connect two different database in one laravel 5.5 - php

Question

I want to minimize this by removing if else statement using simple code in laravel 5.5 can someone help me with it?
public function shirts($type='')
{
if($type == 'glass') {
$shirt = Product::where('category_id','1')->get();
$products = Category::find(1);
} elseif ($type == 'ic') {
$shirt = Product::where('category_id','2')->get();
$products = Category::find(2);
} elseif ($type == 'cover') {
$shirt = Product::where('category_id','3')->get();
$products = Category::findOrFail(3);
} else {
$shirt = Product::all();
}
return view('front.shirt',compact('products','shirt'));
}

Answer 1

One way would be to create a mappings for your type and comparing the type with the mappings.
public function shirts($type = '')
{
$type_mappings = [
'glass' => 1,
'ic' => 2,
'cover' => 3
];
if(array_key_exists($type, $type_mappings)) {
$shirt = Product::where('category_id', $type_mappings[$type])->get();
$products = Category::find($type_mappings[$type]);
} else {
$shirt = Product::all();
$products = null;
}
return view('front.shirt', compact('products', 'shirt'));
}

Answer 2

Edit : i assumed you want to avoid if else not as what the title of question says if still i am unclear please add comment so i can update the answer Thanks!
Lets handle it somewhere else as i guess your function only has the responsibility to find product based on id it get not mapping part so we can have something like :
// Your function with single responsibility to return product.
public function shirts($category = '')
{
$type = $this->CategoryIdMapper($category);
if($type == 0) {
$shirt = Product::all();
$products = null;
} else{
$shirt = Product::where('category_id',$type_id)->get();
$products = Category::findOrFail($type_id);
}
return view('front.shirt',compact('products','shirt'));
}
//let the mapping part be done by some independent function which you can later modify accordingly and independently.
public function CategoryIdMapper($category)
{
$categories = ['glass'=>1, 'ic'=> 2, 'cover' => 3 ];
if(array_key_exist($category,$categories))
{
return $categories[$category];
}
return 0;
}