Refactor web routes (#30519)

Re-organize the routes in web.go and use ctx constants instead of `context.UnitTypes()`

---------

Co-authored-by: Giteabot <teabot@gitea.io>

Author: wxiaoguang

models/organization/team.go

@@ -174,23 +174,27 @@ func (t *Team) LoadMembers(ctx context.Context) (err error) {
 	return err
 }
 
-// UnitEnabled returns if the team has the given unit type enabled
+// UnitEnabled returns true if the team has the given unit type enabled
 func (t *Team) UnitEnabled(ctx context.Context, tp unit.Type) bool {
 	return t.UnitAccessMode(ctx, tp) > perm.AccessModeNone
 }
 
-// UnitAccessMode returns if the team has the given unit type enabled
+// UnitAccessMode returns the access mode for the given unit type, "none" for non-existent units
 func (t *Team) UnitAccessMode(ctx context.Context, tp unit.Type) perm.AccessMode {
+	accessMode, _ := t.UnitAccessModeEx(ctx, tp)
+	return accessMode
+}
+
+func (t *Team) UnitAccessModeEx(ctx context.Context, tp unit.Type) (accessMode perm.AccessMode, exist bool) {
 	if err := t.LoadUnits(ctx); err != nil {
 		log.Warn("Error loading team (ID: %d) units: %s", t.ID, err.Error())
 	}
-
-	for _, unit := range t.Units {
-		if unit.Type == tp {
-			return unit.AccessMode
+	for _, u := range t.Units {
+		if u.Type == tp {
+			return u.AccessMode, true
 		}
 	}
-	return perm.AccessModeNone
+	return perm.AccessModeNone, false
 }
 
 // IsUsableTeamName tests if a name could be as team name

models/perm/access/repo_permission.go

@@ -102,6 +102,16 @@ func (p *Permission) CanWriteIssuesOrPulls(isPull bool) bool {
 	return p.CanWrite(unit.TypeIssues)
 }
 
+func (p *Permission) ReadableUnitTypes() []unit.Type {
+	types := make([]unit.Type, 0, len(p.Units))
+	for _, u := range p.Units {
+		if p.CanRead(u.Type) {
+			types = append(types, u.Type)
+		}
+	}
+	return types
+}
+
 func (p *Permission) LogString() string {
 	format := "<Permission AccessMode=%s, %d Units, %d UnitsMode(s): [ "
 	args := []any{p.AccessMode.String(), len(p.Units), len(p.UnitsMode)}
@@ -229,12 +239,8 @@ func GetUserRepoPermission(ctx context.Context, repo *repo_model.Repository, use
 	for _, u := range repo.Units {
 		var found bool
 		for _, team := range teams {
-			teamMode := team.UnitAccessMode(ctx, u.Type)
-			if teamMode > perm_model.AccessModeNone {
-				m := perm.UnitsMode[u.Type]
-				if m < teamMode {
-					perm.UnitsMode[u.Type] = teamMode
-				}
+			if teamMode, exist := team.UnitAccessModeEx(ctx, u.Type); exist {
+				perm.UnitsMode[u.Type] = max(perm.UnitsMode[u.Type], teamMode)
 				found = true
 			}
 		}

routers/web/repo/view.go

@@ -721,12 +721,12 @@ func checkHomeCodeViewable(ctx *context.Context) {
 		}
 
 		var firstUnit *unit_model.Unit
-		for _, repoUnit := range ctx.Repo.Units {
-			if repoUnit.Type == unit_model.TypeCode {
+		for _, repoUnitType := range ctx.Repo.Permission.ReadableUnitTypes() {
+			if repoUnitType == unit_model.TypeCode {
 				return
 			}
 
-			unit, ok := unit_model.Units[repoUnit.Type]
+			unit, ok := unit_model.Units[repoUnitType]
 			if ok && (firstUnit == nil || !firstUnit.IsLessThan(unit)) {
 				firstUnit = &unit
 			}