M http.go → http.go

@@ -104,6 +104,7 @@ fileName := filepath.Clean(r.URL.Path[len("/edit/"):])
 	filePath := path.Join(c.FilesDirectory, user.Username, fileName)
 	isText := isTextFile(filePath)
 	alert := ""
+	var warnings []string
 	if r.Method == "POST" {
 		// get post body
 		r.ParseForm()
@@ -117,6 +118,13 @@ if err != nil {
 			log.Println(err)
 			renderError(w, err.Error(), http.StatusBadRequest)
 			return
+		}
+		sfl := getSchemedFlounderLinkLines(strings.NewReader(fileText))
+		if len(sfl) > 0 {
+			warnings = append(warnings, "Warning! Some of your links to flounder pages use schemas. This means that they may break when viewed in Gemini or over HTTPS. Plase remove gemini: or https: from the start of these links:\n")
+			for _, l := range sfl {
+				warnings = append(warnings, l)
+			}
 		}
 		// create directories if dne
 		os.MkdirAll(path.Dir(filePath), os.ModePerm)
@@ -176,7 +184,8 @@ AuthUser  AuthUser
 		Host      string
 		IsText    bool
 		Alert     string
-	}{fileName, string(fileBytes), c.SiteTitle, user, c.Host, isText, alert}
+		Warnings  []string
+	}{fileName, string(fileBytes), c.SiteTitle, user, c.Host, isText, alert, warnings}
 	err = t.ExecuteTemplate(w, "edit_file.html", data)
 	if err != nil {
 		panic(err)

M templates/edit_file.html → templates/edit_file.html

@@ -3,6 +3,13 @@ <h2>Editing <a href="//{{.AuthUser.Username}}.{{.Host}}/{{.FileName}}">{{.FileName}}</a></h2>
 <form id="edit-form" action="/edit/{{.FileName}}" method="POST">
  <label for="rename">Rename:</label>
    <input type="text" value="{{.FileName}}" id="rename" name="rename">
+  <div class="warning">
+    <p>
+   {{ range .Warnings }}
+    </p>
+    {{ . }}
+  {{ end }}
+  </div>
    {{ if .IsText }}
   <textarea rows="27" name="file_text" id="editor">{{.FileText}}</textarea>
   {{ end }}

M templates/static/style.css → templates/static/style.css

@@ -105,6 +105,11 @@
 .error {
   color: red;
 }
+
+.warning {
+  color: #ffcc00 ;
+}
+
 .alert {
   color: green;
 }

M utils.go → utils.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"archive/zip"
+	"bufio"
 	"fmt"
 	"io"
 	"mime"
@@ -12,6 +13,19 @@ "strings"
 	"time"
 	"unicode/utf8"
 )
+
+func getSchemedFlounderLinkLines(r io.Reader) []string {
+	scanner := bufio.NewScanner(r)
+	result := []string{}
+	for scanner.Scan() {
+		text := scanner.Text()
+		// TODO use actual parser. this could be a little wonky
+		if strings.HasPrefix(text, "=>") && strings.Contains(text, c.Host) && (strings.Contains(text, "gemini://") || strings.Contains(text, "https://")) {
+			result = append(result, text)
+		}
+	}
+	return result
+}
 
 // Check if it is a text file, first by checking mimetype, then by reading bytes
 // Stolen from https://github.com/golang/tools/blob/master/godoc/util/util.go