add custom footer

core/core.go

@@ -30,9 +30,12 @@ var Data = FullData{
 	// Maps are created in init()
 }
 
-// the Header of feeds.gmi.
+// the Header and Footer of feeds.gmi.
 // set in Init, either to the contents of header.gmi or to the default string
-var Header string
+var (
+	Header string
+	Footer string
+)
 
 // Timeout for requests
 var Timeout int
@@ -74,30 +77,55 @@ func Init(dataPath string, localizer *localizations.Localizer) error {
 		Data.Pages = make(map[string]*Page)
 	}
 
-	// initialize header.gmi
-	f, err = os.Open(filepath.Join(dataPath, "header.gmi"))
+	// initialize header.gmi and footer.gmi
+	Header, err = getHeaderFooter(
+		dataPath, "header.gmi",
+		TranslateString("# %s\n\n", "files.feed_default_header", nil), "",
+	)
+	if err != nil {
+		return err
+	}
+	footer, err := getHeaderFooter(
+		dataPath, "footer.gmi", "---\n\n",
+		TranslateString(
+			"=> https://git.nytpu.com/comitium/about/ %s\n",
+			"files.comitium_footer",
+			&localizations.Replacements{"version": Version, "commit": Commit},
+		),
+	)
+	if err != nil {
+		return err
+	}
+	Footer = fmt.Sprintf("\n\n%s", footer)
+
+	Timeout = 10
+
+	return nil
+}
+
+// gets a header or footer from a datapath, or uses a default. extraString is a
+// string to append no matter what
+func getHeaderFooter(dataPath, filename, defaultString, extraString string) (main string, err error) {
+	f, err := os.Open(filepath.Join(dataPath, filename))
 	if err == nil {
 		fi, err := f.Stat()
 		if err == nil && fi.Size() > 0 {
 			headerBytes, err := ioutil.ReadAll(f)
 			f.Close()
 			if err != nil {
-				return fmt.Errorf(localizer.Get("errors.read_file_error", &localizations.Replacements{"file": "header.gmi", "error": err}))
+				return "", fmt.Errorf(Localizer.Get("errors.read_file_error", &localizations.Replacements{"file": "header.gmi", "error": err}))
 			}
-			Header = string(headerBytes)
+			main = string(headerBytes)
 		}
 		f.Close()
 	} else if !os.IsNotExist(err) {
-		return fmt.Errorf(localizer.Get("errors.read_file_error", &localizations.Replacements{"file": "header.gmi", "error": err}))
+		return "", fmt.Errorf(Localizer.Get("errors.read_file_error", &localizations.Replacements{"file": "header.gmi", "error": err}))
 	}
 
-	if Header == "" {
-		Header = TranslateString("# %s\n\n", "files.feed_default_header", nil)
+	if main == "" {
+		main = defaultString
 	}
-
-	Timeout = 10
-
-	return nil
+	return main + extraString, nil
 }
 
 // WriteJSON writes a FullData to disk