angular-cn/packages/core/schematics/migrations/google3/noTemplateVariableAssignmen...

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/**
* @license
* Copyright Google Inc. 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
*/
import {RuleFailure, Rules} from 'tslint';
import * as ts from 'typescript';
import {NgComponentTemplateVisitor} from '../../utils/ng_component_template';
import {createHtmlSourceFile} from '../../utils/tslint/tslint_html_source_file';
import {analyzeResolvedTemplate} from '../template-var-assignment/analyze_template';
const FAILURE_MESSAGE = 'Found assignment to template variable. This does not work with Ivy and ' +
'needs to be updated.';
/**
* Rule that reports if an Angular template contains property assignments to template variables.
*/
export class Rule extends Rules.TypedRule {
applyWithProgram(sourceFile: ts.SourceFile, program: ts.Program): RuleFailure[] {
const typeChecker = program.getTypeChecker();
const templateVisitor = new NgComponentTemplateVisitor(typeChecker);
const failures: RuleFailure[] = [];
// Analyze the current source files by detecting all referenced HTML templates.
templateVisitor.visitNode(sourceFile);
const {resolvedTemplates} = templateVisitor;
// Analyze each resolved template and print a warning for property writes to
// template variables.
resolvedTemplates.forEach(template => {
const filePath = template.filePath;
const nodes = analyzeResolvedTemplate(template);
const templateFile =
template.inline ? sourceFile : createHtmlSourceFile(filePath, template.content);
if (!nodes) {
return;
}
nodes.forEach(n => {
failures.push(new RuleFailure(
templateFile, template.start + n.start, template.start + n.end, FAILURE_MESSAGE,
this.ruleName));
});
});
return failures;
}
}