52310dbf65
SNI middleware already stores scheme://host; SEOFromRequest no longer takes a base URL or re-strips the path. Expose context helpers and drop the obsolete strip tests. Signed-off-by: Émile Ré <emile@probo.com>
123 lines
3.8 KiB
Go
123 lines
3.8 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package complianceportal_v1
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import (
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"net/http"
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"net/url"
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"slices"
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"strings"
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"go.gearno.de/x/ref"
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"go.probo.inc/probo/pkg/iam"
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"go.probo.inc/probo/pkg/server/api/complianceportal"
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)
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const defaultCompliancePortalLocale = "en"
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// SEOFromRequest derives html lang, a self-referencing canonical URL, and
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// hreflang alternates (including x-default → English) for the SPA shell.
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// Portals are host-routed (slug subdomain / custom domain); the request path
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// is already relative to the portal root. The portal origin comes from
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// request context (set by SNI middleware as scheme://host). When missing,
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// canonical and hreflang are left empty so callers do not emit relative SEO
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// links.
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func SEOFromRequest(r *http.Request) (htmlLang, canonical string, hreflang []HreflangLink) {
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pathname := r.URL.Path
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if pathname == "" {
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pathname = "/"
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}
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locale, rest := splitLocaleFromAppPath(pathname)
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htmlLang = locale
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origin := ref.UnrefOrZero(complianceportal.CompliancePortalBaseURLFromContext(r.Context()))
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if origin == "" {
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return htmlLang, "", nil
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}
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canonical = localizedPageURL(origin, locale, rest)
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locales := iam.SupportedIdentityLocales
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hreflang = make([]HreflangLink, 0, len(locales)+1)
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for _, loc := range locales {
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hreflang = append(hreflang, HreflangLink{
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Lang: loc,
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Href: localizedPageURL(origin, loc, rest),
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})
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}
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hreflang = append(hreflang, HreflangLink{
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Lang: "x-default",
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Href: localizedPageURL(origin, defaultCompliancePortalLocale, rest),
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})
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return htmlLang, canonical, hreflang
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}
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func splitLocaleFromAppPath(appPath string) (locale, rest string) {
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segments := strings.Split(strings.Trim(appPath, "/"), "/")
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if len(segments) == 0 || segments[0] == "" {
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return defaultCompliancePortalLocale, "/"
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}
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if isCompliancePortalLocale(segments[0]) {
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locale = segments[0]
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if len(segments) == 1 {
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return locale, "/"
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}
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return locale, "/" + strings.Join(segments[1:], "/")
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}
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// Unprefixed path — treat content path as-is; default lang for tags.
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return defaultCompliancePortalLocale, appPath
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}
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func isCompliancePortalLocale(value string) bool {
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return slices.Contains(iam.SupportedIdentityLocales, value)
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}
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func localizedPageURL(pageBaseURL, locale, rest string) string {
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base := strings.TrimRight(pageBaseURL, "/")
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segments := []string{locale}
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if rest != "/" && rest != "" {
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trimmed := strings.Trim(rest, "/")
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if trimmed != "" {
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segments = append(segments, strings.Split(trimmed, "/")...)
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}
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}
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escaped := make([]string, len(segments))
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for i, segment := range segments {
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escaped[i] = url.PathEscape(segment)
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}
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joined, err := url.JoinPath(base, escaped...)
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if err != nil {
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return base + "/" + strings.Join(escaped, "/")
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}
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return joined
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}
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