coverart.go

@@ -0,0 +1,180 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/navidrome/navidrome/plugins/pdk/go/host"
+	"github.com/navidrome/navidrome/plugins/pdk/go/pdk"
+)
+
+// Configuration keys for image hosting
+const (
+	imageHostKey   = "imagehost"
+	imgbbApiKeyKey = "imgbbapikey"
+)
+
+// imgbb API response
+type imgbbResponse struct {
+	Data struct {
+		DisplayURL string `json:"display_url"`
+	} `json:"data"`
+	Success bool `json:"success"`
+}
+
+// uguu.se API response
+type uguuResponse struct {
+	Success bool `json:"success"`
+	Files   []struct {
+		URL string `json:"url"`
+	} `json:"files"`
+}
+
+// getImageURL retrieves the track artwork URL, optionally uploading to a public image host.
+func getImageURL(username, trackID string) string {
+	imageHost, _ := pdk.GetConfig(imageHostKey)
+
+	switch imageHost {
+	case "imgbb":
+		return getImageViaImgbb(username, trackID)
+	case "uguu":
+		return getImageViaUguu(username, trackID)
+	default:
+		return getImageDirect(trackID)
+	}
+}
+
+// getImageDirect returns the artwork URL directly from Navidrome (current behavior).
+func getImageDirect(trackID string) string {
+	artworkURL, err := host.ArtworkGetTrackUrl(trackID, 300)
+	if err != nil {
+		pdk.Log(pdk.LogWarn, fmt.Sprintf("Failed to get artwork URL: %v", err))
+		return ""
+	}
+
+	// Don't use localhost URLs
+	if strings.HasPrefix(artworkURL, "http://localhost") {
+		return ""
+	}
+	return artworkURL
+}
+
+// uploadFunc uploads image data to an external host and returns the public URL.
+type uploadFunc func(contentType string, data []byte) (string, error)
+
+// getImageViaHost fetches artwork and uploads it using the provided upload function.
+func getImageViaHost(provider, username, trackID string, cacheTTL int64, upload uploadFunc) string {
+	// Check cache first
+	cacheKey := fmt.Sprintf("%s.artwork.%s", provider, trackID)
+	cachedURL, exists, err := host.CacheGetString(cacheKey)
+	if err == nil && exists {
+		pdk.Log(pdk.LogDebug, fmt.Sprintf("Cache hit for %s artwork: %s", provider, trackID))
+		return cachedURL
+	}
+
+	// Fetch artwork data from Navidrome
+	contentType, data, err := host.SubsonicAPICallRaw(fmt.Sprintf("/getCoverArt?u=%s&id=%s&size=300", username, trackID))
+	if err != nil {
+		pdk.Log(pdk.LogWarn, fmt.Sprintf("Failed to fetch artwork data: %v", err))
+		return ""
+	}
+
+	// Upload to external host
+	url, err := upload(contentType, data)
+	if err != nil {
+		pdk.Log(pdk.LogWarn, fmt.Sprintf("Failed to upload to %s: %v", provider, err))
+		return ""
+	}
+
+	_ = host.CacheSetString(cacheKey, url, cacheTTL)
+	return url
+}
+
+// getImageViaImgbb fetches artwork and uploads it to imgbb.
+func getImageViaImgbb(username, trackID string) string {
+	apiKey, ok := pdk.GetConfig(imgbbApiKeyKey)
+	if !ok || apiKey == "" {
+		pdk.Log(pdk.LogWarn, "imgbb image host selected but no API key configured")
+		return ""
+	}
+
+	return getImageViaHost("imgbb", username, trackID, 82800, func(_ string, data []byte) (string, error) {
+		return uploadToImgbb(apiKey, data)
+	})
+}
+
+// getImageViaUguu fetches artwork and uploads it to uguu.se.
+func getImageViaUguu(username, trackID string) string {
+	return getImageViaHost("uguu", username, trackID, 9000, func(contentType string, data []byte) (string, error) {
+		return uploadToUguu(data, contentType)
+	})
+}
+
+// uploadToImgbb uploads image data to imgbb and returns the display URL.
+func uploadToImgbb(apiKey string, imageData []byte) (string, error) {
+	encoded := base64.StdEncoding.EncodeToString(imageData)
+	body := fmt.Sprintf("key=%s&image=%s&expiration=86400", apiKey, encoded)
+
+	req := pdk.NewHTTPRequest(pdk.MethodPost, "https://api.imgbb.com/1/upload")
+	req.SetHeader("Content-Type", "application/x-www-form-urlencoded")
+	req.SetBody([]byte(body))
+
+	resp := req.Send()
+	if resp.Status() >= 400 {
+		return "", fmt.Errorf("imgbb upload failed: HTTP %d", resp.Status())
+	}
+
+	var result imgbbResponse
+	if err := json.Unmarshal(resp.Body(), &result); err != nil {
+		return "", fmt.Errorf("failed to parse imgbb response: %w", err)
+	}
+
+	if !result.Success {
+		return "", fmt.Errorf("imgbb upload was not successful")
+	}
+
+	if result.Data.DisplayURL == "" {
+		return "", fmt.Errorf("imgbb returned empty display URL")
+	}
+
+	return result.Data.DisplayURL, nil
+}
+
+// uploadToUguu uploads image data to uguu.se and returns the file URL.
+func uploadToUguu(imageData []byte, contentType string) (string, error) {
+	// Build multipart/form-data body manually (TinyGo-compatible)
+	boundary := "----NavidromeCoverArt"
+	var body []byte
+	body = append(body, []byte(fmt.Sprintf("--%s\r\n", boundary))...)
+	body = append(body, []byte(fmt.Sprintf("Content-Disposition: form-data; name=\"files[]\"; filename=\"cover.jpg\"\r\n"))...)
+	body = append(body, []byte(fmt.Sprintf("Content-Type: %s\r\n", contentType))...)
+	body = append(body, []byte("\r\n")...)
+	body = append(body, imageData...)
+	body = append(body, []byte(fmt.Sprintf("\r\n--%s--\r\n", boundary))...)
+
+	req := pdk.NewHTTPRequest(pdk.MethodPost, "https://uguu.se/upload")
+	req.SetHeader("Content-Type", fmt.Sprintf("multipart/form-data; boundary=%s", boundary))
+	req.SetBody(body)
+
+	resp := req.Send()
+	if resp.Status() >= 400 {
+		return "", fmt.Errorf("uguu.se upload failed: HTTP %d", resp.Status())
+	}
+
+	var result uguuResponse
+	if err := json.Unmarshal(resp.Body(), &result); err != nil {
+		return "", fmt.Errorf("failed to parse uguu.se response: %w", err)
+	}
+
+	if !result.Success || len(result.Files) == 0 {
+		return "", fmt.Errorf("uguu.se upload was not successful")
+	}
+
+	if result.Files[0].URL == "" {
+		return "", fmt.Errorf("uguu.se returned empty URL")
+	}
+
+	return result.Files[0].URL, nil
+}

