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MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

"use strict";

const asyncLib = require("async");

const path = require("path");

const Tapable = require("tapable");

const ContextModule = require("./ContextModule");

const ContextElementDependency = require("./dependencies/ContextElementDependency");

module.exports = class ContextModuleFactory extends Tapable {

constructor(resolvers) {

super();

this.resolvers = resolvers;

}

create(data, callback) {

const module = this;

const context = data.context;

const dependencies = data.dependencies;

const dependency = dependencies[0];

this.applyPluginsAsyncWaterfall("before-resolve", {

context: context,

request: dependency.request,

recursive: dependency.recursive,

regExp: dependency.regExp,

async: dependency.async,

dependencies: dependencies

}, (err, result) => {

if(err) return callback(err);

// Ignored

if(!result) return callback();

const context = result.context;

const request = result.request;

const recursive = result.recursive;

const regExp = result.regExp;

const asyncContext = result.async;

const dependencies = result.dependencies;

let loaders, resource, loadersPrefix = "";

const idx = request.lastIndexOf("!");

if(idx >= 0) {

loaders = request.substr(0, idx + 1);

let i;

for(i = 0; i < loaders.length && loaders[i] === "!"; i++) {

loadersPrefix += "!";

}

loaders = loaders.substr(i).replace(/!+$/, "").replace(/!!+/g, "!");

if(loaders === "") loaders = [];

else loaders = loaders.split("!");

resource = request.substr(idx + 1);

} else {

loaders = [];

resource = request;

}

const resolvers = module.resolvers;

asyncLib.parallel([

function(callback) {

resolvers.context.resolve({}, context, resource, function(err, result) {

if(err) return callback(err);

callback(null, result);

});

function(callback) {

asyncLib.map(loaders, function(loader, callback) {

resolvers.loader.resolve({}, context, loader, function(err, result) {

if(err) return callback(err);

callback(null, result);

});

}, callback);

}

], (err, result) => {

if(err) return callback(err);

module.applyPluginsAsyncWaterfall("after-resolve", {

loaders: loadersPrefix + result[1].join("!") + (result[1].length > 0 ? "!" : ""),

resource: result[0],

recursive: recursive,

regExp: regExp,

async: asyncContext,

dependencies: dependencies,

resolveDependencies: module.resolveDependencies.bind(module)

}, function(err, result) {

if(err) return callback(err);

// Ignored

if(!result) return callback();

return callback(null, new ContextModule(result.resolveDependencies, result.resource, result.recursive, result.regExp, result.loaders, result.async, dependency.chunkName));

});

}

resolveDependencies(fs, resource, recursive, regExp, callback) {

if(!regExp || !resource)

return callback(null, []);

(function addDirectory(directory, callback) {

fs.readdir(directory, (err, files) => {

if(err) return callback(err);

if(!files || files.length === 0) return callback(null, []);

asyncLib.map(files.filter(function(p) {

return p.indexOf(".") !== 0;

}), (seqment, callback) => {

const subResource = path.join(directory, seqment);

fs.stat(subResource, (err, stat) => {

if(err) return callback(err);

if(stat.isDirectory()) {

if(!recursive) return callback();

addDirectory.call(this, subResource, callback);

} else if(stat.isFile()) {

const obj = {

context: resource,

request: "." + subResource.substr(resource.length).replace(/\\/g, "/")

};

this.applyPluginsAsyncWaterfall("alternatives", [obj], (err, alternatives) => {

if(err) return callback(err);

alternatives = alternatives.filter(function(obj) {

return regExp.test(obj.request);

}).map(function(obj) {

const dep = new ContextElementDependency(obj.request);

dep.optional = true;

return dep;

});

callback(null, alternatives);

});

} else callback();

});

}, (err, result) => {

if(err) return callback(err);

if(!result) return callback(null, []);

callback(null, result.filter(function(i) {

return !!i;

}).reduce(function(a, i) {

return a.concat(i);

}, []));

});

}.call(this, resource, callback));

}

};

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