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Library providing common functionality for interacting with the Pylons ecosystem

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package tech.pylons.ipc

abstract class UILayer {
    protected abstract fun onAddUiHook(uiHook: Message.UiHook)
    protected abstract fun onConfirmUiHook(uiHook: Message.UiHook)
    protected abstract fun onRejectUiHook(uiHook: Message.UiHook)
    protected abstract fun onReleaseUiHook(uiHook: Message.UiHook)

    companion object {
        val uiHooks : MutableList = mutableListOf()

        var implementation : UILayer? = null

        fun SetImplentation(impl: UILayer) {
            implementation = impl
        }

        fun addUiHook(uiHook: Message.UiHook) : Message.UiHook {
            uiHooks.add(uiHook)
            implementation!!.onAddUiHook(uiHook)
            return uiHook
        }

        fun rejectUiHook(uiHook:Message.UiHook) : Message.UiHook {
            uiHook.reject()
            implementation!!.onRejectUiHook(uiHook)
            IPCLayer.implementation!!.onUiRejected(uiHook)
            releaseUiHook(uiHook)
            return uiHook
        }


        fun confirmUiHook(uiHook: Message.UiHook) : Message.UiHook {
            uiHook.confirm()
            implementation!!.onConfirmUiHook(uiHook)
            IPCLayer.implementation!!.onUiConfirmed(uiHook)

            //break the UILayer
            releaseUiHook(uiHook)
            return uiHook
        }

        fun releaseUiHook(uiHook: Message.UiHook) : Message.UiHook {
            uiHooks.remove(uiHook)
            uiHook.release()
            implementation!!.onReleaseUiHook(uiHook)
            IPCLayer.implementation!!.onUiReleased(uiHook)
            return uiHook
        }

        fun getUiHook(msg : Message) : Message.UiHook? {
            uiHooks.forEach {
                if (it.msg == msg) return it
            }
            return null
        }
    }
}