Question

I need to assign channel for each schedule. There can be as many concurrent events as number of channels allocated for the customer. I.e if the customer is allocated 3 channels then he can have 3 concurrent events. If a channel was allocated to a event then the same channel cannot to allocated to another event that falls under same time but the same channel can be allocate to another event if the time differs.

Channel Table

ID Name
1  Name1
2  Name2
3  Name3

Event Table

ID EventName StartTime EndTime ChannelID
1  Event1    11:30AM   12PM    1
2  Event2    11:30AM   11:40AM 2
3  Event3    11:40AM   12PM    2
4  Event4    12PM      12:30PM 1 0r 2
5  Event5    11:30AM   12:30PM 3

The above is the expected output.

I tried nested foreachloop one for channel and other for evets, but was not able to achieve and the complexity is really high. How to achieve this logic?

Pseudo Code:

for each channel
{
    foreach existing events
    {
        if(sametime && same channel)
            {
             go for next channel
            }
        break;
    }
assign current channel to new event
}

This fail when I try to create 3rd event.

Answer 1

You can rather loop through events for assigning channels to event, check out below pseudo code:

foreach events 
{ 
    foreach channels 
    { 
        if currentChannel is assigned 
        { 
            foreach assignedEvents 
            { 
                if assignedTime = currentEventTime 
                    go to next Channel (continue)
            } 
            currentEvent.Channel = currentChannel 
            break;
        } 
        else 
        { 
            currentEvent.Channel = currentChannel 
            break;
        } 
    }
}