coverart_test.go

@@ -0,0 +1,177 @@
+package main
+
+import (
+	"errors"
+
+	"github.com/navidrome/navidrome/plugins/pdk/go/host"
+	"github.com/navidrome/navidrome/plugins/pdk/go/pdk"
+	"github.com/stretchr/testify/mock"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("getImageURL", func() {
+	BeforeEach(func() {
+		pdk.ResetMock()
+		host.CacheMock.ExpectedCalls = nil
+		host.CacheMock.Calls = nil
+		host.ArtworkMock.ExpectedCalls = nil
+		host.ArtworkMock.Calls = nil
+		host.SubsonicAPIMock.ExpectedCalls = nil
+		host.SubsonicAPIMock.Calls = nil
+		pdk.PDKMock.On("Log", mock.Anything, mock.Anything).Maybe()
+	})
+
+	Describe("no image host configured", func() {
+		BeforeEach(func() {
+			pdk.PDKMock.On("GetConfig", imageHostKey).Return("", false)
+		})
+
+		It("returns artwork URL directly", func() {
+			host.ArtworkMock.On("GetTrackUrl", "track1", int32(300)).Return("https://example.com/art.jpg", nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(Equal("https://example.com/art.jpg"))
+		})
+
+		It("returns empty for localhost URL", func() {
+			host.ArtworkMock.On("GetTrackUrl", "track1", int32(300)).Return("http://localhost:4533/art.jpg", nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+
+		It("returns empty when artwork fetch fails", func() {
+			host.ArtworkMock.On("GetTrackUrl", "track1", int32(300)).Return("", errors.New("not found"))
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+	})
+
+	Describe("imgbb image host", func() {
+		BeforeEach(func() {
+			pdk.PDKMock.On("GetConfig", imageHostKey).Return("imgbb", true)
+		})
+
+		It("returns cached URL when available", func() {
+			pdk.PDKMock.On("GetConfig", imgbbApiKeyKey).Return("test-api-key", true)
+			host.CacheMock.On("GetString", "imgbb.artwork.track1").Return("https://i.ibb.co/cached.jpg", true, nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(Equal("https://i.ibb.co/cached.jpg"))
+		})
+
+		It("uploads artwork and caches the result", func() {
+			pdk.PDKMock.On("GetConfig", imgbbApiKeyKey).Return("test-api-key", true)
+			host.CacheMock.On("GetString", "imgbb.artwork.track1").Return("", false, nil)
+
+			// Mock SubsonicAPICallRaw
+			imageData := []byte("fake-image-data")
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("image/jpeg", imageData, nil)
+
+			// Mock imgbb HTTP upload
+			imgbbReq := &pdk.HTTPRequest{}
+			pdk.PDKMock.On("NewHTTPRequest", pdk.MethodPost, "https://api.imgbb.com/1/upload").Return(imgbbReq)
+			pdk.PDKMock.On("Send", imgbbReq).Return(pdk.NewStubHTTPResponse(200, nil,
+				[]byte(`{"success":true,"data":{"display_url":"https://i.ibb.co/uploaded.jpg"}}`)))
+
+			// Mock cache set
+			host.CacheMock.On("SetString", "imgbb.artwork.track1", "https://i.ibb.co/uploaded.jpg", int64(82800)).Return(nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(Equal("https://i.ibb.co/uploaded.jpg"))
+			host.CacheMock.AssertCalled(GinkgoT(), "SetString", "imgbb.artwork.track1", "https://i.ibb.co/uploaded.jpg", int64(82800))
+		})
+
+		It("returns empty when no API key configured", func() {
+			pdk.PDKMock.On("GetConfig", imgbbApiKeyKey).Return("", false)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+
+		It("returns empty when artwork data fetch fails", func() {
+			pdk.PDKMock.On("GetConfig", imgbbApiKeyKey).Return("test-api-key", true)
