// UpdateSettings persists all changes made to the local settings of
// all given pairs of relation and unit. Keys with empty values are
// considered a signal to delete these values.
func (u *UniterAPI) UpdateSettings(args params.RelationUnitsSettings) (params.ErrorResults, error) {
result := params.ErrorResults{
Results: make([]params.ErrorResult, len(args.RelationUnits)),
}
canAccess, err := u.accessUnit()
if err != nil {
return params.ErrorResults{}, err
}
for i, arg := range args.RelationUnits {
relUnit, err := u.getRelationUnit(canAccess, arg.Relation, arg.Unit)
if err == nil {
var settings *state.Settings
settings, err = relUnit.Settings()
if err == nil {
for k, v := range arg.Settings {
if v == "" {
settings.Delete(k)
} else {
settings.Set(k, v)
}
}
_, err = settings.Write()
}
}
result.Results[i].Error = common.ServerError(err)
}
return result, nil
}
// ReadSettings returns the local settings of each given set of
// relation/unit.
func (u *UniterAPI) ReadSettings(args params.RelationUnits) (params.RelationSettingsResults, error) {
result := params.RelationSettingsResults{
Results: make([]params.RelationSettingsResult, len(args.RelationUnits)),
}
canAccess, err := u.accessUnit()
if err != nil {
return params.RelationSettingsResults{}, err
}
for i, arg := range args.RelationUnits {
relUnit, err := u.getRelationUnit(canAccess, arg.Relation, arg.Unit)
if err == nil {
var settings *state.Settings
settings, err = relUnit.Settings()
if err == nil {
result.Results[i].Settings, err = convertRelationSettings(settings.Map())
}
}
result.Results[i].Error = common.ServerError(err)
}
return result, nil
}