Eric Rakestraw
0cc2862170
feedkit now contains a reusable core, while weatherfeeder is a concrete implementation that includes weather-specific functions.
50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
package sources
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import (
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"fmt"
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"strings"
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"gitea.maximumdirect.net/ejr/feedkit/config"
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)
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// Factory constructs a configured Source instance from config.
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//
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// This is how concrete daemons (weatherfeeder/newsfeeder/...) register their
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// domain-specific source drivers (Open-Meteo, NWS, RSS, etc.) while feedkit
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// remains domain-agnostic.
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type Factory func(cfg config.SourceConfig) (Source, error)
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type Registry struct {
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byDriver map[string]Factory
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}
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func NewRegistry() *Registry {
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return &Registry{byDriver: map[string]Factory{}}
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}
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// Register associates a driver name (e.g. "openmeteo_observation") with a factory.
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//
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// The driver string is the "lookup key" used by config.sources[].driver.
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func (r *Registry) Register(driver string, f Factory) {
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driver = strings.TrimSpace(driver)
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if driver == "" {
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// Panic is appropriate here: registering an empty driver is always a programmer error,
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// and it will lead to extremely confusing runtime behavior if allowed.
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panic("sources.Registry.Register: driver cannot be empty")
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}
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if f == nil {
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panic(fmt.Sprintf("sources.Registry.Register: factory cannot be nil (driver=%q)", driver))
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}
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r.byDriver[driver] = f
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}
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// Build constructs a Source from a SourceConfig by looking up cfg.Driver.
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func (r *Registry) Build(cfg config.SourceConfig) (Source, error) {
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f, ok := r.byDriver[cfg.Driver]
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if !ok {
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return nil, fmt.Errorf("unknown source driver: %q", cfg.Driver)
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}
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return f(cfg)
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}
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