gatsby/dist/schema/schema.js

"use strict";

const _ = require(`lodash`);

const invariant = require(`invariant`);

const {
  isSpecifiedScalarType,
  isIntrospectionType,
  assertValidName,
  GraphQLNonNull,
  GraphQLList,
  GraphQLObjectType,
  GraphQLInterfaceType
} = require(`graphql`);

const {
  ObjectTypeComposer,
  InterfaceTypeComposer,
  UnionTypeComposer,
  InputTypeComposer,
  ScalarTypeComposer,
  EnumTypeComposer,
  defineFieldMapToConfig
} = require(`graphql-compose`);

const apiRunner = require(`../utils/api-runner-node`);

const report = require(`gatsby-cli/lib/reporter`);

const {
  addNodeInterfaceFields
} = require(`./types/node-interface`);

const {
  addInferredType,
  addInferredTypes
} = require(`./infer`);

const {
  findOne,
  findManyPaginated
} = require(`./resolvers`);

const {
  processFieldExtensions,
  internalExtensionNames
} = require(`./extensions`);

const {
  getPagination
} = require(`./types/pagination`);

const {
  getSortInput,
  SORTABLE_ENUM
} = require(`./types/sort`);

const {
  getFilterInput,
  SEARCHABLE_ENUM
} = require(`./types/filter`);

const {
  isGatsbyType,
  GatsbyGraphQLTypeKind
} = require(`./types/type-builders`);

const {
  isASTDocument,
  parseTypeDef,
  reportParsingError
} = require(`./types/type-defs`);

const {
  clearDerivedTypes
} = require(`./types/derived-types`);

const {
  printTypeDefinitions
} = require(`./print`);

const buildSchema = async ({
  schemaComposer,
  nodeStore,
  types,
  typeMapping,
  fieldExtensions,
  thirdPartySchemas,
  printConfig,
  typeConflictReporter,
  inferenceMetadata,
  parentSpan
}) => {
  await updateSchemaComposer({
    schemaComposer,
    nodeStore,
    types,
    typeMapping,
    fieldExtensions,
    thirdPartySchemas,
    printConfig,
    typeConflictReporter,
    inferenceMetadata,
    parentSpan
  }); // const { printSchema } = require(`graphql`)

  const schema = schemaComposer.buildSchema(); // console.log(printSchema(schema))

  return schema;
};

const rebuildSchemaWithSitePage = async ({
  schemaComposer,
  nodeStore,
  typeMapping,
  fieldExtensions,
  typeConflictReporter,
  inferenceMetadata,
  parentSpan
}) => {
  const typeComposer = schemaComposer.getOTC(`SitePage`); // Clear derived types and fields
  // they will be re-created in processTypeComposer later

  clearDerivedTypes({
    schemaComposer,
    typeComposer
  });
  const shouldInfer = !typeComposer.hasExtension(`infer`) || typeComposer.getExtension(`infer`) !== false;

  if (shouldInfer) {
    addInferredType({
      schemaComposer,
      typeComposer,
      nodeStore,
      typeConflictReporter,
      typeMapping,
      inferenceMetadata,
      parentSpan
    });
  }

  await processTypeComposer({
    schemaComposer,
    typeComposer,
    fieldExtensions,
    nodeStore,
    parentSpan
  });
  return schemaComposer.buildSchema();
};

module.exports = {
  buildSchema,
  rebuildSchemaWithSitePage
};

const updateSchemaComposer = async ({
  schemaComposer,
  nodeStore,
  types,
  typeMapping,
  fieldExtensions,
  thirdPartySchemas,
  printConfig,
  typeConflictReporter,
  inferenceMetadata,
  parentSpan
}) => {
  let activity = report.phantomActivity(`Add explicit types`, {
    parentSpan: parentSpan
  });
  activity.start();
  await addTypes({
    schemaComposer,
    parentSpan: activity.span,
    types
  });
  activity.end();
  activity = report.phantomActivity(`Add inferred types`, {
    parentSpan: parentSpan
  });
  activity.start();
  await addInferredTypes({
    schemaComposer,
    nodeStore,
    typeConflictReporter,
    typeMapping,
    inferenceMetadata,
    parentSpan: activity.span
  });
  activity.end();
  activity = report.phantomActivity(`Processing types`, {
    parentSpan: parentSpan
  });
  activity.start();
  await printTypeDefinitions({
    config: printConfig,
    schemaComposer,
    parentSpan: activity.span
  });
  await addSetFieldsOnGraphQLNodeTypeFields({
    schemaComposer,
    nodeStore,
    parentSpan: activity.span
  });
  await addConvenienceChildrenFields({
    schemaComposer,
    parentSpan: activity.span
  });
  await Promise.all(Array.from(new Set(schemaComposer.values())).map(typeComposer => processTypeComposer({
    schemaComposer,
    typeComposer,
    fieldExtensions,
    nodeStore,
    parentSpan: activity.span
  })));
  checkQueryableInterfaces({
    schemaComposer,
    parentSpan: activity.span
  });
  await addThirdPartySchemas({
    schemaComposer,
    thirdPartySchemas,
    parentSpan: activity.span
  });
  await addCustomResolveFunctions({
    schemaComposer,
    parentSpan: activity.span
  });
  activity.end();
};

