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for you feed etc

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This commit is contained in:
Martti Malmi 2024-01-13 22:44:16 +02:00
parent 2ab2001014
commit 35ec58377c
18 changed files with 469 additions and 269 deletions
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3
packages/app/config/default.json
View File

@ -18,7 +18,8 @@
"notificationGraph": true,
"communityLeaders": true,
"nostrAddress": true,
"pushNotifications": true
"pushNotifications": true,
"forYouFeed": false
},
"signUp": {
"moderation": true,

8
packages/app/config/iris.json
View File

@ -16,7 +16,8 @@
"deck": true,
"zapPool": true,
"notificationGraph": false,
"communityLeaders": true
"communityLeaders": true,
"forYouFeed": true
},
"defaultPreferences": {
"hideMutedNotes": true
@ -45,7 +46,10 @@
"wss://relay.nostr.band/": { "read": true, "write": true },
"wss://relay.damus.io/": { "read": true, "write": true }
},
"chatChannels": [{ "type": "telegram", "value": "https://t.me/irismessenger" }],
"chatChannels": [
{ "type": "telegram", "value": "https://t.me/irismessenger" },
{ "type": "nip28", "value": "23286a4602ada10cc10200553bff62a110e8dc0eacddf73277395a89ddf26a09" }
],
"alby": {
"clientId": "5rYcHDrlDb",
"clientSecret": "QAI3QmgiaPH3BfTMzzFd"

1
packages/app/custom.d.ts vendored
View File

@ -61,6 +61,7 @@ declare const CONFIG: {
communityLeaders: boolean;
nostrAddress: boolean;
pushNotifications: boolean;
forYouFeed: boolean;
};
defaultPreferences: {
hideMutedNotes: boolean;

12
packages/app/src/Components/Feed/RootTabItems.tsx
View File

@ -5,6 +5,7 @@ import Icon from "@/Components/Icons/Icon";
import { Newest } from "@/Utils/Login";
export type RootTab =
| "for-you"
| "following"
| "followed-by-friends"
| "conversations"
@ -16,6 +17,17 @@ export type RootTab =
export function rootTabItems(base: string, pubKey: string | undefined, tags: Newest<Array<string>>) {
const menuItems = [
{
tab: "for-you",
path: `${base}/for-you`,
show: Boolean(pubKey) && CONFIG.features.forYouFeed,
element: (
<>
<Icon name="user-v2" />
<FormattedMessage defaultMessage="For you" id="xEjBS7" />
</>
),
},
{
tab: "following",
path: `${base}/notes`,

2
packages/app/src/Components/Feed/RootTabs.tsx
View File

@ -25,7 +25,7 @@ export function RootTabs({ base = "/" }: { base: string }) {
const defaultTab = pubKey ? preferences.defaultRootTab ?? `${base}/notes` : `${base}/trending/notes`;
const initialPathname = location.pathname === "/" ? defaultTab : location.pathname;
const initialRootType = menuItems.find(a => a.path === initialPathname)?.tab || "following";
const initialRootType = menuItems.find(a => a.path === initialPathname)?.tab || "for-you";
const [rootType, setRootType] = useState<RootTab>(initialRootType);

