1 | /**
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2 | * @license
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3 | * Copyright Google LLC All Rights Reserved.
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4 | *
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5 | * Use of this source code is governed by an MIT-style license that can be
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6 | * found in the LICENSE file at https://angular.io/license
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7 | */
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8 | (function (factory) {
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9 | if (typeof module === "object" && typeof module.exports === "object") {
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10 | var v = factory(require, exports);
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11 | if (v !== undefined) module.exports = v;
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12 | }
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13 | else if (typeof define === "function" && define.amd) {
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14 | define("@angular/compiler-cli/ngcc/src/host/umd_host", ["require", "exports", "tslib", "typescript", "@angular/compiler-cli/src/ngtsc/file_system", "@angular/compiler-cli/src/ngtsc/reflection", "@angular/compiler-cli/ngcc/src/utils", "@angular/compiler-cli/ngcc/src/host/commonjs_umd_utils", "@angular/compiler-cli/ngcc/src/host/esm2015_host", "@angular/compiler-cli/ngcc/src/host/esm5_host", "@angular/compiler-cli/ngcc/src/host/utils"], factory);
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15 | }
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16 | })(function (require, exports) {
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17 | "use strict";
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18 | Object.defineProperty(exports, "__esModule", { value: true });
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19 | exports.getImportsOfUmdModule = exports.parseStatementForUmdModule = exports.UmdReflectionHost = void 0;
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20 | var tslib_1 = require("tslib");
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21 | var ts = require("typescript");
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22 | var file_system_1 = require("@angular/compiler-cli/src/ngtsc/file_system");
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23 | var reflection_1 = require("@angular/compiler-cli/src/ngtsc/reflection");
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24 | var utils_1 = require("@angular/compiler-cli/ngcc/src/utils");
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25 | var commonjs_umd_utils_1 = require("@angular/compiler-cli/ngcc/src/host/commonjs_umd_utils");
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26 | var esm2015_host_1 = require("@angular/compiler-cli/ngcc/src/host/esm2015_host");
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27 | var esm5_host_1 = require("@angular/compiler-cli/ngcc/src/host/esm5_host");
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28 | var utils_2 = require("@angular/compiler-cli/ngcc/src/host/utils");
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29 | var UmdReflectionHost = /** @class */ (function (_super) {
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30 | tslib_1.__extends(UmdReflectionHost, _super);
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31 | function UmdReflectionHost(logger, isCore, src, dts) {
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32 | if (dts === void 0) { dts = null; }
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33 | var _this = _super.call(this, logger, isCore, src, dts) || this;
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34 | _this.umdModules = new utils_1.FactoryMap(function (sf) { return _this.computeUmdModule(sf); });
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35 | _this.umdExports = new utils_1.FactoryMap(function (sf) { return _this.computeExportsOfUmdModule(sf); });
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36 | _this.umdImportPaths = new utils_1.FactoryMap(function (param) { return _this.computeImportPath(param); });
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37 | _this.program = src.program;
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38 | _this.compilerHost = src.host;
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39 | return _this;
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40 | }
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41 | UmdReflectionHost.prototype.getImportOfIdentifier = function (id) {
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42 | // Is `id` a namespaced property access, e.g. `Directive` in `core.Directive`?
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43 | // If so capture the symbol of the namespace, e.g. `core`.
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44 | var nsIdentifier = commonjs_umd_utils_1.findNamespaceOfIdentifier(id);
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45 | var importParameter = nsIdentifier && this.findUmdImportParameter(nsIdentifier);
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46 | var from = importParameter && this.getUmdImportPath(importParameter);
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47 | return from !== null ? { from: from, name: id.text } : null;
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48 | };
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49 | UmdReflectionHost.prototype.getDeclarationOfIdentifier = function (id) {
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50 | // First we try one of the following:
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51 | // 1. The `exports` identifier - referring to the current file/module.
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52 | // 2. An identifier (e.g. `foo`) that refers to an imported UMD module.
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53 | // 3. A UMD style export identifier (e.g. the `foo` of `exports.foo`).
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54 | var declaration = this.getExportsDeclaration(id) || this.getUmdModuleDeclaration(id) ||
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55 | this.getUmdDeclaration(id);
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56 | if (declaration !== null) {
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57 | return declaration;
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58 | }
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59 | // Try to get the declaration using the super class.
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60 | var superDeclaration = _super.prototype.getDeclarationOfIdentifier.call(this, id);
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61 | if (superDeclaration === null) {
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62 | return null;
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63 | }
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64 | // Check to see if the declaration is the inner node of a declaration IIFE.
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65 | var outerNode = esm2015_host_1.getOuterNodeFromInnerDeclaration(superDeclaration.node);
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66 | if (outerNode === null) {
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67 | return superDeclaration;
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68 | }
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69 | // We are only interested if the outer declaration is of the form
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70 | // `exports.<name> = <initializer>`.
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71 | if (!commonjs_umd_utils_1.isExportsAssignment(outerNode)) {
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72 | return superDeclaration;
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73 | }
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74 | return {
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75 | kind: 1 /* Inline */,
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76 | node: outerNode.left,
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77 | implementation: outerNode.right,
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78 | known: null,
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79 | viaModule: null,
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80 | };
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81 | };
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82 | UmdReflectionHost.prototype.getExportsOfModule = function (module) {
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83 | return _super.prototype.getExportsOfModule.call(this, module) || this.umdExports.get(module.getSourceFile());
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84 | };
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85 | UmdReflectionHost.prototype.getUmdModule = function (sourceFile) {
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86 | if (sourceFile.isDeclarationFile) {
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87 | return null;
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88 | }
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89 | return this.umdModules.get(sourceFile);
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90 | };
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91 | UmdReflectionHost.prototype.getUmdImportPath = function (importParameter) {
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92 | return this.umdImportPaths.get(importParameter);
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93 | };
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94 | /**
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95 | * Get the top level statements for a module.
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96 | *
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97 | * In UMD modules these are the body of the UMD factory function.
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98 | *
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99 | * @param sourceFile The module whose statements we want.
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100 | * @returns An array of top level statements for the given module.