const processTypeComposer = async ({
  schemaComposer,
  typeComposer,
  fieldExtensions,
  nodeStore,
  parentSpan
}) => {
  if (typeComposer instanceof ObjectTypeComposer) {
    await processFieldExtensions({
      schemaComposer,
      typeComposer,
      fieldExtensions,
      parentSpan
    });

    if (typeComposer.hasInterface(`Node`)) {
      await addNodeInterfaceFields({
        schemaComposer,
        typeComposer,
        parentSpan
      });
      await addImplicitConvenienceChildrenFields({
        schemaComposer,
        typeComposer,
        nodeStore,
        parentSpan
      });
    }

    await determineSearchableFields({
      schemaComposer,
      typeComposer,
      parentSpan
    });

    if (typeComposer.hasInterface(`Node`)) {
      await addTypeToRootQuery({
        schemaComposer,
        typeComposer,
        parentSpan
      });
    }
  } else if (typeComposer instanceof InterfaceTypeComposer) {
    if (typeComposer.getExtension(`nodeInterface`)) {
      // We only process field extensions for queryable Node interfaces, so we get
      // the input args on the root query type, e.g. `formatString` etc. for `dateformat`
      await processFieldExtensions({
        schemaComposer,
        typeComposer,
        fieldExtensions,
        parentSpan
      });
      await determineSearchableFields({
        schemaComposer,
        typeComposer,
        parentSpan
      });
      await addTypeToRootQuery({
        schemaComposer,
        typeComposer,
        parentSpan
      });
    }
  }
};

const fieldNames = {
  query: typeName => _.camelCase(typeName),
  queryAll: typeName => _.camelCase(`all ${typeName}`),
  convenienceChild: typeName => _.camelCase(`child ${typeName}`),
  convenienceChildren: typeName => _.camelCase(`children ${typeName}`)
};

const addTypes = ({
  schemaComposer,
  types,
  parentSpan
}) => {
  types.forEach(({
    typeOrTypeDef,
    plugin
  }) => {
    if (typeof typeOrTypeDef === `string`) {
      typeOrTypeDef = parseTypeDef(typeOrTypeDef);
    }

    if (isASTDocument(typeOrTypeDef)) {
      let parsedTypes;
      const createdFrom = `sdl`;

      try {
        parsedTypes = parseTypes({
          doc: typeOrTypeDef,
          plugin,
          createdFrom,
          schemaComposer,
          parentSpan
        });
      } catch (error) {
        reportParsingError(error);
        return;
      }

      parsedTypes.forEach(type => {
        processAddedType({
          schemaComposer,
          type,
          parentSpan,
          createdFrom,
          plugin
        });
      });
    } else if (isGatsbyType(typeOrTypeDef)) {
      const type = createTypeComposerFromGatsbyType({
        schemaComposer,
        type: typeOrTypeDef,
        parentSpan
      });

      if (type) {
        const typeName = type.getTypeName();
        const createdFrom = `typeBuilder`;
        checkIsAllowedTypeName(typeName);

        if (schemaComposer.has(typeName)) {
          const typeComposer = schemaComposer.get(typeName);
          mergeTypes({
            schemaComposer,
            typeComposer,
            type,
            plugin,
            createdFrom,
            parentSpan
          });
        } else {
          processAddedType({
            schemaComposer,
            type,
            parentSpan,
            createdFrom,
            plugin
          });
        }
      }
    } else {
      const typeName = typeOrTypeDef.name;
      const createdFrom = `graphql-js`;
      checkIsAllowedTypeName(typeName);

      if (schemaComposer.has(typeName)) {
        const typeComposer = schemaComposer.get(typeName);
        mergeTypes({
          schemaComposer,
          typeComposer,
          type: typeOrTypeDef,
          plugin,
          createdFrom,
          parentSpan
        });
      } else {
        processAddedType({
          schemaComposer,
          type: typeOrTypeDef,
          parentSpan,
          createdFrom,
          plugin
        });
      }
    }
  });
};

const mergeTypes = ({
  schemaComposer,
  typeComposer,
  type,
  plugin,
  createdFrom,
  parentSpan
}) => {
  // Only allow user or plugin owning the type to extend already existing type.
  const typeOwner = typeComposer.getExtension(`plugin`);

