File size: 4,997 Bytes
96e86e5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | type MarkdownNode = {
type: string;
value?: string;
url?: string;
children?: MarkdownNode[];
};
const BARE_ISSUE_IDENTIFIER_RE = /^[A-Z][A-Z0-9]+-\d+$/i;
const ISSUE_SCHEME_RE = /^issue:\/\/:?([^?#\s]+)(?:[?#].*)?$/i;
const ISSUE_REFERENCE_TOKEN_RE = /issue:\/\/:?[^\s<>()]+|https?:\/\/[^\s<>()]+|\/(?:[^\s<>()/]+\/)*issues\/[A-Z][A-Z0-9]+-\d+(?=$|[\s<>)\],.;!?:])|\b[A-Z][A-Z0-9]+-\d+\b/gi;
export function parseIssuePathIdFromPath(pathOrUrl: string | null | undefined): string | null {
if (!pathOrUrl) return null;
let pathname = pathOrUrl.trim();
if (!pathname) return null;
if (/^https?:\/\//i.test(pathname)) {
try {
const url = new URL(pathname);
if (url.hostname === "github.com" || url.hostname === "www.github.com") return null;
pathname = url.pathname;
} catch {
return null;
}
}
const segments = pathname.split("/").filter(Boolean);
const issueIndex = segments.findIndex((segment) => segment === "issues");
if (issueIndex === -1 || issueIndex === segments.length - 1) return null;
const issuePathId = decodeURIComponent(segments[issueIndex + 1] ?? "");
if (!issuePathId || issuePathId.startsWith(":")) return null;
return BARE_ISSUE_IDENTIFIER_RE.test(issuePathId) ? issuePathId.toUpperCase() : issuePathId;
}
export function parseIssueReferenceFromHref(href: string | null | undefined) {
if (!href) return null;
const trimmed = href.trim();
const issueSchemeMatch = trimmed.match(ISSUE_SCHEME_RE);
if (issueSchemeMatch?.[1]) {
const issuePathId = decodeURIComponent(issueSchemeMatch[1]);
return {
issuePathId,
href: `/issues/${encodeURIComponent(issuePathId)}`,
};
}
const pathId = parseIssuePathIdFromPath(href);
if (pathId) {
return {
issuePathId: pathId,
href: `/issues/${encodeURIComponent(pathId)}`,
};
}
if (!BARE_ISSUE_IDENTIFIER_RE.test(trimmed)) return null;
const normalized = trimmed.toUpperCase();
return {
issuePathId: normalized,
href: `/issues/${encodeURIComponent(normalized)}`,
};
}
function splitTrailingPunctuation(token: string) {
let core = token;
let trailing = "";
while (core.length > 0) {
const lastChar = core.at(-1);
if (!lastChar || !/[),.;!?:\]]/.test(lastChar)) break;
if (lastChar === ")") {
const openCount = (core.match(/\(/g) ?? []).length;
const closeCount = (core.match(/\)/g) ?? []).length;
if (closeCount <= openCount) break;
}
if (lastChar === "]") {
const openCount = (core.match(/\[/g) ?? []).length;
const closeCount = (core.match(/\]/g) ?? []).length;
if (closeCount <= openCount) break;
}
trailing = `${lastChar}${trailing}`;
core = core.slice(0, -1);
}
return { core, trailing };
}
function createIssueLinkNode(value: string, href: string, childType: "text" | "inlineCode" = "text"): MarkdownNode {
return {
type: "link",
url: href,
children: [{ type: childType, value }],
};
}
function linkifyIssueReferencesInText(value: string): MarkdownNode[] | null {
const nodes: MarkdownNode[] = [];
let cursor = 0;
let matched = false;
for (const match of value.matchAll(ISSUE_REFERENCE_TOKEN_RE)) {
const raw = match[0];
if (!raw) continue;
const start = match.index ?? 0;
const end = start + raw.length;
const { core, trailing } = splitTrailingPunctuation(raw);
const issueRef = parseIssueReferenceFromHref(core);
if (!issueRef) continue;
matched = true;
if (start > cursor) {
nodes.push({ type: "text", value: value.slice(cursor, start) });
}
nodes.push(createIssueLinkNode(core, issueRef.href));
if (trailing) {
nodes.push({ type: "text", value: trailing });
}
cursor = end;
}
if (!matched) return null;
if (cursor < value.length) {
nodes.push({ type: "text", value: value.slice(cursor) });
}
return nodes;
}
function rewriteMarkdownTree(node: MarkdownNode) {
if (!Array.isArray(node.children) || node.children.length === 0) return;
if (node.type === "link" || node.type === "linkReference" || node.type === "code" || node.type === "definition" || node.type === "html") {
return;
}
const nextChildren: MarkdownNode[] = [];
for (const child of node.children) {
if (child.type === "inlineCode" && typeof child.value === "string") {
const issueRef = parseIssueReferenceFromHref(child.value);
if (issueRef) {
nextChildren.push(createIssueLinkNode(child.value, issueRef.href, "inlineCode"));
continue;
}
}
if (child.type === "text" && typeof child.value === "string") {
const linked = linkifyIssueReferencesInText(child.value);
if (linked) {
nextChildren.push(...linked);
continue;
}
}
rewriteMarkdownTree(child);
nextChildren.push(child);
}
node.children = nextChildren;
}
export function remarkLinkIssueReferences() {
return (tree: MarkdownNode) => {
rewriteMarkdownTree(tree);
};
}
|