Files
snk/packages/github-user-contribution/index.ts
2022-03-23 16:57:51 +01:00

132 lines
3.3 KiB
TypeScript

import fetch from "node-fetch";
import * as cheerio from "cheerio";
import { formatParams, Options } from "./formatParams";
/**
* get the contribution grid from a github user page
*
* use options.from=YYYY-MM-DD options.to=YYYY-MM-DD to get the contribution grid for a specific time range
* or year=2019 as an alias for from=2019-01-01 to=2019-12-31
*
* otherwise return use the time range from today minus one year to today ( as seen in github profile page )
*
* @param userName github user name
* @param options
*
* @example
* getGithubUserContribution("platane", { from: "2019-01-01", to: "2019-12-31" })
* getGithubUserContribution("platane", { year: 2019 })
*
*/
export const getGithubUserContribution = async (
userName: string,
options: Options = {}
) => {
// either use github.com/users/xxxx/contributions for previous years
// or github.com/xxxx ( which gives the latest update to today result )
const url =
"year" in options || "from" in options || "to" in options
? `https://github.com/users/${userName}/contributions?` +
formatParams(options)
: `https://github.com/${userName}`;
const res = await fetch(url);
if (!res.ok) throw new Error(res.statusText);
const resText = await res.text();
return parseUserPage(resText);
};
const defaultColorScheme = [
"#ebedf0",
"#9be9a8",
"#40c463",
"#30a14e",
"#216e39",
];
const parseUserPage = (content: string) => {
const $ = cheerio.load(content);
//
// "parse" colorScheme
const colorScheme = [...defaultColorScheme];
//
// parse cells
const rawCells = $(".js-calendar-graph rect[data-count]")
.toArray()
.map((x) => {
const level = +x.attribs["data-level"];
const count = +x.attribs["data-count"];
const date = x.attribs["data-date"];
const color = colorScheme[level];
if (!color) throw new Error("could not determine the color of the cell");
return {
svgPosition: getSvgPosition(x),
color,
count,
date,
};
});
const xMap: Record<number, true> = {};
const yMap: Record<number, true> = {};
rawCells.forEach(({ svgPosition: { x, y } }) => {
xMap[x] = true;
yMap[y] = true;
});
const xRange = Object.keys(xMap)
.map((x) => +x)
.sort((a, b) => +a - +b);
const yRange = Object.keys(yMap)
.map((x) => +x)
.sort((a, b) => +a - +b);
const cells = rawCells.map(({ svgPosition, ...c }) => ({
...c,
x: xRange.indexOf(svgPosition.x),
y: yRange.indexOf(svgPosition.y),
}));
return { cells, colorScheme };
};
// returns the position of the svg elements, accounting for it's transform and it's parent transform
// ( only accounts for translate transform )
const getSvgPosition = (
e: cheerio.Element | null
): { x: number; y: number } => {
if (!e || e.tagName === "svg") return { x: 0, y: 0 };
const p = getSvgPosition(e.parent as cheerio.Element);
if (e.attribs.x) p.x += +e.attribs.x;
if (e.attribs.y) p.y += +e.attribs.y;
if (e.attribs.transform) {
const m = e.attribs.transform.match(
/translate\( *([\.\d]+) *, *([\.\d]+) *\)/
);
if (m) {
p.x += +m[1];
p.y += +m[2];
}
}
return p;
};
type ThenArg<T> = T extends PromiseLike<infer U> ? U : T;
export type Res = ThenArg<ReturnType<typeof getGithubUserContribution>>;
export type Cell = Res["cells"][number];