@angular/core
Version:
Angular - the core framework
148 lines • 23.1 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/core/schematics/migrations/module-with-providers/transform", ["require", "exports", "@angular/compiler-cli/src/ngtsc/imports", "@angular/compiler-cli/src/ngtsc/partial_evaluator", "@angular/compiler-cli/src/ngtsc/reflection", "typescript", "@angular/core/schematics/migrations/module-with-providers/util"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ModuleWithProvidersTransform = void 0;
const imports_1 = require("@angular/compiler-cli/src/ngtsc/imports");
const partial_evaluator_1 = require("@angular/compiler-cli/src/ngtsc/partial_evaluator");
const reflection_1 = require("@angular/compiler-cli/src/ngtsc/reflection");
const ts = require("typescript");
const util_1 = require("@angular/core/schematics/migrations/module-with-providers/util");
const TODO_COMMENT = 'TODO: The following node requires a generic type for `ModuleWithProviders`';
class ModuleWithProvidersTransform {
constructor(typeChecker, getUpdateRecorder) {
this.typeChecker = typeChecker;
this.getUpdateRecorder = getUpdateRecorder;
this.printer = ts.createPrinter();
this.partialEvaluator = new partial_evaluator_1.PartialEvaluator(new reflection_1.TypeScriptReflectionHost(this.typeChecker), this.typeChecker,
/* dependencyTracker */ null);
}
/** Migrates a given NgModule by walking through the referenced providers and static methods. */
migrateModule(module) {
return module.staticMethodsWithoutType.map(this._migrateStaticNgModuleMethod.bind(this))
.filter(v => v);
}
/** Migrates a ModuleWithProviders type definition that has no explicit generic type */
migrateType(type) {
const parent = type.parent;
let moduleText;
if ((ts.isFunctionDeclaration(parent) || ts.isMethodDeclaration(parent)) && parent.body) {
const returnStatement = parent.body.statements.find(ts.isReturnStatement);
// No return type found, exit
if (!returnStatement || !returnStatement.expression) {
return [{ node: parent, message: `Return type is not statically analyzable.` }];
}
moduleText = this._getNgModuleTypeOfExpression(returnStatement.expression);
}
else if (ts.isPropertyDeclaration(parent) || ts.isVariableDeclaration(parent)) {
if (!parent.initializer) {
addTodoToNode(type, TODO_COMMENT);
this._updateNode(type, type);
return [{ node: parent, message: `Unable to determine type for declaration.` }];
}
moduleText = this._getNgModuleTypeOfExpression(parent.initializer);
}
if (moduleText) {
this._addGenericToTypeReference(type, moduleText);
return [];
}
return [{ node: parent, message: `Type is not statically analyzable.` }];
}
/** Add a given generic to a type reference node */
_addGenericToTypeReference(node, typeName) {
const newGenericExpr = util_1.createModuleWithProvidersType(typeName, node);
this._updateNode(node, newGenericExpr);
}
/**
* Migrates a given static method if its ModuleWithProviders does not provide
* a generic type.
*/
_updateStaticMethodType(method, typeName) {
const newGenericExpr = util_1.createModuleWithProvidersType(typeName, method.type);
const newMethodDecl = ts.updateMethod(method, method.decorators, method.modifiers, method.asteriskToken, method.name, method.questionToken, method.typeParameters, method.parameters, newGenericExpr, method.body);
this._updateNode(method, newMethodDecl);
}
/** Whether the resolved value map represents a ModuleWithProviders object */
isModuleWithProvidersType(value) {
const ngModule = value.get('ngModule') !== undefined;
const providers = value.get('providers') !== undefined;
return ngModule && (value.size === 1 || (providers && value.size === 2));
}
/**
* Determine the generic type of a suspected ModuleWithProviders return type and add it
* explicitly
*/
_migrateStaticNgModuleMethod(node) {
const returnStatement = node.body &&
node.body.statements.find(n => ts.isReturnStatement(n));
// No return type found, exit
if (!returnStatement || !returnStatement.expression) {
return { node: node, message: `Return type is not statically analyzable.` };
}
const moduleText = this._getNgModuleTypeOfExpression(returnStatement.expression);
if (moduleText) {
this._updateStaticMethodType(node, moduleText);
return null;
}
return { node: node, message: `Method type is not statically analyzable.` };
}
/** Evaluate and return the ngModule type from an expression */
_getNgModuleTypeOfExpression(expr) {
const evaluatedExpr = this.partialEvaluator.evaluate(expr);
return this._getTypeOfResolvedValue(evaluatedExpr);
}
/**
* Visits a given object literal expression to determine the ngModule type. If the expression
* cannot be resolved, add a TODO to alert the user.
