Initialisation

Added the packages and files for the backend server

node_modules/graphql/validation/ValidationContext.js

@@ -0,0 +1,232 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true,
+});
+exports.ValidationContext =
+  exports.SDLValidationContext =
+  exports.ASTValidationContext =
+    void 0;
+
+var _kinds = require('../language/kinds.js');
+
+var _visitor = require('../language/visitor.js');
+
+var _TypeInfo = require('../utilities/TypeInfo.js');
+
+/**
+ * An instance of this class is passed as the "this" context to all validators,
+ * allowing access to commonly useful contextual information from within a
+ * validation rule.
+ */
+class ASTValidationContext {
+  constructor(ast, onError) {
+    this._ast = ast;
+    this._fragments = undefined;
+    this._fragmentSpreads = new Map();
+    this._recursivelyReferencedFragments = new Map();
+    this._onError = onError;
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'ASTValidationContext';
+  }
+
+  reportError(error) {
+    this._onError(error);
+  }
+
+  getDocument() {
+    return this._ast;
+  }
+
+  getFragment(name) {
+    let fragments;
+
+    if (this._fragments) {
+      fragments = this._fragments;
+    } else {
+      fragments = Object.create(null);
+
+      for (const defNode of this.getDocument().definitions) {
+        if (defNode.kind === _kinds.Kind.FRAGMENT_DEFINITION) {
+          fragments[defNode.name.value] = defNode;
+        }
+      }
+
+      this._fragments = fragments;
+    }
+
+    return fragments[name];
+  }
+
+  getFragmentSpreads(node) {
+    let spreads = this._fragmentSpreads.get(node);
+
+    if (!spreads) {
+      spreads = [];
+      const setsToVisit = [node];
+      let set;
+
+      while ((set = setsToVisit.pop())) {
+        for (const selection of set.selections) {
+          if (selection.kind === _kinds.Kind.FRAGMENT_SPREAD) {
+            spreads.push(selection);
+          } else if (selection.selectionSet) {
+            setsToVisit.push(selection.selectionSet);
+          }
+        }
+      }
+
+      this._fragmentSpreads.set(node, spreads);
+    }
+
+    return spreads;
+  }
+
+  getRecursivelyReferencedFragments(operation) {
+    let fragments = this._recursivelyReferencedFragments.get(operation);
+
+    if (!fragments) {
+      fragments = [];
+      const collectedNames = Object.create(null);
+      const nodesToVisit = [operation.selectionSet];
+      let node;
+
+      while ((node = nodesToVisit.pop())) {
+        for (const spread of this.getFragmentSpreads(node)) {
+          const fragName = spread.name.value;
+
+          if (collectedNames[fragName] !== true) {
+            collectedNames[fragName] = true;
+            const fragment = this.getFragment(fragName);
+
+            if (fragment) {
+              fragments.push(fragment);
+              nodesToVisit.push(fragment.selectionSet);
+            }
+          }
+        }
+      }
+
+      this._recursivelyReferencedFragments.set(operation, fragments);
+    }
+
+    return fragments;
+  }
+}
+
+exports.ASTValidationContext = ASTValidationContext;
+
+class SDLValidationContext extends ASTValidationContext {
+  constructor(ast, schema, onError) {
+    super(ast, onError);
+    this._schema = schema;
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'SDLValidationContext';
+  }
+
+  getSchema() {
+    return this._schema;
+  }
+}
+
+exports.SDLValidationContext = SDLValidationContext;
+
+class ValidationContext extends ASTValidationContext {
+  constructor(schema, ast, typeInfo, onError) {
+    super(ast, onError);
+    this._schema = schema;
+    this._typeInfo = typeInfo;
+    this._variableUsages = new Map();
+    this._recursiveVariableUsages = new Map();
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'ValidationContext';
+  }
+
+  getSchema() {
+    return this._schema;
+  }
+
+  getVariableUsages(node) {
+    let usages = this._variableUsages.get(node);
+
+    if (!usages) {
+      const newUsages = [];
+      const typeInfo = new _TypeInfo.TypeInfo(this._schema);
+      (0, _visitor.visit)(
+        node,
+        (0, _TypeInfo.visitWithTypeInfo)(typeInfo, {
+          VariableDefinition: () => false,
+
+          Variable(variable) {
+            newUsages.push({
+              node: variable,
+              type: typeInfo.getInputType(),
+              defaultValue: typeInfo.getDefaultValue(),
+            });
+          },
+        }),
+      );
+      usages = newUsages;
+
+      this._variableUsages.set(node, usages);
+    }
+
+    return usages;
+  }
+
+  getRecursiveVariableUsages(operation) {
+    let usages = this._recursiveVariableUsages.get(operation);
+
+    if (!usages) {
+      usages = this.getVariableUsages(operation);
+
+      for (const frag of this.getRecursivelyReferencedFragments(operation)) {
+        usages = usages.concat(this.getVariableUsages(frag));
+      }
+
+      this._recursiveVariableUsages.set(operation, usages);
+    }
+
+    return usages;
+  }
+
+  getType() {
+    return this._typeInfo.getType();
+  }
+
+  getParentType() {
+    return this._typeInfo.getParentType();
+  }
+
+  getInputType() {
+    return this._typeInfo.getInputType();
+  }
+
+  getParentInputType() {
+    return this._typeInfo.getParentInputType();
+  }
+
+  getFieldDef() {
+    return this._typeInfo.getFieldDef();
+  }
+
+  getDirective() {
+    return this._typeInfo.getDirective();
+  }
+
+  getArgument() {
+    return this._typeInfo.getArgument();
+  }
+
+  getEnumValue() {
+    return this._typeInfo.getEnumValue();
+  }
+}
+
+exports.ValidationContext = ValidationContext;