From f520f130d266691301940f357967108d6a8cb7da Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Sun, 19 Jan 2025 09:43:57 +0200
Subject: internal gemini capsule links stay gemini://

---
 internal/summary/summary.go      | 10 ++++++++--
 internal/summary/summary_test.go | 23 +++++++++++++++++++++++
 2 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 internal/summary/summary_test.go

(limited to 'internal/summary')

diff --git a/internal/summary/summary.go b/internal/summary/summary.go
index 2cd88ac..50fbc22 100644
--- a/internal/summary/summary.go
+++ b/internal/summary/summary.go
@@ -72,7 +72,7 @@ func generateGemtext(args config.Args, entries []entry.Entry, title string) (str
 			sb.WriteString("\n")
 			for _, url := range urls {
 				sb.WriteString("\n")
-				sb.WriteString(gemtextLink(url, 30))
+				sb.WriteString(gemtextLink(args.GeminiCapsule, url, 30))
 			}
 		}
 	}
@@ -149,10 +149,16 @@ func prepare(content string) string {
 	return content
 }
 
-func gemtextLink(url string, maxLen int) string {
+func gemtextLink(geminiCapsule, url string, maxLen int) string {
 	url = strings.TrimSpace(url)
 	urlNoProto := regexp.MustCompile(`^[a-zA-Z]+://`).ReplaceAllString(url, "")
 
+	if strings.HasPrefix(urlNoProto, geminiCapsule) &&
+		(strings.HasPrefix(url, "http://") || strings.HasPrefix(url, "https://")) {
+		// This is an internal link, so replace proto with gemini://
+		url = "gemini://" + urlNoProto
+	}
+
 	if len(urlNoProto) <= maxLen {
 		return "=> " + url + " " + urlNoProto
 	}
diff --git a/internal/summary/summary_test.go b/internal/summary/summary_test.go
new file mode 100644
index 0000000..4b33609
--- /dev/null
+++ b/internal/summary/summary_test.go
@@ -0,0 +1,23 @@
+package summary
+
+import "testing"
+
+func TestGemtextLink(t *testing.T) {
+	const geminiCapsule = "foo.zone"
+
+	table := map[string]string{
+		"http://example.com":  "=> http://example.com example.com",
+		"https://example.org": "=> https://example.org example.org",
+		"https://example.org/some/very/long/link/here?with=a&free=of&parameters=here": "=> https://example.org/some/very/long/link/here?with=a&free=of&parameters=here example.org/s...rameters=here",
+		"http://foo.zone":  "=> gemini://foo.zone foo.zone",
+		"https://foo.zone": "=> gemini://foo.zone foo.zone",
+		"beer://foo.zone":  "=> beer://foo.zone foo.zone",
+		"https://foo.zone/some/very/long/link/here?with=a&free=of&parameters=here": "=> gemini://foo.zone/some/very/long/link/here?with=a&free=of&parameters=here foo.zone/some...rameters=here",
+	}
+
+	for url, expected := range table {
+		if result := gemtextLink(geminiCapsule, url, 30); result != expected {
+			t.Errorf("Expected '%s' but got '%s' with input '%s'", expected, result, url)
+		}
+	}
+}
-- 
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