replace switch case with assoc array

[alirezavalipour]

Summary

replace switch case with assoc array

Type of change

• replace switch case with assoc array, because it's less code lines and it's more understandable

[mfn]

👎 on the whole change, I don't think it improves anything and actually it makes the first default branch harder to read and to maintain, should the logic need to be improved:

The last line looks so forced without much gain.