mirror of
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194 lines
6.6 KiB
TypeScript
194 lines
6.6 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/execution/values.js
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import find from '../polyfills/find.js';
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import keyMap from '../jsutils/keyMap.js';
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import inspect from '../jsutils/inspect.js';
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import printPathArray from '../jsutils/printPathArray.js';
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import { GraphQLError } from '../error/GraphQLError.js';
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import { Kind } from '../language/kinds.js';
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import { print } from '../language/printer.js';
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import { isInputType, isNonNullType } from '../type/definition.js';
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import { typeFromAST } from '../utilities/typeFromAST.js';
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import { valueFromAST } from '../utilities/valueFromAST.js';
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import { coerceInputValue } from '../utilities/coerceInputValue.js';
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/**
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* Prepares an object map of variableValues of the correct type based on the
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* provided variable definitions and arbitrary input. If the input cannot be
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* parsed to match the variable definitions, a GraphQLError will be thrown.
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*
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* Note: The returned value is a plain Object with a prototype, since it is
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* exposed to user code. Care should be taken to not pull values from the
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* Object prototype.
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*
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* @internal
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*/
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export function getVariableValues(schema, varDefNodes, inputs, options) {
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const errors = [];
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const maxErrors = options?.maxErrors;
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try {
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const coerced = coerceVariableValues(schema, varDefNodes, inputs, error => {
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if (maxErrors != null && errors.length >= maxErrors) {
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throw new GraphQLError('Too many errors processing variables, error limit reached. Execution aborted.');
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}
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errors.push(error);
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});
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if (errors.length === 0) {
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return {
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coerced
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};
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}
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} catch (error) {
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errors.push(error);
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}
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return {
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errors
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};
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}
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function coerceVariableValues(schema, varDefNodes, inputs, onError) {
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const coercedValues = {};
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for (const varDefNode of varDefNodes) {
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const varName = varDefNode.variable.name.value;
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const varType = typeFromAST(schema, varDefNode.type);
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if (!isInputType(varType)) {
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// Must use input types for variables. This should be caught during
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// validation, however is checked again here for safety.
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const varTypeStr = print(varDefNode.type);
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onError(new GraphQLError(`Variable "$${varName}" expected value of type "${varTypeStr}" which cannot be used as an input type.`, varDefNode.type));
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continue;
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}
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if (!hasOwnProperty(inputs, varName)) {
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if (varDefNode.defaultValue) {
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coercedValues[varName] = valueFromAST(varDefNode.defaultValue, varType);
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} else if (isNonNullType(varType)) {
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const varTypeStr = inspect(varType);
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onError(new GraphQLError(`Variable "$${varName}" of required type "${varTypeStr}" was not provided.`, varDefNode));
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}
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continue;
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}
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const value = inputs[varName];
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if (value === null && isNonNullType(varType)) {
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const varTypeStr = inspect(varType);
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onError(new GraphQLError(`Variable "$${varName}" of non-null type "${varTypeStr}" must not be null.`, varDefNode));
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continue;
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}
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coercedValues[varName] = coerceInputValue(value, varType, (path, invalidValue, error) => {
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let prefix = `Variable "$${varName}" got invalid value ` + inspect(invalidValue);
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if (path.length > 0) {
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prefix += ` at "${varName}${printPathArray(path)}"`;
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}
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onError(new GraphQLError(prefix + '; ' + error.message, varDefNode, undefined, undefined, undefined, error.originalError));
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});
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}
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return coercedValues;
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}
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/**
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* Prepares an object map of argument values given a list of argument
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* definitions and list of argument AST nodes.
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*
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* Note: The returned value is a plain Object with a prototype, since it is
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* exposed to user code. Care should be taken to not pull values from the
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* Object prototype.
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*
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* @internal
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*/
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export function getArgumentValues(def, node, variableValues) {
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const coercedValues = {};
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/* istanbul ignore next (See https://github.com/graphql/graphql-js/issues/2203) */
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const argumentNodes = node.arguments ?? [];
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const argNodeMap = keyMap(argumentNodes, arg => arg.name.value);
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for (const argDef of def.args) {
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const name = argDef.name;
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const argType = argDef.type;
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const argumentNode = argNodeMap[name];
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if (!argumentNode) {
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if (argDef.defaultValue !== undefined) {
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coercedValues[name] = argDef.defaultValue;
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} else if (isNonNullType(argType)) {
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throw new GraphQLError(`Argument "${name}" of required type "${inspect(argType)}" ` + 'was not provided.', node);
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}
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continue;
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}
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const valueNode = argumentNode.value;
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let isNull = valueNode.kind === Kind.NULL;
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if (valueNode.kind === Kind.VARIABLE) {
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const variableName = valueNode.name.value;
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if (variableValues == null || !hasOwnProperty(variableValues, variableName)) {
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if (argDef.defaultValue !== undefined) {
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coercedValues[name] = argDef.defaultValue;
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} else if (isNonNullType(argType)) {
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throw new GraphQLError(`Argument "${name}" of required type "${inspect(argType)}" ` + `was provided the variable "$${variableName}" which was not provided a runtime value.`, valueNode);
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}
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continue;
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}
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isNull = variableValues[variableName] == null;
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}
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if (isNull && isNonNullType(argType)) {
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throw new GraphQLError(`Argument "${name}" of non-null type "${inspect(argType)}" ` + 'must not be null.', valueNode);
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}
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const coercedValue = valueFromAST(valueNode, argType, variableValues);
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if (coercedValue === undefined) {
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// Note: ValuesOfCorrectTypeRule validation should catch this before
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// execution. This is a runtime check to ensure execution does not
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// continue with an invalid argument value.
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throw new GraphQLError(`Argument "${name}" has invalid value ${print(valueNode)}.`, valueNode);
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}
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coercedValues[name] = coercedValue;
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}
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return coercedValues;
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}
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/**
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* Prepares an object map of argument values given a directive definition
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* and a AST node which may contain directives. Optionally also accepts a map
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* of variable values.
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*
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* If the directive does not exist on the node, returns undefined.
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*
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* Note: The returned value is a plain Object with a prototype, since it is
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* exposed to user code. Care should be taken to not pull values from the
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* Object prototype.
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*/
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export function getDirectiveValues(directiveDef, node, variableValues) {
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const directiveNode = node.directives && find(node.directives, directive => directive.name.value === directiveDef.name);
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if (directiveNode) {
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return getArgumentValues(directiveDef, directiveNode, variableValues);
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}
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}
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function hasOwnProperty(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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} |