/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const Template = require("../Template");
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const HelperRuntimeModule = require("./HelperRuntimeModule");
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class GetTrustedTypesPolicyRuntimeModule extends HelperRuntimeModule {
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/**
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* @param {ReadonlySet<string>} runtimeRequirements runtime requirements
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*/
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constructor(runtimeRequirements) {
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super("trusted types policy");
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this.runtimeRequirements = runtimeRequirements;
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}
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/**
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* @returns {string} runtime code
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*/
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generate() {
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const { compilation } = this;
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const { runtimeTemplate, outputOptions } = compilation;
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const { trustedTypes } = outputOptions;
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const fn = RuntimeGlobals.getTrustedTypesPolicy;
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const wrapPolicyCreationInTryCatch = trustedTypes
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? trustedTypes.onPolicyCreationFailure === "continue"
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: false;
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return Template.asString([
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"var policy;",
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`${fn} = ${runtimeTemplate.basicFunction("", [
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"// Create Trusted Type policy if Trusted Types are available and the policy doesn't exist yet.",
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"if (policy === undefined) {",
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Template.indent([
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"policy = {",
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Template.indent(
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[
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...(this.runtimeRequirements.has(RuntimeGlobals.createScript)
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? [
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`createScript: ${runtimeTemplate.returningFunction(
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"script",
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"script"
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)}`
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]
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: []),
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...(this.runtimeRequirements.has(RuntimeGlobals.createScriptUrl)
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? [
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`createScriptURL: ${runtimeTemplate.returningFunction(
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"url",
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"url"
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)}`
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]
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: [])
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].join(",\n")
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),
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"};",
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...(trustedTypes
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? [
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'if (typeof trustedTypes !== "undefined" && trustedTypes.createPolicy) {',
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Template.indent([
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...(wrapPolicyCreationInTryCatch ? ["try {"] : []),
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...[
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`policy = trustedTypes.createPolicy(${JSON.stringify(
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trustedTypes.policyName
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)}, policy);`
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].map(line =>
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wrapPolicyCreationInTryCatch ? Template.indent(line) : line
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),
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...(wrapPolicyCreationInTryCatch
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? [
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"} catch (e) {",
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Template.indent([
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`console.warn('Could not create trusted-types policy ${JSON.stringify(
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trustedTypes.policyName
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)}');`
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]),
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"}"
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]
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: [])
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]),
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"}"
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]
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: [])
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]),
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"}",
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"return policy;"
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])};`
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]);
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}
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}
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module.exports = GetTrustedTypesPolicyRuntimeModule;
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