75 lines
2.3 KiB
TypeScript
75 lines
2.3 KiB
TypeScript
/**
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* Stops older dumps from showing a site's icon as their thumbnail. The metadata
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* fetch used to fall back on the page's icon, and then on a guessed
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* `/favicon.ico`, so most thumbnails were a 16×16 icon, or a 404, that the UI
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* stretched over a 128×72 box. It now stops at real artwork, and a missing
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* `thumbnailUrl` means none, which the frontend draws a placeholder for. This
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* gives the older rows that meaning, by moving their icons out of
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* `rich_content.thumbnailUrl` into the new `faviconUrl`.
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*
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* It judges the stored URL alone and fetches nothing, so it doesn't fill
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* `accentColor`. The frontend derives a hue from the hostname when it is
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* missing, and refreshing a dump's metadata fetches the real one.
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*
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* @module
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*/
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import type { DatabaseSync } from "node:sqlite";
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/**
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* Checks whether a stored thumbnail URL is a site icon. It is loose on
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* purpose, since artwork taken for an icon still shows whole on a tinted field,
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* only not cropped to fill the box. 0012 fixes the rows it got wrong.
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*/
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function isIconUrl(raw: string): boolean {
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let pathname: string;
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try {
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pathname = new URL(raw).pathname;
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} catch {
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return false;
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}
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return /favicon|apple-touch-icon|\/icons?\//i.test(pathname) ||
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/\.(ico|svg)$/i.test(pathname);
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}
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/**
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* Run once by `runMigrations`. It leaves alone a row that already has a
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* `faviconUrl`, and one whose `rich_content` doesn't parse. 0012 undoes its
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* mistakes.
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*/
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export function up(db: DatabaseSync): void {
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const rows = db.prepare(
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`SELECT id, rich_content FROM dumps
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WHERE kind = 'url' AND rich_content IS NOT NULL;`,
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).all() as { id: string; rich_content: string }[];
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const update = db.prepare(
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`UPDATE dumps SET rich_content = ? WHERE id = ?;`,
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);
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let patched = 0;
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for (const row of rows) {
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let rich: { thumbnailUrl?: string; faviconUrl?: string };
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try {
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rich = JSON.parse(row.rich_content);
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} catch {
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continue;
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}
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if (rich.faviconUrl || !rich.thumbnailUrl) continue;
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if (!isIconUrl(rich.thumbnailUrl)) continue;
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const { thumbnailUrl: _dropped, ...rest } = rich;
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update.run(
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JSON.stringify({ ...rest, faviconUrl: rich.thumbnailUrl }),
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row.id,
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);
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patched++;
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}
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if (patched > 0) {
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console.log(
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`[migrate] 0011: reclassified ${patched} favicon thumbnail(s)`,
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);
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}
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}
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