  if (!plugin || plugin.name === `default-site-plugin` || plugin.name === typeOwner) {
    if (type instanceof ObjectTypeComposer) {
      mergeFields({
        typeComposer,
        fields: type.getFields()
      });
      type.getInterfaces().forEach(iface => typeComposer.addInterface(iface));
    } else if (type instanceof InterfaceTypeComposer) {
      mergeFields({
        typeComposer,
        fields: type.getFields()
      });
    } else if (type instanceof GraphQLObjectType) {
      mergeFields({
        typeComposer,
        fields: defineFieldMapToConfig(type.getFields())
      });
      type.getInterfaces().forEach(iface => typeComposer.addInterface(iface));
    } else if (type instanceof GraphQLInterfaceType) {
      mergeFields({
        typeComposer,
        fields: defineFieldMapToConfig(type.getFields())
      });
    }

    if (isNamedTypeComposer(type)) {
      typeComposer.extendExtensions(type.getExtensions());
    }

    addExtensions({
      schemaComposer,
      typeComposer,
      plugin,
      createdFrom
    });
    return true;
  } else {
    report.warn(`Plugin \`${plugin.name}\` tried to define the GraphQL type ` + `\`${typeComposer.getTypeName()}\`, which has already been defined ` + `by the plugin \`${typeOwner}\`.`);
    return false;
  }
};

const processAddedType = ({
  schemaComposer,
  type,
  parentSpan,
  createdFrom,
  plugin
}) => {
  const typeName = schemaComposer.addAsComposer(type);
  const typeComposer = schemaComposer.get(typeName);

  if (typeComposer instanceof InterfaceTypeComposer || typeComposer instanceof UnionTypeComposer) {
    if (!typeComposer.getResolveType()) {
      typeComposer.setResolveType(node => node.internal.type);
    }
  }

  schemaComposer.addSchemaMustHaveType(typeComposer);
  addExtensions({
    schemaComposer,
    typeComposer,
    plugin,
    createdFrom
  });
  return typeComposer;
};

const addExtensions = ({
  schemaComposer,
  typeComposer,
  plugin,
  createdFrom
}) => {
  typeComposer.setExtension(`createdFrom`, createdFrom);
  typeComposer.setExtension(`plugin`, plugin ? plugin.name : null);

  if (createdFrom === `sdl`) {
    const directives = typeComposer.getDirectives();
    directives.forEach(({
      name,
      args
    }) => {
      switch (name) {
        case `infer`:
        case `dontInfer`:
          {
            typeComposer.setExtension(`infer`, name === `infer`);

            if (args.noDefaultResolvers != null) {
              typeComposer.setExtension(`addDefaultResolvers`, !args.noDefaultResolvers);
            }

            break;
          }

        case `mimeTypes`:
          typeComposer.setExtension(`mimeTypes`, args);
          break;

        case `childOf`:
          typeComposer.setExtension(`childOf`, args);
          break;

        case `nodeInterface`:
          if (typeComposer instanceof InterfaceTypeComposer) {
            if (!typeComposer.hasField(`id`) || typeComposer.getFieldType(`id`).toString() !== `ID!`) {
              report.panic(`Interfaces with the \`nodeInterface\` extension must have a field ` + `\`id\` of type \`ID!\`. Check the type definition of ` + `\`${typeComposer.getTypeName()}\`.`);
            }

            typeComposer.setExtension(`nodeInterface`, true);
          }

          break;

        default:
      }
    });
  }

  if (typeComposer instanceof ObjectTypeComposer || typeComposer instanceof InterfaceTypeComposer || typeComposer instanceof InputTypeComposer) {
    typeComposer.getFieldNames().forEach(fieldName => {
      typeComposer.setFieldExtension(fieldName, `createdFrom`, createdFrom);
      typeComposer.setFieldExtension(fieldName, `plugin`, plugin ? plugin.name : null);

      if (createdFrom === `sdl`) {
        const directives = typeComposer.getFieldDirectives(fieldName);
        directives.forEach(({
          name,
          args
        }) => {
          typeComposer.setFieldExtension(fieldName, name, args);
        });
      } // Validate field extension args. `graphql-compose` already checks the
      // type of directive args in `parseDirectives`, but we want to check
      // extensions provided with type builders as well. Also, we warn if an
      // extension option was provided which does not exist in the field
      // extension definition.