*/
_getTypeOfResolvedValue(value) {
if (value instanceof Map && this.isModuleWithProvidersType(value)) {
const mapValue = value.get('ngModule');
if (mapValue instanceof imports_1.Reference && ts.isClassDeclaration(mapValue.node) &&
mapValue.node.name) {
return mapValue.node.name.text;
}
else if (mapValue instanceof partial_evaluator_1.DynamicValue) {
addTodoToNode(mapValue.node, TODO_COMMENT);
this._updateNode(mapValue.node, mapValue.node);
}
}
return undefined;
}
_updateNode(node, newNode) {
const newText = this.printer.printNode(ts.EmitHint.Unspecified, newNode, node.getSourceFile());
const recorder = this.getUpdateRecorder(node.getSourceFile());
recorder.remove(node.getStart(), node.getWidth());
recorder.insertRight(node.getStart(), newText);
}
}
exports.ModuleWithProvidersTransform = ModuleWithProvidersTransform;
/**
* Adds a to-do to the given TypeScript node which alerts developers to fix
* potential issues identified by the migration.
*/
function addTodoToNode(node, text) {
ts.setSyntheticLeadingComments(node, [{
pos: -1,
end: -1,
hasTrailingNewLine: false,
kind: ts.SyntaxKind.MultiLineCommentTrivia,
text: ` ${text} `
}]);
}
});
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {UpdateRecorder} from '@angular-devkit/schematics';\nimport {Reference} from '@angular/compiler-cli/src/ngtsc/imports';\nimport {DynamicValue, PartialEvaluator, ResolvedValue, ResolvedValueMap} from '@angular/compiler-cli/src/ngtsc/partial_evaluator';\nimport {TypeScriptReflectionHost} from '@angular/compiler-cli/src/ngtsc/reflection';\nimport * as ts from 'typescript';\n\nimport {ResolvedNgModule} from './collector';\nimport {createModuleWithProvidersType} from './util';\n\nexport interface AnalysisFailure {\n  node: ts.Node;\n  message: string;\n}\n\nconst TODO_COMMENT = 'TODO: The following node requires a generic type for `ModuleWithProviders`';\n\nexport class ModuleWithProvidersTransform {\n  private printer = ts.createPrinter();\n  private partialEvaluator: PartialEvaluator = new PartialEvaluator(\n      new TypeScriptReflectionHost(this.typeChecker), this.typeChecker,\n      /* dependencyTracker */ null);\n\n  constructor(\n      private typeChecker: ts.TypeChecker,\n      private getUpdateRecorder: (sf: ts.SourceFile) => UpdateRecorder) {}\n\n  /** Migrates a given NgModule by walking through the referenced providers and static methods. */\n  migrateModule(module: ResolvedNgModule): AnalysisFailure[] {\n    return module.staticMethodsWithoutType.map(this._migrateStaticNgModuleMethod.bind(this))\n               .filter(v => v) as AnalysisFailure[];\n  }\n\n  /** Migrates a ModuleWithProviders type definition that has no explicit generic type */\n  migrateType(type: ts.TypeReferenceNode): AnalysisFailure[] {\n    const parent = type.parent;\n    let moduleText: string|undefined;\n    if ((ts.isFunctionDeclaration(parent) || ts.isMethodDeclaration(parent)) && parent.body) {\n      const returnStatement = parent.body.statements.find(ts.isReturnStatement);\n\n      // No return type found, exit\n      if (!returnStatement || !returnStatement.expression) {\n        return [{node: parent, message: `Return type is not statically analyzable.`}];\n      }\n\n      moduleText = this._getNgModuleTypeOfExpression(returnStatement.expression);\n    } else if (ts.isPropertyDeclaration(parent) || ts.isVariableDeclaration(parent)) {\n      if (!parent.initializer) {\n        addTodoToNode(type, TODO_COMMENT);\n        this._updateNode(type, type);\n        return [{node: parent, message: `Unable to determine type for declaration.`}];\n      }\n\n      moduleText = this._getNgModuleTypeOfExpression(parent.initializer);\n    }\n\n    if (moduleText) {\n      this._addGenericToTypeReference(type, moduleText);\n      return [];\n    }\n\n    return [{node: parent, message: `Type is not statically analyzable.