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101 | */
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102 | UmdReflectionHost.prototype.getModuleStatements = function (sourceFile) {
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103 | var umdModule = this.getUmdModule(sourceFile);
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104 | return umdModule !== null ? Array.from(umdModule.factoryFn.body.statements) : [];
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105 | };
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106 | UmdReflectionHost.prototype.getClassSymbolFromOuterDeclaration = function (declaration) {
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107 | var superSymbol = _super.prototype.getClassSymbolFromOuterDeclaration.call(this, declaration);
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108 | if (superSymbol) {
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109 | return superSymbol;
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110 | }
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111 | if (!commonjs_umd_utils_1.isExportsDeclaration(declaration)) {
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112 | return undefined;
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113 | }
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114 | var initializer = commonjs_umd_utils_1.skipAliases(declaration.parent.right);
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115 | if (ts.isIdentifier(initializer)) {
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116 | var implementation = this.getDeclarationOfIdentifier(initializer);
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117 | if (implementation !== null) {
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118 | var implementationSymbol = this.getClassSymbol(implementation.node);
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119 | if (implementationSymbol !== null) {
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120 | return implementationSymbol;
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121 | }
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122 | }
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123 | }
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124 | var innerDeclaration = esm2015_host_1.getInnerClassDeclaration(initializer);
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125 | if (innerDeclaration !== null) {
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126 | return this.createClassSymbol(declaration.name, innerDeclaration);
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127 | }
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128 | return undefined;
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129 | };
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130 | UmdReflectionHost.prototype.getClassSymbolFromInnerDeclaration = function (declaration) {
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131 | var superClassSymbol = _super.prototype.getClassSymbolFromInnerDeclaration.call(this, declaration);
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132 | if (superClassSymbol !== undefined) {
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133 | return superClassSymbol;
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134 | }
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135 | if (!reflection_1.isNamedFunctionDeclaration(declaration)) {
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136 | return undefined;
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137 | }
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138 | var outerNode = esm2015_host_1.getOuterNodeFromInnerDeclaration(declaration);
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139 | if (outerNode === null || !commonjs_umd_utils_1.isExportsAssignment(outerNode)) {
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140 | return undefined;
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141 | }
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142 | return this.createClassSymbol(outerNode.left.name, declaration);
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143 | };
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144 | /**
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145 | * Extract all "classes" from the `statement` and add them to the `classes` map.
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146 | */
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147 | UmdReflectionHost.prototype.addClassSymbolsFromStatement = function (classes, statement) {
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148 | _super.prototype.addClassSymbolsFromStatement.call(this, classes, statement);
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149 | // Also check for exports of the form: `exports.<name> = <class def>;`
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150 | if (commonjs_umd_utils_1.isExportsStatement(statement)) {
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151 | var classSymbol = this.getClassSymbol(statement.expression.left);
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152 | if (classSymbol) {
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153 | classes.set(classSymbol.implementation, classSymbol);
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154 | }
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155 | }
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156 | };
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157 | /**
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158 | * Analyze the given statement to see if it corresponds with an exports declaration like
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159 | * `exports.MyClass = MyClass_1 = <class def>;`. If so, the declaration of `MyClass_1`
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160 | * is associated with the `MyClass` identifier.
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161 | *
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162 | * @param statement The statement that needs to be preprocessed.
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163 | */
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164 | UmdReflectionHost.prototype.preprocessStatement = function (statement) {
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165 | _super.prototype.preprocessStatement.call(this, statement);
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166 | if (!commonjs_umd_utils_1.isExportsStatement(statement)) {
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167 | return;
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168 | }
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169 | var declaration = statement.expression.left;
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170 | var initializer = statement.expression.right;
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171 | if (!esm2015_host_1.isAssignment(initializer) || !ts.isIdentifier(initializer.left) ||
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172 | !this.isClass(declaration)) {
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173 | return;
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174 | }
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175 | var aliasedIdentifier = initializer.left;
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176 | var aliasedDeclaration = this.getDeclarationOfIdentifier(aliasedIdentifier);
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177 | if (aliasedDeclaration === null || aliasedDeclaration.node === null) {
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178 | throw new Error("Unable to locate declaration of " + aliasedIdentifier.text + " in \"" + statement.getText() + "\"");
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179 | }
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180 | this.aliasedClassDeclarations.set(aliasedDeclaration.node, declaration.name);
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181 | };
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182 | UmdReflectionHost.prototype.computeUmdModule = function (sourceFile) {
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183 | if (sourceFile.statements.length !== 1) {
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184 | throw new Error("Expected UMD module file (" + sourceFile.fileName + ") to contain exactly one statement, " +
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185 | ("but found " + sourceFile.statements.length + "."));
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186 | }
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187 | return parseStatementForUmdModule(sourceFile.statements[0]);
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188 | };
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189 | UmdReflectionHost.prototype.computeExportsOfUmdModule = function (sourceFile) {
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190 | var e_1, _a, e_2, _b;
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191 | var moduleMap = new Map();
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192 | try {
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193 | for (var _c = tslib_1.__values(this.getModuleStatements(sourceFile)), _d = _c.next(); !_d.done; _d = _c.next()) {
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194 | var statement = _d.value;
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195 | if (commonjs_umd_utils_1.isExportsStatement(statement)) {
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196 | var exportDeclaration = this.extractBasicUmdExportDeclaration(statement);
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197 | if (!moduleMap.has(exportDeclaration.name)) {
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198 | // We assume that the first `exports.<name>` is the actual declaration, and that any
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199 | // subsequent statements that match are decorating the original declaration.
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200 | // For example:
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201 | // ```
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202 | // exports.foo = <declaration>;
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203 | // exports.foo = __decorate(<decorator>, exports.foo);
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204 | // ```
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205 | // The declaration is the first line not the second.
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206 | moduleMap.set(exportDeclaration.name, exportDeclaration.declaration);
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207 | }
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208 | }
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209 | else if (commonjs_umd_utils_1.isWildcardReexportStatement(statement)) {
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210 | var reexports = this.extractUmdWildcardReexports(statement, sourceFile);
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211 | try {
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212 | for (var reexports_1 = (e_2 = void 0, tslib_1.__values(reexports)), reexports_1_1 = reexports_1.next(); !reexports_1_1.done; reexports_1_1 = reexports_1.next()) {
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213 | var reexport = reexports_1_1.value;
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214 | moduleMap.set(reexport.name, reexport.declaration);
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215 | }
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216 | }
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217 | catch (e_2_1) { e_2 = { error: e_2_1 }; }
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218 | finally {
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219 | try {
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220 | if (reexports_1_1 && !reexports_1_1.done && (_b = reexports_1.return)) _b.call(reexports_1);
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221 | }
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222 | finally { if (e_2) throw e_2.error; }
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223 | }
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224 | }
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225 | else if (commonjs_umd_utils_1.isDefinePropertyReexportStatement(statement)) {
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226 | var exportDeclaration = this.extractUmdDefinePropertyExportDeclaration(statement);
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227 | if (exportDeclaration !== null) {
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228 | moduleMap.set(exportDeclaration.name, exportDeclaration.declaration);
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229 | }
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230 | }
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231 | }
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232 | }
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233 | catch (e_1_1) { e_1 = { error: e_1_1 }; }
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234 | finally {
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235 | try {
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236 | if (_d && !_d.done && (_a = _c.return)) _a.call(_c);
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237 | }
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238 | finally { if (e_1) throw e_1.error; }
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239 | }
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240 | return moduleMap;
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241 | };
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242 | UmdReflectionHost.prototype.computeImportPath = function (param) {
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243 | var e_3, _a;
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244 | var umdModule = this.getUmdModule(param.getSourceFile());
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245 | if (umdModule === null) {
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246 | return null;
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247 | }
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248 | var imports = getImportsOfUmdModule(umdModule);
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249 | if (imports === null) {
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250 | return null;
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251 | }
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252 | var importPath = null;
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253 | try {
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254 | for (var imports_1 = tslib_1.__values(imports), imports_1_1 = imports_1.next(); !imports_1_1.done; imports_1_1 = imports_1.next()) {
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255 | var i = imports_1_1.value;
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256 | // Add all imports to the map to speed up future look ups.