      const fieldExtensions = typeComposer.getFieldExtensions(fieldName);
      const typeName = typeComposer.getTypeName();
      Object.keys(fieldExtensions).filter(name => !internalExtensionNames.includes(name)).forEach(name => {
        const args = fieldExtensions[name];

        if (!args || typeof args !== `object`) {
          report.error(`Field extension arguments must be provided as an object. ` + `Received "${args}" on \`${typeName}.${fieldName}\`.`);
          return;
        }

        try {
          const definition = schemaComposer.getDirective(name); // Handle `defaultValue` when not provided as directive

          definition.args.forEach(({
            name,
            defaultValue
          }) => {
            if (args[name] === undefined && defaultValue !== undefined) {
              args[name] = defaultValue;
            }
          });
          Object.keys(args).forEach(arg => {
            const argumentDef = definition.args.find(({
              name
            }) => name === arg);

            if (!argumentDef) {
              report.error(`Field extension \`${name}\` on \`${typeName}.${fieldName}\` ` + `has invalid argument \`${arg}\`.`);
              return;
            }

            const value = args[arg];

            try {
              validate(argumentDef.type, value);
            } catch (error) {
              report.error(`Field extension \`${name}\` on \`${typeName}.${fieldName}\` ` + `has argument \`${arg}\` with invalid value "${value}". ` + error.message);
            }
          });
        } catch (error) {
          report.error(`Field extension \`${name}\` on \`${typeName}.${fieldName}\` ` + `is not available.`);
        }
      });
    });
  }

  if (typeComposer.hasExtension(`addDefaultResolvers`)) {
    report.warn(`Deprecation warning - "noDefaultResolvers" is deprecated. In Gatsby 3, ` + `defined fields won't get resolvers, unless explicitly added with a ` + `directive/extension.`);
  }

  return typeComposer;
};

const checkIsAllowedTypeName = name => {
  invariant(name !== `Node`, `The GraphQL type \`Node\` is reserved for internal use.`);
  invariant(!name.endsWith(`FilterInput`) && !name.endsWith(`SortInput`), `GraphQL type names ending with "FilterInput" or "SortInput" are ` + `reserved for internal use. Please rename \`${name}\`.`);
  invariant(![`Boolean`, `Date`, `Float`, `ID`, `Int`, `JSON`, `String`].includes(name), `The GraphQL type \`${name}\` is reserved for internal use by ` + `built-in scalar types.`);
  assertValidName(name);
};

const createTypeComposerFromGatsbyType = ({
  schemaComposer,
  type,
  parentSpan
}) => {
  switch (type.kind) {
    case GatsbyGraphQLTypeKind.OBJECT:
      {
        return ObjectTypeComposer.createTemp(Object.assign({}, type.config, {
          interfaces: () => {
            if (type.config.interfaces) {
              return type.config.interfaces.map(iface => {
                if (typeof iface === `string`) {
                  return schemaComposer.getIFTC(iface).getType();
                } else {
                  return iface;
                }
              });
            } else {
              return [];
            }
          }
        }), schemaComposer);
      }

    case GatsbyGraphQLTypeKind.INPUT_OBJECT:
      {
        return InputTypeComposer.createTemp(type.config, schemaComposer);
      }

    case GatsbyGraphQLTypeKind.UNION:
      {
        return UnionTypeComposer.createTemp(Object.assign({}, type.config, {
          types: () => {
            if (type.config.types) {
              return type.config.types.map(typeName => schemaComposer.getOTC(typeName).getType());
            } else {
              return [];
            }
          }
        }), schemaComposer);
      }

    case GatsbyGraphQLTypeKind.INTERFACE:
      {
        return InterfaceTypeComposer.createTemp(type.config, schemaComposer);
      }

    case GatsbyGraphQLTypeKind.ENUM:
      {
        return EnumTypeComposer.createTemp(type.config, schemaComposer);
      }

    case GatsbyGraphQLTypeKind.SCALAR:
      {
        return ScalarTypeComposer.createTemp(type.config, schemaComposer);
      }

    default:
      {
        report.warn(`Illegal type definition: ${JSON.stringify(type.config)}`);
        return null;
      }
  }
};

const addSetFieldsOnGraphQLNodeTypeFields = ({
  schemaComposer,
  nodeStore,
  parentSpan
}) => Promise.all(Array.from(schemaComposer.values()).map(async tc => {
  if (tc instanceof ObjectTypeComposer && tc.hasInterface(`Node`)) {
    const typeName = tc.getTypeName();
    const result = await apiRunner(`setFieldsOnGraphQLNodeType`, {
      type: {
        name: typeName,
        nodes: nodeStore.getNodesByType(typeName)
      },
      traceId: `initial-setFieldsOnGraphQLNodeType`,
      parentSpan
    });

    if (result) {
      // NOTE: `setFieldsOnGraphQLNodeType` only allows setting
      // nested fields with a path as property name, i.e.
      // `{ 'frontmatter.published': 'Boolean' }`, but not in the form
      // `{ frontmatter: { published: 'Boolean' }}`
      result.forEach(fields => tc.addNestedFields(fields));
    }
  }
}));

const addThirdPartySchemas = ({
  schemaComposer,
  thirdPartySchemas,
  parentSpan
}) => {
  thirdPartySchemas.forEach(schema => {
    const schemaQueryType = schema.getQueryType();
    const queryTC = schemaComposer.createTempTC(schemaQueryType);
    processThirdPartyTypeFields({
      typeComposer: queryTC,
      schemaQueryType
    });
    schemaComposer.Query.addFields(queryTC.getFields()); // Explicitly add the third-party schema's types, so they can be targeted
    // in `createResolvers` API.

