Version 1.0 (initial commit)

js/script.js

@@ -0,0 +1,108 @@
+// Some constants
+const upperCase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+const lowerCase = upperCase.toLowerCase();
+const numbers = "1234567890";
+const specialCharacters = "@#$%";
+const ambiguousCharacters = "{}[]()/\\'\"`~,;:.<>";
+const similarCharacters = "il1Lo0O";
+
+chrome.storage.sync.get({ showButton: true },
+	(settings) =>
+	{
+		if (settings.showButton)
+			InsertButtons();
+	}
+);
+
+// Adding button below every password field
+function InsertButtons()
+{
+	document.querySelectorAll("input[type=password]").forEach(i =>
+		{
+			let actionLink = document.createElement("a");
+
+			actionLink.innerText = chrome.i18n.getMessage("generate");
+			actionLink.style.margin = "5px";
+			actionLink.style.display = "block";
+
+			// Since anchor without 'href' attrubute isn't shown as a hyperlink and '#' link potentially can break some sites logic, we add empty JS function
+			actionLink.href = "javascript:void(0);";
+
+			actionLink.addEventListener("click", GeneratePassword);
+
+			i.insertAdjacentElement("afterend", actionLink);	// Adding button after a password field
+		});
+}
+
+function GeneratePassword(e)
+{
+	// Generating password
+	let availableCharacters = "";	// Set of available characters to generate a password from
+
+	chrome.storage.sync.get(
+		{
+			length: 16,
+			includeSymbols: true,
+			includeNumbers: true,
+			includeLowercase: true,
+			includeUppercase: true,
+			excludeSimilar: true,
+			excludeSpecial: true
+		},
+		(settings) =>
+		{
+			// Adding or excluding characters from the set
+			if (settings.includeSymbols)
+				availableCharacters += specialCharacters;
+			if (settings.includeNumbers)
+				availableCharacters += numbers;
+			if (settings.includeLowercase)
+				availableCharacters += lowerCase;
+			if (settings.includeUppercase)
+				availableCharacters += upperCase;
+			if (settings.excludeSimilar)
+				similarCharacters.split("").forEach(i => availableCharacters = availableCharacters.replace(i, ""));
+			if (settings.excludeSpecial === false)
+				availableCharacters += ambiguousCharacters;
+
+			if (availableCharacters.length < 1)
+			{
+				alert(chrome.i18n.getMessage("fail"));
+				return;
+			}
+
+			let password = "";
+			for (k = 0; k < settings.length; k++)
+				password += availableCharacters[GetRandomInt(0, availableCharacters.length)];	// Picking random characters
+
+			let field = e?.target.previousElementSibling;
+			// Creating a hidden field if called as standalone
+			if (!field)
+			{
+				field = document.createElement("input");
+				document.body.appendChild(field);
+			}
+
+			field.value = password;	// Setting generated password to the field
+
+			field.setAttribute("type", "text");	// Since we cannot copy text from a password field, we'll make it temporarly simple field
+
+			// Some JS clipboard copying stuff
+			field.select();
+			document.execCommand("copy");
+
+			// Setting field type back to 'password'
+			field.setAttribute("type", "password");
+
+			if (!e)
+				field.remove();
+
+			alert(chrome.i18n.getMessage("success"));
+		});
+}
+
+// See https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Math/random
+function GetRandomInt(min, max)
+{
+	return Math.floor(Math.random() * (max - min)) + min;
+}