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257 | this.umdImportPaths.set(i.parameter, i.path);
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258 | if (i.parameter === param) {
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259 | importPath = i.path;
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260 | }
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261 | }
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262 | }
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263 | catch (e_3_1) { e_3 = { error: e_3_1 }; }
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264 | finally {
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265 | try {
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266 | if (imports_1_1 && !imports_1_1.done && (_a = imports_1.return)) _a.call(imports_1);
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267 | }
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268 | finally { if (e_3) throw e_3.error; }
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269 | }
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270 | return importPath;
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271 | };
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272 | UmdReflectionHost.prototype.extractBasicUmdExportDeclaration = function (statement) {
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273 | var _a;
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274 | var name = statement.expression.left.name.text;
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275 | var exportExpression = commonjs_umd_utils_1.skipAliases(statement.expression.right);
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276 | var declaration = (_a = this.getDeclarationOfExpression(exportExpression)) !== null && _a !== void 0 ? _a : {
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277 | kind: 1 /* Inline */,
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278 | node: statement.expression.left,
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279 | implementation: statement.expression.right,
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280 | known: null,
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281 | viaModule: null,
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282 | };
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283 | return { name: name, declaration: declaration };
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284 | };
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285 | UmdReflectionHost.prototype.extractUmdWildcardReexports = function (statement, containingFile) {
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286 | var reexportArg = statement.expression.arguments[0];
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287 | var requireCall = commonjs_umd_utils_1.isRequireCall(reexportArg) ?
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288 | reexportArg :
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289 | ts.isIdentifier(reexportArg) ? commonjs_umd_utils_1.findRequireCallReference(reexportArg, this.checker) : null;
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290 | var importPath = null;
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291 | if (requireCall !== null) {
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292 | importPath = requireCall.arguments[0].text;
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293 | }
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294 | else if (ts.isIdentifier(reexportArg)) {
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295 | var importParameter = this.findUmdImportParameter(reexportArg);
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296 | importPath = importParameter && this.getUmdImportPath(importParameter);
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297 | }
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298 | if (importPath === null) {
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299 | return [];
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300 | }
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301 | var importedFile = this.resolveModuleName(importPath, containingFile);
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302 | if (importedFile === undefined) {
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303 | return [];
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304 | }
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305 | var importedExports = this.getExportsOfModule(importedFile);
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306 | if (importedExports === null) {
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307 | return [];
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308 | }
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309 | var viaModule = utils_1.stripExtension(importedFile.fileName);
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310 | var reexports = [];
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311 | importedExports.forEach(function (decl, name) { return reexports.push({ name: name, declaration: tslib_1.__assign(tslib_1.__assign({}, decl), { viaModule: viaModule }) }); });
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312 | return reexports;
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313 | };
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314 | UmdReflectionHost.prototype.extractUmdDefinePropertyExportDeclaration = function (statement) {
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315 | var args = statement.expression.arguments;
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316 | var name = args[1].text;
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317 | var getterFnExpression = commonjs_umd_utils_1.extractGetterFnExpression(statement);
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318 | if (getterFnExpression === null) {
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319 | return null;
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320 | }
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321 | var declaration = this.getDeclarationOfExpression(getterFnExpression);
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322 | if (declaration !== null) {
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323 | return { name: name, declaration: declaration };
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324 | }
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325 | return {
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326 | name: name,
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327 | declaration: {
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328 | kind: 1 /* Inline */,
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329 | node: args[1],
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330 | implementation: getterFnExpression,
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331 | known: null,
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332 | viaModule: null,
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333 | },
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334 | };
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335 | };
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336 | /**
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337 | * Is the identifier a parameter on a UMD factory function, e.g. `function factory(this, core)`?
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338 | * If so then return its declaration.
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339 | */
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340 | UmdReflectionHost.prototype.findUmdImportParameter = function (id) {
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341 | var symbol = id && this.checker.getSymbolAtLocation(id) || null;
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342 | var declaration = symbol && symbol.valueDeclaration;
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343 | return declaration && ts.isParameter(declaration) ? declaration : null;
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344 | };
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345 | UmdReflectionHost.prototype.getUmdDeclaration = function (id) {
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346 | var nsIdentifier = commonjs_umd_utils_1.findNamespaceOfIdentifier(id);
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347 | if (nsIdentifier === null) {
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348 | return null;
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349 | }
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350 | if (nsIdentifier.parent.parent && commonjs_umd_utils_1.isExportsAssignment(nsIdentifier.parent.parent)) {
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351 | var initializer = nsIdentifier.parent.parent.right;
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352 | if (ts.isIdentifier(initializer)) {
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353 | return this.getDeclarationOfIdentifier(initializer);
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354 | }
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355 | return this.detectKnownDeclaration({
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356 | kind: 1 /* Inline */,
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357 | node: nsIdentifier.parent.parent.left,
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358 | implementation: commonjs_umd_utils_1.skipAliases(nsIdentifier.parent.parent.right),
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359 | viaModule: null,
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360 | known: null,
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361 | });
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362 | }
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363 | var moduleDeclaration = this.getUmdModuleDeclaration(nsIdentifier);
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364 | if (moduleDeclaration === null || moduleDeclaration.node === null ||
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365 | !ts.isSourceFile(moduleDeclaration.node)) {
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366 | return null;
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367 | }
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368 | var moduleExports = this.getExportsOfModule(moduleDeclaration.node);
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369 | if (moduleExports === null) {
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370 | return null;
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371 | }
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372 | // We need to compute the `viaModule` because the `getExportsOfModule()` call
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373 | // did not know that we were importing the declaration.