245
packages/app/src/Db/IndexedDB.ts
View File

@ -1,245 +0,0 @@
import LRUSet from "@snort/shared/src/LRUSet";
import { ReqFilter as Filter, TaggedNostrEvent } from "@snort/system";
import * as Comlink from "comlink";
import Dexie, { Table } from "dexie";
type Tag = {
id: string;
eventId: string;
type: string;
value: string;
};
type SaveQueueEntry = { event: TaggedNostrEvent; tags: Tag[] };
type Task = () => Promise<void>;
class IndexedDB extends Dexie {
events!: Table<TaggedNostrEvent>;
tags!: Table<Tag>;
private saveQueue: SaveQueueEntry[] = [];
private subscribedEventIds = new Set<string>();
private subscribedAuthors = new Set<string>();
private subscribedTags = new Set<string>();
private subscribedAuthorsAndKinds = new Set<string>();
private readQueue: Map<string, Task> = new Map();
private isProcessingQueue = false;
private seenEvents = new LRUSet(2000);
constructor() {
super("EventDB");
this.version(6).stores({
// TODO use multientry index for *tags
events: "++id, pubkey, kind, created_at, [pubkey+kind]",
tags: "&[type+value+eventId], [type+value], eventId",
});
this.startInterval();
}
private startInterval() {
const processQueue = async () => {
if (this.saveQueue.length > 0) {
try {
const eventsToSave: TaggedNostrEvent[] = [];
const tagsToSave: Tag[] = [];
for (const item of this.saveQueue) {
eventsToSave.push(item.event);
tagsToSave.push(...item.tags);
}
await this.events.bulkPut(eventsToSave);
await this.tags.bulkPut(tagsToSave);
} catch (e) {
console.error(e);
} finally {
this.saveQueue = [];
}
}
setTimeout(() => processQueue(), 3000);
};
setTimeout(() => processQueue(), 3000);
}
handleEvent(event: TaggedNostrEvent) {
if (this.seenEvents.has(event.id)) {
return;
}
this.seenEvents.add(event.id);
// maybe we don't want event.kind 3 tags
const tags =
event.kind === 3
? []
: event.tags
?.filter(tag => {
if (tag[0] === "d") {
return true;
}
if (tag[0] === "e") {
return true;
}
// we're only interested in p tags where we are mentioned
/*
if (tag[0] === "p") {
Key.isMine(tag[1])) { // TODO
return true;
}*/
return false;
})
.map(tag => ({
eventId: event.id,
type: tag[0],
value: tag[1],
})) || [];
this.saveQueue.push({ event, tags });
}
private async startReadQueue() {
if (!this.isProcessingQueue && this.readQueue.size > 0) {
this.isProcessingQueue = true;
for (const [key, task] of this.readQueue.entries()) {
this.readQueue.delete(key); // allow to re-queue right away
console.log("starting idb task", key);
console.time(key);
await task();
console.timeEnd(key);
}
this.isProcessingQueue = false;
}
}
private enqueueRead(key: string, task: () => Promise<void>) {
this.readQueue.set(key, task);
this.startReadQueue();
}
getByAuthors = async (callback: (event: TaggedNostrEvent) => void, limit?: number) => {
this.enqueueRead("getByAuthors", async () => {
const authors = [...this.subscribedAuthors];
this.subscribedAuthors.clear();
await this.events
.where("pubkey")
.anyOf(authors)
.limit(limit || 1000)
.each(callback);
});
};
getByEventIds = async (callback: (event: TaggedNostrEvent) => void) => {
this.enqueueRead("getByEventIds", async () => {
const ids = [...this.subscribedEventIds];
this.subscribedEventIds.clear();
await this.events.where("id").anyOf(ids).each(callback);
});
};
getByTags = async (callback: (event: TaggedNostrEvent) => void) => {
this.enqueueRead("getByTags", async () => {
const tagPairs = [...this.subscribedTags].map(tag => tag.split("|"));
this.subscribedTags.clear();
await this.tags
.where("[type+value]")
.anyOf(tagPairs)
.each(tag => this.subscribedEventIds.add(tag.eventId));
await this.getByEventIds(callback);
});
};
getByAuthorsAndKinds = async (callback: (event: TaggedNostrEvent) => void) => {
this.enqueueRead("authorsAndKinds", async () => {
const authorsAndKinds = [...this.subscribedAuthorsAndKinds];
this.subscribedAuthorsAndKinds.clear();
const pairs = authorsAndKinds.map(pair => {
const [author, kind] = pair.split("|");
return [author, parseInt(kind)];
});
await this.events.where("[pubkey+kind]").anyOf(pairs).each(callback);
});
};
async find(filter: Filter, callback: (event: TaggedNostrEvent) => void): Promise<void> {
if (!filter) return;
const filterString = JSON.stringify(filter);
if (this.readQueue.has(filterString)) {
return;
}
// make sure only 1 argument is passed
const cb = e => {
this.seenEvents.add(e.id);
if (filter.not?.ids?.includes(e.id)) {
console.log("skipping", e.id);
return;
}
callback(e);
};
let hasTags = false;
for (const key in filter) {
if (key.startsWith("#")) {
hasTags = true;
const tagName = key.slice(1); // Remove the hash to get the tag name
const values = filter[key];
if (Array.isArray(values)) {
for (const value of values) {
this.subscribedTags.add(tagName + "|" + value);
}
}
}
}
if (hasTags) {
await this.getByTags(cb);
return;
}
if (filter.ids?.length) {
filter.ids.forEach(id => this.subscribedEventIds.add(id));
await this.getByEventIds(cb);
return;
}
if (filter.authors?.length && filter.kinds?.length) {
const permutations = filter.authors.flatMap(author => filter.kinds!.map(kind => author + "|" + kind));
permutations.forEach(permutation => this.subscribedAuthorsAndKinds.add(permutation));
await this.getByAuthorsAndKinds(cb);
return;
}
if (filter.authors?.length) {
filter.authors.forEach(author => this.subscribedAuthors.add(author));
await this.getByAuthors(cb);
return;
}
let query = this.events;
if (filter.kinds) {
query = query.where("kind").anyOf(filter.kinds);
}
if (filter.search) {
const term = filter.search.replace(" sort:popular", "");
if (term === "") {
return;
}
const regexp = new RegExp(term, "i");
query = query.filter((event: Event) => event.content?.match(regexp));
}
if (filter.limit) {
query = query.limit(filter.limit);
}
// TODO test that the sort is actually working
this.enqueueRead(filterString, async () => {
await query.each(cb);
});
}
}
const db = new IndexedDB();
Comlink.expose(db);

