1 files changed, 34 insertions, 2 deletions

diff --git a/internal/port/gemini.go b/internal/port/gemini.go
index 740fccd..f67ca05 100644
--- a/internal/port/gemini.go
+++ b/internal/port/gemini.go
@@ -29,8 +29,9 @@ type GeminiTemplateVariables struct {
 }
 
 type GeminiNavItem struct {
-        Label string
-        URL   string
+        Label   string
+        URL     string
+        Current bool
 }
 
 type GeminiSection struct {
@@ -40,6 +41,32 @@ type GeminiSection struct {
         Items []string
 }
 
+func urlToGeminiNav(url string) (items []GeminiNavItem) {
+        partialURL := "/gemini"
+        parts := strings.Split(url, "/")
+
+        if len(parts) != 0 && parts[len(parts)-1] == "" {
+                parts = parts[:len(parts)-1]
+        }
+
+        for i, part := range parts {
+                partialURL = partialURL + "/" + part
+
+                current := false
+                if i == len(parts)-1 || (len(parts) == 2 && i == 0) {
+                        current = true
+                }
+
+                items = append(items, GeminiNavItem{
+                        Label:   part,
+                        URL:     partialURL,
+                        Current: current,
+                })
+        }
+
+        return
+}
+
 func resolveURL(uri string, baseURL *url.URL) (resolvedURL string) {
         if strings.HasPrefix(uri, "//") {
                 resolvedURL = "/gemini/" + strings.TrimPrefix(uri, "//")
@@ -137,6 +164,7 @@ func GeminiHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, ass
                                         Type: libgemini.RAW_TEXT.String(),
                                         Text: fmt.Sprintf("Error: %s", err),
                                 }},
+                                Nav:     urlToGeminiNav(hostport),
                                 IsPlain: true,
                         }); e != nil {
                                 log.Println("Template error: " + e.Error())
@@ -167,6 +195,7 @@ func GeminiHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, ass
                                         Type: libgemini.RAW_TEXT.String(),
                                         Text: fmt.Sprintf("Error: %s", err),
                                 }},
+                                Nav:     urlToGeminiNav(fmt.Sprintf("%s/%s", hostport, uri)),
                                 IsPlain: true,
                         }); e != nil {
                                 log.Println("Template error: " + e.Error())
@@ -190,6 +219,7 @@ func GeminiHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, ass
                                                 Type: libgemini.RAW_TEXT.String(),
                                                 Text: fmt.Sprintf("Error: %s", err),
                                         }},
+                                        Nav:     urlToGeminiNav(fmt.Sprintf("%s/%s", hostport, uri)),
                                         IsPlain: true,
                                 }); e != nil {
                                         log.Println("Template error: " + e.Error())
@@ -211,6 +241,7 @@ func GeminiHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, ass
                                         Type: libgemini.RAW_TEXT.String(),
                                         Text: fmt.Sprintf("Error %d: %s", res.Header.Status, res.Header.Meta),
                                 }},
+                                Nav:     urlToGeminiNav(fmt.Sprintf("%s/%s", hostport, uri)),
                                 IsPlain: true,
                         }); err != nil {
                                 log.Println("Template error: " + err.Error())
@@ -252,6 +283,7 @@ func GeminiHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, ass
                                 URL:      fmt.Sprintf("%s/%s", hostport, uri),
                                 Assets:   assetList,
                                 Sections: sections,
+                                Nav:      urlToGeminiNav(fmt.Sprintf("%s/%s", hostport, uri)),
                                 IsPlain:  isPlain,
                         }); err != nil {
                                 log.Println("Template error: " + err.Error())