From 385d1002e0ee46a0f2c3a6cfc9138e748a452df5 Mon Sep 17 00:00:00 2001
From: Petter Rodhelind <petter.rodhelind@gmail.com>
Date: Mon, 22 Feb 2021 02:00:40 +0100
Subject: DO NOT use global state for outputMode...

---
 main.go | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/main.go b/main.go
index db1492e..1dd845c 100644
--- a/main.go
+++ b/main.go
@@ -10,9 +10,6 @@ import (
 )
 
 var (
-	// outputMode is either HTML or RSS
-	outputMode string
-
 	// cache will hold all previous network calls and re-use within set timeframe
 	cache safeCache
 
@@ -20,8 +17,12 @@ var (
 	cacheTimeout float64
 )
 
+const (
+	outputHTML = iota
+	outputRSS
+)
+
 func init() {
-	outputMode = "html"
 	cache = safeCache{v: make(map[string]*channel)}
 	cacheTimeout = 60 * 15 // seconds
 }
@@ -40,12 +41,12 @@ type channel struct {
 	Items       []*post
 }
 
-func (c *channel) String() string {
+func (c *channel) Print(outputMode int) string {
 	var template string
 	switch outputMode {
-	case "html":
+	case outputHTML:
 		template = htmlRoot
-	case "rss":
+	case outputRSS:
 		template = rssRoot
 	}
 
@@ -57,7 +58,7 @@ func (c *channel) String() string {
 
 	var items string
 	for i := range c.Items {
-		item := c.Items[i].String()
+		item := c.Items[i].Print(outputMode)
 		item = strings.Replace(item, "{{link}}", c.Link, -1)
 		items += item
 	}
@@ -77,12 +78,12 @@ type image struct {
 	Caption string
 }
 
-func (p *post) String() string {
+func (p *post) Print(outputMode int) string {
 	var template string
 	switch outputMode {
-	case "html":
+	case outputHTML:
 		template = htmlItem
-	case "rss":
+	case outputRSS:
 		template = rssItem
 	}
 
@@ -123,9 +124,10 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if path[0] == '@' {
 		path = path[1:]
 	}
+	outputMode := outputHTML
 	if strings.HasSuffix(path, ".rss") {
 		path = strings.TrimSuffix(path, ".rss")
-		outputMode = "rss"
+		outputMode = outputRSS
 	}
 
 	c, ok := cache.v[path]
@@ -150,7 +152,7 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		cache.Unlock()
 	}
 
-	fmt.Fprintf(w, "%s\n", c.String())
+	fmt.Fprintf(w, "%s\n", c.Print(outputMode))
 }
 
 func fetch(path string) (c *channel, err error) {
-- 
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