107
packages/app/src/Db/getForYouFeed.ts Normal file
View File

@ -0,0 +1,107 @@
import { NostrEvent, parseZap } from "@snort/system";
import { Relay } from "@/Cache";
export async function getForYouFeed(pubkey: string): Promise<NostrEvent[]> {
console.time("For You feed generation time");
console.log("pubkey", pubkey);
// Get events reacted to by me
const myReactedEvents = await getMyReactedEventIds(pubkey);
console.log("my reacted events", myReactedEvents);
// Get others who reacted to the same events as me
const othersWhoReacted = await getOthersWhoReacted(myReactedEvents, pubkey);
// this tends to be small when the user has just logged in, we should maybe subscribe for more from relays
console.log("others who reacted", othersWhoReacted);
// Get event ids reacted to by those others
const reactedByOthers = await getEventIdsReactedByOthers(othersWhoReacted);
console.log("reacted by others", reactedByOthers);
// Get events reacted to by others that I haven't reacted to
const idsToFetch = Array.from(reactedByOthers).filter(id => !myReactedEvents.has(id));
console.log("ids to fetch", idsToFetch);
// Get full events in sorted order
const feed = await getFeedEvents(idsToFetch);
console.log("feed.length", feed.length);
console.timeEnd("For You feed generation time");
return feed;
}
async function getMyReactedEventIds(pubkey: string) {
const myReactedEventIds = new Set<string>();
const myEvents = await Relay.query([
"REQ",
"getMyReactedEventIds",
{
authors: [pubkey],
kinds: [1, 6, 7, 9735],
},
]);
myEvents.forEach(ev => {
const targetEventId = ev.kind === 9735 ? parseZap(ev).event?.id : ev.tags.find(tag => tag[0] === "e")?.[1];
if (targetEventId) {
myReactedEventIds.add(targetEventId);
}
});
return myReactedEventIds;
}
async function getOthersWhoReacted(myReactedEventIds: Set<string>, myPubkey: string) {
const othersWhoReacted = new Set<string>();
const otherReactions = await Relay.query([
"REQ",
"getOthersWhoReacted",
{
"#e": Array.from(myReactedEventIds),
},
]);
otherReactions.forEach(reaction => {
if (reaction.pubkey !== myPubkey) {
othersWhoReacted.add(reaction.pubkey);
}
});
return [...othersWhoReacted];
}
async function getEventIdsReactedByOthers(othersWhoReacted: string[]) {
const eventIdsReactedByOthers = new Set<string>();
const events = await Relay.query([
"REQ",
"getEventIdsReactedByOthers",
{
authors: othersWhoReacted,
},
]);
events.forEach(event => {
event.tags.forEach(tag => {
if (tag[0] === "e") eventIdsReactedByOthers.add(tag[1]);
});
});
return [...eventIdsReactedByOthers];
}
async function getFeedEvents(ids: string[]) {
return (await Relay.query([
"REQ",
"getFeedEvents",
{
ids,
kinds: [1],
},
])).filter((ev) => {
// no replies
return !ev.tags.some((tag) => tag[0] === "e");
}).sort((a, b) => b.created_at - a.created_at);
}