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374 | var declaration = moduleExports.get(id.text);
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375 | if (!moduleExports.has(id.text)) {
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376 | return null;
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377 | }
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378 | // We need to compute the `viaModule` because the `getExportsOfModule()` call
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379 | // did not know that we were importing the declaration.
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380 | var viaModule = declaration.viaModule === null ? moduleDeclaration.viaModule : declaration.viaModule;
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381 | return tslib_1.__assign(tslib_1.__assign({}, declaration), { viaModule: viaModule, known: utils_1.getTsHelperFnFromIdentifier(id) });
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382 | };
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383 | UmdReflectionHost.prototype.getExportsDeclaration = function (id) {
|
---|
384 | if (!isExportsIdentifier(id)) {
|
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385 | return null;
|
---|
386 | }
|
---|
387 | // Sadly, in the case of `exports.foo = bar`, we can't use `this.findUmdImportParameter(id)`
|
---|
388 | // to check whether this `exports` is from the IIFE body arguments, because
|
---|
389 | // `this.checker.getSymbolAtLocation(id)` will return the symbol for the `foo` identifier
|
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390 | // rather than the `exports` identifier.
|
---|
391 | //
|
---|
392 | // Instead we search the symbols in the current local scope.
|
---|
393 | var exportsSymbol = this.checker.getSymbolsInScope(id, ts.SymbolFlags.Variable)
|
---|
394 | .find(function (symbol) { return symbol.name === 'exports'; });
|
---|
395 | var node = (exportsSymbol === null || exportsSymbol === void 0 ? void 0 : exportsSymbol.valueDeclaration) !== undefined &&
|
---|
396 | !ts.isFunctionExpression(exportsSymbol.valueDeclaration.parent) ?
|
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397 | // There is a locally defined `exports` variable that is not a function parameter.
|
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398 | // So this `exports` identifier must be a local variable and does not represent the module.
|
---|
399 | exportsSymbol.valueDeclaration :
|
---|
400 | // There is no local symbol or it is a parameter of an IIFE.
|
---|
401 | // So this `exports` represents the current "module".
|
---|
402 | id.getSourceFile();
|
---|
403 | return {
|
---|
404 | kind: 0 /* Concrete */,
|
---|
405 | node: node,
|
---|
406 | viaModule: null,
|
---|
407 | known: null,
|
---|
408 | identity: null,
|
---|
409 | };
|
---|
410 | };
|
---|
411 | UmdReflectionHost.prototype.getUmdModuleDeclaration = function (id) {
|
---|
412 | var importPath = this.getImportPathFromParameter(id) || this.getImportPathFromRequireCall(id);
|
---|
413 | if (importPath === null) {
|
---|
414 | return null;
|
---|
415 | }
|
---|
416 | var module = this.resolveModuleName(importPath, id.getSourceFile());
|
---|
417 | if (module === undefined) {
|
---|
418 | return null;
|
---|
419 | }
|
---|
420 | var viaModule = commonjs_umd_utils_1.isExternalImport(importPath) ? importPath : null;
|
---|
421 | return { kind: 0 /* Concrete */, node: module, viaModule: viaModule, known: null, identity: null };
|
---|
422 | };
|
---|
423 | UmdReflectionHost.prototype.getImportPathFromParameter = function (id) {
|
---|
424 | var importParameter = this.findUmdImportParameter(id);
|
---|
425 | if (importParameter === null) {
|
---|
426 | return null;
|
---|
427 | }
|
---|
428 | return this.getUmdImportPath(importParameter);
|
---|
429 | };
|
---|
430 | UmdReflectionHost.prototype.getImportPathFromRequireCall = function (id) {
|
---|
431 | var requireCall = commonjs_umd_utils_1.findRequireCallReference(id, this.checker);
|
---|
432 | if (requireCall === null) {
|
---|
433 | return null;
|
---|
434 | }
|
---|
435 | return requireCall.arguments[0].text;
|
---|
436 | };
|
---|
437 | /**
|
---|
438 | * If this is an IIFE then try to grab the outer and inner classes otherwise fallback on the super
|
---|
439 | * class.
|
---|
440 | */
|
---|
441 | UmdReflectionHost.prototype.getDeclarationOfExpression = function (expression) {
|
---|
442 | var inner = esm2015_host_1.getInnerClassDeclaration(expression);
|
---|
443 | if (inner !== null) {
|
---|
444 | var outer = esm2015_host_1.getOuterNodeFromInnerDeclaration(inner);
|
---|
445 | if (outer !== null && commonjs_umd_utils_1.isExportsAssignment(outer)) {
|
---|
446 | return {
|
---|
447 | kind: 1 /* Inline */,
|
---|
448 | node: outer.left,
|
---|
449 | implementation: inner,
|
---|
450 | known: null,
|
---|
451 | viaModule: null,
|
---|
452 | };
|
---|
453 | }
|
---|
454 | }
|
---|
455 | return _super.prototype.getDeclarationOfExpression.call(this, expression);
|
---|
456 | };
|
---|
457 | UmdReflectionHost.prototype.resolveModuleName = function (moduleName, containingFile) {
|
---|
458 | if (this.compilerHost.resolveModuleNames) {
|
---|
459 | var moduleInfo = this.compilerHost.resolveModuleNames([moduleName], containingFile.fileName, undefined, undefined, this.program.getCompilerOptions())[0];
|
---|
460 | return moduleInfo && this.program.getSourceFile(file_system_1.absoluteFrom(moduleInfo.resolvedFileName));
|
---|
461 | }
|
---|
462 | else {
|
---|
463 | var moduleInfo = ts.resolveModuleName(moduleName, containingFile.fileName, this.program.getCompilerOptions(), this.compilerHost);
|
---|
464 | return moduleInfo.resolvedModule &&
|
---|
465 | this.program.getSourceFile(file_system_1.absoluteFrom(moduleInfo.resolvedModule.resolvedFileName));
|
---|
466 | }
|
---|
467 | };
|
---|
468 | return UmdReflectionHost;
|
---|
469 | }(esm5_host_1.Esm5ReflectionHost));
|
---|
470 | exports.UmdReflectionHost = UmdReflectionHost;
|
---|
471 | function parseStatementForUmdModule(statement) {
|
---|
472 | var wrapperCall = getUmdWrapperCall(statement);
|
---|
473 | if (!wrapperCall)
|
---|
474 | return null;
|
---|
475 | var wrapperFn = wrapperCall.expression;
|
---|
476 | if (!ts.isFunctionExpression(wrapperFn))
|
---|
477 | return null;
|
---|
