source: frontend/node_modules/tapable/lib/SyncWaterfallHook.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/
"use strict";

const Hook = require("./Hook");
const HookCodeFactory = require("./HookCodeFactory");

class SyncWaterfallHookCodeFactory extends HookCodeFactory {
        content({ onError, onResult, resultReturns, rethrowIfPossible }) {
                return this.callTapsSeries({
                        onError: (i, err) => onError(err),
                        onResult: (i, result, next) => {
                                let code = "";
                                code += `if(${result} !== undefined) {\n`;
                                code += `${this._args[0]} = ${result};\n`;
                                code += "}\n";
                                code += next();
                                return code;
                        },
                        onDone: () => onResult(this._args[0]),
                        doneReturns: resultReturns,
                        rethrowIfPossible
                });
        }
}

const factory = new SyncWaterfallHookCodeFactory();

const TAP_ASYNC = () => {
        throw new Error("tapAsync is not supported on a SyncWaterfallHook");
};

const TAP_PROMISE = () => {
        throw new Error("tapPromise is not supported on a SyncWaterfallHook");
};

function COMPILE(options) {
        factory.setup(this, options);
        return factory.create(options);
}

function SyncWaterfallHook(args = [], name = undefined) {
        if (args.length < 1) {
                throw new Error("Waterfall hooks must have at least one argument");
        }
        const hook = new Hook(args, name);
        hook.constructor = SyncWaterfallHook;
        hook.tapAsync = TAP_ASYNC;
        hook.tapPromise = TAP_PROMISE;
        hook.compile = COMPILE;
        return hook;
}

SyncWaterfallHook.prototype = null;

module.exports = SyncWaterfallHook;