fix: Schema name conflict errors

Sources/ApolloCodegenLib/ApolloCodegen.swift

@@ -15,6 +15,7 @@ public class ApolloCodegen {
     case graphQLSourceValidationFailure(atLines: [String])
     case testMocksInvalidSwiftPackageConfiguration
     case inputSearchPathInvalid(path: String)
+    case schemaNameConflict(name: String)
 
     public var errorDescription: String? {
       switch self {
@@ -24,6 +25,8 @@ public class ApolloCodegen {
         return "Schema Types must be generated with module type 'swiftPackageManager' to generate a swift package for test mocks."
       case let .inputSearchPathInvalid(path):
         return "Input search path '\(path)' is invalid. Input search paths must include a file extension component. (eg. '.graphql')"
+      case let .schemaNameConflict(name):
+        return "Schema name \(name) conflicts with name of a type in your GraphQL schema. Please choose a different schema name. Suggestions: \(name)Schema, \(name)GraphQL, \(name)API"
       }
     }
   }
@@ -47,16 +50,18 @@ public class ApolloCodegen {
     rootURL: URL? = nil,
     fileManager: ApolloFileManager = .default
   ) throws {
+
     let configContext = ConfigurationContext(
       config: configuration,
       rootURL: rootURL
     )
+
     let compilationResult = try compileGraphQLResult(
       configContext,
       experimentalFeatures: configuration.experimentalFeatures
     )
 
-    try validate(config: configContext)
+    try validate(config: configContext, compilationResult: compilationResult)
 
     let ir = IR(
       schemaName: configContext.schemaName,
@@ -107,7 +112,7 @@ public class ApolloCodegen {
   }
 
   /// Performs validation against deterministic errors that will cause code generation to fail.
-  static func validate(config: ConfigurationContext) throws {
+  static func validate(config: ConfigurationContext, compilationResult: CompilationResult) throws {
     if case .swiftPackage = config.output.testMocks,
         config.output.schemaTypes.moduleType != .swiftPackageManager {
       throw Error.testMocksInvalidSwiftPackageConfiguration
@@ -119,6 +124,8 @@ public class ApolloCodegen {
     for searchPath in config.input.operationSearchPaths {
       try validate(inputSearchPath: searchPath)
     }
+
+    try validate(schemaName: config.schemaName, compilationResult: compilationResult)
   }
 
   static private func validate(inputSearchPath: String) throws {
@@ -127,6 +134,19 @@ public class ApolloCodegen {
     }
   }
 
+  static private func validate(schemaName: String, compilationResult: CompilationResult) throws {
+    guard
+      !compilationResult.referencedTypes.contains(where: { namedType in
+        namedType.swiftName == schemaName.firstUppercased
+      }),
+      !compilationResult.fragments.contains(where: { fragmentDefinition in
+        fragmentDefinition.name == schemaName.firstUppercased
+      })
+    else {
+      throw Error.schemaNameConflict(name: schemaName)
+    }
+  }
+
   /// Performs GraphQL source validation and compiles the schema and operation source documents.
   static func compileGraphQLResult(
     _ config: ConfigurationContext,
@@ -137,10 +157,12 @@ public class ApolloCodegen {
     let graphQLSchema = try createSchema(config, frontend)
     let operationsDocument = try createOperationsDocument(config, frontend, experimentalFeatures)
 
+    let validationOptions = ValidationOptions(config: config)
+
     let graphqlErrors = try frontend.validateDocument(
       schema: graphQLSchema,
       document: operationsDocument,
-      options: ValidationOptions(config: config.config)
+      validationOptions: validationOptions
     )
 
     guard graphqlErrors.isEmpty else {
@@ -152,7 +174,8 @@ public class ApolloCodegen {
     return try frontend.compile(
       schema: graphQLSchema,
       document: operationsDocument,
-      experimentalLegacySafelistingCompatibleOperations: experimentalFeatures.legacySafelistingCompatibleOperations
+      experimentalLegacySafelistingCompatibleOperations: experimentalFeatures.legacySafelistingCompatibleOperations,
+      validationOptions: validationOptions
     )
   }
 

Sources/ApolloCodegenLib/Frontend/GraphQLJSFrontend.swift

@@ -88,25 +88,29 @@ public final class GraphQLJSFrontend {
   public func validateDocument(
     schema: GraphQLSchema,
     document: GraphQLDocument,
-    options: ValidationOptions
+    validationOptions: ValidationOptions
   ) throws -> [GraphQLError] {
     return try library.call(
       "validateDocument",
       with: schema,
       document,
-      ValidationOptions.Bridged(from: options, bridge: self.bridge)
+      ValidationOptions.Bridged(from: validationOptions, bridge: self.bridge)
     )
   }
 