2
packages/app/src/Pages/Root/DefaultTab.tsx
View File

@ -6,7 +6,7 @@ export const DefaultTab = () => {
preferences: s.appData.item.preferences,
publicKey: s.publicKey,
}));
const tab = publicKey ? preferences.defaultRootTab ?? `notes` : `trending/notes`;
const tab = publicKey ? preferences.defaultRootTab ?? `for-you` : `trending/notes`;
const elm = RootTabRoutes.find(a => a.path === tab)?.element;
return elm;
};

98
packages/app/src/Pages/Root/ForYouTab.tsx Normal file
View File

@ -0,0 +1,98 @@
import { TaggedNostrEvent } from "@snort/system";
import { memo, useEffect, useMemo, useState } from "react";
import { FormattedMessage } from "react-intl";
import { Link } from "react-router-dom";
import { DisplayAs, DisplayAsSelector } from "@/Components/Feed/DisplayAsSelector";
import { TimelineRenderer } from "@/Components/Feed/TimelineRenderer";
import { TaskList } from "@/Components/Tasks/TaskList";
import { getForYouFeed } from "@/Db/getForYouFeed";
import useLogin from "@/Hooks/useLogin";
import messages from "@/Pages/messages";
import { System } from "@/system";
const FollowsHint = () => {
const { publicKey: pubKey, follows } = useLogin();
if (follows.item?.length === 0 && pubKey) {
return (
<FormattedMessage
{...messages.NoFollows}
values={{
newUsersPage: (
<Link to={"/discover"}>
<FormattedMessage {...messages.NewUsers} />
</Link>
),
}}
/>
);
}
return null;
};
let forYouFeed = {
events: [] as TaggedNostrEvent[],
created_at: 0,
};
let getForYouFeedPromise: Promise<TaggedNostrEvent[]> | null = null;
export const ForYouTab = memo(function ForYouTab() {
const [notes, setNotes] = useState<TaggedNostrEvent[]>(forYouFeed.events);
const { feedDisplayAs } = useLogin();
const displayAsInitial = feedDisplayAs ?? "list";
const [displayAs, setDisplayAs] = useState<DisplayAs>(displayAsInitial);
const { publicKey } = useLogin();
const getFeed = () => {
if (!publicKey) {
return [];
}
if (!getForYouFeedPromise) {
getForYouFeedPromise = getForYouFeed(publicKey);
}
getForYouFeedPromise!.then(notes => {
console.log("for you feed", notes);
if (notes.length < 10) {
setTimeout(() => {
getForYouFeedPromise = null;
getForYouFeed();
}, 1000);
}
forYouFeed = {
events: notes,
created_at: Date.now(),
};
setNotes(notes);
notes.forEach(note => {
queueMicrotask(() => {
System.HandleEvent(note);
});
});
});
};
useEffect(() => {
if (forYouFeed.events.length < 10 || Date.now() - forYouFeed.created_at > 1000 * 60 * 1) {
getFeed();
}
}, []);
const frags = useMemo(() => {
return [
{
events: notes,
refTime: Date.now(),
},
];
}, [notes]);
return (
<>
<DisplayAsSelector activeSelection={displayAs} onSelect={a => setDisplayAs(a)} />
<FollowsHint />
<TaskList />
<TimelineRenderer frags={frags} latest={[]} displayAs={displayAs} />
</>
);
});

