| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const RequireEnsureDependenciesBlock = require("./RequireEnsureDependenciesBlock");
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| 9 | const RequireEnsureDependency = require("./RequireEnsureDependency");
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| 10 | const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
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| 11 | const getFunctionExpression = require("./getFunctionExpression");
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| 12 |
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| 13 | /** @typedef {import("../ChunkGroup").ChunkGroupOptions} ChunkGroupOptions */
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| 14 | /** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
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| 15 | /** @typedef {import("../javascript/BasicEvaluatedExpression")} BasicEvaluatedExpression */
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| 16 | /** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
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| 17 | /** @typedef {import("../javascript/JavascriptParser").Range} Range */
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| 18 |
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| 19 | module.exports = class RequireEnsureDependenciesBlockParserPlugin {
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| 20 | /**
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| 21 | * @param {JavascriptParser} parser the parser
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| 22 | * @returns {void}
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| 23 | */
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| 24 | apply(parser) {
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| 25 | parser.hooks.call
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| 26 | .for("require.ensure")
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| 27 | .tap("RequireEnsureDependenciesBlockParserPlugin", expr => {
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| 28 | let chunkName = null;
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| 29 | let errorExpressionArg = null;
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| 30 | let errorExpression = null;
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| 31 | switch (expr.arguments.length) {
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| 32 | case 4: {
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| 33 | const chunkNameExpr = parser.evaluateExpression(expr.arguments[3]);
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| 34 | if (!chunkNameExpr.isString()) return;
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| 35 | chunkName = chunkNameExpr.string;
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| 36 | }
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| 37 | // falls through
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| 38 | case 3: {
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| 39 | errorExpressionArg = expr.arguments[2];
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| 40 | errorExpression = getFunctionExpression(errorExpressionArg);
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| 41 |
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| 42 | if (!errorExpression && !chunkName) {
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| 43 | const chunkNameExpr = parser.evaluateExpression(
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| 44 | expr.arguments[2]
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| 45 | );
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| 46 | if (!chunkNameExpr.isString()) return;
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| 47 | chunkName = chunkNameExpr.string;
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| 48 | }
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| 49 | }
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| 50 | // falls through
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| 51 | case 2: {
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| 52 | const dependenciesExpr = parser.evaluateExpression(
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| 53 | expr.arguments[0]
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| 54 | );
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| 55 | const dependenciesItems =
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| 56 | /** @type {BasicEvaluatedExpression[]} */ (
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| 57 | dependenciesExpr.isArray()
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| 58 | ? dependenciesExpr.items
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| 59 | : [dependenciesExpr]
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| 60 | );
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| 61 | const successExpressionArg = expr.arguments[1];
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| 62 | const successExpression =
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| 63 | getFunctionExpression(successExpressionArg);
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| 64 |
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| 65 | if (successExpression) {
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| 66 | parser.walkExpressions(successExpression.expressions);
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| 67 | }
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| 68 | if (errorExpression) {
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| 69 | parser.walkExpressions(errorExpression.expressions);
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| 70 | }
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| 71 |
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| 72 | const depBlock = new RequireEnsureDependenciesBlock(
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| 73 | /** @type {ChunkGroupOptions & { entryOptions?: TODO }} */
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| 74 | (chunkName),
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| 75 | /** @type {DependencyLocation} */ (expr.loc)
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| 76 | );
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| 77 | const errorCallbackExists =
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| 78 | expr.arguments.length === 4 ||
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| 79 | (!chunkName && expr.arguments.length === 3);
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| 80 | const dep = new RequireEnsureDependency(
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| 81 | /** @type {Range} */ (expr.range),
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| 82 | /** @type {Range} */ (expr.arguments[1].range),
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| 83 | errorCallbackExists &&
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| 84 | /** @type {Range} */ (expr.arguments[2].range)
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| 85 | );
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| 86 | dep.loc = /** @type {DependencyLocation} */ (expr.loc);
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| 87 | depBlock.addDependency(dep);
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| 88 | const old = parser.state.current;
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| 89 | parser.state.current = /** @type {TODO} */ (depBlock);
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| 90 | try {
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| 91 | let failed = false;
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| 92 | parser.inScope([], () => {
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| 93 | for (const ee of dependenciesItems) {
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| 94 | if (ee.isString()) {
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| 95 | const ensureDependency = new RequireEnsureItemDependency(
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| 96 | /** @type {string} */ (ee.string)
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| 97 | );
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| 98 | ensureDependency.loc =
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| 99 | /** @type {DependencyLocation} */
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| 100 | (expr.loc);
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| 101 | depBlock.addDependency(ensureDependency);
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| 102 | } else {
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| 103 | failed = true;
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| 104 | }
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| 105 | }
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| 106 | });
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| 107 | if (failed) {
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| 108 | return;
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| 109 | }
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| 110 | if (successExpression) {
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| 111 | if (successExpression.fn.body.type === "BlockStatement") {
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| 112 | parser.walkStatement(successExpression.fn.body);
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| 113 | } else {
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| 114 | parser.walkExpression(successExpression.fn.body);
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| 115 | }
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| 116 | }
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| 117 | old.addBlock(depBlock);
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| 118 | } finally {
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| 119 | parser.state.current = old;
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| 120 | }
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| 121 | if (!successExpression) {
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| 122 | parser.walkExpression(successExpressionArg);
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| 123 | }
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| 124 | if (errorExpression) {
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| 125 | if (errorExpression.fn.body.type === "BlockStatement") {
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| 126 | parser.walkStatement(errorExpression.fn.body);
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| 127 | } else {
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| 128 | parser.walkExpression(errorExpression.fn.body);
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| 129 | }
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| 130 | } else if (errorExpressionArg) {
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| 131 | parser.walkExpression(errorExpressionArg);
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| 132 | }
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| 133 | return true;
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| 134 | }
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| 135 | }
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| 136 | });
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| 137 | }
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| 138 | };
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