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links.js
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links.js
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'use strict';
const FIXES_RE = /(Close[ds]?|Fix(e[ds])?|Resolve[sd]?)\s*:\s*(\S+)/mgi;
const FIX_RE = /(Close[ds]?|Fix(e[ds])?|Resolve[sd]?)\s*:\s*(\S+)/i;
const REFS_RE = /Refs?\s*:\s*(\S+)/mgi;
const REF_RE = /Refs?\s*:\s*(\S+)/i;
const cheerio = require('cheerio');
/**
* Most of this class is ported from node-review
*/
class LinkParser {
constructor(owner, repo, html) {
this.owner = owner;
this.repo = repo;
this.$ = cheerio.load(html);
}
getFixesUrlsFromArray(arr) {
const { owner, repo } = this;
const result = [];
for (const item of arr) {
const m = item.match(FIX_RE);
if (!m) continue;
const fix = m[3];
const url = fix.replace(/^#/,
`${owner}/${repo}#`).replace('#', '/issues/');
result.push(`https://github.com/${url}`);
}
return result;
}
getRefsUrlsFromArray(arr) {
const result = [];
for (const item of arr) {
const m = item.match(REF_RE);
if (!m) continue;
const ref = m[1];
const url = this.getRefUrlFromOP(ref);
if (url) result.push(url);
}
return result;
}
// Do this so we can reliably get the correct url.
// Otherwise, the number could reference a PR or an issue.
getRefUrlFromOP(ref) {
const as = this.$('a');
const links = as.map((i, el) => this.$(el)).get();
for (const link of links) {
const text = link.text();
if (text === ref) {
const href = link.attr('href');
if (href) return href;
}
}
}
getFixes() {
const text = this.$.text();
const fixes = text.match(FIXES_RE);
if (fixes) {
return this.getFixesUrlsFromArray(fixes);
}
return [];
}
getRefs() {
const text = this.$.text();
const refs = text.match(REFS_RE);
if (refs) {
return this.getRefsUrlsFromArray(refs);
}
return [];
}
};
const GITHUB_PULL_REQUEST_URL = /github.com\/([^/]+)\/([^/]+)\/pull\/(\d+)/;
LinkParser.parsePRFromURL = function(url) {
if (typeof url !== 'string') {
return undefined;
}
const match = url.match(GITHUB_PULL_REQUEST_URL);
if (match) {
return {
owner: match[1],
repo: match[2],
prid: parseInt(match[3])
};
}
return undefined;
};
LinkParser.getPrURL = function({ owner, repo, prid }) {
return `https://github.com/${owner}/${repo}/pull/${prid}`;
};
const PR_URL_RE = /PR-URL: https:\/\/github.com\/.+/;
LinkParser.parsePrURL = function(text) {
if (typeof text !== 'string') {
return undefined;
}
const match = text.match(PR_URL_RE);
if (!match) {
return undefined;
}
return LinkParser.parsePRFromURL(match[0]);
};
module.exports = LinkParser;