joyful/internal/config/rules.go

96 lines
2.7 KiB
Go

package config
import (
"fmt"
"git.annabunches.net/annabunches/joyful/internal/mappingrules"
"github.com/holoplot/go-evdev"
)
func makeSimpleRule(ruleConfig RuleConfig, pDevs map[string]*evdev.InputDevice, vDevs map[string]*evdev.InputDevice) (mappingrules.MappingRule, error) {
input, err := makeRuleTarget(ruleConfig.Input, pDevs)
if err != nil {
return nil, err
}
output, err := makeRuleTarget(ruleConfig.Output, vDevs)
if err != nil {
return nil, err
}
return &mappingrules.SimpleMappingRule{
Input: input,
Output: output,
Name: ruleConfig.Name,
}, nil
}
func makeComboRule(ruleConfig RuleConfig, pDevs map[string]*evdev.InputDevice, vDevs map[string]*evdev.InputDevice) (mappingrules.MappingRule, error) {
inputs := make([]mappingrules.RuleTarget, 0)
for _, inputConfig := range ruleConfig.Inputs {
input, err := makeRuleTarget(inputConfig, pDevs)
if err != nil {
return nil, err
}
inputs = append(inputs, input)
}
output, err := makeRuleTarget(ruleConfig.Output, vDevs)
if err != nil {
return nil, err
}
return &mappingrules.ComboMappingRule{
Inputs: inputs,
Output: output,
Name: ruleConfig.Name,
}, nil
}
// makeInputRuleTarget takes an Input declaration from the YAML and returns a fully formed RuleTarget.
func makeRuleTarget(targetConfig RuleTargetConfig, devs map[string]*evdev.InputDevice) (mappingrules.RuleTarget, error) {
ruleTarget := mappingrules.RuleTarget{}
device, ok := devs[targetConfig.Device]
if !ok {
return mappingrules.RuleTarget{}, fmt.Errorf("couldn't build rule due to non-existent device '%s'", targetConfig.Device)
}
ruleTarget.Device = device
eventType, eventCode, err := decodeRuleTargetValues(targetConfig)
if err != nil {
return ruleTarget, err
}
ruleTarget.Type = eventType
ruleTarget.Code = eventCode
ruleTarget.Inverted = targetConfig.Inverted
ruleTarget.DeviceName = targetConfig.Device
return ruleTarget, nil
}
// decodeRuleTargetValues returns the appropriate evdev.EvType and evdev.EvCode values
// for a given RuleTargetConfig, converting the config file strings into appropriate constants
//
// Todo: support different formats for key specification
func decodeRuleTargetValues(target RuleTargetConfig) (evdev.EvType, evdev.EvCode, error) {
var eventType evdev.EvType
var eventCode evdev.EvCode
var ok bool
if target.Button != "" {
eventType = evdev.EV_KEY
eventCode, ok = evdev.KEYFromString[target.Button]
if !ok {
return 0, 0, fmt.Errorf("skipping rule due to invalid button code '%s'", target.Button)
}
} else if target.Axis != "" {
eventType = evdev.EV_ABS
eventCode, ok = evdev.ABSFromString[target.Axis]
if !ok {
return 0, 0, fmt.Errorf("skipping rule due to invalid axis code '%s'", target.Button)
}
}
return eventType, eventCode, nil
}