+			host.CacheMock.On("GetString", "imgbb.artwork.track1").Return("", false, nil)
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("", []byte(nil), errors.New("fetch failed"))
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+
+		It("returns empty when imgbb upload fails", func() {
+			pdk.PDKMock.On("GetConfig", imgbbApiKeyKey).Return("test-api-key", true)
+			host.CacheMock.On("GetString", "imgbb.artwork.track1").Return("", false, nil)
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("image/jpeg", []byte("fake-image-data"), nil)
+
+			imgbbReq := &pdk.HTTPRequest{}
+			pdk.PDKMock.On("NewHTTPRequest", pdk.MethodPost, "https://api.imgbb.com/1/upload").Return(imgbbReq)
+			pdk.PDKMock.On("Send", imgbbReq).Return(pdk.NewStubHTTPResponse(500, nil, []byte(`{"success":false}`)))
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+	})
+
+	Describe("uguu image host", func() {
+		BeforeEach(func() {
+			pdk.PDKMock.On("GetConfig", imageHostKey).Return("uguu", true)
+		})
+
+		It("returns cached URL when available", func() {
+			host.CacheMock.On("GetString", "uguu.artwork.track1").Return("https://a.uguu.se/cached.jpg", true, nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(Equal("https://a.uguu.se/cached.jpg"))
+		})
+
+		It("uploads artwork and caches the result", func() {
+			host.CacheMock.On("GetString", "uguu.artwork.track1").Return("", false, nil)
+
+			// Mock SubsonicAPICallRaw
+			imageData := []byte("fake-image-data")
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("image/jpeg", imageData, nil)
+
+			// Mock uguu.se HTTP upload
+			uguuReq := &pdk.HTTPRequest{}
+			pdk.PDKMock.On("NewHTTPRequest", pdk.MethodPost, "https://uguu.se/upload").Return(uguuReq)
+			pdk.PDKMock.On("Send", uguuReq).Return(pdk.NewStubHTTPResponse(200, nil,
+				[]byte(`{"success":true,"files":[{"url":"https://a.uguu.se/uploaded.jpg"}]}`)))
+
+			// Mock cache set
+			host.CacheMock.On("SetString", "uguu.artwork.track1", "https://a.uguu.se/uploaded.jpg", int64(9000)).Return(nil)
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(Equal("https://a.uguu.se/uploaded.jpg"))
+			host.CacheMock.AssertCalled(GinkgoT(), "SetString", "uguu.artwork.track1", "https://a.uguu.se/uploaded.jpg", int64(9000))
+		})
+
+		It("returns empty when artwork data fetch fails", func() {
+			host.CacheMock.On("GetString", "uguu.artwork.track1").Return("", false, nil)
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("", []byte(nil), errors.New("fetch failed"))
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+
+		It("returns empty when uguu.se upload fails", func() {
+			host.CacheMock.On("GetString", "uguu.artwork.track1").Return("", false, nil)
+			host.SubsonicAPIMock.On("CallRaw", "/getCoverArt?u=testuser&id=track1&size=300").
+				Return("image/jpeg", []byte("fake-image-data"), nil)
+
+			uguuReq := &pdk.HTTPRequest{}
+			pdk.PDKMock.On("NewHTTPRequest", pdk.MethodPost, "https://uguu.se/upload").Return(uguuReq)
+			pdk.PDKMock.On("Send", uguuReq).Return(pdk.NewStubHTTPResponse(500, nil, []byte(`{"success":false}`)))
+
+			url := getImageURL("testuser", "track1")
+			Expect(url).To(BeEmpty())
+		})
+	})
+})

main.go

@@ -91,21 +91,6 @@ func getConfig() (clientID string, users map[string]string, err error) {
 	return clientID, users, nil
 }
 
