# Device Profile/Route Management Scripts

These scripts are tasked to select appropriate profiles and routes for each device.

## Hooks

Hooks triggered by changes in the graph
Hook name | File | Triggered by | Action
--- | --- | --- | ---
device/select-profile | select-profile.lua | device added or EnumProfiles changed | schedules a ‘select-profile’ event
device/select-route | select-routes.lua | device added or EnumRoute changed | updates the device info cache with the latest routes and schedules a ‘select-routes’ event, if needed
device/store-user-selected-profile | select-profile.lua | device Profile param changed | stores profile into the state file if it was selected by the user (profile.save == true)
device/store-or-restore-routes | select-routes.lua | device Route param changed | stores or restores Route selections based on the current state; may push a ‘select-routes’ event to update properties

Hooks for the select-profile event, in order of execution
Hook name | File | Description
--- | --- | ---
device/find-stored-profile | state-profile.lua | selects the profile that has been stored in the state file (user’s explicit selection)
device/find-best-profile | find-best-profile.lua | finds the best profile for a device based on profile priorities and availability
device/apply-profile | apply-profile.lua | applies the selected profile to the device

Hooks for the select-routes event, in order of execution
Hook name | File | Description
--- | --- | ---
device/find-stored-routes | state-routes.lua | restores routes selection for a newly selected profile
device/find-best-routes | find-best-routes.lua | finds the best routes based on availability and priority
device/apply-route-props | state-routes.lua | augments the selected routes to include properties stored in the state file (volume, channel map, codecs, …)”
device/apply-routes | apply-routes.lua | applies the selected routes to the device

## select-profile event

High priority event to select a profile for a given device. The event hooks must also apply the profile.

The event “subject” is the device (WpDevice) object.

This event has no special properties.

Exchanged event data
Name | Description
--- | ---
selected-profile | The selected profile to be set: Type: string, containing a JSON object The JSON object should contain the properties of the Profile param

## select-routes event

High priority event to select routes for a given profile. The event hooks must also apply the routes.

The event “subject” is the device (WpDevice) object.

Event Properties
Property name | Description
--- | ---
profile.changed | true if a new profile has been selected / false if only the available routes changed
profile.name | the active profile’s name
profile.active-device-ids | json array of integers containing the active device IDs for which to select routes

Exchanged event data
Name | Description
--- | ---
selected-routes | The selected routes to be set: Type: map<string, string> The keys are device IDs (as represented in EnumRoute) The values are JSON objects like this: { index: <a route index>, props: { <object with route props> } }