107 lines
2.8 KiB
TypeScript
107 lines
2.8 KiB
TypeScript
import { by_character, by_lurid } from '@andyburke/fsdb/organizers';
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import { FSDB_COLLECTION } from '@andyburke/fsdb';
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import { FSDB_INDEXER_SYMLINKS } from '@andyburke/fsdb/indexers';
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/**
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* @typedef {object} TIMESTAMPS
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* @property {string} created when the event was created
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* @property {string} updated when the event was last updated
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*/
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/**
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* Event
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*
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* @property {string} id - lurid
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* @property {string} creator_id - id of the source user
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* @property {string} type - event type
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* @property {string} [parent_id] - optional parent event id
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* @property {string[]} [tags] - optional event tags
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* @property {Record<string,any>} [data] - optional data payload of the event
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* @property {TIMESTAMPS} timestamps - timestamps that will be set by the server
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*/
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export type EVENT = {
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id: string;
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creator_id: string;
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type: string;
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parent_id?: string;
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tags?: string[];
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data?: Record<string, any>;
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timestamps: {
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created: string;
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updated: string;
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};
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};
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type TOPIC_EVENT_CACHE_ENTRY = {
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collection: FSDB_COLLECTION<EVENT>;
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eviction_timeout: number;
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};
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const TOPIC_EVENT_ID_MATCHER = /^(?<event_type>.*):(?<event_id>.*)$/;
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const TOPIC_EVENTS: Record<string, TOPIC_EVENT_CACHE_ENTRY> = {};
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export function get_events_collection_for_topic(topic_id: string): FSDB_COLLECTION<EVENT> {
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TOPIC_EVENTS[topic_id] = TOPIC_EVENTS[topic_id] ?? {
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collection: new FSDB_COLLECTION<EVENT>({
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name: `topics/${topic_id.slice(0, 14)}/${topic_id.slice(0, 34)}/${topic_id}/events`,
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id_field: 'id',
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organize: (id) => {
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TOPIC_EVENT_ID_MATCHER.lastIndex = 0;
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const {
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groups: {
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event_type,
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event_id
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}
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} = TOPIC_EVENT_ID_MATCHER.exec(id ?? '') ?? {
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groups: {}
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};
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return [
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event_type,
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event_id.slice(0, 14),
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event_id.slice(0, 34),
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event_id,
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`${event_id}.json`
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];
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},
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indexers: {
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creator_id: new FSDB_INDEXER_SYMLINKS<EVENT>({
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name: 'creator_id',
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field: 'creator_id',
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to_many: true,
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organize: by_lurid
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}),
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tags: new FSDB_INDEXER_SYMLINKS<EVENT>({
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name: 'tags',
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get_values_to_index: (event: EVENT): string[] => {
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return (event.tags ?? []).map((tag: string) => tag.toLowerCase());
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},
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to_many: true,
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organize: by_character
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})
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}
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}),
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eviction_timeout: 0
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};
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if (TOPIC_EVENTS[topic_id].eviction_timeout) {
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clearTimeout(TOPIC_EVENTS[topic_id].eviction_timeout);
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}
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TOPIC_EVENTS[topic_id].eviction_timeout = setTimeout(() => {
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delete TOPIC_EVENTS[topic_id];
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}, 60_000 * 5);
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return TOPIC_EVENTS[topic_id].collection;
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}
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export function clear_topic_events_cache() {
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for (const [topic_id, cached] of Object.entries(TOPIC_EVENTS)) {
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if (cached.eviction_timeout) {
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clearTimeout(cached.eviction_timeout);
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}
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delete TOPIC_EVENTS[topic_id];
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}
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}
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