16
packages/app/src/Pages/Root/GlobalTab.tsx
View File

@ -4,7 +4,6 @@ import { useContext, useEffect, useMemo, useState } from "react";
import { FormattedMessage } from "react-intl";
import Timeline from "@/Components/Feed/Timeline";
import { TimelineSubject } from "@/Feed/TimelineFeed";
import useHistoryState from "@/Hooks/useHistoryState";
import useLogin from "@/Hooks/useLogin";
import { debounce, getRelayName, sha256 } from "@/Utils";
@ -81,14 +80,13 @@ export const GlobalTab = () => {
}, [relays, relay]);
const subject = useMemo(
() =>
({
type: "global",
items: [],
relay: [relay?.url],
discriminator: `all-${sha256(relay?.url ?? "")}`,
}) as TimelineSubject,
[relay?.url],
() => ({
type: "global",
items: [],
relay: [relay.url],
discriminator: `all-${sha256(relay.url)}`,
}),
[relay.url],
);
return (

5
packages/app/src/Pages/Root/RootTabRoutes.tsx
View File

@ -6,6 +6,7 @@ import HashTagsPage from "@/Pages/HashTagsPage";
import { ConversationsTab } from "@/Pages/Root/ConversationsTab";
import { DefaultTab } from "@/Pages/Root/DefaultTab";
import { FollowedByFriendsTab } from "@/Pages/Root/FollowedByFriendsTab";
import { ForYouTab } from "@/Pages/Root/ForYouTab";
import { GlobalTab } from "@/Pages/Root/GlobalTab";
import { NotesTab } from "@/Pages/Root/NotesTab";
import { TagsTab } from "@/Pages/Root/TagsTab";
@ -16,6 +17,10 @@ export const RootTabRoutes = [
path: "",
element: <DefaultTab />,
},
{
path: "for-you",
element: <ForYouTab />,
},
{
path: "global",
element: <GlobalTab />,

14
packages/app/src/Pages/SearchPage.tsx
View File

@ -7,7 +7,6 @@ import TabSelectors, { Tab } from "@/Components/TabSelectors/TabSelectors";
import TrendingNotes from "@/Components/Trending/TrendingPosts";
import TrendingUsers from "@/Components/Trending/TrendingUsers";
import FollowListBase from "@/Components/User/FollowListBase";
import { TimelineSubject } from "@/Feed/TimelineFeed";
import useProfileSearch from "@/Hooks/useProfileSearch";
import { debounce } from "@/Utils";
@ -54,13 +53,14 @@ const SearchPage = () => {
return debounce(500, () => setKeyword(search));
}, [search]);
const searchTimeline = useMemo(() => {
return {
const subject = useMemo(
() => ({
type: "post_keyword",
items: [keyword + (sortPopular ? " sort:popular" : "")],
discriminator: keyword,
items: [keyword],
} as TimelineSubject;
}, [keyword]);
}),
[keyword, sortPopular],
);
function tabContent() {
if (tab.value === PROFILES) {
@ -74,7 +74,7 @@ const SearchPage = () => {
return (
<>
{sortOptions()}
<Timeline subject={searchTimeline} postsOnly={false} method="LIMIT_UNTIL" />
<Timeline key={keyword} subject={subject} postsOnly={false} method={"LIMIT_UNTIL"} loadMore={false} />
</>
);
}