478 | var factoryFnParamIndex = wrapperFn.parameters.findIndex(function (parameter) { return ts.isIdentifier(parameter.name) && parameter.name.text === 'factory'; });
|
---|
479 | if (factoryFnParamIndex === -1)
|
---|
480 | return null;
|
---|
481 | var factoryFn = utils_2.stripParentheses(wrapperCall.arguments[factoryFnParamIndex]);
|
---|
482 | if (!factoryFn || !ts.isFunctionExpression(factoryFn))
|
---|
483 | return null;
|
---|
484 | return { wrapperFn: wrapperFn, factoryFn: factoryFn };
|
---|
485 | }
|
---|
486 | exports.parseStatementForUmdModule = parseStatementForUmdModule;
|
---|
487 | function getUmdWrapperCall(statement) {
|
---|
488 | if (!ts.isExpressionStatement(statement) || !ts.isParenthesizedExpression(statement.expression) ||
|
---|
489 | !ts.isCallExpression(statement.expression.expression) ||
|
---|
490 | !ts.isFunctionExpression(statement.expression.expression.expression)) {
|
---|
491 | return null;
|
---|
492 | }
|
---|
493 | return statement.expression.expression;
|
---|
494 | }
|
---|
495 | function getImportsOfUmdModule(umdModule) {
|
---|
496 | var imports = [];
|
---|
497 | for (var i = 1; i < umdModule.factoryFn.parameters.length; i++) {
|
---|
498 | imports.push({
|
---|
499 | parameter: umdModule.factoryFn.parameters[i],
|
---|
500 | path: getRequiredModulePath(umdModule.wrapperFn, i)
|
---|
501 | });
|
---|
502 | }
|
---|
503 | return imports;
|
---|
504 | }
|
---|
505 | exports.getImportsOfUmdModule = getImportsOfUmdModule;
|
---|
506 | function getRequiredModulePath(wrapperFn, paramIndex) {
|
---|
507 | var statement = wrapperFn.body.statements[0];
|
---|
508 | if (!ts.isExpressionStatement(statement)) {
|
---|
509 | throw new Error('UMD wrapper body is not an expression statement:\n' + wrapperFn.body.getText());
|
---|
510 | }
|
---|
511 | var modulePaths = [];
|
---|
512 | findModulePaths(statement.expression);
|
---|
513 | // Since we were only interested in the `require()` calls, we miss the `exports` argument, so we
|
---|
514 | // need to subtract 1.
|
---|
515 | // E.g. `function(exports, dep1, dep2)` maps to `function(exports, require('path/to/dep1'),
|
---|
516 | // require('path/to/dep2'))`
|
---|
517 | return modulePaths[paramIndex - 1];
|
---|
518 | // Search the statement for calls to `require('...')` and extract the string value of the first
|
---|
519 | // argument
|
---|
520 | function findModulePaths(node) {
|
---|
521 | if (commonjs_umd_utils_1.isRequireCall(node)) {
|
---|
522 | var argument = node.arguments[0];
|
---|
523 | if (ts.isStringLiteral(argument)) {
|
---|
524 | modulePaths.push(argument.text);
|
---|
525 | }
|
---|
526 | }
|
---|
527 | else {
|
---|
528 | node.forEachChild(findModulePaths);
|
---|
529 | }
|
---|
530 | }
|
---|
531 | }
|
---|
532 | /**
|
---|
533 | * Is the `node` an identifier with the name "exports"?
|
---|
534 | */
|
---|
535 | function isExportsIdentifier(node) {
|
---|
536 | return ts.isIdentifier(node) && node.text === 'exports';
|
---|
537 | }
|
---|
538 | });
|
---|
539 | //# 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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 * as ts from 'typescript';\n\nimport {absoluteFrom} from '../../../src/ngtsc/file_system';\nimport {Logger} from '../../../src/ngtsc/logging';\nimport {Declaration, DeclarationKind, Import, isNamedFunctionDeclaration} from '../../../src/ngtsc/reflection';\nimport {BundleProgram} from '../packages/bundle_program';\nimport {FactoryMap, getTsHelperFnFromIdentifier, stripExtension} from '../utils';\n\nimport {DefinePropertyReexportStatement, ExportDeclaration, ExportsStatement, extractGetterFnExpression, findNamespaceOfIdentifier, findRequireCallReference, isDefinePropertyReexportStatement, isExportsAssignment, isExportsDeclaration, isExportsStatement, isExternalImport, isRequireCall, isWildcardReexportStatement, skipAliases, WildcardReexportStatement} from './commonjs_umd_utils';\nimport {getInnerClassDeclaration, getOuterNodeFromInnerDeclaration, isAssignment} from './esm2015_host';\nimport {Esm5ReflectionHost} from './esm5_host';\nimport {NgccClassSymbol} from './ngcc_host';\nimport {stripParentheses} from './utils';\n\nexport class UmdReflectionHost extends Esm5ReflectionHost {\n  protected umdModules =\n      new FactoryMap<ts.SourceFile, UmdModule|null>(sf => this.computeUmdModule(sf));\n  protected umdExports = new FactoryMap<ts.SourceFile, Map<string, Declaration>|null>(\n      sf => this.computeExportsOfUmdModule(sf));\n  protected umdImportPaths =\n      new FactoryMap<ts.ParameterDeclaration, string|null>(param => this.computeImportPath(param));\n  protected program: ts.Program;\n  protected compilerHost: ts.CompilerHost;\n\n  constructor(logger: Logger, isCore: boolean, src: BundleProgram, dts: BundleProgram|null = null) {\n    super(logger, isCore, src, dts);\n    this.program = src.program;\n    this.compilerHost = src.host;\n  }\n\n  override getImportOfIdentifier(id: ts.Identifier): Import|null {\n    // Is `id` a namespaced property access, e.g. `Directive` in `core.Directive`?\n    // If so capture the symbol of the namespace, e.g. `core`.\n    const nsIdentifier = findNamespaceOfIdentifier(id);\n    const importParameter = nsIdentifier && this.findUmdImportParameter(nsIdentifier);\n    const from = importParameter && this.getUmdImportPath(importParameter);\n    return from !== null ? {from, name: id.text} : null;\n  }\n\n  override getDeclarationOfIdentifier(id: ts.Identifier): Declaration|null {\n    // First we try one of the following:\n    // 1. The `exports` identifier - referring to the current file/module.\n    // 2. An identifier (e.g. `foo`) that refers to an imported UMD module.\n    // 3. A UMD style export identifier (e.g. the `foo` of `exports.foo`).\n    const declaration = this.getExportsDeclaration(id) || this.getUmdModuleDeclaration(id) ||\n        this.getUmdDeclaration(id);\n    if (declaration !== null) {\n      return declaration;\n    }\n\n    // Try to get the declaration using the super class.\n    const superDeclaration = super.getDeclarationOfIdentifier(id);\n    if (superDeclaration === null) {\n      return null;\n    }\n\n    // Check to see if the declaration is the inner node of a declaration IIFE.\n    const outerNode = getOuterNodeFromInnerDeclaration(superDeclaration.node);\n    if (outerNode === null) {\n      return superDeclaration;\n    }\n\n    // We are only interested if the outer declaration is of the form\n    // `exports.