@earvinpiamonte/pagasa-tcb-parser/dist/parsers/signal-parser.js

A TypeScript library for parsing PAGASA weather bulletin PDF files

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractSignalNumber = exports.extractSignalBlocks = exports.extractSignals = void 0;
const patterns_1 = require("../constants/patterns");
const area_parser_1 = require("./area-parser");
const extractSignals = (text) => {
    const signals = {};
    const tcwsMatch = text.match(patterns_1.PATTERNS.tcws);
    if (!tcwsMatch) {
        return signals;
    }
    const tcwsSection = tcwsMatch[1];
    const signalBlocks = (0, exports.extractSignalBlocks)(tcwsSection);
    for (const block of signalBlocks) {
        const signalNumber = (0, exports.extractSignalNumber)(block);
        if (signalNumber) {
            const regions = (0, area_parser_1.extractRegionsFromBlock)(block);
            signals[signalNumber] = {
                regions: {
                    luzon: regions.luzon,
                    visayas: regions.visayas,
                    mindanao: regions.mindanao,
                },
            };
        }
    }
    return signals;
};
exports.extractSignals = extractSignals;
const extractSignalBlocks = (tcwsSection) => {
    const blocks = [];
    const lines = tcwsSection.split("\n");
    let currentBlock = "";
    let inSignalBlock = false;
    for (const line of lines) {
        const trimmedLine = line.trim();
        if (patterns_1.PATTERNS.signalNumber.test(trimmedLine) ||
            trimmedLine.includes("TCWS No.")) {
            if (currentBlock && inSignalBlock) {
                blocks.push(currentBlock);
            }
            currentBlock = line + "\n";
            inSignalBlock = true;
        }
        else if (inSignalBlock) {
            currentBlock += line + "\n";
            if (trimmedLine.includes("OTHER HAZARDS") ||
                trimmedLine.includes("HAZARDS AFFECTING")) {
                break;
            }
        }
    }
    if (currentBlock && inSignalBlock) {
        blocks.push(currentBlock);
    }
    return blocks.filter((block) => block.trim().length > 0);
};
exports.extractSignalBlocks = extractSignalBlocks;
const extractSignalNumber = (block) => {
    const numberMatch = block.match(patterns_1.PATTERNS.signalMatch);
    if (numberMatch) {
        return numberMatch[1];
    }
    const tcwsMatch = block.match(patterns_1.PATTERNS.tcwsNumber);
    return tcwsMatch ? tcwsMatch[1] : null;
};
exports.extractSignalNumber = extractSignalNumber;
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