From c81b76666a6a512777235f8b44d8c8870d204339 Mon Sep 17 00:00:00 2001
From: Cynthia Foxwell <gamers@riseup.net>
Date: Thu, 6 Feb 2025 15:42:43 -0700
Subject: [PATCH] betterEmbedsYT: descriptions

---
 src/betterEmbedsYT/index.ts                   | 20 ++++-
 src/betterEmbedsYT/manifest.json              | 26 +++++-
 src/betterEmbedsYT/style.css                  | 14 ++++
 .../webpackModules/description.tsx            | 84 +++++++++++++++++++
 4 files changed, 138 insertions(+), 6 deletions(-)
 create mode 100644 src/betterEmbedsYT/style.css
 create mode 100644 src/betterEmbedsYT/webpackModules/description.tsx

diff --git a/src/betterEmbedsYT/index.ts b/src/betterEmbedsYT/index.ts
index e73df94..1aab075 100644
--- a/src/betterEmbedsYT/index.ts
+++ b/src/betterEmbedsYT/index.ts
@@ -1,3 +1,19 @@
-import { Patch } from "@moonlight-mod/types";
+import { Patch, ExtensionWebpackModule } from "@moonlight-mod/types";
 
-export const patches: Patch[] = [];
+export const patches: Patch[] = [
+  {
+    find: ".VIDEO_EMBED_PLAYBACK_STARTED,",
+    replace: {
+      match: /(case \i\.\i\.VIDEO:)(case \i\.\i\.GIFV:)break;(?=default:(\i)=)/,
+      replacement: (_, VIDEO, GIFV, description) =>
+        `${GIFV}break;${VIDEO}if(this.props.embed.provider?.name==="YouTube"){${description}=require("betterEmbedsYT_description").default(this.props);}break;`
+    },
+    prerequisite: () => moonlight.getConfigOption<boolean>("betterEmbedsYT", "description") ?? true
+  }
+];
+
+export const webpackModules: Record<string, ExtensionWebpackModule> = {
+  description: {
+    dependencies: [{ id: "react" }, { id: "discord/components/common/index" }, { ext: "spacepack", id: "spacepack" }]
+  }
+};
diff --git a/src/betterEmbedsYT/manifest.json b/src/betterEmbedsYT/manifest.json
index 8788fd3..3f19371 100644
--- a/src/betterEmbedsYT/manifest.json
+++ b/src/betterEmbedsYT/manifest.json
@@ -1,16 +1,34 @@
 {
   "$schema": "https://moonlight-mod.github.io/manifest.schema.json",
   "id": "betterEmbedsYT",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "meta": {
     "name": "Better YouTube Embeds",
-    "tagline": "Bypass copyright blocks, block ads and trackers. Works with Watch Together.",
+    "tagline": "Bypass copyright blocks, descriptions, block ads and trackers (works with Watch Together).",
     "description": "Ad blocking uses code from the [Iridium](https://github.com/ParticleCore/Iridium) web extension.",
     "authors": ["Cynosphere"],
     "tags": ["qol", "privacy"],
-    "source": "https://github.com/Cynosphere/moonlight-extensions"
+    "source": "https://github.com/Cynosphere/moonlight-extensions",
+    "changelog": "Added option for showing descriptions"
+  },
+  "settings": {
+    "description": {
+      "displayName": "Show video descriptions",
+      "type": "boolean",
+      "default": true
+    },
+    "fullDescription": {
+      "displayName": "Fetch full descriptions",
+      "description": "Fetches the full description through YouTube's API using one of Google's own API keys",
+      "type": "boolean",
+      "default": true
+    },
+    "expandDescription": {
+      "displayName": "Expand description by default",
+      "type": "boolean",
+      "default": false
+    }
   },
-  "settings": {},
   "apiLevel": 2,
   "blocked": [
     "https://play.google.com/log*",
diff --git a/src/betterEmbedsYT/style.css b/src/betterEmbedsYT/style.css
new file mode 100644
index 0000000..acddd3a
--- /dev/null
+++ b/src/betterEmbedsYT/style.css
@@ -0,0 +1,14 @@
+.betterEmbedsYT-description-button {
+  text-align: center;
+  user-select: none;
+  cursor: pointer;
+  padding-top: 0.25rem;
