* Calculate timeout for Follow-me
Need to calculate the timeout for Enterprise RG members that have extensions with follow-me.
The RG timeout should always take precedence over a follow-me timeout value. What we do is take the delay of the follow-me destination and subtract that from the ring group timeout to give us the total timeout of the destination.
Example:
RG 1: x1000 (Delay=0, Timeout=10)
RG 2: x2000 (Delay=10, Timeout=10)
x2000 has follow-me enabled
FM 1: x2000 (Delay=0, Timeout=15)
FM 2: x3000 (Delay=5, Timeout=20)
In this example we would want x2000 ring for 10 seconds and x3000 to ring for 5 seconds.
What if we changed this... FM 2: x3000 (Delay 15, Timeout=20)
In this example we wouldn't want x3000 to ring at all because it would start to ring after the RG timeout has expired. Our calculated value would be a negative value, -5. These negative values don't work as leg_timeouts in the dialstring, so we need to test for them.
* Update index.lua
* Update index.lua
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