node-string-similarity/dist/dbUtils.js

A TypeScript library for string similarity comparison

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.findSimilarEntries = findSimilarEntries;
exports.insertStringEntry = insertStringEntry;
exports.closeDatabaseConnection = closeDatabaseConnection;
exports.configureDatabase = configureDatabase;
const index_1 = require("./index");
const pg_1 = require("pg");
const pool = new pg_1.Pool({
    user: process.env.DB_USER || "default_user",
    host: process.env.DB_HOST || "localhost",
    database: process.env.DB_NAME || "default_database",
    password: process.env.DB_PASSWORD || "default_password",
    port: parseInt(process.env.DB_PORT || "5432", 10),
});
function findSimilarEntries(target, tableName, columnName, threshold) {
    return __awaiter(this, void 0, void 0, function* () {
        const client = yield pool.connect();
        try {
            const query = `SELECT id, ${columnName} FROM ${tableName}`;
            const result = yield client.query(query);
            const similarEntries = result.rows
                .map((row) => {
                const similarity = row[columnName]
                    ? (0, index_1.compareStrings)(target, row[columnName])
                    : 0;
                return { id: String(row.id), value: row[columnName], similarity };
            })
                .filter((entry) => entry.similarity >= threshold)
                .sort((a, b) => b.similarity - a.similarity);
            return similarEntries;
        }
        finally {
            client.release();
        }
    });
}
function insertStringEntry(tableName, columnName, value) {
    return __awaiter(this, void 0, void 0, function* () {
        const client = yield pool.connect();
        try {
            const query = `INSERT INTO ${tableName} (${columnName}) VALUES ($1)`;
            yield client.query(query, [value]);
        }
        finally {
            client.release();
        }
    });
}
function closeDatabaseConnection() {
    return __awaiter(this, void 0, void 0, function* () {
        yield pool.end();
    });
}
function configureDatabase(config) {
    pool.options = Object.assign(Object.assign({}, pool.options), config);
}