50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
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import {RuleFailure} from 'tslint/lib/lint';
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import {AbstractRule} from 'tslint/lib/rules';
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import {RuleWalker} from 'tslint/lib/language/walker';
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import * as ts from 'typescript';
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export class Rule extends AbstractRule {
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public static FAILURE_STRING = "duplicate module import";
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public apply(sourceFile: ts.SourceFile): RuleFailure[] {
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const typedefWalker = new ModuleImportWalker(sourceFile, this.getOptions());
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return this.applyWithWalker(typedefWalker);
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}
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}
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class ModuleImportWalker extends RuleWalker {
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importModulesSeen: string[] = [];
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protected visitImportDeclaration(node: ts.ImportDeclaration): void {
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this.visitModuleSpecifier(node.moduleSpecifier);
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super.visitImportDeclaration(node);
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}
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protected visitImportEqualsDeclaration(node: ts.ImportEqualsDeclaration): void {
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this.visitModuleSpecifier(node.moduleReference);
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super.visitImportEqualsDeclaration(node);
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}
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private checkTypeAnnotation(location: number, typeAnnotation: ts.TypeNode, name?: ts.Node) {
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if (typeAnnotation == null) {
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let ns = "<name missing>";
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if (name != null && name.kind === ts.SyntaxKind.Identifier) {
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ns = (<ts.Identifier>name).text;
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}
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if (ns.charAt(0) === '_') return;
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let failure = this.createFailure(location, 1, "expected parameter " + ns + " to have a type");
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this.addFailure(failure);
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}
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}
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private visitModuleSpecifier(moduleSpecifier: ts.Node) {
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var text = moduleSpecifier.getText();
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if (this.importModulesSeen.indexOf(text) >= 0) {
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let failure =
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this.createFailure(moduleSpecifier.getEnd(), 1, "Duplicate imports from module " + text);
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this.addFailure(failure);
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}
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this.importModulesSeen.push(text);
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}
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}
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