If I have an existing range:
1-10
11-50
Then I will enter a new range from 1 - 60, How could I detect that the new range to be added overlaps to the previous entries? And how can I get the available range? In this case the available range is from 51-60.
Does anyone here have a great idea on this?
Thanks for helping.
Here's my current code:
$saved = array(
array(
"start" => 1,
"end" => 10
),
array(
"start" => 10,
"end" => 50
)
);
$new_range = array(
"start" => 1,
"end" => 60
);
$usable_range = array();
$previous_from = 0;
$previous_to = 0;
foreach($saved as $value)
{
$range_start = 0;
$range_end = 0;
if($previous_from<$value['start'])
{
$previous_from = $value['start'];
}
if($previous_to<$value['end'])
{
$previous_to = $value['end'];
}
if($previous_from<=$new_range['start'])
{
if($previous_to<$new_range['end'])
{
$range_start = $previous_to+1;
$range_end = $new_range['end'];
$new_range['start'] = $range_start;
}
}
else if($previous_from>=$new_range['start'])
{
if($previous_to<$new_range['end'])
{
$range_start = $previous_to+1;
$range_end = $new_range['end'];
$new_range['start'] = $range_start;
}
}
$usable[] = array("range_start"=>$range_start,"range_end"=>$range_end);
}