import Fuse from "fuse.js";
import type { IFuseOptions } from "fuse.js";
export type TaskIndexRecord = {
taskId: string;
name?: string;
description?: string;
comments?: string;
custom?: string;
listId?: string;
listName?: string;
spaceId?: string;
spaceName?: string;
status?: string;
priority?: string;
assignees?: { id: number; username?: string }[];
url: string;
updatedAt?: string;
};
export class TaskSearchIndex {
private fuse?: Fuse<TaskIndexRecord>;
private snapshotKey?: string;
private expiresAt = 0;
private size = 0;
constructor(private readonly loader: (scope?: unknown) => Promise<TaskIndexRecord[]>, private readonly ttlSeconds: number) {}
private makeKey(scope?: unknown): string {
return JSON.stringify(scope ?? {});
}
private fuseOptions(): IFuseOptions<TaskIndexRecord> {
return {
includeScore: true,
ignoreLocation: true,
threshold: 0.35,
keys: [
{ name: "name", weight: 2 },
{ name: "description", weight: 1.5 },
{ name: "comments", weight: 1.25 },
{ name: "custom", weight: 1.25 },
{ name: "status", weight: 0.5 },
{ name: "priority", weight: 0.4 },
{ name: "listName", weight: 0.6 },
{ name: "spaceName", weight: 0.6 }
]
};
}
async ensure(scope?: unknown): Promise<void> {
const key = this.makeKey(scope);
const now = Date.now();
if (this.fuse && this.snapshotKey === key && now < this.expiresAt) {
return;
}
const records = await this.loader(scope);
this.fuse = new Fuse(records, this.fuseOptions());
this.snapshotKey = key;
this.expiresAt = now + this.ttlSeconds * 1000;
this.size = records.length;
}
get count(): number {
return this.size;
}
search(q: string, limit: number): { item: TaskIndexRecord; score: number | null; matches?: { key: string }[] }[] {
if (!this.fuse) {
return [];
}
const results = this.fuse.search(q, { limit });
return results.map(entry => {
const matches = entry.matches
?.map(match => {
if (typeof match.key === "string") {
return { key: match.key };
}
return null;
})
.filter((value): value is { key: string } => value !== null);
return {
item: entry.item,
score: typeof entry.score === "number" ? entry.score : null,
matches
};
});
}
}
