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/*
	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();

class SyncWaterfallHook extends Hook {
	constructor(args) {
		super(args);
		if (args.length < 1)
			throw new Error("Waterfall hooks must have at least one argument");
	}

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

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

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

module.exports = SyncWaterfallHook;