var globalDb = [];
var globalGroups = []
var globalCurrentGroup = ""

function Error(message)
{
	alert(message);
}

function Copy(id)
{
	var elem = document.getElementById(id);

	elem.select();
	document.execCommand("copy");
}

function AESEncrypt(source, phrase)
{
	var encryptedAES = CryptoJS.AES.encrypt(source, phrase);

	return encryptedAES.toString();
}

function AESDecrypt(source, phrase)
{
	var decryptedBytes = CryptoJS.AES.decrypt(source, phrase);

	return decryptedBytes.toString(CryptoJS.enc.Latin1);
}

function Decrypt(val)
{
	var phrase = document.getElementById("PassPhrase").value;

	return AESDecrypt(val, phrase);
}

function Encrypt(val)
{
	var phrase = document.getElementById("PassPhrase").value;

	return AESEncrypt(val, phrase);
}

function WebRequest(url, func, args)
{
	var f;

	for(f = 0; f < args.length; f += 2)
	{
		if (f == 0)
		{
			url += "?";
		}
		else
		{
			url += "&";
		}

		url += args[f] + "=";
		url += encodeURIComponent(args[f+1]);
	}

	var req = new XMLHttpRequest();

	req.addEventListener("load", func);
	req.open("GET", url);
	req.send();
}

function ArrayContains(haystack, needle)
{
	for(var f = 0; f < haystack.length; f++)
	{
		if (haystack[f] === needle)
		{
			return true;
		}
	}

	return false;
}

function IsEmpty(id)
{
	var elem = document.getElementById(id);

	return elem.value == "";
}

function LoadGroups(keep_selection)
{
	globalGroups = [];

	for(var f = 0; f < globalDb.length; f++)
	{
		var group = globalDb[f].group;

		if (!ArrayContains(globalGroups, group))
		{
			globalGroups.push(group);
		}
	}

	if (!keep_selection)
	{
		globalCurrentGroup = "";
	}

	if (!ArrayContains(globalGroups, globalCurrentGroup))
	{
		if (globalGroups.length > 0)
		{
			globalCurrentGroup = globalGroups[0];
		}
		else
		{
			globalCurrentGroup = "";
		}
	}

	var elem = document.getElementById("Group");

	while(elem.length > 0)
	{
		elem.remove(0);
	}

	for(var f = 0; f < globalGroups.length; f++)
	{
		var option = document.createElement("option");

		option.text = globalGroups[f];
		option.value = globalGroups[f];

		elem.add(option);
	}

	elem.value = globalCurrentGroup;
}

function AddTableInputCell(id, text, name, maxlen, classname, type, node)
{
	var td = document.createElement("td");
	var input = document.createElement("input");

	input.value = text;
	input.id = name + id;
	input.type = type;
	input.maxLength = maxlen;

	td.className = classname;

	td.appendChild(input);
	node.appendChild(td);
}

function AddSmallLink(node, text, func, id)
{
	var anchor = document.createElement("a");

	anchor.href = "#";
	anchor.onclick = func;
	anchor.text = text;
	anchor.className = "smalltext";
	anchor.dataset.pmId = id;

	node.appendChild(anchor);
}

function AddSmallLinkPrevNext(node, text, func, id, prev, next)
{
	var anchor = document.createElement("a");

	anchor.href = "#";
	anchor.onclick = func;
	anchor.text = text;
	anchor.className = "smalltext";
	anchor.dataset.pmId = id;
	anchor.dataset.pmPrevId = prev;
	anchor.dataset.pmNextId = next;

	node.appendChild(anchor);
}

function AddSmallLinkUpDown(node, text, down_func, up_func, id)
{
	var anchor = document.createElement("a");

	anchor.href = "#";
	anchor.onmousedown = down_func;
	anchor.onmouseup = up_func;
	anchor.text = text;
	anchor.className = "smalltext";
	anchor.dataset.pmId = id;

	node.appendChild(anchor);
}

function AddText(node, text)
{
	var t = document.createTextNode(text);
	node.appendChild(t);
}

function AddElement(node, elementname)
{
	var elem = document.createElement(elementname);

	node.appendChild(elem);
}

function AddRow(table, id, prev_id, next_id, desc, username, password, rowcount)
{
	var tr = document.createElement("tr");

	if ((rowcount % 2) == 1)
	{
		tr.className = "style1";
	}
	else
	{
		tr.className = "style2";
	}

	AddTableInputCell(id, desc, "Description", 1024, "description", "text", tr); 
	AddTableInputCell(id, username, "Username", 256, "username", "text", tr); 
	AddTableInputCell(id, password, "Password", 256,
						"password", "password", tr); 

	var td = document.createElement("td");

	td.className = "commands";

	if (id == -1)
	{
		AddSmallLink(td, "Add", DoAdd, id);
	}
	else
	{
		AddSmallLink(td, "Edit", DoEdit, id);
		AddText(td, "\u00a0");
		AddText(td, "\u00a0");
		AddSmallLink(td, "Delete", DoDelete, id);
		AddText(td, "\u00a0");
		AddText(td, "\u00a0");
		AddSmallLinkUpDown(td, "Show", DoShow, DoHide, id);

		if (next_id != -1 || prev_id != -1)
		{
			if (prev_id != -1)
			{
				AddText(td, "\u00a0");
				AddText(td, "\u00a0");
				AddSmallLinkPrevNext(td, "Up", DoUp, id, prev_id, next_id);
			}

			if (next_id != -1)
			{
				AddText(td, "\u00a0");
				AddText(td, "\u00a0");
				AddSmallLinkPrevNext(td, "Down", DoDown, id, prev_id, next_id);
			}
		}