    const types = schema.getTypeMap();
    Object.keys(types).forEach(typeName => {
      const type = types[typeName];

      if (type !== schemaQueryType && !isSpecifiedScalarType(type) && !isIntrospectionType(type) && type.name !== `Date` && type.name !== `JSON`) {
        const typeComposer = schemaComposer.createTC(type);

        if (typeComposer instanceof ObjectTypeComposer || typeComposer instanceof InterfaceTypeComposer) {
          processThirdPartyTypeFields({
            typeComposer,
            schemaQueryType
          });
        }

        typeComposer.setExtension(`createdFrom`, `thirdPartySchema`);
        schemaComposer.addSchemaMustHaveType(typeComposer);
      }
    });
  });
};

const resetOverriddenThirdPartyTypeFields = ({
  typeComposer
}) => {
  // The problem: createResolvers API mutates third party schema instance.
  //   For example it can add a new field referencing a type from our main schema
  //   Then if we rebuild the schema this old type instance will sneak into
  //   the new schema and produce the famous error:
  //   "Schema must contain uniquely named types but contains multiple types named X"
  // This function only affects schema rebuilding pathway.
  //   It cleans up artifacts created by the `createResolvers` API of the previous build
  //   so that we return the third party schema to its initial state (hence can safely re-add)
  // TODO: the right way to fix this would be not to mutate the third party schema in
  //   the first place. But unfortunately mutation happens in the `graphql-compose`
  //   and we don't have an easy way to avoid it without major rework
  typeComposer.getFieldNames().forEach(fieldName => {
    const createdFrom = typeComposer.getFieldExtension(fieldName, `createdFrom`);

    if (createdFrom === `createResolvers`) {
      typeComposer.removeField(fieldName);
      return;
    }

    const config = typeComposer.getFieldExtension(fieldName, `originalFieldConfig`);

    if (config) {
      typeComposer.removeField(fieldName);
      typeComposer.addFields({
        [fieldName]: config
      });
    }
  });
};

const processThirdPartyTypeFields = ({
  typeComposer,
  schemaQueryType
}) => {
  resetOverriddenThirdPartyTypeFields({
    typeComposer
  }); // Fix for types that refer to Query. Thanks Relay Classic!

  typeComposer.getFieldNames().forEach(fieldName => {
    // Remove customization that we could have added via `createResolvers`
    // to make it work with schema rebuilding
    const field = typeComposer.getField(fieldName);
    const fieldType = field.type.toString();

    if (fieldType.replace(/[[\]!]/g, ``) === schemaQueryType.name) {
      typeComposer.extendField(fieldName, {
        type: fieldType.replace(schemaQueryType.name, `Query`)
      });
    }
  });
};

const addCustomResolveFunctions = async ({
  schemaComposer,
  parentSpan
}) => {
  const intermediateSchema = schemaComposer.buildSchema();

  const createResolvers = resolvers => {
    Object.keys(resolvers).forEach(typeName => {
      const fields = resolvers[typeName];

      if (schemaComposer.has(typeName)) {
        const tc = schemaComposer.getOTC(typeName);
        Object.keys(fields).forEach(fieldName => {
          const fieldConfig = fields[fieldName];

          if (tc.hasField(fieldName)) {
            const originalFieldConfig = tc.getFieldConfig(fieldName);
            const originalTypeName = originalFieldConfig.type.toString();
            const originalResolver = originalFieldConfig.resolve;
            let fieldTypeName;

            if (fieldConfig.type) {
              fieldTypeName = Array.isArray(fieldConfig.type) ? stringifyArray(fieldConfig.type) : fieldConfig.type.toString();
            }

            if (!fieldTypeName || fieldTypeName.replace(/!/g, ``) === originalTypeName.replace(/!/g, ``) || tc.getExtension(`createdFrom`) === `thirdPartySchema`) {
              const newConfig = {};

              if (fieldConfig.type) {
                newConfig.type = fieldConfig.type;
              }

              if (fieldConfig.args) {
                newConfig.args = fieldConfig.args;
              }

