@zombienet/orchestrator/dist/metrics/parseLine.js

ZombieNet aim to be a testing framework for substrate based blockchains, providing a simple cli tool that allow users to spawn and test ephemeral Substrate based networks

"use strict";
// extracted from https://github.com/yunyu/parse-prometheus-text-format
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseLine = parseLine;
const STATE_NAME = 0;
const STATE_STARTOFLABELNAME = 1;
const STATE_ENDOFNAME = 2;
const STATE_VALUE = 3;
const STATE_ENDOFLABELS = 4;
const STATE_LABELNAME = 5;
const STATE_LABELVALUEQUOTE = 6;
const STATE_LABELVALUEEQUALS = 7;
const STATE_LABELVALUE = 8;
const STATE_LABELVALUESLASH = 9;
const STATE_NEXTLABEL = 10;
const STATE_TIMESTAMP = 11;
function parseLine(line) {
    let name = "";
    let labelname = "";
    let labelvalue = "";
    let value = "";
    let timestamp = "";
    const labels = new Map();
    let state = STATE_NAME;
    for (let c = 0; c < line.length; ++c) {
        const char = line.charAt(c);
        if (state === STATE_NAME) {
            if (char === "{") {
                state = STATE_STARTOFLABELNAME;
            }
            else if (char === " " || char === "\t") {
                state = STATE_ENDOFNAME;
            }
            else {
                name += char;
            }
        }
        else if (state === STATE_ENDOFNAME) {
            if (char === " " || char === "\t") {
                // do nothing
            }
            else if (char === "{") {
                state = STATE_STARTOFLABELNAME;
            }
            else {
                value += char;
                state = STATE_VALUE;
            }
        }
        else if (state === STATE_STARTOFLABELNAME) {
            if (char === " " || char === "\t") {
                // do nothing
            }
            else if (char === "}") {
                state = STATE_ENDOFLABELS;
            }
            else {
                labelname += char;
                state = STATE_LABELNAME;
            }
        }
        else if (state === STATE_LABELNAME) {
            if (char === "=") {
                state = STATE_LABELVALUEQUOTE;
            }
            else if (char === "}") {
                state = STATE_ENDOFLABELS;
            }
            else if (char === " " || char === "\t") {
                state = STATE_LABELVALUEEQUALS;
            }
            else {
                labelname += char;
            }
        }
        else if (state === STATE_LABELVALUEEQUALS) {
            if (char === "=") {
                state = STATE_LABELVALUEQUOTE;
            }
            else if (char === " " || char === "\t") {
                // do nothing
            }
            else {
                throw new Error("Invalid line");
            }
        }
        else if (state === STATE_LABELVALUEQUOTE) {
            if (char === '"') {
                state = STATE_LABELVALUE;
            }
            else if (char === " " || char === "\t") {
                // do nothing
            }
            else {
                throw new Error("Invalid line");
            }
        }
        else if (state === STATE_LABELVALUE) {
            if (char === "\\") {
                state = STATE_LABELVALUESLASH;
            }
            else if (char === '"') {
                labels.set(labelname, labelvalue);
                labelname = "";
                labelvalue = "";
                state = STATE_NEXTLABEL;
            }
            else {
                labelvalue += char;
            }
        }
        else if (state === STATE_LABELVALUESLASH) {
            state = STATE_LABELVALUE;
            if (char === "\\") {
                labelvalue += "\\";
            }
            else if (char === "n") {
                labelvalue += "\n";
            }
            else if (char === '"') {
                labelvalue += '"';
            }
            else {
                labelvalue += `\\${char}`;
            }
        }
        else if (state === STATE_NEXTLABEL) {
            if (char === ",") {
                state = STATE_LABELNAME;
            }
            else if (char === "}") {
                state = STATE_ENDOFLABELS;
            }
            else if (char === " " || char === "\t") {
                // do nothing
            }
            else {
                throw new Error("Invalid line");
            }
        }
        else if (state === STATE_ENDOFLABELS) {
            if (char === " " || char === "\t") {
                // do nothing
            }
            else {
                value += char;
                state = STATE_VALUE;
            }
        }
        else if (state === STATE_VALUE) {
            if (char === " " || char === "\t") {
                state = STATE_TIMESTAMP;
            }
            else {
                value += char;
            }
        }
        else if (state === STATE_TIMESTAMP) {
            if (char === " " || char === "\t") {
                // do nothing
            }
            else {
                timestamp += char;
            }
        }
    }
    const ret = {
        name,
        value,
    };
    if (labels) {
        ret.labels = labels;
    }
    if (timestamp) {
        ret.timestamp_ms = timestamp;
    }
    return ret;
}