@christiangalsterer/node-postgres-prometheus-exporter/dist/src/utils.js

A prometheus exporter for node-postgres

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.mergeLabelNamesWithStandardLabels = mergeLabelNamesWithStandardLabels;
exports.mergeLabelsWithStandardLabels = mergeLabelsWithStandardLabels;
exports.getMaxPoolSize = getMaxPoolSize;
exports.getHost = getHost;
exports.getPort = getPort;
exports.getDatabase = getDatabase;
/**
 * Merges an array of label names with the label names of the default labels into a new array.
 * @param labelNames array of label names to merge with the default labels
 * @param defaultLabels default labels to merge with
 * @returns array of merged label names
 */
function mergeLabelNamesWithStandardLabels(labelNames, defaultLabels = {}) {
    return labelNames.concat(Object.keys(defaultLabels));
}
/**
 * Merges Labels with default labels
 * @param labels labels to merge with the default labels
 * @param defaultLabels default labels to merge with
 * @returns merged labels
 */
function mergeLabelsWithStandardLabels(labels, defaultLabels = {}) {
    const filtered = Object.fromEntries(Object.entries(labels)
        .filter(([key, value]) => value !== undefined)
        .map(([key, value]) => [key, value]));
    return { ...filtered, ...defaultLabels };
}
/**
 * Tries to determine the max pool size from the pool via direct property access as the configuration is not exported
 * @param pool the pool from which to get the property
 * @returns the configured max pool size or undefined
 */
function getMaxPoolSize(pool) {
    return pool.options.max;
}
/**
 * Tries to determine the host configuration from the pool via direct property access as the configuration is not exported
 * @param pool the pool from which to get the property
 * @returns the configured host or undefined
 */
function getHost(pool) {
    return pool.options.host ?? undefined;
}
/**
 * Tries to determine the port configuration from the pool via direct property access as the configuration is not exported
 * @param pool the pool from which to get the property
 * @returns the configured port or 5432 if not set
 * @see https://node-postgres.com/api/pool#pool-connection-parameters
 */
function getPort(pool) {
    // eslint-disable-next-line @typescript-eslint/no-magic-numbers
    return pool.options.port ?? 5432;
}
/**
 * Tries to determine the database configuration from the pool via direct property access as the configuration is not exported
 * @param pool the pool from which to get the property
 * @returns the configured database or undefined
 */
function getDatabase(pool) {
    return pool.options.database;
}
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