              if (fieldConfig.resolve) {
                newConfig.resolve = (source, args, context, info) => fieldConfig.resolve(source, args, context, Object.assign({}, info, {
                  originalResolver: originalResolver || context.defaultFieldResolver
                }));

                tc.extendFieldExtensions(fieldName, {
                  needsResolve: true
                });
              }

              tc.extendField(fieldName, newConfig); // See resetOverriddenThirdPartyTypeFields for explanation

              if (tc.getExtension(`createdFrom`) === `thirdPartySchema`) {
                tc.setFieldExtension(fieldName, `originalFieldConfig`, originalFieldConfig);
              }
            } else if (fieldTypeName) {
              report.warn(`\`createResolvers\` passed resolvers for field ` + `\`${typeName}.${fieldName}\` with type \`${fieldTypeName}\`. ` + `Such a field with type \`${originalTypeName}\` already exists ` + `on the type. Use \`createTypes\` to override type fields.`);
            }
          } else {
            tc.addFields({
              [fieldName]: fieldConfig
            }); // See resetOverriddenThirdPartyTypeFields for explanation

            tc.setFieldExtension(fieldName, `createdFrom`, `createResolvers`);
          }
        });
      } else {
        report.warn(`\`createResolvers\` passed resolvers for type \`${typeName}\` that ` + `doesn't exist in the schema. Use \`createTypes\` to add the type ` + `before adding resolvers.`);
      }
    });
  };

  await apiRunner(`createResolvers`, {
    intermediateSchema,
    createResolvers,
    traceId: `initial-createResolvers`,
    parentSpan
  });
};

const determineSearchableFields = ({
  schemaComposer,
  typeComposer
}) => {
  typeComposer.getFieldNames().forEach(fieldName => {
    const field = typeComposer.getField(fieldName);
    const extensions = typeComposer.getFieldExtensions(fieldName);

    if (field.resolve) {
      if (extensions.dateformat) {
        typeComposer.extendFieldExtensions(fieldName, {
          searchable: SEARCHABLE_ENUM.SEARCHABLE,
          sortable: SORTABLE_ENUM.SORTABLE,
          needsResolve: extensions.proxy ? true : false
        });
      } else if (!_.isEmpty(field.args)) {
        typeComposer.extendFieldExtensions(fieldName, {
          searchable: SEARCHABLE_ENUM.DEPRECATED_SEARCHABLE,
          sortable: SORTABLE_ENUM.DEPRECATED_SORTABLE,
          needsResolve: true
        });
      } else {
        typeComposer.extendFieldExtensions(fieldName, {
          searchable: SEARCHABLE_ENUM.SEARCHABLE,
          sortable: SORTABLE_ENUM.SORTABLE,
          needsResolve: true
        });
      }
    } else {
      typeComposer.extendFieldExtensions(fieldName, {
        searchable: SEARCHABLE_ENUM.SEARCHABLE,
        sortable: SORTABLE_ENUM.SORTABLE,
        needsResolve: false
      });
    }
  });
};

const addConvenienceChildrenFields = ({
  schemaComposer
}) => {
  const parentTypesToChildren = new Map();
  const mimeTypesToChildren = new Map();
  const typesHandlingMimeTypes = new Map();
  schemaComposer.forEach(type => {
    if ((type instanceof ObjectTypeComposer || type instanceof InterfaceTypeComposer) && type.hasExtension(`mimeTypes`)) {
      const {
        types
      } = type.getExtension(`mimeTypes`);
      new Set(types).forEach(mimeType => {
        if (!typesHandlingMimeTypes.has(mimeType)) {
          typesHandlingMimeTypes.set(mimeType, new Set());
        }

        typesHandlingMimeTypes.get(mimeType).add(type);
      });
    }

    if ((type instanceof ObjectTypeComposer || type instanceof InterfaceTypeComposer) && type.hasExtension(`childOf`)) {
      if (type instanceof ObjectTypeComposer && !type.hasInterface(`Node`)) {
        report.error(`The \`childOf\` extension can only be used on types that implement the \`Node\` interface.\n` + `Check the type definition of \`${type.getTypeName()}\`.`);
        return;
      }

      if (type instanceof InterfaceTypeComposer && !type.hasExtension(`nodeInterface`)) {
        report.error(`The \`childOf\` extension can only be used on interface types that ` + `have the \`@nodeInterface\` extension.\n` + `Check the type definition of \`${type.getTypeName()}\`.`);
        return;
      }

      const {
        types,
        mimeTypes,
        many
      } = type.getExtension(`childOf`);
      new Set(types).forEach(parentType => {
        if (!parentTypesToChildren.has(parentType)) {
          parentTypesToChildren.set(parentType, new Map());
        }