<name> = <initializer>`.\n    if (!isExportsAssignment(outerNode)) {\n      return superDeclaration;\n    }\n\n    return {\n      kind: DeclarationKind.Inline,\n      node: outerNode.left,\n      implementation: outerNode.right,\n      known: null,\n      viaModule: null,\n    };\n  }\n\n  override getExportsOfModule(module: ts.Node): Map<string, Declaration>|null {\n    return super.getExportsOfModule(module) || this.umdExports.get(module.getSourceFile());\n  }\n\n  getUmdModule(sourceFile: ts.SourceFile): UmdModule|null {\n    if (sourceFile.isDeclarationFile) {\n      return null;\n    }\n\n    return this.umdModules.get(sourceFile);\n  }\n\n  getUmdImportPath(importParameter: ts.ParameterDeclaration): string|null {\n    return this.umdImportPaths.get(importParameter);\n  }\n\n  /**\n   * Get the top level statements for a module.\n   *\n   * In UMD modules these are the body of the UMD factory function.\n   *\n   * @param sourceFile The module whose statements we want.\n   * @returns An array of top level statements for the given module.\n   */\n  protected override getModuleStatements(sourceFile: ts.SourceFile): ts.Statement[] {\n    const umdModule = this.getUmdModule(sourceFile);\n    return umdModule !== null ? Array.from(umdModule.factoryFn.body.statements) : [];\n  }\n\n  protected override getClassSymbolFromOuterDeclaration(declaration: ts.Node): NgccClassSymbol\n      |undefined {\n    const superSymbol = super.getClassSymbolFromOuterDeclaration(declaration);\n    if (superSymbol) {\n      return superSymbol;\n    }\n\n    if (!isExportsDeclaration(declaration)) {\n      return undefined;\n    }\n\n    let initializer = skipAliases(declaration.parent.right);\n\n    if (ts.isIdentifier(initializer)) {\n      const implementation = this.getDeclarationOfIdentifier(initializer);\n      if (implementation !== null) {\n        const implementationSymbol = this.getClassSymbol(implementation.node);\n        if (implementationSymbol !== null) {\n          return implementationSymbol;\n        }\n      }\n    }\n\n    const innerDeclaration = getInnerClassDeclaration(initializer);\n    if (innerDeclaration !== null) {\n      return this.createClassSymbol(declaration.name, innerDeclaration);\n    }\n\n    return undefined;\n  }\n\n\n  protected override getClassSymbolFromInnerDeclaration(declaration: ts.Node): NgccClassSymbol\n      |undefined {\n    const superClassSymbol = super.getClassSymbolFromInnerDeclaration(declaration);\n    if (superClassSymbol !== undefined) {\n      return superClassSymbol;\n    }\n\n    if (!isNamedFunctionDeclaration(declaration)) {\n      return undefined;\n    }\n\n    const outerNode = getOuterNodeFromInnerDeclaration(declaration);\n    if (outerNode === null || !isExportsAssignment(outerNode)) {\n      return undefined;\n    }\n\n    return this.createClassSymbol(outerNode.left.name, declaration);\n  }\n\n  /**\n   * Extract all \"classes\" from the `statement` and add them to the `classes` map.\n   */\n  protected override addClassSymbolsFromStatement(\n      classes: Map<ts.Symbol, NgccClassSymbol>, statement: ts.Statement): void {\n    super.addClassSymbolsFromStatement(classes, statement);\n\n    // Also check for exports of the form: `exports.<name> = <class def>;`\n    if (isExportsStatement(statement)) {\n      const classSymbol = this.getClassSymbol(statement.expression.left);\n      if (classSymbol) {\n        classes.set(classSymbol.implementation, classSymbol);\n      }\n    }\n  }\n\n  /**\n   * Analyze the given statement to see if it corresponds with an exports declaration like\n   * `exports.MyClass = MyClass_1 = <class def>;`. If so, the declaration of `MyClass_1`\n   * is associated with the `MyClass` identifier.\n   *\n   * @param statement The statement that needs to be preprocessed.\n   */\n  protected override preprocessStatement(statement: ts.Statement): void {\n    super.preprocessStatement(statement);\n\n    if (!isExportsStatement(statement)) {\n      return;\n    }\n\n    const declaration = statement.expression.left;\n    const initializer = statement.expression.right;\n    if (!isAssignment(initializer) || !ts.isIdentifier(initializer.left) ||\n        !this.isClass(declaration)) {\n      return;\n    }\n\n    const aliasedIdentifier = initializer.left;\n\n    const aliasedDeclaration = this.getDeclarationOfIdentifier(aliasedIdentifier);\n    if (aliasedDeclaration === null || aliasedDeclaration.node === null) {\n      throw new Error(\n          `Unable to locate declaration of ${aliasedIdentifier.text} in \"${statement.getText()}\"`);\n    }\n    this.aliasedClassDeclarations.set(aliasedDeclaration.node, declaration.name);\n  }\n\n  private computeUmdModule(sourceFile: ts.SourceFile): UmdModule|null {\n    if (sourceFile.statements.length !== 1) {\n      throw new Error(\n          `Expected UMD module file (${sourceFile.fileName}) to contain exactly one statement, ` +\n          `but found ${sourceFile.statements.length}.`);\n    }\n\n    return parseStatementForUmdModule(sourceFile.statements[0]);\n  }\n\n  private computeExportsOfUmdModule(sourceFile: ts.SourceFile): Map<string, Declaration>|null {\n    const moduleMap = new Map<string, Declaration>();\n    for (const statement of this.getModuleStatements(sourceFile)) {\n      if (isExportsStatement(statement)) {\n        const exportDeclaration = this.extractBasicUmdExportDeclaration(statement);\n        if (!moduleMap.has(exportDeclaration.name)) {\n          // We assume that the first `exports.<name>` is the actual declaration, and that any\n          // subsequent statements that match are decorating the original declaration.\n          // For example:\n          // ```\n          // exports.foo = <declaration>;\n          // exports.foo = __decorate(<decorator>, exports.foo);\n          // ```\n          // The declaration is the first line not the second.\n          moduleMap.set(exportDeclaration.name, exportDeclaration.declaration);\n        }\n      } else if (isWildcardReexportStatement(statement)) {\n        const reexports = this.extractUmdWildcardReexports(statement, sourceFile);\n        for (const reexport of reexports) {\n          moduleMap.set(reexport.name, reexport.declaration);\n        }\n      } else if (isDefinePropertyReexportStatement(statement)) {\n        const exportDeclaration = this.extractUmdDefinePropertyExportDeclaration(statement);\n        if (exportDeclaration !