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101 lines
2.8 KiB
101 lines
2.8 KiB
var models = require('../models'); |
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var express = require('express'); |
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var router = express.Router(); |
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var HeightOffset = require('../config/config')['syncHeightOffset'] || 0; |
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const BLOCKS_PER_PAGE = 50; |
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const PAGINATION_LIMIT = 5; |
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function formatRate(hashrate, decimals = 2) { |
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if (hashrate === 0) return '0 H/s'; |
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const k = 1000; |
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const dm = decimals < 0 ? 0 : decimals; |
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const sizes = ['H/s', 'KH/s', 'MH/s', 'GH/s', 'TH/s', 'PH/s', 'EH/s', 'ZH/s', 'YH/s']; |
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const i = Math.floor(Math.log(hashrate) / Math.log(k)); |
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return parseFloat((hashrate / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]; |
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} |
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function shorterHash(hash) { |
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var parts = hash.match(/[\s\S]{1,14}/g) || []; |
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return parts[0] + '...' + parts[parts.length-1]; |
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} |
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function formatRate(bytes, decimals = 2) { |
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if (bytes === 0) return '0 Bytes'; |
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const k = 1000; |
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const dm = decimals < 0 ? 0 : decimals; |
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const sizes = ['H/s', 'KH/s', 'MH/s', 'GH/s', 'TH/s', 'PH/s', 'EH/s', 'ZH/s', 'YH/s']; |
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const i = Math.floor(Math.log(bytes) / Math.log(k)); |
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return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]; |
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} |
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function getPagination(count, page) { |
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const pagesCount = count > BLOCKS_PER_PAGE ? Math.ceil(count / BLOCKS_PER_PAGE) : 0; |
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let pagination = null; |
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if (pagesCount) { |
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pagination = { |
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'left': null, |
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'range': [], |
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'right': null, |
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} |
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const pagLimitHalf = Math.ceil(PAGINATION_LIMIT / 2); |
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const pagRangeLeft = page - pagLimitHalf; |
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if (pagRangeLeft < 3) { |
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pagination.range[0] = 1; |
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} else { |
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pagination.left = 1; |
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pagination.range[0] = pagRangeLeft; |
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} |
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const pagRangeRight = page + pagLimitHalf; |
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if (pagRangeRight > pagesCount - 3) { |
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pagination.range[1] = pagesCount; |
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} else { |
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pagination.right = pagesCount; |
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pagination.range[1] = pagRangeRight; |
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} |
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} |
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return pagination; |
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} |
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/* GET home page. */ |
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router.get('/:offset*?', async function(req, res, next) { |
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const paramPage = parseInt(req.params.offset); |
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const page = isNaN(paramPage) || paramPage < 1 ? 1 : paramPage; |
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const offset = BLOCKS_PER_PAGE * (page - 1); |
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const blocks = await models.Block.findAll({ |
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attributes: ['height', 'hash', 'time', 'difficulty', 'hashrate'], |
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order: [['height', 'DESC']], |
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limit: BLOCKS_PER_PAGE, |
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offset, |
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}); |
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const count = await models.Block.count(); |
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const pagination = getPagination(count, page); |
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blocks.forEach((arrayItem) => { |
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arrayItem.ago = arrayItem.time.toUTCString().substring(5); |
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arrayItem.difficulty = parseFloat(arrayItem.difficulty).toFixed(8); |
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arrayItem.hashrate = formatRate(arrayItem.hashrate, 4); |
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arrayItem.hash_short = shorterHash(arrayItem.hash); |
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}); |
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res.render('index', { |
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HeightOffset, |
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pagination, |
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blocks, |
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page, |
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}); |
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}); |
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module.exports = router;
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