58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
import { SQLite } from "../../server/deps.ts";
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import { SysCallMapping } from "../system.ts";
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import { asyncExecute, asyncQuery } from "./store.deno.ts";
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type Item = {
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key: string;
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value: string;
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};
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export function ensureFTSTable(
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db: SQLite,
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tableName: string,
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) {
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// const stmt = db.prepare(
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// `SELECT name FROM sqlite_master WHERE type='table' AND name=?`,
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// );
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// const result = stmt.all(tableName);
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// if (result.length === 0) {
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// asyncExecute(
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// db,
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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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return Promise.resolve();
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}
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export function fullTextSearchSyscalls(
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db: SQLite,
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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 asyncExecute(db, `DELETE FROM ${tableName} WHERE key = ?`, key);
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await asyncExecute(
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db,
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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 asyncExecute(db, `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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return (
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await asyncQuery<any>(
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db,
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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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