locations = _nodes.reduce(function (list, node) {
      if (node.loc) {
        list.push(getLocation(node.loc.source, node.loc.start));
      }

      return list;
    }, []);
  }

  var _extensions = extensions;

  if (_extensions == null && originalError != null) {
    var originalExtensions = originalError.extensions;

    if (isObjectLike(originalExtensions)) {
      _extensions = originalExtensions;
    }
  }

  Object.defineProperties(this, {
    message: {
      value: message,
      // By being enumerable, JSON.stringify will include `message` in the
      // resulting output. This ensures that the simplest possible GraphQL
      // service adheres to the spec.
      enumerable: true,
      writable: true
    },
    locations: {
      // Coercing falsey values to undefined ensures they will not be included
      // in JSON.stringify() when not provided.
      value: _locations || undefined,
      // By being enumerable, JSON.stringify will include `locations` in the
      // resulting output. This ensures that the simplest possible GraphQL
      // service adheres to the spec.
      enumerable: Boolean(_locations)
    },
    path: {
      // Coercing falsey values to undefined ensures they will not be included
      // in JSON.stringify() when not provided.
      value: path || undefined,
      // By being enumerable, JSON.stringify will include `path` in the
      // resulting output. This ensures that the simplest possible GraphQL
      // service adheres to the spec.
      enumerable: Boolean(path)
    },
    nodes: {
      value: _nodes || undefined
    },
    source: {
      value: _source || undefined
    },
    positions: {
      value: _positions || undefined
    },
    originalError: {
      value: originalError
    },
    extensions: {
      // Coercing falsey values to undefined ensures they will not be included
      // in JSON.stringify() when not provided.
      value: _extensions || undefined,
      // By being enumerable, JSON.stringify will include `path` in the
      // resulting output. This ensures that the simplest possible GraphQL
      // service adheres to the spec.
      enumerable: Boolean(_extensions)
    }
  }); // Include (non-enumerable) stack trace.

  if (originalError && originalError.stack) {
    Object.defineProperty(this, 'stack', {
      value: originalError.stack,
      writable: true,
      configurable: true
    });
  } else if (Error.captureStackTrace) {
    Error.captureStackTrace(this, GraphQLError);
  } else {
    Object.defineProperty(this, 'stack', {
      value: Error().stack,
      writable: true,
      configurable: true
    });
  }
}
GraphQLError.prototype = Object.create(Error.prototype, {
  constructor: {
    value: GraphQLError
  },
  name: {
    value: 'GraphQLError'
  },
  toString: {
    value: function toString() {
      return printError(this);
    }
  }
});
/**
 * Prints a GraphQLError to a string, representing useful location information
 * about the error's position in the source.
 */

export function printError(error) {
  var output = error.message;

  if (error.nodes) {
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = error.nodes[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        var node = _step.value;

        if (node.loc) {
          output += '\n\n' + printLocation(node.loc);
        }
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return != null) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }
  } else if (error.source && error.locations) {
    var _iteratorNormalCompletion2 = true;
    var _didIteratorError2 = false;
    var _iteratorError2 = undefined;

    try {
      for (var _iterator2 = error.locations[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
        var location = _step2.value;
        output += '\n\n' + printSourceLocation(error.source, location);
      }
    } catch (err) {
      _didIteratorError2 = true;
      _iteratorError2 = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion2 && _iterator2.return != null) {
          _iterator2.return();
        }
      } finally {
        if (_didIteratorError2) {
          throw _iteratorError2;
        }
      }
    }
  }

  return output;
}