Initialisation

Added the packages and files for the backend server

node_modules/graphql/execution/values.mjs

@@ -0,0 +1,263 @@
+import { inspect } from '../jsutils/inspect.mjs';
+import { keyMap } from '../jsutils/keyMap.mjs';
+import { printPathArray } from '../jsutils/printPathArray.mjs';
+import { GraphQLError } from '../error/GraphQLError.mjs';
+import { Kind } from '../language/kinds.mjs';
+import { print } from '../language/printer.mjs';
+import { isInputType, isNonNullType } from '../type/definition.mjs';
+import { coerceInputValue } from '../utilities/coerceInputValue.mjs';
+import { typeFromAST } from '../utilities/typeFromAST.mjs';
+import { valueFromAST } from '../utilities/valueFromAST.mjs';
+
+/**
+ * Prepares an object map of variableValues of the correct type based on the
+ * provided variable definitions and arbitrary input. If the input cannot be
+ * parsed to match the variable definitions, a GraphQLError will be thrown.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+export function getVariableValues(schema, varDefNodes, inputs, options) {
+  const errors = [];
+  const maxErrors =
+    options === null || options === void 0 ? void 0 : options.maxErrors;
+
+  try {
+    const coerced = coerceVariableValues(
+      schema,
+      varDefNodes,
+      inputs,
+      (error) => {
+        if (maxErrors != null && errors.length >= maxErrors) {
+          throw new GraphQLError(
+            'Too many errors processing variables, error limit reached. Execution aborted.',
+          );
+        }
+
+        errors.push(error);
+      },
+    );
+
+    if (errors.length === 0) {
+      return {
+        coerced,
+      };
+    }
+  } catch (error) {
+    errors.push(error);
+  }
+
+  return {
+    errors,
+  };
+}
+
+function coerceVariableValues(schema, varDefNodes, inputs, onError) {
+  const coercedValues = {};
+
+  for (const varDefNode of varDefNodes) {
+    const varName = varDefNode.variable.name.value;
+    const varType = typeFromAST(schema, varDefNode.type);
+
+    if (!isInputType(varType)) {
+      // Must use input types for variables. This should be caught during
+      // validation, however is checked again here for safety.
+      const varTypeStr = print(varDefNode.type);
+      onError(
+        new GraphQLError(
+          `Variable "$${varName}" expected value of type "${varTypeStr}" which cannot be used as an input type.`,
+          {
+            nodes: varDefNode.type,
+          },
+        ),
+      );
+      continue;
+    }
+
+    if (!hasOwnProperty(inputs, varName)) {
+      if (varDefNode.defaultValue) {
+        coercedValues[varName] = valueFromAST(varDefNode.defaultValue, varType);
+      } else if (isNonNullType(varType)) {
+        const varTypeStr = inspect(varType);
+        onError(
+          new GraphQLError(
+            `Variable "$${varName}" of required type "${varTypeStr}" was not provided.`,
+            {
+              nodes: varDefNode,
+            },
+          ),
+        );
+      }
+
+      continue;
+    }
+
+    const value = inputs[varName];
+
+    if (value === null && isNonNullType(varType)) {
+      const varTypeStr = inspect(varType);
+      onError(
+        new GraphQLError(
+          `Variable "$${varName}" of non-null type "${varTypeStr}" must not be null.`,
+          {
+            nodes: varDefNode,
+          },
+        ),
+      );
+      continue;
+    }
+
+    coercedValues[varName] = coerceInputValue(
+      value,
+      varType,
+      (path, invalidValue, error) => {
+        let prefix =
+          `Variable "$${varName}" got invalid value ` + inspect(invalidValue);
+
+        if (path.length > 0) {
+          prefix += ` at "${varName}${printPathArray(path)}"`;
+        }
+
+        onError(
+          new GraphQLError(prefix + '; ' + error.message, {
+            nodes: varDefNode,
+            originalError: error,
+          }),
+        );
+      },
+    );
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a list of argument
+ * definitions and list of argument AST nodes.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+export function getArgumentValues(def, node, variableValues) {
+  var _node$arguments;
+
+  const coercedValues = {}; // FIXME: https://github.com/graphql/graphql-js/issues/2203
+
+  /* c8 ignore next */
+
+  const argumentNodes =
+    (_node$arguments = node.arguments) !== null && _node$arguments !== void 0
+      ? _node$arguments
+      : [];
+  const argNodeMap = keyMap(argumentNodes, (arg) => arg.name.value);
+
+  for (const argDef of def.args) {
+    const name = argDef.name;
+    const argType = argDef.type;
+    const argumentNode = argNodeMap[name];
+
+    if (!argumentNode) {
+      if (argDef.defaultValue !== undefined) {
+        coercedValues[name] = argDef.defaultValue;
+      } else if (isNonNullType(argType)) {
+        throw new GraphQLError(
+          `Argument "${name}" of required type "${inspect(argType)}" ` +
+            'was not provided.',
+          {
+            nodes: node,
+          },
+        );
+      }
+
+      continue;
+    }
+
+    const valueNode = argumentNode.value;
+    let isNull = valueNode.kind === Kind.NULL;
+
+    if (valueNode.kind === Kind.VARIABLE) {
+      const variableName = valueNode.name.value;
+
+      if (
+        variableValues == null ||
+        !hasOwnProperty(variableValues, variableName)
+      ) {
+        if (argDef.defaultValue !== undefined) {
+          coercedValues[name] = argDef.defaultValue;
+        } else if (isNonNullType(argType)) {
+          throw new GraphQLError(
+            `Argument "${name}" of required type "${inspect(argType)}" ` +
+              `was provided the variable "$${variableName}" which was not provided a runtime value.`,
+            {
+              nodes: valueNode,
+            },
+          );
+        }
+
+        continue;
+      }
+
+      isNull = variableValues[variableName] == null;
+    }
+
+    if (isNull && isNonNullType(argType)) {
+      throw new GraphQLError(
+        `Argument "${name}" of non-null type "${inspect(argType)}" ` +
+          'must not be null.',
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    const coercedValue = valueFromAST(valueNode, argType, variableValues);
+
+    if (coercedValue === undefined) {
+      // Note: ValuesOfCorrectTypeRule validation should catch this before
+      // execution. This is a runtime check to ensure execution does not
+      // continue with an invalid argument value.
+      throw new GraphQLError(
+        `Argument "${name}" has invalid value ${print(valueNode)}.`,
+        {
+          nodes: valueNode,
+        },
+      );
+    }
+
+    coercedValues[name] = coercedValue;
+  }
+
+  return coercedValues;
+}
+/**
+ * Prepares an object map of argument values given a directive definition
+ * and a AST node which may contain directives. Optionally also accepts a map
+ * of variable values.
+ *
+ * If the directive does not exist on the node, returns undefined.
+ *
+ * Note: The returned value is a plain Object with a prototype, since it is
+ * exposed to user code. Care should be taken to not pull values from the
+ * Object prototype.
+ */
+
+export function getDirectiveValues(directiveDef, node, variableValues) {
+  var _node$directives;
+
+  const directiveNode =
+    (_node$directives = node.directives) === null || _node$directives === void 0
+      ? void 0
+      : _node$directives.find(
+          (directive) => directive.name.value === directiveDef.name,
+        );
+
+  if (directiveNode) {
+    return getArgumentValues(directiveDef, directiveNode, variableValues);
+  }
+}
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}