Replace @std/media-types with mime-db

Replace the @std/media-types dependency with mime-db for MIME type handling.
Extract quote link detection logic into a reusable isQuoteLink function to
eliminate code duplication between bot-impl.ts and message-impl.ts.

Author: dahlia

deno.json

@@ -25,10 +25,10 @@
     "@logtape/logtape": "jsr:@logtape/logtape@^1.0.0",
     "@phensley/language-tag": "npm:@phensley/language-tag@^1.12.2",
     "@std/assert": "jsr:@std/assert@^1.0.12",
-    "@std/media-types": "jsr:@std/media-types@^1.1.0",
     "hono": "jsr:@hono/hono@^4.8.2",
     "html-entities": "npm:html-entities@^2.6.0",
     "markdown-it": "npm:markdown-it@^14.1.0",
+    "mime-db": "npm:mime-db@^1.54.0",
     "uuid": "npm:uuid@^11.1.0",
     "xss": "npm:xss@^1.0.15"
   },

src/bot-impl.ts

@@ -55,8 +55,7 @@ import {
 } from "@fedify/fedify/vocab";
 import { getXForwardedRequest } from "@hongminhee/x-forwarded-fetch";
 import { getLogger } from "@logtape/logtape";
-import { extension } from "@std/media-types/extension";
-import { parseMediaType } from "@std/media-types/parse-media-type";
+import mimeDb from "mime-db";
 import metadata from "../deno.json" with { type: "json" };
 import type { Bot, CreateBotOptions, PagesOptions } from "./bot.ts";
 import {
@@ -85,6 +84,7 @@ import {
   createMessage,
   getMessageVisibility,
   isMessageObject,
+  isQuoteLink,
   messageClasses,
 } from "./message-impl.ts";
 import type { Message, MessageClass, SharedMessage } from "./message.ts";
@@ -681,19 +681,9 @@ export class BotImpl<TContextData> implements Bot<TContextData> {
     let quoteUrl: URL | null = null;
     // FIXME: eliminate this duplication
     for await (const tag of object.getTags(ctx)) {
-      if (tag instanceof Link) {
-        const mediaType = tag.mediaType == null
-          ? null
-          : parseMediaType(tag.mediaType);
-        if (
-          tag.rel === "https://misskey-hub.net/ns#_misskey_quote" ||
-          mediaType?.[0] === "application/activity+json" ||
-          mediaType?.[0] === "application/ld+json" &&
-            mediaType[1]?.profile === "https://www.w3.org/ns/activitystreams"
-        ) {
-          quoteUrl = tag.href;
-          break;
-        }
+      if (tag instanceof Link && isQuoteLink(tag)) {
+        quoteUrl = tag.href;
+        break;
       }
     }
     if (quoteUrl == null) quoteUrl = object.quoteUrl;
@@ -998,9 +988,13 @@ export class BotImpl<TContextData> implements Bot<TContextData> {
     if ("url" in data) {
       url = new URL(data.url);
     } else {
-      const ext = extension(data.type);
+      const t = mimeDb[data.type];
       url = new URL(
-        `/emojis/${name}${ext == null ? "" : `.${ext}`}`,
+        `/emojis/${name}${
+          t == null || t.extensions == null || t.extensions.length < 1
+            ? ""
+            : `.${t.extensions[0]}`
+        }`,
         ctx.origin,
       );
     }

src/message-impl.ts

@@ -38,7 +38,6 @@ import {
   Update,
 } from "@fedify/fedify/vocab";
 import type { LanguageTag } from "@phensley/language-tag";
-import { parseMediaType } from "@std/media-types/parse-media-type";
 import { decode } from "html-entities";
 import { v7 as uuidv7 } from "uuid";
 import { FilterXSS, getDefaultWhiteList } from "xss";
@@ -653,19 +652,8 @@ export async function createMessage<T extends MessageClass, TContextData>(
       mentionedActorIds.add(tag.href.href);
     } else if (tag instanceof Hashtag) {
       hashtags.push(tag);
-    } else if (tag instanceof Link) {
-      // FIXME: eliminate this duplication
-      const mediaType = tag.mediaType == null
-        ? null
-        : parseMediaType(tag.mediaType);
-      if (
-        tag.rel === "https://misskey-hub.net/ns#_misskey_quote" ||
-        mediaType?.[0] === "application/activity+json" ||
-        mediaType?.[0] === "application/ld+json" &&
-          mediaType[1]?.profile === "https://www.w3.org/ns/activitystreams"
-      ) {
-        quoteLinks.push(tag);
-      }
+    } else if (tag instanceof Link && isQuoteLink(tag)) {
+      quoteLinks.push(tag);
     }
   }
   const attachments: Document[] = [];
@@ -773,3 +761,21 @@ export function getMessageVisibility(
     ? "direct"
     : "unknown";
 }
+
+export function isQuoteLink(tag: Link): boolean {
+  if (tag.rel === "https://misskey-hub.net/ns#_misskey_quote") return true;
+  else if (tag.mediaType == null) return false;
+  // FIXME: Properly parse the media type
+  const parsed = tag.mediaType.split(";");
+  const type = parsed[0].trim();
+  if (type === "application/activity+json") return true;
+  const params: Record<string, string> = {};
+  for (let i = 1; i < parsed.length; i++) {
+    const param = parsed[i].trim().split("=");
+    if (param.length === 2) {
+      params[param[0]] = param[1].replace(/"/g, "");
+    }
+  }
+  return type === "application/ld+json" &&
+    params.profile === "https://www.w3.org/ns/activitystreams";
+}