2
packages/app/src/Pages/TopicsPage.tsx
View File

@ -14,5 +14,5 @@ export function TopicsPage() {
[tags, pubKey],
);
return <Timeline subject={subject} postsOnly={true} method="TIME_RANGE" showLoadMore={true} window={60 * 60 * 6} />;
return <Timeline subject={subject} postsOnly={true} method="TIME_RANGE" window={60 * 60 * 6} />;
}

5
packages/app/src/Pages/settings/Preferences.tsx
View File

@ -84,6 +84,11 @@ const PreferencesPage = () => {
defaultRootTab: e.target.value,
} as UserPreferences)
}>
{CONFIG.features.forYouFeed && (
<option value="for-you">
<FormattedMessage defaultMessage="For you" id="xEjBS7" />
</option>
)}
<option value="notes">
<FormattedMessage defaultMessage="Notes" id="7+Domh" />
</option>

4
packages/app/src/Utils/Login/Preferences.ts
View File

@ -55,7 +55,7 @@ export interface UserPreferences {
/**
* Default page to select on load
*/
defaultRootTab: "notes" | "conversations" | "global";
defaultRootTab: "for-you" | "notes" | "conversations" | "global";
/**
* Default zap amount
@ -113,7 +113,7 @@ export const DefaultPreferences = {
autoShowLatest: false,
fileUploader: "void.cat",
imgProxyConfig: DefaultImgProxy,
defaultRootTab: "notes",
defaultRootTab: CONFIG.features.forYouFeed ? "for-you" : "notes",
defaultZapAmount: 50,
autoZap: false,
telemetry: true,

3
packages/app/src/lang.json
View File

@ -1706,6 +1706,9 @@
"x82IOl": {
"defaultMessage": "Mute"
},
"xEjBS7": {
"defaultMessage": "For you"
},
"xIcAOU": {
"defaultMessage": "Votes by {type}"
},

1
packages/app/src/translations/en.json
View File

@ -563,6 +563,7 @@
"wtLjP6": "Copy ID",
"x/Fx2P": "Fund the services that you use by splitting a portion of all your zaps into a pool of funds!",
"x82IOl": "Mute",
"xEjBS7": "For you",
"xIcAOU": "Votes by {type}",
"xIoGG9": "Go to",
"xQtL3v": "Unlock",