+}
+
+.betterEmbedsYT-description-firstLine {
+  height: 1.125rem;
+  max-height: 1.125rem;
+  text-overflow: ellipsis;
+  overflow: hidden;
+  white-space: nowrap;
+}
diff --git a/src/betterEmbedsYT/webpackModules/description.tsx b/src/betterEmbedsYT/webpackModules/description.tsx
new file mode 100644
index 0000000..1316f76
--- /dev/null
+++ b/src/betterEmbedsYT/webpackModules/description.tsx
@@ -0,0 +1,84 @@
+import React from "@moonlight-mod/wp/react";
+import spacepack from "@moonlight-mod/wp/spacepack_spacepack";
+import { Clickable } from "@moonlight-mod/wp/discord/components/common/index";
+
+const EmbedClasses = spacepack.findByCode("embedDescription:")[0].exports;
+
+type RenderDescription = (embed: any, description: string, headings: boolean) => React.ReactNode;
+
+const logger = moonlight.getLogger("Better YouTube Embeds - Description");
+const descriptionCache = new Map<string, string>();
+
+const API_KEY = "AIzaSyCpphGplamUhCCEIcum1VyDXBt0i1nOqac"; // one of Google's own
+const FAKE_EMBED = { type: "rich" };
+
+function YTDescription({
+  description,
+  renderDescription,
+  videoId
+}: {
+  description: string;
+  renderDescription: RenderDescription;
+  videoId: string;
+}) {
+  const [expanded, setExpanded] = React.useState(
+    moonlight.getConfigOption<boolean>("betterEmbedsYT", "expandDescription")
+  );
+  const [fullDescription, setFullDescription] = React.useState(
+    descriptionCache.has(videoId) ? descriptionCache.get(videoId) : description
+  );
+
+  React.useEffect(() => {
+    if (!descriptionCache.has(videoId))
+      if (
+        (moonlight.getConfigOption<boolean>("betterEmbedsYT", "fullDescription") ?? true) &&
+        description.endsWith("...") &&
+        description.length >= 300
+      ) {
+        (async () => {
+          try {
+            const data = await fetch(
+              `https://www.googleapis.com/youtube/v3/videos?part=snippet&id=${videoId}&key=${API_KEY}`
+            ).then((res) => res.json());
+            const newDesc = data?.items?.[0]?.snippet?.description ?? description;
+            descriptionCache.set(videoId, newDesc);
+            setFullDescription(newDesc);
+          } catch (err) {
+            logger.error(`Failed to get full description for "${videoId}":`, err);
+            descriptionCache.set(videoId, description);
+          }
+        })();
+      } else {
+        descriptionCache.set(videoId, description);
+      }
+  });
+
+  const lines = fullDescription!.split("\n");
+
+  const rendered = renderDescription(FAKE_EMBED, fullDescription!, false);
+  const firstLine = renderDescription(FAKE_EMBED, lines[0], false);
+
+  return lines.length === 1 && description.length <= 40 ? (
+    <div className={EmbedClasses.embedDescription + " " + EmbedClasses.embedMargin}>{rendered}</div>
+  ) : (
+    <div className={EmbedClasses.embedDescription + " " + EmbedClasses.embedMargin}>
+      {expanded ? rendered : <div className="betterEmbedsYT-description-firstLine">{firstLine}</div>}
+      <Clickable className="betterEmbedsYT-description-button" onClick={() => setExpanded(!expanded)}>
+        {expanded ? "Show less" : "Show more"}
+      </Clickable>
+    </div>
+  );
+}
+
+export default function DescriptionWrapper({
+  embed,
+  renderDescription
+}: {
+  embed: { rawDescription?: string; video: { url: string } };
+  renderDescription: RenderDescription;
+}) {
+  const videoId = embed.video.url.split("/embed/").pop()!;
+  return embed.rawDescription == null ? null : (
+    <YTDescription description={embed.rawDescription} renderDescription={renderDescription} videoId={videoId} />
+  );
+}