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chore(media_types): move extensions utility #4358

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merged 2 commits into from
Feb 21, 2024
Merged

chore(media_types): move extensions utility #4358

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b4dad7b
chore(media_types): move `extensions` utility
iuioiua Feb 20, 2024
17c6d4d
Update extensions_by_type.ts
iuioiua Feb 21, 2024
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61 changes: 31 additions & 30 deletions media_types/_db.ts
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Original file line number Diff line number Diff line change
@@ -1,46 +1,47 @@
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import db from "./vendor/mime-db.v1.52.0.ts";
import { type DBEntry, extensions } from "./_util.ts";
import { type DBEntry } from "./_util.ts";

export type KeyOfDb = keyof typeof db;

/** A map of the media type for a given extension */
export const types = new Map<string, KeyOfDb>();

/** A map of extensions for a given media type. */
const extensions: Map<string, string[]> = new Map();

/** Internal function to populate the maps based on the Mime DB. */
(function populateMaps() {
const preference = ["nginx", "apache", undefined, "iana"];
const preference = ["nginx", "apache", undefined, "iana"];

for (const type of Object.keys(db) as KeyOfDb[]) {
const mime = db[type] as DBEntry;
const exts = mime.extensions;
for (const type of Object.keys(db) as KeyOfDb[]) {
const mime = db[type] as DBEntry;
const exts = mime.extensions;

if (!exts || !exts.length) {
continue;
}
if (!exts || !exts.length) {
continue;
}

// @ts-ignore work around denoland/dnt#148
extensions.set(type, exts);

for (const ext of exts) {
const current = types.get(ext);
if (current) {
const from = preference.indexOf((db[current] as DBEntry).source);
const to = preference.indexOf(mime.source);

if (
current !== "application/octet-stream" &&
(from > to ||
// @ts-ignore work around denoland/dnt#148
(from === to && current.startsWith("application/")))
) {
continue;
}
// @ts-ignore work around denoland/dnt#148
extensions.set(type, exts);

for (const ext of exts) {
const current = types.get(ext);
if (current) {
const from = preference.indexOf((db[current] as DBEntry).source);
const to = preference.indexOf(mime.source);

if (
current !== "application/octet-stream" &&
(from > to ||
// @ts-ignore work around denoland/dnt#148
(from === to && current.startsWith("application/")))
) {
continue;
}

types.set(ext, type);
}

types.set(ext, type);
}
})();
}

export { db };
export { db, extensions };
3 changes: 0 additions & 3 deletions media_types/_util.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,6 @@ export interface DBEntry {
extensions?: string[];
}

/** A map of extensions for a given media type. */
export const extensions: Map<string, string[]> = new Map();

export function consumeToken(v: string): [token: string, rest: string] {
const notPos = indexOf(v, isNotTokenChar);
if (notPos === -1) {
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3 changes: 1 addition & 2 deletions media_types/extensions_by_type.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,7 @@
// This module is browser compatible.

import { parseMediaType } from "./parse_media_type.ts";
import { extensions } from "./_util.ts";
import "./_db.ts";
import { extensions } from "./_db.ts";

export { extensions };

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