jQuery UI Autocomplete perform search on button click issues - jquery-ui

Question

I have a working UI Auto complete with jQuery. I wanted to change the way it worked. Instead of a new browser tab opening with the user selects a value from the list I wanted the user to first pick a value then click a search button to trigger the event.
It works but if you perform a search and then a second search it will trigger the previous URL and new URL at the same time. Also if you perform a search then click the search button without typing anything into the search input it triggers the previous search. Weird right? I'll add my code but I think a codepen example will help clarify what I mean.
The other issue I was having is I am trying to set up a custom alert if the value typed is not in the array but I get the invalid error message no matter what I type. I added that as well in the code. It is one of the if statements.
JS
var mySource = [
{
value: "Google",
url: "http://www.google.com"
},
{
value: "Yahoo",
url: "https://www.yahoo.com"
},
{
value: "Hotmail",
url: "https://hotmail.com"
},
{
value: "Reddit",
url: "https://www.reddit.com"
}
];
//Logic for ui-autocomplete
$(document).ready(function() {
$("input.autocomplete").autocomplete({
minLength: 2,
source: function(req, resp) {
var q = req.term;
var myResponse = [];
$.each(mySource, function(key, item) {
if (item.value.toLowerCase().indexOf(q) === 0) {
myResponse.push(item);
}
if (item.value.toUpperCase().indexOf(q) === 0) {
myResponse.push(item);
}
//Add if statement here to determine if what the user inputs is in the
// array
//and if not in the array give an error to #textAlert.
//Example
if (item.value.indexOf(q) != myResponse) {
$('#alertText').text("Invalid Search");
} else {
return false;
}
});
resp(myResponse);
},
select: function(event, ui) {
$('#appSearchBtn').one("click", function() {
window.open(ui.item.url);
$('#appsearch').val('');
return false;
});
}
});
});
//Input and ui text clears when clicked into
$(document).ready(function() {
var input = document.querySelector('#appsearch');
var ui = document.querySelector(".ui-helper-hidden-accessible");
input.onclick = function() {
input.value = '';
ui.textContent = '';
};
});
HTML
<p id="alertText"></p>
<div class="input-group">
<input type="text" id="appsearch" class="form-control autocomplete" placeholder="Application Search" />
<span class="input-group-btn">
<button class="btn btn-primary inputBtn" id="appSearchBtn" type="button">Search</button>
</span>
</div>
Here is a Code pen https://codepen.io/FrontN_Dev/pen/MEmMRz so you can see how it works. I also added how it should work and what the bugs are.
9/29/17 #0732
I resolved the issue with the event firing the same URL over and over but I still need help with the custom invalid search message that appears for every search even if the value is in the array.