server: reorganize code into smaller functions

server.go

@@ -22,80 +22,106 @@ type server struct {
 }
 
 func newServer() (*server, error) {
-	files, err := ioutil.ReadDir("posts/")
+	s := &server{
+		staticHandler: http.FileServer(http.Dir("static/")),
+	}
 
+	err := s.refreshPages()
 	if err != nil {
 		return nil, err
 	}
 
-	s := &server{
-		pages:         make([]*Page, 0, len(files)),
-		staticHandler: http.FileServer(http.Dir("static/")),
+	err = s.refreshTemplates()
+	if err != nil {
+		return nil, err
 	}
 
+	err = s.refreshStyles()
+	if err != nil {
+		return nil, err
+	}
+
+	return s, nil
+}
+
+func (s *server) refreshPages() error {
+	files, err := ioutil.ReadDir("posts/")
+	if err != nil {
+		return err
+	}
+
+	s.pages = make([]*Page, 0, len(files))
 	for _, f := range files {
 		filename := f.Name()
 
 		if strings.HasSuffix(filename, ".md") {
 			page, err := newPage(strings.TrimSuffix(filename, ".md"))
 			if err != nil {
-				return nil, fmt.Errorf("could not render %s: %s", filename, err)
+				return fmt.Errorf("could not render %s: %s", filename, err)
 			}
 			s.pages = append(s.pages, page)
 			log.Printf("Loaded page %s", filename)
 		}
 	}
 
+	return nil
+}
+
+func (s *server) refreshTemplates() error {
+	var err error
 	s.pageTpl, err = raymond.ParseFile("templates/page.html")
 	if err != nil {
-		return nil, fmt.Errorf("could not parse page template")
+		return fmt.Errorf("could not parse page template")
 	}
 	log.Printf("Loaded page template")
 
 	s.fullPostTpl, err = raymond.ParseFile("templates/fullpost.html")
 	if err != nil {
-		return nil, fmt.Errorf("could not parse full post template")
+		return fmt.Errorf("could not parse full post template")
 	}
 	log.Printf("Loaded full post template")
 
 	s.summaryTpl, err = raymond.ParseFile("templates/summary.html")
 	if err != nil {
-		return nil, fmt.Errorf("could not parse summary template")
+		return fmt.Errorf("could not parse summary template")
 	}
 	log.Printf("Loaded summary template")
+	return nil
+}
 
+func (s *server) refreshStyles() error {
 	styles, err := ioutil.ReadDir("styles/")
 	if err != nil {
-		return nil, fmt.Errorf("Could not load styles directory: %s", err)
+		return fmt.Errorf("Could not load styles directory: %s", err)
 	}
 
 	for _, s := range styles {
 		filename := s.Name()
 		in, err := os.Open("styles/" + filename)
 		if err != nil {
-			return nil, fmt.Errorf("Could not open style infile %s: %s", filename, err)
+			return fmt.Errorf("Could not open style infile %s: %s", filename, err)
 		}
 		if strings.HasSuffix(filename, ".scss") {
 			outFilename := strings.TrimSuffix(filename, ".scss") + ".css"
 			out, err := os.Create("static/css/" + outFilename)
 			if err != nil {
-				return nil, fmt.Errorf("Could not open style outfile %s: %s", outFilename, err)
+				return fmt.Errorf("Could not open style outfile %s: %s", outFilename, err)
 			}
 			comp, err := libsass.New(out, in)
 			if err != nil {
-				return nil, fmt.Errorf("Could not start sass compiler for file %s: %s", filename, err)
+				return fmt.Errorf("Could not start sass compiler for file %s: %s", filename, err)
 			}
 			if err = comp.Run(); err != nil {
-				return nil, fmt.Errorf("Could not generate stylesheet %s: %s", filename, err)
+				return fmt.Errorf("Could not generate stylesheet %s: %s", filename, err)
 			}
 		} else if strings.HasSuffix(filename, ".css") {
 			out, err := os.Create("static/css/" + filename)
 			if err != nil {
-				return nil, fmt.Errorf("Could not open style outfile %s: %s", filename, err)
+				return fmt.Errorf("Could not open style outfile %s: %s", filename, err)
 			}
 			_, err = io.Copy(out, in)
 			if err != nil {
-				return nil, fmt.Errorf("Could not copy stylesheet %s: %s", filename, err)
+				return fmt.Errorf("Could not copy stylesheet %s: %s", filename, err)
 			}
 		} else {
 			log.Printf("Skipping stylesheet %s, don't know how to handle", filename)
@@ -103,8 +129,7 @@ func newServer() (*server, error) {
 		}
 		log.Printf("Loaded stylesheet %s", filename)
 	}
-
-	return s, nil
+	return nil
 }
 
 func (s *server) logRequest(req *http.Request) {
@@ -122,19 +147,7 @@ func (s *server) router(res http.ResponseWriter, req *http.Request) {
 
 	for _, p := range s.pages {
 		if p.Slug == slug {
-			res.Header().Add("content-type", "text/html")
-
-			contents, err := p.render(s.fullPostTpl)
-			if err != nil {
-				s.errorInRequest(res, req, err)
-			}
-
-			page, err := s.createPage(p.Metadata.Title, contents)
-			if err != nil {
-				s.errorInRequest(res, req, err)
-			}
-
-			res.Write([]byte(page))
+			s.renderPage(p, res, req)
 			return
 		}
 	}
@@ -156,6 +169,19 @@ func (s *server) createPage(title, contents string) (string, error) {
 	return s.pageTpl.Exec(ctx)
 }
 
+func (s *server) renderPage(p *Page, res http.ResponseWriter, req *http.Request) {
+	res.Header().Add("content-type", "text/html")
+	contents, err := p.render(s.fullPostTpl)
+	if err != nil {
+		s.errorInRequest(res, req, err)
+	}
+	page, err := s.createPage(p.Metadata.Title, contents)
+	if err != nil {
+		s.errorInRequest(res, req, err)
+	}
+	res.Write([]byte(page))
+}
+
 func (s *server) homePage(res http.ResponseWriter, req *http.Request) {
 	res.Header().Add("content-type", "text/html")