210
packages/system/src/InMemoryDB.ts Normal file
View File

@ -0,0 +1,210 @@
import { ID, ReqFilter as Filter, STR, TaggedNostrEvent, UID } from ".";
import loki from "lokijs";
import debug from "debug";
type PackedNostrEvent = {
id: UID;
pubkey: number;
kind: number;
tags: Array<string | UID>[];
flatTags: string[];
sig: string;
created_at: number;
content?: string;
relays: string[];
saved_at: number;
};
const DEFAULT_MAX_SIZE = 5000;
class InMemoryDB {
private loki = new loki("EventDB");
private eventsCollection: Collection<PackedNostrEvent>;
private maxSize: number;
constructor(maxSize = DEFAULT_MAX_SIZE) {
this.maxSize = maxSize;
this.eventsCollection = this.loki.addCollection("events", {
unique: ["id"],
indices: ["pubkey", "kind", "flatTags", "created_at", "saved_at"],
});
this.startRemoveOldestInterval();
}
private startRemoveOldestInterval() {
const removeOldest = () => {
this.removeOldest();
setTimeout(() => removeOldest(), 3000);
};
setTimeout(() => removeOldest(), 3000);
}
#log = debug("InMemoryDB");
get(id: string): TaggedNostrEvent | undefined {
const event = this.eventsCollection.by("id", ID(id)); // throw if db not ready yet?
if (event) {
return this.unpack(event);
}
}
has(id: string): boolean {
return !!this.eventsCollection.by("id", ID(id));
}
// map to internal UIDs to save memory
private pack(event: TaggedNostrEvent): PackedNostrEvent {
return {
id: ID(event.id),
pubkey: ID(event.pubkey),
sig: event.sig,
kind: event.kind,
tags: event.tags.map(tag => {
if (["e", "p"].includes(tag[0]) && typeof tag[1] === "string") {
return [tag[0], ID(tag[1] as string), ...tag.slice(2)];
} else {
return tag;
}
}),
flatTags: event.tags.filter(tag => ["e", "p", "d"].includes(tag[0])).map(tag => `${tag[0]}_${ID(tag[1])}`),
created_at: event.created_at,
content: event.content,
relays: event.relays,
saved_at: Date.now(),
};
}
private unpack(packedEvent: PackedNostrEvent): TaggedNostrEvent {
return <TaggedNostrEvent>{
id: STR(packedEvent.id),
pubkey: STR(packedEvent.pubkey),
sig: packedEvent.sig,
kind: packedEvent.kind,
tags: packedEvent.tags.map(tag => {
if (["e", "p"].includes(tag[0] as string) && typeof tag[1] === "number") {
return [tag[0], STR(tag[1] as number), ...tag.slice(2)];
} else {
return tag;
}
}),
created_at: packedEvent.created_at,
content: packedEvent.content,
relays: packedEvent.relays,
};
}
handleEvent(event: TaggedNostrEvent): boolean {
if (!event || !event.id || !event.created_at) {
throw new Error("Invalid event");
}
const id = ID(event.id);
if (this.eventsCollection.by("id", id)) {
return false; // this prevents updating event.relays?
}
const packed = this.pack(event);
// we might want to limit the kinds of events we save, e.g. no kind 0, 3 or only 1, 6
try {
this.eventsCollection.insert(packed);
} catch (e) {
return false;
}
return true;
}
remove(eventId: string): void {
const id = ID(eventId);
this.eventsCollection.findAndRemove({ id });
}
removeOldest(): void {
const count = this.eventsCollection.count();
this.#log("InMemoryDB: count", count, this.maxSize);
if (count > this.maxSize) {
this.#log("InMemoryDB: removing oldest events", count - this.maxSize);
this.eventsCollection
.chain()
.simplesort("saved_at")
.limit(count - this.maxSize)
.remove();
}
}
find(filter: Filter, callback: (event: TaggedNostrEvent) => void): void {
this.findArray(filter).forEach(event => {
callback(event);
});
}
findArray(filter: Filter): TaggedNostrEvent[] {
const query = this.constructQuery(filter);
const searchRegex = filter.search ? new RegExp(filter.search, "i") : undefined;
let chain = this.eventsCollection
.chain()
.find(query)
.where((e: PackedNostrEvent) => {
if (searchRegex && !e.content?.match(searchRegex)) {
return false;
}
return true;
})
.simplesort("created_at", true);
if (filter.limit) {
chain = chain.limit(filter.limit);
}
return chain.data().map(e => this.unpack(e));
}
findAndRemove(filter: Filter) {
const query = this.constructQuery(filter);
this.eventsCollection.findAndRemove(query);
}
private constructQuery(filter: Filter): LokiQuery<PackedNostrEvent> {
const query: LokiQuery<PackedNostrEvent> = {};
if (filter.ids) {
query.id = { $in: filter.ids.map(ID) };
} else {
if (filter.authors) {
query.pubkey = { $in: filter.authors.map(ID) };
}
if (filter.kinds) {
query.kind = { $in: filter.kinds };
}
if (filter["#e"]) {
query.flatTags = { $contains: "e_" + filter["#e"]!.map(ID) };
} else if (filter["#p"]) {
query.flatTags = { $contains: "p_" + filter["#p"]!.map(ID) };
} else if (filter["#d"]) {
query.flatTags = { $contains: "d_" + filter["#d"]!.map(ID) };
}
if (filter.since && filter.until) {
query.created_at = { $between: [filter.since, filter.until] };
}
if (filter.since) {
query.created_at = { $gte: filter.since };
}
if (filter.until) {
query.created_at = { $lte: filter.until };
}
}
return query;
}
findOne(filter: Filter): TaggedNostrEvent | undefined {
return this.findArray(filter)[0];
}
}
export { InMemoryDB };
export default new InMemoryDB();