WIP: calendar view - Githubissues

This takes a JSON file as input (to avoid using GitHub API and does its best to loop over the past X days and figure out an open/closed rate.

const data = require("./blurts-server.json");

const DAY_IN_MS = 24 * 60 * 60 * 1000;

const stats = getRecentStats(data.issues);
console.log(JSON.stringify(stats, null, 2));

function getRecentStats(issues = [], durationDays = 30) {
  const now = new Date();
  const since = new Date(
    Date.UTC(
      now.getFullYear(),
      now.getMonth(),
      now.getDate() - Math.abs(durationDays)
    )
  );
  return {
    daily: $dailyIssueStats(issues, since, now),
    recentOpenedIssues: $recentOpenedIssues(issues, since),
    recentClosedIssues: $recentClosedIssues(issues, since),
  };
}

function $recentClosedIssues(issues, since) {
  return issues
    .filter(
      (issue) =>
        Date.parse(issue.closed_at) >= since && issue.state === "closed"
    )
    .map((issue) => issue.number);
}

function $recentOpenedIssues(issues, since) {
  return issues
    .filter(
      (issue) => Date.parse(issue.created_at) >= since && issue.state === "open"
    )
    .map((issue) => issue.number);
}

function $dailyIssueStats(issues, since, now = new Date()) {
  const daily = [];
  for (
    let start_time = since.getTime();
    start_time <= now.getTime();
    start_time += DAY_IN_MS
  ) {
    const end_time = start_time + DAY_IN_MS;
    const openIssues = data.issues
      .filter((issue) => {
        const created_at = Date.parse(issue.created_at);
        const closed_at = issue.closed_at ? Date.parse(issue.closed_at) : now;
        return created_at <= end_time && closed_at >= start_time;
      })
      .map((issue) => issue.number).length;

    const newIssues = data.issues
      .filter((issue) => {
        const created_at = Date.parse(issue.created_at);
        return created_at >= start_time && created_at < end_time;
      })
      .map((issue) => issue.number).length;

    const closedIssues = data.issues
      .filter((issue) => {
        const closed_at = Date.parse(issue.closed_at);
        return closed_at >= start_time && closed_at < end_time;
      })
      .map((issue) => issue.number).length;

    daily.push({
      startTime: new Date(start_time),
      endTime: new Date(end_time),
      openIssues,
      newIssues,
      closedIssues,
    });
  }
  return daily;
}

OUTPUT

{
  "daily": [
    {
      "startTime": "2020-03-04T00:00:00.000Z",
      "endTime": "2020-03-05T00:00:00.000Z",
      "openIssues": 190,
      "newIssues": 0,
      "closedIssues": 0
    },
    ...
    {
      "startTime": "2020-04-03T00:00:00.000Z",
      "endTime": "2020-04-04T00:00:00.000Z",
      "openIssues": 210,
      "newIssues": 0,
      "closedIssues": 0
    }
  ],
  "recentOpenedIssues": [
    1630,
    1629,
    1628,
    ...
  ],
  "recentClosedIssues": [
    ...
    1569,
    1498,
    1469
  ]
}

Possibly good enough to get us to somewhere that we can chart using chart.js or whatever library works. I used chartjs on covid-canada and it was easy to hot-link to a hosting thing, but probably suboptimal approach.

pdehaan / repo-health-report

WIP: calendar view #7

OUTPUT