basic mp3 enclosures working

.gitignore

@@ -1,2 +1,3 @@
 *.xml
 config.json
+*.mp3

lib/filesize.go

@@ -0,0 +1,51 @@
+package lib
+
+import (
+  "strconv"
+  "unicode"
+  "strings"
+  "os/exec"
+  "os"
+)
+
+func extractInt(text string) int {
+  filteredString := ""
+  for _, character := range text {
+    if unicode.IsDigit(character) {
+      filteredString += string(character)
+    }
+  }
+  integer, convErr := strconv.Atoi(filteredString)
+  if convErr != nil {
+    Error.Println(convErr)
+    return 1
+  } else {
+    return integer
+  }
+}
+
+func FileSizeLocal(filename string) int {
+  fileInfo, fileErr := os.Stat(filename)
+  if fileErr != nil {
+    Error.Println(fileErr)
+    return 1
+  }
+  return int(fileInfo.Size())
+}
+
+func FileSizeUrl(url string) int {
+  cmd := exec.Command("curl", "-sIL", url)
+  cmdOutput, cmdErr := cmd.Output()
+  if cmdErr != nil {
+    Error.Println(cmdErr)
+    return 1
+  } else {
+    for _, line := range strings.Split(string(cmdOutput), "\n") {
+      if strings.Contains(line, "content-length") {
+        return extractInt(line)
+      }
+    }
+  }
+  Error.Printf("No content-length found for %s", url)
+  return 1
+}

lib/markdown.go

@@ -31,6 +31,10 @@ func convertMarkdownLink(text string, markdownLinks *regexp.Regexp) string {
   return "<p>" + markdownLinks.ReplaceAllString(text, "<a href='$2'>$1</a>") + "</p>"
 }
 
+func convertMarkdownEnclosure(text string, markdownLinks *regexp.Regexp) string {
+  return "<enclosure " + markdownLinks.ReplaceAllString(text, "url='$2' type='$1'") + " />"
+}
+
 func convertMarkdownList(text string) string {
   if !markdownListActive {
     markdownListActive = true
@@ -42,6 +46,9 @@ func convertMarkdownList(text string) string {
 func ConvertMarkdownToRSS(text string) string {
   markdownLinks := regexp.MustCompile(`\[(.*)\]\((.*)\)`)
   markdownLists := regexp.MustCompile(`^(\s*)(-|\*|\+)(.*)`)
+  if markdownLinks.Match([]byte(text)) && strings.Contains(text, "audio/mpeg") {
+    return convertMarkdownEnclosure(text, markdownLinks)
+  }
   if markdownLinks.Match([]byte(text)) {
     return convertMarkdownLink(text, markdownLinks)
   }
@@ -59,7 +66,7 @@ func GetArticles(config Config) ([]Article, error) {
   articles := []Article{}
   if fileErr == nil {
     for _, file := range RawArticles {
-      if !file.IsDir() && !strings.HasPrefix(file.Name(), "draft-") {
+      if !file.IsDir() && !strings.HasPrefix(file.Name(), "draft-") && strings.HasSuffix(file.Name(), ".md") {
         var article Article
         fileInfo, _ := file.Info()
         article.Filename = file.Name() 

test/another-article.md

@@ -5,6 +5,8 @@
 
 Hi all. I've added my public PGP key to the files section of this website. It's linked to my main e-mail address (hello[at]timokats[dot]xyz).  
 
+[audio/mpeg](https://www.native-instruments.com/fileadmin/ni_media/producer/koresoundpack/fm8transientattacks/audio/1_FM8ROXXS.mp3)
+
 Note, for me it's not a hard requirement to use it when sending me an email. In fact, it's mainly there for those that prefer/require encrypted correspondence when contacting me. 
 
 Timo