		AddElement(td, "br");

		AddSmallLink(td, "Copy Username", DoCopyUsername, id);
		AddText(td, "\u00a0");
		AddText(td, "\u00a0");
		AddSmallLink(td, "Copy Password", DoCopyPassword, id);
	}

	tr.appendChild(td);

	table.appendChild(tr);
}

function GetGroupRows()
{
	var result = [];

	for(var f = 0; f < globalDb.length; f++)
	{
		if (globalDb[f].group == globalCurrentGroup)
		{
			result.push(globalDb[f]);
		}
	}

	return result;
}

function LoadTable()
{
	var table = document.getElementById("DataTable");

	table.innerHTML = "";

	var rowcount = 0;

	var rows = GetGroupRows();

	for(var f = 0; f < rows.length; f++)
	{
		var prevId = -1;
		var nextId = -1;

		if (f > 0)
		{
			prevId = rows[f-1].id;
		}

		if (f < rows.length - 1)
		{
			nextId = rows[f+1].id;
		}

		AddRow(table,
			   rows[f].id,
			   prevId,
			   nextId,
			   rows[f].description,
			   rows[f].username,
			   Decrypt(rows[f].password),
			   rowcount++);
	}

	AddRow(table, -1, -1, -1, "", "", "", rowcount++);
}

function RefreshDataAsync()
{
	globalDb = JSON.parse(this.responseText);
	LoadGroups(true);
	LoadTable();
}

function RefreshData()
{
	WebRequest("get.php", RefreshDataAsync, []);
}

function LoadInitialData()
{
	LoadGroups(false);
	LoadTable();
}

function DoLoadAsync()
{
	globalDb = JSON.parse(this.responseText);
	LoadInitialData();
}

function DoLoad()
{
	if (IsEmpty("PassPhrase"))
	{
		Error("Passphrase empty");
		return;
	}

	WebRequest("get.php", DoLoadAsync, []);
}

function DoSelectGroup()
{
	var elem = document.getElementById("Group");

	globalCurrentGroup = elem.value;
	document.getElementById("NewGroup").value = "";
	LoadTable();
}

function DoAddAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoAdd()
{
	if (IsEmpty("Group") && IsEmpty("NewGroup"))
	{
		Error("No groups defined -- please enter a group name");
		return;
	}

	var id = this.dataset.pmId;
	var description = document.getElementById("Description" + id).value;
	var username = document.getElementById("Username" + id).value;
	var password = document.getElementById("Password" + id).value;
	var group;

	if (description == "" || username == "" | password == "")
	{
		Error("Please enter the description, username and password");
		return;
	}

	if (!IsEmpty("NewGroup"))
	{
		group = document.getElementById("NewGroup").value;
		document.getElementById("NewGroup").value = "";
	}
	else
	{
		group = document.getElementById("Group").value;
	}

	WebRequest("add.php", DoAddAsync,
	[
		"description", description,
		"group", group,
		"username", username,
		"password", Encrypt(password)
	]
	);
}

function DoEditAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoEdit()
{
	var id = this.dataset.pmId;
	var description = document.getElementById("Description" + id).value;
	var username = document.getElementById("Username" + id).value;
	var password = document.getElementById("Password" + id).value;
	var group;

	if (description == "" || username == "" | password == "")
	{
		Error("Please enter the description, username and password");
		return;
	}

	if (!IsEmpty("NewGroup"))
	{
		group = document.getElementById("NewGroup").value;
		document.getElementById("NewGroup").value = "";
	}
	else
	{
		group = document.getElementById("Group").value;
	}

	WebRequest("edit.php", DoEditAsync,
	[
		"id", id,
		"description", description,
		"group", group,
		"username", username,
		"password", Encrypt(password)
	]
	);
}

function DoDeleteAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoDelete()
{
	var id = this.dataset.pmId;

	WebRequest("delete.php", DoDeleteAsync,
	[
		"id", id
	]
	);
}

function DoCopyUsername()
{
	var id = "Username" + this.dataset.pmId;
	Copy(id);
}

function DoCopyPassword()
{
	var id = "Password" + this.dataset.pmId;
	document.getElementById(id).type = "text";
	Copy(id);
	document.getElementById(id).type = "password";
}

function DoShow()
{
	var elem = document.getElementById("Password" + this.dataset.pmId);
	elem.type = "text";
}

function DoHide()
{
	var elem = document.getElementById("Password" + this.dataset.pmId);
	elem.type = "password";
}

function DoReorderAsync()
{
	var response = JSON.parse(this.responseText);

	if (response.error)
	{
		Error(response.error);
	}
	else
	{
		RefreshData();
	}
}

function DoUp()
{
	var id = this.dataset.pmId;
	var prev = this.dataset.pmPrevId;

	WebRequest("reorder.php", DoReorderAsync,
	[
		"from_id", id,
		"to_id", prev
	]
	);
}

function DoDown()
{
	var id = this.dataset.pmId;
	var next = this.dataset.pmNextId;

	WebRequest("reorder.php", DoReorderAsync,
	[
		"from_id", id,
		"to_id", next
	]
	);
}

// vim: sw=4 ts=4