feat: apply configured default user avatars

server/default_avatar_test.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/tinode/chat/server/store"
+	"github.com/tinode/chat/server/store/types"
+)
+
+type defaultAvatarConfigStore map[string]string
+
+func (s defaultAvatarConfigStore) Get(_ string, keys ...string) (map[string]string, error) {
+	out := make(map[string]string, len(keys))
+	for _, key := range keys {
+		out[key] = s[key]
+	}
+	return out, nil
+}
+
+func TestUserSummaryPayloadAppliesDefaultAvatarByGenderAndUserID(t *testing.T) {
+	oldConfig := store.ThirdPartyConfig
+	store.ThirdPartyConfig = defaultAvatarConfigStore{
+		imDefaultMaleAvatarURLsConfig:   `["m0","m1","m2","m3","m4"]`,
+		imDefaultFemaleAvatarURLsConfig: `["f0","f1","f2","f3","f4"]`,
+	}
+	defer func() { store.ThirdPartyConfig = oldConfig }()
+
+	for i, gender := range []string{"male", "female"} {
+		uid := types.Uid(10 + i)
+		payload := userSummaryPayload(&types.User{
+			ObjHeader: types.ObjHeader{Id: uid.String()},
+			Public:    map[string]any{"display_name": "Alice", "gender": gender},
+		}, "")
+		wantPrefix := "m"
+		if gender == "female" {
+			wantPrefix = "f"
+		}
+		want := fmt.Sprintf("%s%d", wantPrefix, uint64(uid)%5)
+		if payload["avatar_file_id"] != want {
+			t.Fatalf("gender=%s avatar=%v want %s", gender, payload["avatar_file_id"], want)
+		}
+	}
+}
+
+func TestUserSummaryPayloadKeepsUploadedAvatar(t *testing.T) {
+	oldConfig := store.ThirdPartyConfig
+	store.ThirdPartyConfig = defaultAvatarConfigStore{
+		imDefaultMaleAvatarURLsConfig: `["m0","m1","m2","m3","m4"]`,
+	}
+	defer func() { store.ThirdPartyConfig = oldConfig }()
+
+	payload := userSummaryPayload(&types.User{
+		ObjHeader: types.ObjHeader{Id: types.Uid(10).String()},
+		Public:    map[string]any{"display_name": "Alice", "gender": "male", "avatar_file_id": "uploaded.png"},
+	}, "")
+	if payload["avatar_file_id"] != "uploaded.png" {
+		t.Fatalf("avatar=%v", payload["avatar_file_id"])
+	}
+}