-// getImageURL retrieves the track artwork URL.
-func getImageURL(trackID string) string {
-	artworkURL, err := host.ArtworkGetTrackUrl(trackID, 300)
-	if err != nil {
-		pdk.Log(pdk.LogWarn, fmt.Sprintf("Failed to get artwork URL: %v", err))
-		return ""
-	}
-
-	// Don't use localhost URLs
-	if strings.HasPrefix(artworkURL, "http://localhost") {
-		return ""
-	}
-	return artworkURL
-}
-
 // ============================================================================
 // Scrobbler Implementation
 // ============================================================================
@@ -163,7 +148,7 @@ func (p *discordPlugin) NowPlaying(input scrobbler.NowPlayingRequest) error {
 			End:   endTime,
 		},
 		Assets: activityAssets{
-			LargeImage: getImageURL(input.Track.ID),
+			LargeImage: getImageURL(input.Username, input.Track.ID),
 			LargeText:  input.Track.Album,
 		},
 	}); err != nil {

main_test.go

@@ -3,7 +3,6 @@ package main
 import (
 	"errors"
 	"strings"
-	"testing"
 
 	"github.com/navidrome/navidrome/plugins/pdk/go/host"
 	"github.com/navidrome/navidrome/plugins/pdk/go/pdk"
@@ -15,11 +14,6 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-func TestDiscordPlugin(t *testing.T) {
-	RegisterFailHandler(Fail)
-	RunSpecs(t, "Discord Plugin Main Suite")
-}
-
 var _ = Describe("discordPlugin", func() {
 	var plugin discordPlugin
 
@@ -36,6 +30,8 @@ var _ = Describe("discordPlugin", func() {
 		host.SchedulerMock.Calls = nil
 		host.ArtworkMock.ExpectedCalls = nil
 		host.ArtworkMock.Calls = nil
+		host.SubsonicAPIMock.ExpectedCalls = nil
+		host.SubsonicAPIMock.Calls = nil
 	})
 
 	Describe("getConfig", func() {
@@ -122,6 +118,7 @@ var _ = Describe("discordPlugin", func() {
 		It("successfully sends now playing update", func() {
 			pdk.PDKMock.On("GetConfig", clientIDKey).Return("test-client-id", true)
 			pdk.PDKMock.On("GetConfig", usersKey).Return(`[{"username":"testuser","token":"test-token"}]`, true)
+			pdk.PDKMock.On("GetConfig", imageHostKey).Return("", false)
 
 			// Connect mocks (isConnected check via heartbeat)
 			host.CacheMock.On("GetInt", "discord.seq.testuser").Return(int64(0), false, errors.New("not found"))

manifest.json

@@ -11,7 +11,7 @@
     },
     "http": {
       "reason": "To communicate with Discord API for gateway discovery and image uploads",
-      "requiredHosts": ["discord.com"]
+      "requiredHosts": ["discord.com", "api.imgbb.com", "uguu.se"]
     },
     "websocket": {
       "reason": "To maintain real-time connection with Discord gateway",
@@ -25,6 +25,9 @@
     },
     "artwork": {
       "reason": "To get track artwork URLs for rich presence display"
+    },
+    "subsonicapi": {
+      "reason": "To fetch track artwork data for image hosting upload"
     }
   },
   "config": {
@@ -39,6 +42,17 @@
           "maxLength": 20,
           "pattern": "^[0-9]+$"
         },
+        "imagehost": {
+          "type": "string",
+          "title": "Image Hosting Service",
+          "description": "Upload artwork to a public image host so Discord can display it. Required when Navidrome is not publicly accessible.",
+          "enum": ["imgbb", "uguu"]
+        },
+        "imgbbapikey": {
+          "type": "string",
+          "title": "imgbb API Key",
+          "description": "API key from imgbb.com. Get one at https://api.imgbb.com/"
+        },
         "users": {
           "type": "array",
           "title": "User Tokens",
@@ -73,6 +87,22 @@
           "type": "Control",
           "scope": "#/properties/clientid"
         },
+        {
+          "type": "Control",
+          "scope": "#/properties/imagehost"
+        },
+        {
+          "type": "Control",
+          "scope": "#/properties/imgbbapikey",
+          "options": { "format": "password" },
+          "rule": {
+            "effect": "SHOW",
+            "condition": {
+              "scope": "#/properties/imagehost",
+              "schema": { "const": "imgbb" }
+            }
+          }
+        },
         {
           "type": "Control",
           "scope": "#/properties/users",

plugin_suite_test.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestDiscordPlugin(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Discord Plugin Main Suite")
+}