        parentTypesToChildren.get(parentType).set(type, many);
      });
      new Set(mimeTypes).forEach(mimeType => {
        if (!mimeTypesToChildren.has(mimeType)) {
          mimeTypesToChildren.set(mimeType, new Map());
        }

        mimeTypesToChildren.get(mimeType).set(type, many);
      });
    }
  });
  parentTypesToChildren.forEach((children, parent) => {
    if (!schemaComposer.has(parent)) return;
    const typeComposer = schemaComposer.getAnyTC(parent);

    if (typeComposer instanceof InterfaceTypeComposer && !typeComposer.hasExtension(`nodeInterface`)) {
      report.error(`With the \`childOf\` extension, children fields can only be added to ` + `interfaces which have the \`@nodeInterface\` extension.\n` + `Check the type definition of \`${typeComposer.getTypeName()}\`.`);
      return;
    }

    children.forEach((many, child) => {
      if (many) {
        typeComposer.addFields(createChildrenField(child.getTypeName()));
      } else {
        typeComposer.addFields(createChildField(child.getTypeName()));
      }
    });
  });
  mimeTypesToChildren.forEach((children, mimeType) => {
    const parentTypes = typesHandlingMimeTypes.get(mimeType);

    if (parentTypes) {
      parentTypes.forEach(typeComposer => {
        if (typeComposer instanceof InterfaceTypeComposer && !typeComposer.hasExtension(`nodeInterface`)) {
          report.error(`With the \`childOf\` extension, children fields can only be added to ` + `interfaces which have the \`@nodeInterface\` extension.\n` + `Check the type definition of \`${typeComposer.getTypeName()}\`.`);
          return;
        }

        children.forEach((many, child) => {
          if (many) {
            typeComposer.addFields(createChildrenField(child.getTypeName()));
          } else {
            typeComposer.addFields(createChildField(child.getTypeName()));
          }
        });
      });
    }
  });
};

const addImplicitConvenienceChildrenFields = ({
  schemaComposer,
  typeComposer,
  nodeStore
}) => {
  const shouldInfer = typeComposer.getExtension(`infer`); // In Gatsby v3, when `@dontInfer` is set, children fields will not be
  // created for parent-child relations set by plugins with
  // `createParentChildLink`. With `@dontInfer`, only parent-child
  // relations explicitly set with the `childOf` extension will be added.
  // if (shouldInfer === false) return

  const parentTypeName = typeComposer.getTypeName();
  const nodes = nodeStore.getNodesByType(parentTypeName);
  const childNodesByType = groupChildNodesByType({
    nodeStore,
    nodes
  });
  Object.keys(childNodesByType).forEach(typeName => {
    const typeChildren = childNodesByType[typeName];

    const maxChildCount = _.maxBy(_.values(_.groupBy(typeChildren, c => c.parent)), g => g.length).length; // Adding children fields to types with the `@dontInfer` extension is deprecated


    if (shouldInfer === false) {
      const childTypeComposer = schemaComposer.getAnyTC(typeName);
      const childOfExtension = childTypeComposer.getExtension(`childOf`);
      const many = maxChildCount > 1; // Only warn when the parent-child relation has not been explicitly set with

      if (!childOfExtension || !childOfExtension.types.includes(parentTypeName) || !childOfExtension.many === many) {
        const fieldName = many ? fieldNames.convenienceChildren(typeName) : fieldNames.convenienceChild(typeName);
        report.warn(`The type \`${parentTypeName}\` does not explicitly define ` + `the field \`${fieldName}\`.\n` + `On types with the \`@dontInfer\` directive, or with the \`infer\` ` + `extension set to \`false\`, automatically adding fields for ` + `children types is deprecated.\n` + `In Gatsby v3, only children fields explicitly set with the ` + `\`childOf\` extension will be added.\n`);
      }
    }

    if (maxChildCount > 1) {
      typeComposer.addFields(createChildrenField(typeName));
    } else {
      typeComposer.addFields(createChildField(typeName));
    }
  });
};

const createChildrenField = typeName => {
  return {
    [fieldNames.convenienceChildren(typeName)]: {
      type: () => [typeName],

      resolve(source, args, context) {
        const {
          path
        } = context;
        return context.nodeModel.getNodesByIds({
          ids: source.children,
          type: typeName
        }, {
          path
        });
      }

    }
  };
};

const createChildField = typeName => {
  return {
    [fieldNames.convenienceChild(typeName)]: {
      type: () => typeName,

      async resolve(source, args, context) {
        const {
          path
        } = context;
        const result = await context.nodeModel.getNodesByIds({
          ids: source.children,
          type: typeName
        }, {
          path
        });

        if (result && result.length > 0) {
          return result[0];
        } else {
          return null;
        }
      }

