new plugin Summaries: show Discords AI-generated convo summaries (#2481)

Co-authored-by: Vendicated <vendicated@riseup.net>

src/plugins/seeSummaries/README.md

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+# Summaries
+
+Enables Discord's experimental Summaries feature on every server, displaying AI generated summaries of conversations.
+
+Note that this plugin can't fetch old summaries, it can only display ones created while your Discord is running with the plugin enabled.
+
+![](https://github.com/Vendicated/Vencord/assets/45497981/bd931b0c-2e85-4c10-9f7c-8ba01eb55745)

src/plugins/seeSummaries/index.tsx

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+/*
+ * Vencord, a Discord client mod
+ * Copyright (c) 2024 Vendicated and contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import { DataStore } from "@api/index";
+import { definePluginSettings } from "@api/Settings";
+import { Devs } from "@utils/constants";
+import definePlugin, { OptionType } from "@utils/types";
+import { findByPropsLazy } from "@webpack";
+import { ChannelStore, GuildStore } from "@webpack/common";
+
+const SummaryStore = findByPropsLazy("allSummaries", "findSummary");
+const { createSummaryFromServer } = findByPropsLazy("createSummaryFromServer");
+
+const settings = definePluginSettings({
+    summaryExpiryThresholdDays: {
+        type: OptionType.SLIDER,
+        description: "The time in days before a summary is removed. Note that only up to 50 summaries are kept per channel",
+        markers: [1, 3, 5, 7, 10, 15, 20, 25, 30],
+        stickToMarkers: false,
+        default: 3,
+    }
+});
+
+interface Summary {
+    count: number;
+    end_id: string;
+    id: string;
+    message_ids: string[];
+    people: string[];
+    source: number;
+    start_id: string;
+    summ_short: string;
+    topic: string;
+    type: number;
+    unsafe: boolean;
+}
+
+interface ChannelSummaries {
+    type: string;
+    channel_id: string;
+    guild_id: string;
+    summaries: Summary[];
+
+    // custom property
+    time?: number;
+}
+
+export default definePlugin({
+    name: "Summaries",
+    description: "Enables Discord's experimental Summaries feature on every server, displaying AI generated summaries of conversations",
+    authors: [Devs.mantikafasi],
+    settings,
+    patches: [
+        {
+            find: "ChannelTypesSets.SUMMARIZEABLE.has",
+            replacement: {
+                match: /\i\.hasFeature\(\i\.GuildFeatures\.SUMMARIES_ENABLED\w+?\)/g,
+                replace: "true"
+            }
+        },
+        {
+            find: "RECEIVE_CHANNEL_SUMMARY(",
+            replacement: {
+                match: /shouldFetch\((\i),\i\){/,
+                replace: "$& if(!$self.shouldFetch($1)) return false;"
+            }
+        }
+    ],
+    flux: {
+        CONVERSATION_SUMMARY_UPDATE(data) {
+            const incomingSummaries: ChannelSummaries[] = data.summaries.map((summary: any) => ({ ...createSummaryFromServer(summary), time: Date.now() }));
+
+            // idk if this is good for performance but it doesnt seem to be a problem in my experience
+            DataStore.update("summaries-data", summaries => {
+                summaries ??= {};
+                summaries[data.channel_id] ? summaries[data.channel_id].unshift(...incomingSummaries) : (summaries[data.channel_id] = incomingSummaries);
+                if (summaries[data.channel_id].length > 50)
+                    summaries[data.channel_id] = summaries[data.channel_id].slice(0, 50);
+
+                return summaries;
+            });
+        }
+    },
+
+    async start() {
+        await DataStore.update("summaries-data", summaries => {
+            for (const key of Object.keys(summaries)) {
+                for (let i = summaries[key].length - 1; i >= 0; i--) {
+                    if (summaries[key][i].time < Date.now() - 1000 * 60 * 60 * 24 * settings.store.summaryExpiryThresholdDays) {
+                        summaries[key].splice(i, 1);
+                    }
+                }
+
+                if (summaries[key].length === 0) {
+                    delete summaries[key];
+                }
+            }
+
+            Object.assign(SummaryStore.allSummaries(), summaries);
+            return summaries;
+        });
+    },
+
+    shouldFetch(channelId: string) {
+        const channel = ChannelStore.getChannel(channelId);
+        // SUMMARIES_ENABLED feature is not in discord-types
+        const guild = GuildStore.getGuild(channel.guild_id);
+        // @ts-ignore
+        return guild.hasFeature("SUMMARIES_ENABLED_GA");
+    }
+});