Prepared for in-memory-caching (not yet functional).

getArticles.go

@@ -17,19 +17,22 @@ import (
 	"jaytaylor.com/html2text"
 )
 
+// ToDo: If caching == false create a global variable to save timestamp in memory.
+
 // Get new articles for specified feed.
-func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (string, error) {
+func getArticles(feedURL string, max int, noExcerpt bool, filter []string, caching bool) (string, error) {
 
 	type feedCache struct {
 		LastChange string
 	}
 
-	var output, cachePath string
+	var output, cachePath, cacheFile string
 	var last time.Time
 	var lastUpdate feedCache
 	var file *os.File
 	var updateTime time.Time
 
+	if caching == true {
 		// Get systems user cache path.
 		osCacheDir := os.Getenv("$XDG_CACHE_HOME")
 		if osCacheDir != "" {
@@ -78,7 +81,7 @@ func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (stri
 			}
 		}
 
-	cacheFile := cachePath + strconv.Itoa(int(h.Sum32()))
+		cacheFile = cachePath + strconv.Itoa(int(h.Sum32()))
 
 		if _, err := os.Stat(cacheFile); os.IsNotExist(err) {
 			file, err = os.Create(cacheFile)
@@ -116,6 +119,9 @@ func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (stri
 				log.Fatal("Error: Can't parse last updates time stamp:", err)
 			}
 		}
+	} else {
+		last = time.Now()
+	}
 
 	fp := gofeed.NewParser()
 	feed, err := fp.ParseURL(feedURL)
@@ -174,6 +180,7 @@ func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (stri
 		last = updateTime
 		lastUpdate.LastChange = updateTime.Format(time.RFC3339)
 
+		if caching == true {
 			// Remove file with cached timestamp and create it
 			// again with updated timestamp.
 			// ToDo: Replace timestamp without deleting.
@@ -193,6 +200,7 @@ func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (stri
 			if err != nil {
 				log.Fatal("Error: Can't write last update time stamp to cache file:", err)
 			}
+		}
 
 		// Remove redirects and tracking parameters from URL.
 		cleanURL, _ := removeTracking(article.Link)

main.go

@@ -17,11 +17,12 @@ type configuration struct {
 	Password      string
 	Muc           string
 	MucNick       string
+	Contact       string
 	MaxArticles   int
 	RefreshTime   time.Duration
 	NoExcerpt     bool
 	Quiet         bool
-	Contact       string
+	Caching       bool
 	Filter        []string
 	Feeds         []string
 }
@@ -72,7 +73,8 @@ func main() {
 	go pingMUC(client, config.BotJid, config.Muc, config.MucNick)
 
 	// Starting goroutine to process received stanzas.
-	go processStanzas(client, config.Muc, config.MucNick, config.Feeds, config.Quiet, config.Contact)
+	go processStanzas(client, config.Muc, config.MucNick, config.Feeds, config.Quiet,
+		config.Contact)
 
 	// Set RefreshTime to 30 seconds if not defined.
 	if config.RefreshTime == 0 {
@@ -83,7 +85,8 @@ func main() {
 		// Check all configured feeds for new articles and send
 		// new articles to configured MUC.
 		for i := 0; i < len(config.Feeds); i++ {
-			output, err := getArticles(config.Feeds[i], config.MaxArticles, config.NoExcerpt, config.Filter)
+			output, err := getArticles(config.Feeds[i], config.MaxArticles, config.NoExcerpt,
+				config.Filter, config.Caching)
 			if err != nil {
 				// Exit if an error occurs checking the feeds.
 				log.Fatal("Error: Can't check feeds for new articles: ", err)