== null) {\n          moduleMap.set(exportDeclaration.name, exportDeclaration.declaration);\n        }\n      }\n    }\n    return moduleMap;\n  }\n\n  private computeImportPath(param: ts.ParameterDeclaration): string|null {\n    const umdModule = this.getUmdModule(param.getSourceFile());\n    if (umdModule === null) {\n      return null;\n    }\n\n    const imports = getImportsOfUmdModule(umdModule);\n    if (imports === null) {\n      return null;\n    }\n\n    let importPath: string|null = null;\n\n    for (const i of imports) {\n      // Add all imports to the map to speed up future look ups.\n      this.umdImportPaths.set(i.parameter, i.path);\n      if (i.parameter === param) {\n        importPath = i.path;\n      }\n    }\n\n    return importPath;\n  }\n\n  private extractBasicUmdExportDeclaration(statement: ExportsStatement): ExportDeclaration {\n    const name = statement.expression.left.name.text;\n    const exportExpression = skipAliases(statement.expression.right);\n    const declaration = this.getDeclarationOfExpression(exportExpression) ?? {\n      kind: DeclarationKind.Inline,\n      node: statement.expression.left,\n      implementation: statement.expression.right,\n      known: null,\n      viaModule: null,\n    };\n    return {name, declaration};\n  }\n\n  private extractUmdWildcardReexports(\n      statement: WildcardReexportStatement, containingFile: ts.SourceFile): ExportDeclaration[] {\n    const reexportArg = statement.expression.arguments[0];\n\n    const requireCall = isRequireCall(reexportArg) ?\n        reexportArg :\n        ts.isIdentifier(reexportArg) ? findRequireCallReference(reexportArg, this.checker) : null;\n\n    let importPath: string|null = null;\n\n    if (requireCall !== null) {\n      importPath = requireCall.arguments[0].text;\n    } else if (ts.isIdentifier(reexportArg)) {\n      const importParameter = this.findUmdImportParameter(reexportArg);\n      importPath = importParameter && this.getUmdImportPath(importParameter);\n    }\n\n    if (importPath === null) {\n      return [];\n    }\n\n    const importedFile = this.resolveModuleName(importPath, containingFile);\n    if (importedFile === undefined) {\n      return [];\n    }\n\n    const importedExports = this.getExportsOfModule(importedFile);\n    if (importedExports === null) {\n      return [];\n    }\n\n    const viaModule = stripExtension(importedFile.fileName);\n    const reexports: ExportDeclaration[] = [];\n    importedExports.forEach(\n        (decl, name) => reexports.push({name, declaration: {...decl, viaModule}}));\n    return reexports;\n  }\n\n  private extractUmdDefinePropertyExportDeclaration(statement: DefinePropertyReexportStatement):\n      ExportDeclaration|null {\n    const args = statement.expression.arguments;\n    const name = args[1].text;\n    const getterFnExpression = extractGetterFnExpression(statement);\n    if (getterFnExpression === null) {\n      return null;\n    }\n\n    const declaration = this.getDeclarationOfExpression(getterFnExpression);\n    if (declaration !== null) {\n      return {name, declaration};\n    }\n\n    return {\n      name,\n      declaration: {\n        kind: DeclarationKind.Inline,\n        node: args[1],\n        implementation: getterFnExpression,\n        known: null,\n        viaModule: null,\n      },\n    };\n  }\n\n  /**\n   * Is the identifier a parameter on a UMD factory function, e.g. `function factory(this, core)`?\n   * If so then return its declaration.\n   */\n  private findUmdImportParameter(id: ts.Identifier): ts.ParameterDeclaration|null {\n    const symbol = id && this.checker.getSymbolAtLocation(id) || null;\n    const declaration = symbol && symbol.valueDeclaration;\n    return declaration && ts.isParameter(declaration) ? declaration : null;\n  }\n\n  private getUmdDeclaration(id: ts.Identifier): Declaration|null {\n    const nsIdentifier = findNamespaceOfIdentifier(id);\n    if (nsIdentifier === null) {\n      return null;\n    }\n\n    if (nsIdentifier.parent.parent && isExportsAssignment(nsIdentifier.parent.parent)) {\n      const initializer = nsIdentifier.parent.parent.right;\n      if (ts.isIdentifier(initializer)) {\n        return this.getDeclarationOfIdentifier(initializer);\n      }\n      return this.detectKnownDeclaration({\n        kind: DeclarationKind.Inline,\n        node: nsIdentifier.parent.parent.left,\n        implementation: skipAliases(nsIdentifier.parent.parent.right),\n        viaModule: null,\n        known: null,\n      });\n    }\n\n    const moduleDeclaration = this.getUmdModuleDeclaration(nsIdentifier);\n    if (moduleDeclaration === null || moduleDeclaration.node === null ||\n        !ts.isSourceFile(moduleDeclaration.node)) {\n      return null;\n    }\n\n    const moduleExports = this.getExportsOfModule(moduleDeclaration.node);\n    if (moduleExports === null) {\n      return null;\n    }\n\n    // We need to compute the `viaModule` because  the `getExportsOfModule()` call\n    // did not know that we were importing the declaration.\n    const declaration = moduleExports.get(id.text)!;\n\n    if (!moduleExports.has(id.text)) {\n      return null;\n    }\n\n    // We need to compute the `viaModule` because  the `getExportsOfModule()` call\n    // did not know that we were importing the declaration.\n    const viaModule =\n        declaration.viaModule === null ? moduleDeclaration.viaModule : declaration.viaModule;\n\n    return {...declaration, viaModule, known: getTsHelperFnFromIdentifier(id)};\n  }\n\n  private getExportsDeclaration(id: ts.Identifier): Declaration|null {\n    if (!isExportsIdentifier(id)) {\n      return null;\n    }\n\n    // Sadly, in the case of `exports.foo = bar`, we can't use `this.findUmdImportParameter(id)`\n    // to check whether this `exports` is from the IIFE body arguments, because\n    // `this.checker.getSymbolAtLocation(id)` will return the symbol for the `foo` identifier\n    // rather than the `exports` identifier.\n    //\n    // Instead we search the symbols in the current local scope.\n    const exportsSymbol = this.checker.getSymbolsInScope(id, ts.SymbolFlags.Variable)\n                              .find(symbol => symbol.name === 'exports');\n\n    const node = exportsSymbol?.valueDeclaration !