Session 3: Radarr/Sonarr/Lidarr clients with add-on-search

Adds internal/arr with a shared HTTP layer and per-service clients that
look up candidates and POST the chosen one back with monitored=true and
search-on-add enabled. Lidarr requires metadata_profile_id, now part of
ArrConfig and validated when lidarr is set.

internal/arr/sonarr.go

@@ -0,0 +1,55 @@
+package arr
+
+import (
+	"context"
+	"fmt"
+
+	"bellhop/internal/config"
+)
+
+// Sonarr drives a Sonarr v3/v4 instance.
+type Sonarr struct {
+	h                *httpClient
+	qualityProfileID int
+	rootFolder       string
+}
+
+func NewSonarr(cfg *config.ArrConfig) *Sonarr {
+	return &Sonarr{
+		h:                newHTTP(cfg.URL, cfg.APIKey),
+		qualityProfileID: cfg.QualityProfileID,
+		rootFolder:       cfg.RootFolder,
+	}
+}
+
+func (s *Sonarr) Search(ctx context.Context, term string) ([]Result, error) {
+	body, err := s.h.get(ctx, "/api/v3/series/lookup", map[string]string{"term": term})
+	if err != nil {
+		return nil, err
+	}
+	return parseLookup(body, "title")
+}
+
+func (s *Sonarr) Add(ctx context.Context, res Result) error {
+	if len(res.raw) == 0 {
+		return fmt.Errorf("sonarr: empty result")
+	}
+	body, err := buildAddBody(res.raw, map[string]any{
+		"qualityProfileId": s.qualityProfileID,
+		"rootFolderPath":   s.rootFolder,
+		"monitored":        true,
+		"seasonFolder":     true,
+		"addOptions": map[string]any{
+			"monitor":                      "all",
+			"searchForMissingEpisodes":     true,
+			"searchForCutoffUnmetEpisodes": false,
+		},
+	})
+	if err != nil {
+		return err
+	}
+	_, err = s.h.post(ctx, "/api/v3/series", body)
+	return err
+}
+
+var _ Client = (*Sonarr)(nil)