Fix access check for org-level project (#26182)

Fix #25934

Add `ignoreGlobal` parameter to `reqUnitAccess` and only check global
disabled units when `ignoreGlobal` is true. So the org-level projects
and user-level projects won't be affected by global disabled
`repo.projects` unit.

tests/integration/org_project_test.go

@@ -0,0 +1,61 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"net/http"
+	"testing"
+
+	unit_model "code.gitea.io/gitea/models/unit"
+	"code.gitea.io/gitea/tests"
+)
+
+func TestOrgProjectAccess(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	// disable repo project unit
+	unit_model.DisabledRepoUnits = []unit_model.Type{unit_model.TypeProjects}
+
+	// repo project, 404
+	req := NewRequest(t, "GET", "/user2/repo1/projects")
+	MakeRequest(t, req, http.StatusNotFound)
+
+	// user project, 200
+	req = NewRequest(t, "GET", "/user2/-/projects")
+	MakeRequest(t, req, http.StatusOK)
+
+	// org project, 200
+	req = NewRequest(t, "GET", "/user3/-/projects")
+	MakeRequest(t, req, http.StatusOK)
+
+	// change the org's visibility to private
+	session := loginUser(t, "user2")
+	req = NewRequestWithValues(t, "POST", "/org/user3/settings", map[string]string{
+		"_csrf":      GetCSRF(t, session, "/user3/-/projects"),
+		"name":       "user3",
+		"visibility": "2",
+	})
+	session.MakeRequest(t, req, http.StatusSeeOther)
+
+	// user4 can still access the org's project because its team(team1) has the permission
+	session = loginUser(t, "user4")
+	req = NewRequest(t, "GET", "/user3/-/projects")
+	session.MakeRequest(t, req, http.StatusOK)
+
+	// disable team1's project unit
+	session = loginUser(t, "user2")
+	req = NewRequestWithValues(t, "POST", "/org/user3/teams/team1/edit", map[string]string{
+		"_csrf":       GetCSRF(t, session, "/user3/-/projects"),
+		"team_name":   "team1",
+		"repo_access": "specific",
+		"permission":  "read",
+		"unit_8":      "0",
+	})
+	session.MakeRequest(t, req, http.StatusSeeOther)
+
+	// user4 can no longer access the org's project
+	session = loginUser(t, "user4")
+	req = NewRequest(t, "GET", "/user3/-/projects")
+	session.MakeRequest(t, req, http.StatusNotFound)
+}