Reversewigo solver ✓🐵

Reversewigo solver ✓🐵 - solve reverse wherigo automatically on cache page. Solver code originated from Rick Rickhardson's reverse-wherigo source (public domain). Also, creates show source button for mystery cacahes.
Per 11-10-2020. Zie de nieuwste versie.
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// ==UserScript==
// @name        Reversewigo solver ✓🐵
// @namespace    http://tampermonkey.net/
// @version      0.05
// @description  Reversewigo solver ✓🐵  - solve reverse wherigo automatically on cache page. Solver code originated from Rick Rickhardson's reverse-wherigo source (public domain). Also, creates show source button for mystery cacahes.
// @author       [email protected]
// @include      https://www.geocaching.com/geocache/*
// ==/UserScript==

// placeholder for calculated reverse wherigo coordinates
// used by pollDOM to update them to popup dialog
// TODO: definitely not the best practise but a quick hack that seems to work (for now)
var newCoordinates = "";

async function dd2dm(lat, lon) {
    var lat = lat;
    var lon = lon;

    var latResult, lonResult, dmsResult;

    lat = parseFloat(lat);
    lon = parseFloat(lon);

    latResult = await lat_dd2dm(lat);
    lonResult = await lon_dd2dm(lon);

    // Joining both variables and separate them with a space.
    dmsResult = latResult + ' ' + lonResult;

    // Return the resultant string
    return { result: dmsResult, lat: latResult, lon: lonResult };
    }

    async function lat_dd2dm(val) {
    var valDeg, valMin, result;

    val = Number(val);
    result = (val >= 0)? 'N' : 'S';
    result += " ";

    val = Math.abs(val);
    valDeg = Math.floor(val);

    if( valDeg < 10 ) {
    result += "0" + valDeg;
    }
    else {
    result += valDeg;
    }
    result += "\xB0";
    result += " ";

    valMin = ((val - valDeg) * 60).toFixed(3);
    if( valMin < 10) {
        result += "0" + valMin;
    }
    else {
        result += valMin;
    }
    return result;
    }

    async function lon_dd2dm(val) {
    var valDeg, valMin, result;

    val = Number(val);

    result = (val >= 0)? 'E' : 'W';
    result += " ";

    val = Math.abs(val);
    valDeg = Math.floor(val);

    if( valDeg < 10 ) {
        result += "00" + valDeg;
    }
    else if( valDeg < 100) {
        result += "0" + valDeg;
    }
    else {
        result += valDeg;
    }
    result += "\xB0";
    result += " ";

    valMin = ((val - valDeg) * 60).toFixed(3);
    if( valMin < 10) {
        result += "0" + valMin;
    }
    else {
        result += valMin;
    }
    return result;
    }

    async function code2LatLon(varA, varB, varC) {
        let latSign, lonSign, lonValue, latValue;

        //
        if ((varA % 1000 - varA % 100) / 100 == 1) {
            latSign = 1;
            lonSign = 1;
        }
        else if ((varA % 1000 - varA % 100) / 100 == 2) {
            latSign = -1;
            lonSign = 1;
        }
        else if ((varA % 1000 - varA % 100) / 100 == 3) {
            latSign = 1;
            lonSign = -1;
        }
        else if ((varA % 1000 - varA % 100) / 100 == 4) {
            latSign = -1;
            lonSign = -1;
        }

        if ( ((varC % 100000 - varC % 10000) / 10000 + (varC % 100 - varC % 10) / 10) % 2 === 0) {
            // A4 B2  B5 C3 A6 C2 A1
            latValue = Number(((varA % 10000 - varA % 1000) / 1000 * 10 + (varB % 100 - varB % 10) / 10 + (varB % 100000 - varB % 10000) / 10000 * 0.1 + (varC % 1000 - varC % 100) / 100 * 0.01 + (varA % 1000000 - varA % 100000) / 100000 * 0.001 + (varC % 100 - varC % 10) / 10 * 1.0E-4 + varA % 10 * 1.0E-5));
        }
        else if ( ((varC % 100000 - varC % 10000) / 10000 + (varC % 100 - varC % 10) / 10) % 2 !== 0) {
            // B6 A1   A4 C6 C3 C2 A6
            latValue = Number(((varB % 1000000 - varB % 100000) / 100000 * 10 + varA % 10 + (varA % 10000 - varA % 1000) / 1000 * 0.1 + (varC % 1000000 - varC % 100000) / 100000 * 0.01 + (varC % 1000 - varC % 100) / 100 * 0.001 + (varC % 100 - varC % 10) / 10 * 1.0E-4 + (varA % 1000000 - varA % 100000) / 100000 * 1.0E-5))
        }

