rrdtool.ts/dist/proc.js

RRDTool High Level library for Node.js written in TypeScript

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const debug = require("debug")("rrdtool:proc");
const child_process_1 = __importDefault(require("child_process"));
const util_1 = require("./util");
const exec = async (args) => new Promise((resolve, reject) => {
    debug(["rrdtool"].concat(args).join(" "));
    const stdout = [];
    const stderr = [];
    const p = child_process_1.default.spawn("rrdtool", args, { env: { LANG: "C" } });
    p.stdout.on("data", chunk => stdout.push(chunk));
    p.stderr.on("data", chunk => stderr.push(chunk));
    p.on("close", code => {
        if (code !== 0) {
            const str = Buffer.concat(stderr).toString();
            const err = new Error(str.replace(/^ERROR: /, ""));
            return reject(err);
        }
        return resolve(Buffer.concat(stdout).toString());
    });
});
const create = async (filename, definitions, o) => {
    const opts = [];
    // rrdtool dosen't allow inserting a value onto
    // the start date. Decrese it by one so we can do that.
    if (o === null || o === void 0 ? void 0 : o.start)
        opts.push(`--start ${o.start - 1}`);
    if (o === null || o === void 0 ? void 0 : o.step)
        opts.push(`--step ${o.step}`);
    if (!(o === null || o === void 0 ? void 0 : o.overwrite))
        opts.push("--no-overwrite");
    if (o === null || o === void 0 ? void 0 : o.templateFile)
        opts.push(`--template ${o.templateFile}`);
    if (o === null || o === void 0 ? void 0 : o.sourceFile)
        opts.push(`--source ${o.sourceFile}`);
    exec(["create", filename, ...opts, ...definitions]);
};
const dump = async (filename) => {
    // XXX: output file and --header?
    return exec(["dump", filename]);
};
const fetch = async (filename, cf, o) => {
    const opts = [];
    // rrdtool counts timestamp very strange, hence the -1
    if (o === null || o === void 0 ? void 0 : o.start)
        opts.push(`--start ${o.start - 1}`);
    if (o === null || o === void 0 ? void 0 : o.end)
        opts.push(`--end ${o.end - 1}`);
    if (o === null || o === void 0 ? void 0 : o.resolution)
        opts.push(`--resolution ${o.resolution}`);
    if (o === null || o === void 0 ? void 0 : o.alignStart)
        opts.push("--align-start");
    const data = await exec(["fetch", filename, cf, ...opts]);
    const rows = data.trim().split("\n");
    const header = rows[0].trim().split(/ +/);
    const parseRow = (row) => {
        const [t, d] = row.split(":");
        return {
            ts: Number(t),
            values: d.trim().split(/ +/).reduce((p, c, i) => {
                const n = Number(c);
                if (!Number.isNaN(n)) {
                    p[header[i]] = n;
                }
                return p;
            }, {}),
        };
    };
    return rows.slice(2).map(parseRow);
};
const info = async (filename) => {
    // XXX: --noflush?
    const str = await exec(["info", filename]);
    return (0, util_1.parseInfo)(str);
};
const last = async (filename) => {
    return Number(await exec(["last", filename]));
};
// XXX: lastUpdate
const update = async (filename, values, o) => {
    const template = [];
    const data = [(o === null || o === void 0 ? void 0 : o.timestamp) || "N"]; // XXX: "N" if no timestamp?
    for (const key of Object.keys(values)) {
        const v = values[key];
        if (v === undefined)
            continue;
        data.push(v);
        template.push(key);
    }
    const opts = ["--template", template.join(":")];
    if (o === null || o === void 0 ? void 0 : o.skipPastUpdates)
        opts.push(`--skip-past-updates`);
    exec([(o === null || o === void 0 ? void 0 : o.verbose) ? "updatev" : "update", filename, ...opts, data.join(":")]);
};
exports.default = {
    create,
    dump,
    fetch,
    info,
    last,
    update,
};