    }
  };
};

const groupChildNodesByType = ({
  nodeStore,
  nodes
}) => _(nodes).flatMap(node => (node.children || []).map(nodeStore.getNode).filter(Boolean)).groupBy(node => node.internal ? node.internal.type : undefined).value();

const addTypeToRootQuery = ({
  schemaComposer,
  typeComposer
}) => {
  const sortInputTC = getSortInput({
    schemaComposer,
    typeComposer
  });
  const filterInputTC = getFilterInput({
    schemaComposer,
    typeComposer
  });
  const paginationTC = getPagination({
    schemaComposer,
    typeComposer
  });
  const typeName = typeComposer.getTypeName(); // not strictly correctly, result is `npmPackage` and `allNpmPackage` from type `NPMPackage`

  const queryName = fieldNames.query(typeName);
  const queryNamePlural = fieldNames.queryAll(typeName);
  schemaComposer.Query.addFields({
    [queryName]: {
      type: typeComposer,
      args: Object.assign({}, filterInputTC.getFields()),
      resolve: findOne(typeName)
    },
    [queryNamePlural]: {
      type: paginationTC,
      args: {
        filter: filterInputTC,
        sort: sortInputTC,
        skip: `Int`,
        limit: `Int`
      },
      resolve: findManyPaginated(typeName)
    }
  }).makeFieldNonNull(queryNamePlural);
};

const parseTypes = ({
  doc,
  plugin,
  createdFrom,
  schemaComposer,
  parentSpan
}) => {
  const types = [];
  doc.definitions.forEach(def => {
    const name = def.name.value;
    checkIsAllowedTypeName(name);

    if (schemaComposer.has(name)) {
      // We don't check if ast.kind matches composer type, but rely
      // that this will throw when something is wrong and get
      // reported by `reportParsingError`.
      // Keep the original type composer around
      const typeComposer = schemaComposer.get(name); // After this, the parsed type composer will be registered as the composer
      // handling the type name

      const parsedType = schemaComposer.typeMapper.makeSchemaDef(def); // Merge the parsed type with the original

      mergeTypes({
        schemaComposer,
        typeComposer,
        type: parsedType,
        plugin,
        createdFrom,
        parentSpan
      }); // Set the original type composer (with the merged fields added)
      // as the correct composer for the type name

      schemaComposer.typeMapper.set(typeComposer.getTypeName(), typeComposer);
    } else {
      const parsedType = schemaComposer.typeMapper.makeSchemaDef(def);
      types.push(parsedType);
    }
  });
  return types;
};

const stringifyArray = arr => `[${arr.map(item => Array.isArray(item) ? stringifyArray(item) : item.toString())}]`; // TODO: Import this directly from graphql-compose once we update to v7


const isNamedTypeComposer = type => type instanceof ObjectTypeComposer || type instanceof InputTypeComposer || type instanceof ScalarTypeComposer || type instanceof EnumTypeComposer || type instanceof InterfaceTypeComposer || type instanceof UnionTypeComposer;

const validate = (type, value) => {
  if (type instanceof GraphQLNonNull) {
    if (value == null) {
      throw new Error(`Expected non-null field value.`);
    }

    return validate(type.ofType, value);
  } else if (type instanceof GraphQLList) {
    if (!Array.isArray(value)) {
      throw new Error(`Expected array field value.`);
    }

    return value.map(v => validate(type.ofType, v));
  } else {
    return type.parseValue(value);
  }
};

const checkQueryableInterfaces = ({
  schemaComposer
}) => {
  const queryableInterfaces = new Set();
  schemaComposer.forEach(type => {
    if (type instanceof InterfaceTypeComposer && type.getExtension(`nodeInterface`)) {
      queryableInterfaces.add(type.getTypeName());
    }
  });
  const incorrectTypes = [];
  schemaComposer.forEach(type => {
    if (type instanceof ObjectTypeComposer) {
      const interfaces = type.getInterfaces();

      if (interfaces.some(iface => queryableInterfaces.has(iface.name)) && !type.hasInterface(`Node`)) {
        incorrectTypes.push(type.getTypeName());
      }
    }
  });

  if (incorrectTypes.length) {
    report.panic(`Interfaces with the \`nodeInterface\` extension must only be ` + `implemented by types which also implement the \`Node\` ` + `interface. Check the type definition of ` + `${incorrectTypes.map(t => `\`${t}\``).join(`, `)}.`);
  }
};

const mergeFields = ({
  typeComposer,
  fields
}) => Object.entries(fields).forEach(([fieldName, fieldConfig]) => {
  if (typeComposer.hasField(fieldName)) {
    typeComposer.extendField(fieldName, fieldConfig);
  } else {
    typeComposer.setField(fieldName, fieldConfig);
  }
});
//# sourceMappingURL=schema.js.map