ahnen
Version:
A set of javascript functions for interpreting ahnentafel numbers for genealogy.
117 lines (99 loc) • 2.88 kB
HTML
<html lang="en">
<Title>Ahnen Numbers Test</Title>
<script>
sex = function(ascendancyNum){
if(validNumber(ascendancyNum) == false){
return "error";
}
var gender = undefined;
if(ascendancyNum % 2 == 1) {
gender = 'female';
ascendancyNum -= 1;
} else {
gender = 'male';
}
return gender;
};
line = function (ascendancyNum){
if(validNumber(ascendancyNum) == false){
return "error";
}
var line = checkLine(ascendancyNum);
// If the number is already 1,2, or 3, no further calculations need to be run.
// Higher or missing numbers return as "undetermined"
if(line != 'undetermined') {
return line;
} else {
//If the number is odd, subtract 1, unless the number is 3 because that
// means the mother's line and that is as far as this should go.
//Otherwise it returns everyone as fathersLine
// The loop always returns 1,2,3 or undetermined
for(i = ascendancyNum; line == 'undetermined'; i /= 2) {
if(i % 2 == 1 && i != 3) {
i -= 1;
}
line = checkLine(i);
}
return line;
}
};
fullLine = function(ascendancyNum) {
if(validNumber(ascendancyNum) == false){
return "error";
}
var ascendancy = [];
var i = ascendancyNum;
//M = Mother, F = Father
//This loop calculates like the one in exports.line
do {
if(i % 2 == 1) {
ascendancy.splice(0,0,"M");
if(i > 3){
i -= 1;
}
} else if(i % 2 == 0){
ascendancy.splice(0,0,"F");
} else {
throw "The ascendancy path can only be generated for Ahnen numbers higher than 1.";
}
i /= 2;
}
while(i >= 2);
return ascendancy;
};
checkLine = function(ascendancyNum) {
switch(ascendancyNum) {
case 1:
return 'rootPerson';
case 2:
return 'fathersLine';
case 3:
return 'mothersLine';
default:
return 'undetermined';
}
};
validNumber = function(ascendancyNum){
if(Number.isInteger(ascendancyNum) === false || ascendancyNum <= 0){
return false;
} else {return true;}
};
</script>
<script>
function calculate(){
var number = parseInt(document.getElementById("number").value);
var returnText;
returnText = "Sex: " + sex(number) + "<br>";
returnText = returnText + "Line: " + line(number) + "<br>";
returnText = returnText + "Full Line: " + fullLine(number);
document.getElementById("results").innerHTML = returnText;
}
</script>
<body>
<p>Enter an ahnen number:</p>
<input id="number">
<button type="button" onclick="calculate()">Calculate</button>
<p id="results"></p>
</body>
</html>