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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
class HarmonyModulesHelpers {
static getModuleVar(state, request) {
if(!state.harmonyModules) state.harmonyModules = [];
let idx = state.harmonyModules.indexOf(request);
if(idx < 0) {
idx = state.harmonyModules.length;
state.harmonyModules.push(request);
}
return `__WEBPACK_IMPORTED_MODULE_${idx}_${request.replace(/[^A-Za-z0-9_]/g, "_").replace(/__+/g, "_")}__`;
}
static getNewModuleVar(state, request) {
if(state.harmonyModules && state.harmonyModules.indexOf(request) >= 0)
return null;
return this.getModuleVar(state, request);
}
static checkModuleVar(state, request) {
if(!state.harmonyModules || state.harmonyModules.indexOf(request) < 0)
return null;
return this.getModuleVar(state, request);
}
// checks if an harmony dependency is active in a module according to
// precedence rules.
static isActive(module, depInQuestion) {
const desc = depInQuestion.describeHarmonyExport();
if(!desc.exportedName) return true;
let before = true;
for(const moduleDependency of module.dependencies) {
const dep = moduleDependency;
if(dep === depInQuestion) {
before = false;
continue;
}
if(!dep.describeHarmonyExport) continue;
const d = dep.describeHarmonyExport();
if(!d || !d.exportedName) continue;
if(d.exportedName === desc.exportedName) {
if(d.precedence < desc.precedence) {
return false;
}
if(d.precedence === desc.precedence && !before) {
return false;
}
}
}
return true;
}
// get a list of named exports defined in a module
// doesn't include * reexports.
static getActiveExports(module, currentDependency) {
const desc = currentDependency && currentDependency.describeHarmonyExport();
var currentIndex = currentDependency ? module.dependencies.indexOf(currentDependency) : -1;
return module.dependencies.map((dep, idx) => {
return {
dep: dep,
idx: idx
};
}).reduce((arr, data) => {
const dep = data.dep;
if(!dep.describeHarmonyExport) return arr;
const d = dep.describeHarmonyExport();
if(!d) return arr;
if(!desc || (d.precedence < desc.precedence) || (d.precedence === desc.precedence && data.idx < currentIndex)) {
var names = [].concat(d.exportedName);
names.forEach(function(name) {
if(name && arr.indexOf(name) < 0)
arr.push(name);
});
}
return arr;
}, []);
}
}
module.exports = HarmonyModulesHelpers;
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