feat: import interface

internal/adapters/importer/importer.go

@@ -0,0 +1,43 @@
+package importer
+
+import (
+	"context"
+	"fmt"
+	"github.com/abelith/spellbook/internal/models"
+	"io"
+	"sync"
+)
+
+type Importer interface {
+	Import(ctx context.Context, r io.Reader) (<-chan models.Spell, <-chan error, error)
+}
+
+var (
+	importers = make(map[string]Importer)
+	mu        sync.Mutex
+)
+
+func Register(name string, imp Importer) {
+	mu.Lock()
+	defer mu.Unlock()
+
+	if imp == nil {
+		panic("importer: Importer cannot be nil")
+	}
+	if _, ok := importers[name]; ok {
+		panic("importer: Register called twice for " + name)
+	}
+	importers[name] = imp
+}
+
+func Import(ctx context.Context, name string, r io.Reader) (<-chan models.Spell, <-chan error, error) {
+	mu.Lock()
+	imp, ok := importers[name]
+	mu.Unlock()
+
+	if !ok {
+		return nil, nil, fmt.Errorf("importer %s not found", name)
+	}
+
+	return imp.Import(ctx, r)
+}