        if ( ((varC % 100000 - varC % 10000) / 10000 + (varC % 100 - varC % 10) / 10) % 2 === 0 ) {
            // A5 C6  C1 B3 B6 A2
            lonValue = Number(((varA % 100000 - varA % 10000) / 10000 * 100 + (varC % 1000000 - varC % 100000) / 100000 * 10 + varC % 10 + (varB % 1000 - varB % 100) / 100 * 0.1 + (varB % 1000000 - varB % 100000) / 100000 * 0.01 + (varA % 100 - varA % 10) / 10 * 0.001 + (varC % 100000 - varC % 10000) / 10000 * 1.0E-4 + varB % 10 * 1.0E-5));
        }
        else if ( ((varC % 100000 - varC % 10000) / 10000 + (varC % 100 - varC % 10) / 10) % 2 !== 0 ) {
            // B2 C1 A2  A5 B3 B1 ??
            lonValue = Number(((varB % 100 - varB % 10) / 10 * 100 + varC % 10 * 10 + (varA % 100 - varA % 10) / 10 + (varA % 100000 - varA % 10000) / 10000 * 0.1 + (varB % 1000 - varB % 100) / 100 * 0.01 + varB % 10 * 0.001 + (varC % 100000 - varC % 10000) / 10000 * 1.0E-4 + (varB % 100000 - varB % 10000) / 10000 * 1.0E-5));
        }

        latValue = latSign * latValue;
        lonValue = lonSign * lonValue;

        return { lat: latValue, lon: lonValue }
  }

  function fix(v, left, right) {
    return (v < 0 ? '-' : ' ') + Math.abs(v).toFixed(right).padStart(left + right + 1, '0');
  }

function createShowSourceButton() {
    let mybutton = document.createElement("button");
    mybutton.innerHTML = "Source";
    let noteref = document.getElementsByClassName("Note Disclaimer")[0]
    noteref.appendChild(mybutton);

    mybutton.addEventListener("click", function() {
        var desc1 = document.getElementById("ctl00_ContentBody_ShortDescription").innerHTML;
        var desc2 = document.getElementById("ctl00_ContentBody_LongDescription").innerHTML;
        alert( desc1 + desc2 )
    });
}


// TODO: definitely not the best practice, but works (for now)
function pollDOM() {
    const newCrd = document.getElementById('newCoordinates');
  
    if (newCrd != null) {
      // Do something with el
      newCrd.value = newCoordinates;

      let submitBtn = document.getElementsByClassName("btn-cc-parse")[0];
      submitBtn.click();
      } else {
      setTimeout(pollDOM, 300); // try again in 300 milliseconds
    }
} 

function updateCoordinates( newCoords ) {
    let crd = document.getElementById("uxLatLonLink");
    crd.click();

    newCoordinates = newCoords;

    pollDOM();
    console.log("XX: " + newCoords)
}

  (async function() {
    'use strict';
    let from, result;

    let cacheType = document.getElementsByClassName("cacheImage")[0].title;

    if( cacheType == "Mystery Cache") {
        createShowSourceButton();
    }

    if( cacheType == "Wherigo Cache" ) {
        let re = /[0-9]{6}/g;
        let codes = document.getElementsByClassName("UserSuppliedContent")[1].innerText.match( re );
        if( codes !== null && (codes.length == 3 || codes.length == 6 || codes.length == 9) ) {
            let ddlatlon = await code2LatLon( codes[0], codes[1], codes[2] );
            let dmlatlon = await dd2dm( ddlatlon.lat, ddlatlon.lon);
            from = codes[0] + " " + codes[1] + " " + codes[2] + " => ";
            let resultDD = fix(ddlatlon.lat, 2, 6) + " " + fix(ddlatlon.lon, 3, 6);
            let resultDMD = dmlatlon.lat + " " + dmlatlon.lon;
            result = resultDMD;
            console.log( from + " " + resultDD + " = " + resultDMD );
            document.getElementsByClassName("Note Disclaimer")[0].innerHTML = "<strong> Reversewigo final coordinates =  " + result + " </strong>";

            updateCoordinates( resultDMD );
        }
        else {
            result = "Error: Three reverse wherigo codes not found";
            console.log( result );
            document.getElementsByClassName("Note Disclaimer")[0].innerHTML = "<strong> Reversewigo final coordinates =  " + result + " </strong>";
        }    
    }
})();