app/lib/carrel/front-matter-lines.ts

Functions

Imports

It imports no other module of this repo. Imported by app/lib/carrel/dictionary-handler.server.ts, app/lib/carrel/page-handler.server.ts, app/lib/carrel/procedure-handler.server.ts, app/lib/carrel/publication-handler.server.ts, app/lib/carrel/registry-handler.server.ts, app/lib/carrel/site-adapter.server.ts.

Source

1// Status edits on a content file's front matter, by line, for every kind Carrel writes. Shared by the
2// kind handlers: a status change must leave every other key byte for byte.
3
4import { RefusedError } from "@dustinedwards/site-api";
5
6/**
7 * Sets `draft` and `publish_at` by line, leaving every other key byte for byte: serializePost writes
8 * only the fields the editor knows, and a status change must not drop the others. The values are
9 * written as serializePost writes them.
10 */
11export function withPublication(raw: string, change: { draft: boolean; publishAt?: string | null }) {
12  const match = /^---\r?\n([\s\S]*?)\r?\n---/.exec(raw);
13  if (!match) throw new RefusedError("The source has no frontmatter block, so its status cannot be set.");
14  let lines = match[1]!.split(/\r?\n/);
15
16  const set = (key: string, value: string | null) => {
17    const at = lines.findIndex((line) => line.startsWith(`${key}:`));
18    if (value === null) {
19      if (at !== -1) lines = lines.filter((_, i) => i !== at);
20    } else if (at !== -1) {
21      lines[at] = `${key}: ${value}`;
22    } else {
23      lines.push(`${key}: ${value}`);
24    }
25  };
26
27  set("draft", change.draft ? "true" : "false");
28  if (change.publishAt !== undefined) {
29    set("publish_at", change.publishAt === null ? null : JSON.stringify(change.publishAt));
30  }
31  return `---\n${lines.join("\n")}\n---${raw.slice(match[0].length)}`;
32}