   /// Compiles a GraphQL document into an intermediate representation that is more suitable for analysis and code generation.
   public func compile(
     schema: GraphQLSchema,
     document: GraphQLDocument,
-    experimentalLegacySafelistingCompatibleOperations: Bool = false
+    experimentalLegacySafelistingCompatibleOperations: Bool = false,
+    validationOptions: ValidationOptions
   ) throws -> CompilationResult {
     return try library.call(
       "compileDocument",
-      with: schema, document, experimentalLegacySafelistingCompatibleOperations
+      with: schema,
+      document,
+      experimentalLegacySafelistingCompatibleOperations,
+      ValidationOptions.Bridged(from: validationOptions, bridge: self.bridge)
     )
   }
 }

Sources/ApolloCodegenLib/Frontend/JavaScript/src/__testUtils__/validationHelpers.ts

@@ -0,0 +1,8 @@
+import { ValidationOptions } from "../validationRules";
+
+export const emptyValidationOptions: ValidationOptions = {
+  disallowedScalarFieldNames: [],
+  disallowedEntityFieldNames: [],
+  disallowedEntityListFieldNames: [],
+  disallowedInputParameterNames: [],
+};

Sources/ApolloCodegenLib/Frontend/JavaScript/src/__tests__/deprecatedEnumCasesCompilationTests.ts

@@ -12,6 +12,7 @@ import {
   DocumentNode,
   GraphQLEnumType,
 } from "graphql";
+import { emptyValidationOptions } from "../__testUtils__/validationHelpers";
 
 describe("given schema", () => {
   const schemaSDL: string = `
@@ -49,7 +50,7 @@ describe("given schema", () => {
     );
 
     it("should compile enum values with deprecation reason", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const speciesEnum: GraphQLEnumType = compilationResult.referencedTypes.find(function(element) {
         return element.name == 'Species'
       }) as GraphQLEnumType

Sources/ApolloCodegenLib/Frontend/JavaScript/src/__tests__/inclusionConditionCompilationTests.ts

@@ -16,6 +16,7 @@ import {
   GraphQLSchema,
   DocumentNode
 } from "graphql";
+import { emptyValidationOptions } from "../__testUtils__/validationHelpers";
 
 describe("given schema", () => {
   const schemaSDL: string = `
@@ -48,7 +49,7 @@ describe("given schema", () => {
     );
 
     it("should compile inline fragment with inclusion condition", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const operation = compilationResult.operations[0];
       const allAnimals = operation.selectionSet.selections[0] as Field;
       const inlineFragment = allAnimals?.selectionSet?.selections?.[0] as InlineFragment;

Sources/ApolloCodegenLib/Frontend/JavaScript/src/__tests__/referenceTypesTests.ts

@@ -19,6 +19,7 @@ import {
 import {
   join
 } from 'path';
+import { emptyValidationOptions } from "../__testUtils__/validationHelpers";
 
 describe("mutation defined using ReportCarProblemInput", () => {
   const documentString: string = `
@@ -39,7 +40,7 @@ describe("mutation defined using ReportCarProblemInput", () => {
     const schema: GraphQLSchema = loadSchemaFromSources([new Source(schemaJSON, "TestSchema.json", { line: 1, column: 1 })]);
 
     it("should compile with referencedTypes including ReportCarProblemInput and CarProblem enum", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const reportCarProblemInput: GraphQLInputObjectType = compilationResult.referencedTypes.find(function(element) {
         return element.name == 'ReportCarProblemInput'
       }) as GraphQLInputObjectType
@@ -78,7 +79,7 @@ describe("mutation defined using ReportCarProblemInput", () => {
     const schema: GraphQLSchema = loadSchemaFromSources([new Source(schemaSDL, "Test Schema", { line: 1, column: 1 })]);
 
     it("should compile with referencedTypes inlcuding InputObject and enum", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const reportCarProblemInput: GraphQLInputObjectType = compilationResult.referencedTypes.find(function(element) {
         return element.name == 'ReportCarProblemInput'
       }) as GraphQLInputObjectType

Sources/ApolloCodegenLib/Frontend/JavaScript/src/__tests__/sourceDefinitionTransformTests.ts

@@ -12,6 +12,7 @@ import {
   GraphQLSchema,
   DocumentNode
 } from "graphql";
+import { emptyValidationOptions } from "../__testUtils__/validationHelpers";
 
 describe("given schema", () => {
   const schemaSDL: string = 
@@ -47,7 +48,7 @@ interface Pet {
     );
 
     describe("compile document", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
 
       it("operation definition should have source including __typename field.", () => {
         const operation = compilationResult.operations[0];
@@ -68,7 +69,7 @@ interface Pet {
     });
 
     describe("compile document for legacy compatible safelisting", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, true);
+      const compilationResult: CompilationResult = compileDocument(schema, document, true, emptyValidationOptions);
 
       it("operation definition should have source including __typename field in each selection set.", () => {
         const operation = compilationResult.operations[0];
@@ -109,7 +110,7 @@ interface Pet {
     );
 
     it("operation definition should have source including __typename field with no directives.", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const operation = compilationResult.operations[0];
 
       const expected: string = 
@@ -144,7 +145,7 @@ interface Pet {
     );
 
     it("operation definition should have source not including local cache mutation directive.", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const operation = compilationResult.operations[0];
 
