Add player profiles and community settings

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/domain/player_profile_test.go

@@ -0,0 +1,80 @@
+package domain
+
+import (
+	"errors"
+	"testing"
+	"time"
+)
+
+func TestPlayerIdentityValidation(t *testing.T) {
+	player := Player{DisplayName: "  Ana Main  ", BattleTag: "Ana#1234"}
+	if err := player.ValidateIdentity(); err != nil {
+		t.Fatal(err)
+	}
+	if player.DisplayName != "Ana Main" {
+		t.Fatalf("display name was not trimmed: %q", player.DisplayName)
+	}
+	player.DisplayName = "A"
+	if !errors.Is(player.ValidateIdentity(), ErrInvalid) {
+		t.Fatal("one-character display name must be invalid")
+	}
+	player.DisplayName, player.BattleTag = "Valid", "invalid"
+	if !errors.Is(player.ValidateIdentity(), ErrInvalid) {
+		t.Fatal("invalid BattleTag must be rejected")
+	}
+	player.BattleTag = ""
+	if err := player.ValidateIdentity(); err != nil {
+		t.Fatalf("empty BattleTag must clear the value: %v", err)
+	}
+}
+
+func TestBuildPlayerProfileUsesEffectiveResultsAndFinalRoster(t *testing.T) {
+	start := time.Date(2026, time.July, 19, 18, 0, 0, 0, time.UTC)
+	event := Event{ID: "event", Name: "Sunday Mix", StartsAt: start, State: Completed}
+	teamA := Team{ID: "a", Name: "Alpha", Slots: []Slot{{PlayerID: "player"}}}
+	teamB := Team{ID: "b", Name: "Bravo", Slots: []Slot{{PlayerID: "opponent"}}}
+	series := Series{
+		ID: "series", EventID: event.ID, TeamAID: teamA.ID, TeamBID: teamB.ID,
+		WinnerTeamID: teamA.ID, Phase: SeriesComplete,
+		Results: []MapResult{
+			{Outcome: TeamBWin},
+			{Outcome: TeamAWin},
+			{Outcome: Draw},
+			{Outcome: TeamAWin, CorrectionOf: 1},
+		},
+	}
+	profile := BuildPlayerProfile(Player{ID: "player", DisplayName: "Player", AccountID: ""}, []PlayerSeriesContext{
+		{Event: event, Series: series, TeamA: teamA, TeamB: teamB},
+		{Event: Event{State: Live}, Series: series, TeamA: teamA, TeamB: teamB},
+		{Event: event, Series: series, TeamA: Team{ID: "a"}, TeamB: teamB},
+	}, 10)
+
+	if profile.Summary.SeriesPlayed != 1 || profile.Summary.SeriesWon != 1 || profile.Summary.WinRate != 1 {
+		t.Fatalf("unexpected series summary: %+v", profile.Summary)
+	}
+	if profile.Summary.MapsPlayed != 3 || profile.Summary.MapsWon != 2 ||
+		profile.Summary.MapsLost != 0 || profile.Summary.MapsDrawn != 1 {
+		t.Fatalf("corrected map result was not aggregated correctly: %+v", profile.Summary)
+	}
+	if len(profile.Recent) != 1 || profile.Recent[0].OwnScore != 2 || profile.Recent[0].OpponentScore != 0 {
+		t.Fatalf("unexpected history: %+v", profile.Recent)
+	}
+	if !profile.Player.IsGuest {
+		t.Fatal("account-less players must be represented as guests")
+	}
+}
+
+func TestCommunitySettingsValidation(t *testing.T) {
+	for _, value := range []string{"", "https://discord.gg/mixmaker", "https://discord.com/invite/mixmaker"} {
+		settings := CommunitySettings{DiscordInviteURL: value}
+		if err := settings.Validate(); err != nil {
+			t.Fatalf("%q should be valid: %v", value, err)
+		}
+	}
+	for _, value := range []string{"http://discord.gg/code", "https://example.com/invite", "https://discord.gg/", "https://discord.gg/code/path"} {
+		settings := CommunitySettings{DiscordInviteURL: value}
+		if !errors.Is(settings.Validate(), ErrInvalid) {
+			t.Fatalf("%q should be invalid", value)
+		}
+	}
+}