fix avatars

cache.go

@@ -13,10 +13,12 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"sync"
 )
 
 // global or app-level map/cache
-var textureCache = make(map[string]gdk.Paintabler)
+// var textureCache = make(map[string]gdk.Paintabler)
+var textureCache sync.Map
 
 // Invalid images, if an image/avatar cannot be loaded on the system (e.g: incompatible format) it's put here
 var invalidImages = make(map[string]bool)
@@ -31,49 +33,57 @@ func ensureCache() (string, error) {
 	return cachePath, nil
 }
 
-func getTexture(path string) gdk.Paintabler {
-	if tex, exists := textureCache[path]; exists {
-		return tex
+func getTexture(path string) (gdk.Paintabler, error) {
+	tex, exists := textureCache.Load(path)
+	if exists {
+		return tex.(gdk.Paintabler), nil
 	}
+
 	tex, err := gdk.NewTextureFromFilename(path) // load once
 	if err != nil {
-		panic(err)
+		return nil, err
 	}
-	textureCache[path] = tex
-	return tex
+	textureCache.Store(path, tex)
+	return tex.(gdk.Paintabler), nil
 }
 
-func newPictureFromPath(path string) *gtk.Picture {
-	tex := getTexture(path)
+func newPictureFromPath(path string) (*gtk.Picture, error) {
+	tex, err := getTexture(path)
+	if err != nil {
+		return nil, err
+	}
 	img := gtk.NewPictureForPaintable(tex)
-	return img
+	return img, nil
 }
 
-func newImageFromPath(path string) *gtk.Image {
-	tex := getTexture(path)
+func newImageFromPath(path string) (*gtk.Image, error) {
+	tex, err := getTexture(path)
+	if err != nil {
+		return nil, err
+	}
 	img := gtk.NewImageFromPaintable(tex)
-	return img
+	return img, nil
 }
 
-func newPictureFromWeb(url string) *gtk.Picture {
+func newPictureFromWeb(url string) (*gtk.Picture, error) {
 	pa, _ := ensureCache()
 	// step 1: get a sha256 sum of the URL
 	sum := fmt.Sprintf("%x", sha256.Sum256([]byte(url)))
 
-	p, ok := textureCache[sum]
+	p, ok := textureCache.Load(sum)
 	if ok {
-		return gtk.NewPictureForPaintable(p)
+		return gtk.NewPictureForPaintable(p.(gdk.Paintabler)), nil
 	}
 
 	// step 2: download it
 	resp, err := http.Get(url)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	b, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	fullpath := filepath.Join(pa, sum)
@@ -81,31 +91,31 @@ func newPictureFromWeb(url string) *gtk.Picture {
 	// step 3: save it
 	err = os.WriteFile(fullpath, b, 0644)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	return newPictureFromPath(fullpath)
 }
 
-func newImageFromWeb(url string) *gtk.Image {
+func newImageFromWeb(url string) (*gtk.Image, error) {
 	pa, _ := ensureCache()
 	// step 1: get a sha256 sum of the URL
 	sum := fmt.Sprintf("%x", sha256.Sum256([]byte(url)))
 
-	p, ok := textureCache[sum]
+	p, ok := textureCache.Load(sum)
 	if ok {
-		return gtk.NewImageFromPaintable(p)
+		return gtk.NewImageFromPaintable(p.(gdk.Paintabler)), nil
 	}
 
 	// step 2: download it
 	resp, err := http.Get(url)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	b, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	fullpath := filepath.Join(pa, sum)
@@ -113,7 +123,7 @@ func newImageFromWeb(url string) *gtk.Image {
 	// step 3: save it
 	err = os.WriteFile(fullpath, b, 0644)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	return newImageFromPath(fullpath)