       const expected: string = 
@@ -174,7 +175,7 @@ interface Pet {
     );
 
     it("fragment definition should have source including __typename field.", () => {
-      const compilationResult: CompilationResult = compileDocument(schema, document, false);
+      const compilationResult: CompilationResult = compileDocument(schema, document, false, emptyValidationOptions);
       const fragment = compilationResult.fragments[0];
 
       const expected: string = 

Sources/ApolloCodegenLib/Frontend/JavaScript/src/compiler/index.ts

@@ -31,11 +31,15 @@ import {
   SelectionSetNode,
   typeFromAST,
   isObjectType,
-  isInterfaceType
+  isInterfaceType,
+  isListType,
+  isNonNullType,
+  FieldNode,
 } from "graphql";
 import * as ir from "./ir";
 import { valueFromValueNode } from "./values";
 import { applyRequiredStatus } from "graphql/utilities/applyRequiredStatus";
+import { ValidationOptions } from "../validationRules";
 
 function filePathForNode(node: ASTNode): string | undefined {
   return node.loc?.source?.name;
@@ -51,7 +55,8 @@ export interface CompilationResult {
 export function compileToIR(
   schema: GraphQLSchema,
   document: DocumentNode,
-  legacySafelistingCompatibleOperations: boolean
+  legacySafelistingCompatibleOperations: boolean,
+  validationOptions: ValidationOptions
 ): CompilationResult {
   // Collect fragment definition nodes upfront so we can compile these as we encounter them.
   const fragmentNodeMap = new Map<String, FragmentDefinitionNode>();
@@ -292,6 +297,26 @@ export function compileToIR(
           directives: directives,
         };
 
+        function validateFieldName(node: FieldNode, disallowedNames?: Array<string>, schemaName?: string) {
+          if (disallowedNames && schemaName) {
+            const responseKey = (node.alias ?? node.name).value
+            const responseKeyFirstLowercase = responseKey.charAt(0).toLowerCase() + responseKey.slice(1)
+
+            if (disallowedNames?.includes(responseKeyFirstLowercase)) {
+              throw new GraphQLError(
+                `Schema name "${schemaName}" conflicts with name of a generated object API. Please choose a different schema name. Suggestions: "${schemaName}Schema", "${schemaName}GraphQL", "${schemaName}API"`,
+                { nodes: node }
+              );
+            }
+          }
+        }
+
+        if (isListType(fieldType) || (isNonNullType(fieldType) && isListType(fieldType.ofType))) {
+          validateFieldName(selectionNode, validationOptions.disallowedFieldNames?.entityList, validationOptions.schemaName)
+        } else if (isCompositeType(unwrappedFieldType)) {
+          validateFieldName(selectionNode, validationOptions.disallowedFieldNames?.entity, validationOptions.schemaName)
+        }
+
         if (isCompositeType(unwrappedFieldType)) {
           const selectionSetNode = selectionNode.selectionSet;
 

Sources/ApolloCodegenLib/Frontend/JavaScript/src/index.ts

@@ -92,15 +92,16 @@ export function mergeDocuments(documents: DocumentNode[]): DocumentNode {
 export function validateDocument(
   schema: GraphQLSchema,
   document: DocumentNode,
-  options: ValidationOptions,
+  validationOptions: ValidationOptions,
 ): readonly GraphQLError[] {
-  return validate(schema, document, defaultValidationRules(options));
+  return validate(schema, document, defaultValidationRules(validationOptions));
 }
 
 export function compileDocument(
   schema: GraphQLSchema,
   document: DocumentNode,
-  legacySafelistingCompatibleOperations: boolean
+  legacySafelistingCompatibleOperations: boolean,
+  validationOptions: ValidationOptions
 ): CompilationResult {
-  return compileToIR(schema, document, legacySafelistingCompatibleOperations);
+  return compileToIR(schema, document, legacySafelistingCompatibleOperations, validationOptions);
 }

Sources/ApolloCodegenLib/Frontend/JavaScript/src/validationRules.ts

@@ -11,13 +11,20 @@ import {
 
 const specifiedRulesToBeRemoved: [ValidationRule] = [NoUnusedFragmentsRule];
 
+export interface DisallowedFieldNames {
+  scalar?: Array<string>
+  entity?: Array<string>
+  entityList?: Array<string>
+}
+
 export interface ValidationOptions {
-  disallowedFieldNames?: Array<string>
+  schemaName?: string
+  disallowedFieldNames?: DisallowedFieldNames
   disallowedInputParameterNames?: Array<string>
 }
 
 export function defaultValidationRules(options: ValidationOptions): ValidationRule[] {
-  const disallowedFieldNamesRule = ApolloIOSDisallowedFieldNames(options.disallowedFieldNames)
+  const disallowedFieldNamesRule = ApolloIOSDisallowedFieldNames(options.disallowedFieldNames?.scalar)
   const disallowedInputParameterNamesRule = ApolloIOSDisallowedInputParameterNames(options.disallowedInputParameterNames)
   return [
     NoAnonymousQueries,