106 lines
2.1 KiB
JavaScript
106 lines
2.1 KiB
JavaScript
'use strict';
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var _ = require('lodash');
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var constants = require('./constants');
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var BN = require('bn.js');
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var utils = {};
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utils.isHeight = function(blockArg) {
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return _.isNumber(blockArg) || (blockArg.length < 40 && /^[0-9]+$/.test(blockArg));
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};
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//start
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utils.isAbsolutePath = require('path').isAbsolute;
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if (!utils.isAbsolutePath) {
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utils.isAbsolutePath = require('path-is-absolute');
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}
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//main
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utils.parseParamsWithJSON = function(paramsArg) {
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var params = paramsArg.map(function(paramArg) {
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var param;
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try {
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param = JSON.parse(paramArg);
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} catch(err) {
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param = paramArg;
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}
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return param;
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});
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return params;
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};
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utils.getTerminalKey = function(startKey) {
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if (!startKey || !Buffer.isBuffer(startKey)) {
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return;
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}
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var bn = new BN(startKey);
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var endBN = bn.iaddn(1);
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return endBN.toBuffer();
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};
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utils.diffTime = function(time) {
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var diff = process.hrtime(time);
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return (diff[0] * 1E9 + diff[1])/(1E9 * 1.0);
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};
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utils.sendError = function(err, res) {
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if (err.statusCode) {
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res.status(err.statusCode).send(err.message);
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} else {
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console.error(err.stack);
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res.status(503).send(err.message);
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}
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};
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utils.encodeTip = function(tip, name) {
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var key = Buffer.concat([ constants.DB_PREFIX,
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new Buffer('tip-' + name, 'utf8') ]);
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var heightBuf = new Buffer(4);
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heightBuf.writeUInt32BE(tip.height);
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var value = Buffer.concat([ heightBuf, new Buffer(tip.hash, 'hex') ]);
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return { key: key, value: value };
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};
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utils.SimpleMap = function SimpleMap() {
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var object = {};
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var array = [];
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this.size = 0;
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this.length = 0;
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this.hasNullItems = function() {
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return array.length !== _.compact(array).length;
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};
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this.get = function (key) {
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return array[object[key]];
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};
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this.set = function (key, value, pos) {
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object[key] = array.length;
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if (pos >= 0) {
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array[pos] = value;
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} else {
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array.push(value);
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}
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this.size = array.length;
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this.length = array.length;
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};
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this.getIndex = function (index) {
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return array[index];
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};
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this.getLastIndex = function () {
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return array[array.length - 1];
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};
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};
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module.exports = utils;
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