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/lidarr_test.go

@@ -0,0 +1,69 @@
+package arr
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"bellhop/internal/config"
+)
+
+func TestLidarrSearch(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/v1/artist/lookup" {
+			t.Errorf("path = %q", r.URL.Path)
+		}
+		if r.URL.Query().Get("term") != "radiohead" {
+			t.Errorf("term = %q", r.URL.Query().Get("term"))
+		}
+		_, _ = io.WriteString(w, `[{"artistName":"Radiohead","foreignArtistId":"a74b1b7f-71a5-4011-9441-d0b5e4122711"}]`)
+	}))
+	defer srv.Close()
+
+	l := NewLidarr(&config.ArrConfig{URL: srv.URL, APIKey: "k", QualityProfileID: 2, MetadataProfileID: 1, RootFolder: "/music"})
+	results, err := l.Search(context.Background(), "radiohead")
+	if err != nil {
+		t.Fatalf("search: %v", err)
+	}
+	if len(results) != 1 || results[0].Title != "Radiohead" {
+		t.Fatalf("unexpected results: %+v", results)
+	}
+}
+
+func TestLidarrAdd(t *testing.T) {
+	var got map[string]any
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost || r.URL.Path != "/api/v1/artist" {
+			t.Errorf("unexpected %s %s", r.Method, r.URL.Path)
+		}
+		_ = json.NewDecoder(r.Body).Decode(&got)
+		w.WriteHeader(http.StatusCreated)
+	}))
+	defer srv.Close()
+
+	l := NewLidarr(&config.ArrConfig{URL: srv.URL, APIKey: "k", QualityProfileID: 2, MetadataProfileID: 1, RootFolder: "/music"})
+	res := makeResult("Radiohead", 0, `{"artistName":"Radiohead","foreignArtistId":"a74b1b7f-71a5-4011-9441-d0b5e4122711"}`)
+	if err := l.Add(context.Background(), res); err != nil {
+		t.Fatalf("add: %v", err)
+	}
+
+	if got["qualityProfileId"].(float64) != 2 {
+		t.Errorf("qualityProfileId = %v", got["qualityProfileId"])
+	}
+	if got["metadataProfileId"].(float64) != 1 {
+		t.Errorf("metadataProfileId = %v", got["metadataProfileId"])
+	}
+	if got["rootFolderPath"] != "/music" {
+		t.Errorf("rootFolderPath = %v", got["rootFolderPath"])
+	}
+	if got["foreignArtistId"] != "a74b1b7f-71a5-4011-9441-d0b5e4122711" {
+		t.Errorf("foreignArtistId not preserved: %v", got["foreignArtistId"])
+	}
+	opts := got["addOptions"].(map[string]any)
+	if opts["searchForMissingAlbums"] != true || opts["monitor"] != "all" {
+		t.Errorf("addOptions wrong: %v", opts)
+	}
+}