`}];\n  }\n\n  /** Add a given generic to a type reference node */\n  private _addGenericToTypeReference(node: ts.TypeReferenceNode, typeName: string) {\n    const newGenericExpr = createModuleWithProvidersType(typeName, node);\n    this._updateNode(node, newGenericExpr);\n  }\n\n  /**\n   * Migrates a given static method if its ModuleWithProviders does not provide\n   * a generic type.\n   */\n  private _updateStaticMethodType(method: ts.MethodDeclaration, typeName: string) {\n    const newGenericExpr =\n        createModuleWithProvidersType(typeName, method.type as ts.TypeReferenceNode);\n    const newMethodDecl = ts.updateMethod(\n        method, method.decorators, method.modifiers, method.asteriskToken, method.name,\n        method.questionToken, method.typeParameters, method.parameters, newGenericExpr,\n        method.body);\n\n    this._updateNode(method, newMethodDecl);\n  }\n\n  /** Whether the resolved value map represents a ModuleWithProviders object */\n  isModuleWithProvidersType(value: ResolvedValueMap): boolean {\n    const ngModule = value.get('ngModule') !== undefined;\n    const providers = value.get('providers') !== undefined;\n\n    return ngModule && (value.size === 1 || (providers && value.size === 2));\n  }\n\n  /**\n   * Determine the generic type of a suspected ModuleWithProviders return type and add it\n   * explicitly\n   */\n  private _migrateStaticNgModuleMethod(node: ts.MethodDeclaration): AnalysisFailure|null {\n    const returnStatement = node.body &&\n        node.body.statements.find(n => ts.isReturnStatement(n)) as ts.ReturnStatement | undefined;\n\n    // No return type found, exit\n    if (!returnStatement || !returnStatement.expression) {\n      return {node: node, message: `Return type is not statically analyzable.`};\n    }\n\n    const moduleText = this._getNgModuleTypeOfExpression(returnStatement.expression);\n\n    if (moduleText) {\n      this._updateStaticMethodType(node, moduleText);\n      return null;\n    }\n\n    return {node: node, message: `Method type is not statically analyzable.`};\n  }\n\n  /** Evaluate and return the ngModule type from an expression */\n  private _getNgModuleTypeOfExpression(expr: ts.Expression): string|undefined {\n    const evaluatedExpr = this.partialEvaluator.evaluate(expr);\n    return this._getTypeOfResolvedValue(evaluatedExpr);\n  }\n\n  /**\n   * Visits a given object literal expression to determine the ngModule type. If the expression\n   * cannot be resolved, add a TODO to alert the user.\n   */\n  private _getTypeOfResolvedValue(value: ResolvedValue): string|undefined {\n    if (value instanceof Map && this.isModuleWithProvidersType(value)) {\n      const mapValue = value.get('ngModule')!;\n      if (mapValue instanceof Reference && ts.isClassDeclaration(mapValue.node) &&\n          mapValue.node.name) {\n        return mapValue.node.name.text;\n      } else if (mapValue instanceof DynamicValue) {\n        addTodoToNode(mapValue.node, TODO_COMMENT);\n        this._updateNode(mapValue.node, mapValue.node);\n      }\n    }\n\n    return undefined;\n  }\n\n  private _updateNode(node: ts.Node, newNode: ts.Node) {\n    const newText = this.printer.printNode(ts.EmitHint.Unspecified, newNode, node.getSourceFile());\n    const recorder = this.getUpdateRecorder(node.getSourceFile());\n\n    recorder.remove(node.getStart(), node.getWidth());\n    recorder.insertRight(node.getStart(), newText);\n  }\n}\n\n/**\n * Adds a to-do to the given TypeScript node which alerts developers to fix\n * potential issues identified by the migration.\n */\nfunction addTodoToNode(node: ts.Node, text: string) {\n  ts.setSyntheticLeadingComments(node, [{\n                                   pos: -1,\n                                   end: -1,\n                                   hasTrailingNewLine: false,\n                                   kind: ts.SyntaxKind.MultiLineCommentTrivia,\n                                   text: ` ${text} `\n                                 }]);\n}\n"]}