Horários BHTrans

bhtrans.js

// Extract timetables from BHTrans page
// for instance: http://servicosbhtrans.pbh.gov.br/bhtrans/e-servicos/S01F02-quadroHorarioResultado.asp?linha=SC01R

// fetch tables
let tables = document.querySelectorAll('table')

// work on each table
Array.from(tables).map((table, index) => {
	// ignore first table
	if (index) {
		// fetch rows
		let rows = table.children[0].children

		// fetch cells
		let parsed_table =
			Array.from(rows)
				.map(row => Array
					.from(row.children)
					.map(cell => cell.textContent.trim())
				)

		// strip out first column
		parsed_table = parsed_table.map(row => row.slice(1))

		// transpose table
		let transposed_table = parsed_table[0].map((col, c) => {
			// for each column, iterate all rows
			return parsed_table.map((row, r) => { 
				return parsed_table[r][c]
			})
		})

		// extract times
		let times = []
		transposed_table.map((row, indexRow) => {
			transposed_table[indexRow].map((value, index) => {
				if (index && value) {
					times.push(`${transposed_table[indexRow][0]}:${value}`)
				}
			})
		})

		// returns data
		console.log(times.join(', '))
	}
})