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extension.go
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extension.go
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package sirius
type EID string
type Extension interface {
Run(Message, ExtensionConfig) (MessageAction, error)
}
type ExtensionLoader interface {
Load(EID) (Extension, error)
}
// ConfigExtension represents an extension with an associated configuration.
type ConfigExtension struct {
Extension
Cfg ExtensionConfig
}
func NewConfigExtension(ex Extension, cfg ExtensionConfig) *ConfigExtension {
return &ConfigExtension{
Extension: ex,
Cfg: cfg,
}
}
func FromConfiguration(l ExtensionLoader, cfg *Configuration) (*ConfigExtension, error) {
// Check for HTTP extensions
if cfg.URL != "" {
ex := NewHttpExtension(cfg.URL, nil)
return NewConfigExtension(ex, cfg.Cfg), nil
} else {
ex, err := l.Load(cfg.EID)
if err != nil {
return nil, err
}
return NewConfigExtension(ex, cfg.Cfg), nil
}
}
func (ex *ConfigExtension) Run(msg Message) (MessageAction, error) {
return ex.Extension.Run(msg, ex.Cfg)
}
func LoadFromSettings(l ExtensionLoader, s Profile) ([]ConfigExtension, error) {
var exe []ConfigExtension
for _, cfg := range s.Configurations {
x, err := FromConfiguration(l, &cfg)
if err != nil {
return nil, err
}
exe = append(exe, *x)
}
return exe, nil
}