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/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
class OnChunksLoadedRuntimeModule extends RuntimeModule {
constructor() {
super("chunk loaded");
}
/**
* @returns {string} runtime code
*/
generate() {
const { compilation } = this;
const { runtimeTemplate } = compilation;
return Template.asString([
"var deferred = [];",
`${RuntimeGlobals.onChunksLoaded} = ${runtimeTemplate.basicFunction(
"result, chunkIds, fn, priority",
[
"if(chunkIds) {",
Template.indent([
"priority = priority || 0;",
"for(var i = deferred.length; i > 0 && deferred[i - 1][2] > priority; i--) deferred[i] = deferred[i - 1];",
"deferred[i] = [chunkIds, fn, priority];",
"return;"
]),
"}",
"var notFulfilled = Infinity;",
"for (var i = 0; i < deferred.length; i++) {",
Template.indent([
runtimeTemplate.destructureArray(
["chunkIds", "fn", "priority"],
"deferred[i]"
),
"var fulfilled = true;",
"for (var j = 0; j < chunkIds.length; j++) {",
Template.indent([
`if ((priority & 1 === 0 || notFulfilled >= priority) && Object.keys(${
RuntimeGlobals.onChunksLoaded
}).every(${runtimeTemplate.returningFunction(
`${RuntimeGlobals.onChunksLoaded}[key](chunkIds[j])`,
"key"
)})) {`,
Template.indent(["chunkIds.splice(j--, 1);"]),
"} else {",
Template.indent([
"fulfilled = false;",
"if(priority < notFulfilled) notFulfilled = priority;"
]),
"}"
]),
"}",
"if(fulfilled) {",
Template.indent([
"deferred.splice(i--, 1)",
"var r = fn();",
"if (r !== undefined) result = r;"
]),
"}"
]),
"}",
"return result;"
]
)};`
]);
}
}
module.exports = OnChunksLoadedRuntimeModule;