49 lines
1.4 KiB
TypeScript
49 lines
1.4 KiB
TypeScript
import { AsyncSQLite } from "../../plugos/sqlite/async_sqlite.ts";
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import { SysCallMapping } from "../system.ts";
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export async function ensureFTSTable(
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db: AsyncSQLite,
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tableName: string,
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) {
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const result = await db.query(
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`SELECT name FROM sqlite_master WHERE type='table' AND name=?`,
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tableName,
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);
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if (result.length === 0) {
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await db.execute(
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`CREATE VIRTUAL TABLE ${tableName} USING fts5(key, value);`,
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);
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console.log(`Created fts5 table ${tableName}`);
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}
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}
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export function fullTextSearchSyscalls(
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db: AsyncSQLite,
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tableName: string,
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): SysCallMapping {
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return {
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"fulltext.index": async (_ctx, key: string, value: string) => {
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await db.execute(`DELETE FROM ${tableName} WHERE key = ?`, key);
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await db.execute(
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`INSERT INTO ${tableName} (key, value) VALUES (?, ?)`,
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key,
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value,
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);
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},
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"fulltext.delete": async (_ctx, key: string) => {
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await db.execute(`DELETE FROM ${tableName} WHERE key = ?`, key);
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},
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"fulltext.search": async (_ctx, phrase: string, limit: number) => {
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console.log("Got search query", phrase);
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return (
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await db.query(
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`SELECT key, rank FROM ${tableName} WHERE value MATCH ? ORDER BY key, rank LIMIT ?`,
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phrase,
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limit,
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)
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).map((item) => ({ name: item.key, rank: item.rank }));
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},
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};
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}
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