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const utility = require('../utility');
const asciichart = require('asciichart');
const term = require('terminal-kit').terminal;
const chrono = require('chrono-node');
const formatDate = require('dateformat');
const getLabelPlacements = (from, to, width, dateFormat, maxLabels) => {
for (let count = maxLabels; count >= 1; count--) {
const placements = [];
let previousEnd = -1;
for (let i = 0; i < count; i++) {
const ratio = count === 1 ? 0 : i / (count - 1);
const position = Math.round(ratio * (width - 1));
const value = new Date(from.getTime() + Math.round((to.getTime() - from.getTime()) * ratio));
const label = formatDate(value, dateFormat);
let start = position - Math.floor(label.length / 2);
if (start < 0) {
start = 0;
}
if (start + label.length > width) {
start = Math.max(0, width - label.length);
}
const end = start + label.length - 1;
if (i > 0 && start <= previousEnd + 1) {
placements.length = 0;
break;
}
placements.push({ position, start, label, end });
previousEnd = end;
}
if (placements.length) {
return placements;
}
}
return [];
};
const renderXAxisLabels = (from, to, width, dateFormat, leftPadding) => {
const sampleLabel = formatDate(from, dateFormat);
const maxLabels = Math.max(1, Math.floor((width + 2) / (sampleLabel.length + 2)));
const placements = getLabelPlacements(from, to, width, dateFormat, maxLabels);
const ticks = Array(width).fill(' ');
const labels = Array(width).fill(' ');
for (const placement of placements) {
ticks[placement.position] = '|';
for (let i = 0; i < placement.label.length; i++) {
labels[placement.start + i] = placement.label[i];
}
}
return `${leftPadding}${ticks.join('')}\n${leftPadding}${labels.join('')}`;
};
module.exports = async args => {
// Make sure kanbn has been initialised
if (!await kanbn.initialised()) {
utility.error('Kanbn has not been initialised in this folder\nTry running: {b}kanbn init{b}');
return;
}
const index = await kanbn.getIndex();
// Get sprint numbers or names
let sprints = null;
if (args.sprint) {
sprints = utility.arrayArg(args.sprint).map(s => {
const sprintNumber = parseInt(s);
return isNaN(sprintNumber) ? s : sprintNumber;
});
}
// Get dates
let dates = null;
if (args.date) {
dates = utility.arrayArg(args.date);
if (dates.length) {
for (let i = 0; i < dates.length; i++) {
const dateValue = chrono.parseDate(dates[i]);
if (dateValue === null) {
utility.error('Unable to parse date');
return;
}
dates[i] = dateValue;
}
}
}
// Get assigned
let assigned = null;
if (args.assigned) {
assigned = utility.strArg(args.assigned);
}
// Get columns
let columns = null;
if (args.column) {
columns = utility.arrayArg(args.column);
}
// Get normalisation mode
let normalise = null;
if (args.normalise) {
normalise = args.normalise.toLowerCase();
if (!['days', 'hours', 'minutes', 'seconds'].includes(normalise)) {
normalise = 'auto';
}
}
// Show burndown chart
kanbn
.burndown(sprints, dates, assigned, columns, normalise)
.then(data => {
if (args.json) {
// Output raw data
console.log(JSON.stringify(data, null, 2));
} else {
// Render chart
const PADDING = ' ';
const width = Math.max(1, term.width - (PADDING.length + 1));
const plots = [];
for (const s of data.series) {
const plot = [];
const span = Math.max(1, s.to.getTime() - s.from.getTime());
const delta = width > 1 ? span / (width - 1) : 0;
for (let i = 0; i < width; i++) {
const x = new Date(s.from.getTime() + Math.round(i * delta));
plot.push((s.dataPoints.find(d => d.x >= x) || s.dataPoints[0]).y);
}
plots.push(plot);
}
const referenceSeries = data.series[0];
const dateFormat = kanbn.getDateFormat(index);
console.log(`${formatDate(referenceSeries.from, dateFormat)} to ${formatDate(referenceSeries.to, dateFormat)}:`);
console.log(asciichart.plot(
plots,
{
offset: 2,
height: 10,
padding: PADDING,
format: x => (PADDING + x.toFixed(0)).slice(-PADDING.length),
colors: [
asciichart.default,
asciichart.green,
asciichart.blue,
asciichart.red
]
}
));
console.log(renderXAxisLabels(
referenceSeries.from,
referenceSeries.to,
width,
dateFormat,
' '.repeat(PADDING.length + 1)
));
}
})
.catch(error => {
utility.error(error);
});
};
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