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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ExternalModule = require("./ExternalModule");
class ExternalModuleFactoryPlugin {
constructor(type, externals) {
this.type = type;
this.externals = externals;
}
apply(normalModuleFactory) {
const globalType = this.type;
normalModuleFactory.plugin("factory", factory => (data, callback) => {
const context = data.context;
const dependency = data.dependencies[0];
function handleExternal(value, type, callback) {
if(typeof type === "function") {
callback = type;
type = undefined;
}
if(value === false) return factory(data, callback);
if(value === true) value = dependency.request;
if(typeof type === "undefined" && /^[a-z0-9]+ /.test(value)) {
const idx = value.indexOf(" ");
type = value.substr(0, idx);
value = value.substr(idx + 1);
}
callback(null, new ExternalModule(value, type || globalType));
return true;
}
(function handleExternals(externals, callback) {
if(typeof externals === "string") {
if(externals === dependency.request) {
return handleExternal(dependency.request, callback);
}
} else if(Array.isArray(externals)) {
let i = 0;
(function next() {
let asyncFlag;
const handleExternalsAndCallback = function handleExternalsAndCallback(err, module) {
if(err) return callback(err);
if(!module) {
if(asyncFlag) {
asyncFlag = false;
return;
}
return next();
}
callback(null, module);
};
do {
asyncFlag = true;
if(i >= externals.length) return callback();
handleExternals(externals[i++], handleExternalsAndCallback);
} while (!asyncFlag); // eslint-disable-line keyword-spacing
asyncFlag = false;
}());
return;
} else if(externals instanceof RegExp) {
if(externals.test(dependency.request)) {
return handleExternal(dependency.request, callback);
}
} else if(typeof externals === "function") {
externals.call(null, context, dependency.request, function(err, value, type) {
if(err) return callback(err);
if(typeof value !== "undefined") {
handleExternal(value, type, callback);
} else {
callback();
}
});
return;
} else if(typeof externals === "object" && Object.prototype.hasOwnProperty.call(externals, dependency.request)) {
return handleExternal(externals[dependency.request], callback);
}
callback();
}(this.externals, function(err, module) {
if(err) return callback(err);
if(!module) return handleExternal(false, callback);
return callback(null, module);
}));
});
}
}
module.exports = ExternalModuleFactoryPlugin;
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