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modularized random number generation logic

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This commit is contained in:
Alex Booker 2015-08-14 17:54:07 +01:00
parent b38eadd4ed
commit e13220c2fb
1 changed files with 31 additions and 25 deletions
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56
js/passwordGenerator.js
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@ -1,29 +1,35 @@
var passwordGenerator = (function() { var passwordGenerator = (function() {
return { var generateRandomNum = function (max) {
generatePassword: function (options) { return Math.floor(Math.random() * max);
var uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXTZ"; };
var lowercase = "abcdefghiklmnopqrstuvwxyz";
var numbers = "0123456789"; var generatePassword = function (options) {
var punct = ".,-/#!$%^&*;:{}=-_`~()]"; var uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXTZ";
var candidates = ''; var lowercase = "abcdefghiklmnopqrstuvwxyz";
if (options.includeUppercaseChars) { var numbers = "0123456789";
candidates += uppercase; var punct = ".,-/#!$%^&*;:{}=-_`~()]";
} var candidates = '';
if (options.includeLowercaseChars) { if (options.includeUppercaseChars) {
candidates += lowercase; candidates += uppercase;
}
if (options.includeNumbers) {
candidates += numbers;
}
if (options.includePunctuationChars) {
candidates += punct;
}
var result = "";
for (var i = 0; i < options.passwordLength; i++) {
var randomNum = Math.floor(Math.random() * candidates.length);
result += candidates.substring(randomNum, randomNum + 1);
}
return result;
} }
if (options.includeLowercaseChars) {
candidates += lowercase;
}
if (options.includeNumbers) {
candidates += numbers;
}
if (options.includePunctuationChars) {
candidates += punct;
}
var result = "";
for (var i = 0; i < options.passwordLength; i++) {
var randomNum = generateRandomNum(candidates.length);
result += candidates.substring(randomNum, randomNum + 1);
}
return result;
};
return {
generatePassword: generatePassword
}; };
})(); })();