== undefined &&\n            !ts.isFunctionExpression(exportsSymbol.valueDeclaration.parent) ?\n        // There is a locally defined `exports` variable that is not a function parameter.\n        // So this `exports` identifier must be a local variable and does not represent the module.\n        exportsSymbol.valueDeclaration :\n        // There is no local symbol or it is a parameter of an IIFE.\n        // So this `exports` represents the current \"module\".\n        id.getSourceFile();\n\n    return {\n      kind: DeclarationKind.Concrete,\n      node,\n      viaModule: null,\n      known: null,\n      identity: null,\n    };\n  }\n\n  private getUmdModuleDeclaration(id: ts.Identifier): Declaration|null {\n    const importPath = this.getImportPathFromParameter(id) || this.getImportPathFromRequireCall(id);\n    if (importPath === null) {\n      return null;\n    }\n\n    const module = this.resolveModuleName(importPath, id.getSourceFile());\n    if (module === undefined) {\n      return null;\n    }\n\n    const viaModule = isExternalImport(importPath) ? importPath : null;\n    return {kind: DeclarationKind.Concrete, node: module, viaModule, known: null, identity: null};\n  }\n\n  private getImportPathFromParameter(id: ts.Identifier): string|null {\n    const importParameter = this.findUmdImportParameter(id);\n    if (importParameter === null) {\n      return null;\n    }\n    return this.getUmdImportPath(importParameter);\n  }\n\n  private getImportPathFromRequireCall(id: ts.Identifier): string|null {\n    const requireCall = findRequireCallReference(id, this.checker);\n    if (requireCall === null) {\n      return null;\n    }\n    return requireCall.arguments[0].text;\n  }\n\n  /**\n   * If this is an IIFE then try to grab the outer and inner classes otherwise fallback on the super\n   * class.\n   */\n  protected override getDeclarationOfExpression(expression: ts.Expression): Declaration|null {\n    const inner = getInnerClassDeclaration(expression);\n    if (inner !== null) {\n      const outer = getOuterNodeFromInnerDeclaration(inner);\n      if (outer !== null && isExportsAssignment(outer)) {\n        return {\n          kind: DeclarationKind.Inline,\n          node: outer.left,\n          implementation: inner,\n          known: null,\n          viaModule: null,\n        };\n      }\n    }\n    return super.getDeclarationOfExpression(expression);\n  }\n\n  private resolveModuleName(moduleName: string, containingFile: ts.SourceFile): ts.SourceFile\n      |undefined {\n    if (this.compilerHost.resolveModuleNames) {\n      const moduleInfo = this.compilerHost.resolveModuleNames(\n          [moduleName], containingFile.fileName, undefined, undefined,\n          this.program.getCompilerOptions())[0];\n      return moduleInfo && this.program.getSourceFile(absoluteFrom(moduleInfo.resolvedFileName));\n    } else {\n      const moduleInfo = ts.resolveModuleName(\n          moduleName, containingFile.fileName, this.program.getCompilerOptions(),\n          this.compilerHost);\n      return moduleInfo.resolvedModule &&\n          this.program.getSourceFile(absoluteFrom(moduleInfo.resolvedModule.resolvedFileName));\n    }\n  }\n}\n\nexport function parseStatementForUmdModule(statement: ts.Statement): UmdModule|null {\n  const wrapperCall = getUmdWrapperCall(statement);\n  if (!wrapperCall) return null;\n\n  const wrapperFn = wrapperCall.expression;\n  if (!ts.isFunctionExpression(wrapperFn)) return null;\n\n  const factoryFnParamIndex = wrapperFn.parameters.findIndex(\n      parameter => ts.isIdentifier(parameter.name) && parameter.name.text === 'factory');\n  if (factoryFnParamIndex === -1) return null;\n\n  const factoryFn = stripParentheses(wrapperCall.arguments[factoryFnParamIndex]);\n  if (!factoryFn || !ts.isFunctionExpression(factoryFn)) return null;\n\n  return {wrapperFn, factoryFn};\n}\n\nfunction getUmdWrapperCall(statement: ts.Statement): ts.CallExpression&\n    {expression: ts.FunctionExpression}|null {\n  if (!ts.isExpressionStatement(statement) || !ts.isParenthesizedExpression(statement.expression) ||\n      !ts.isCallExpression(statement.expression.expression) ||\n      !ts.isFunctionExpression(statement.expression.expression.expression)) {\n    return null;\n  }\n  return statement.expression.expression as ts.CallExpression & {expression: ts.FunctionExpression};\n}\n\n\nexport function getImportsOfUmdModule(umdModule: UmdModule):\n    {parameter: ts.ParameterDeclaration, path: string}[] {\n  const imports: {parameter: ts.ParameterDeclaration, path: string}[] = [];\n  for (let i = 1; i < umdModule.factoryFn.parameters.length; i++) {\n    imports.push({\n      parameter: umdModule.factoryFn.parameters[i],\n      path: getRequiredModulePath(umdModule.wrapperFn, i)\n    });\n  }\n  return imports;\n}\n\ninterface UmdModule {\n  wrapperFn: ts.FunctionExpression;\n  factoryFn: ts.FunctionExpression;\n}\n\nfunction getRequiredModulePath(wrapperFn: ts.FunctionExpression, paramIndex: number): string {\n  const statement = wrapperFn.body.statements[0];\n  if (!ts.isExpressionStatement(statement)) {\n    throw new Error(\n        'UMD wrapper body is not an expression statement:\\n' + wrapperFn.body.getText());\n  }\n  const modulePaths: string[] = [];\n  findModulePaths(statement.expression);\n\n  // Since we were only interested in the `require()` calls, we miss the `exports` argument, so we\n  // need to subtract 1.\n  // E.g. `function(exports, dep1, dep2)` maps to `function(exports, require('path/to/dep1'),\n  // require('path/to/dep2'))`\n  return modulePaths[paramIndex - 1];\n\n  // Search the statement for calls to `require('...')` and extract the string value of the first\n  // argument\n  function findModulePaths(node: ts.Node) {\n    if (isRequireCall(node)) {\n      const argument = node.arguments[0];\n      if (ts.isStringLiteral(argument)) {\n        modulePaths.push(argument.text);\n      }\n    } else {\n      node.forEachChild(findModulePaths);\n    }\n  }\n}\n\n/**\n * Is the `node` an identifier with the name \"exports\"?\n */\nfunction isExportsIdentifier(node: ts.Node): node is ts.Identifier {\n  return ts.isIdentifier(node) && node.text === 'exports';\n}\n"]} |
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