Reworked functions to be more concise (e.g. now getNewFile and getNextFile work with or without sortOrder)

cmd/files.go

@@ -30,7 +30,7 @@ import (
 )
 
 var (
-	ErrNoImagesFound = fmt.Errorf("no supported image formats found")
+	ErrNoImagesFound = fmt.Errorf("no supported image formats found which match all criteria")
 	extensions       = [6]string{".jpg", ".jpeg", ".png", ".gif", ".webp", ".bmp"}
 )
 
@@ -107,6 +107,9 @@ func humanReadableSize(bytes int) string {
 
 func getImageDimensions(path string) (string, error) {
 	file, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
 	defer file.Close()
 
 	myImage, _, err := image.DecodeConfig(file)
@@ -200,60 +203,60 @@ func appendPaths(path string, files *Files, filters *Filters, stats *Stats) erro
 	return nil
 }
 
-func getFirstFile(p *Path) (string, error) {
+func getNewFile(paths []string, filters *Filters, sortOrder string, re regexp.Regexp, fileCache *[]string) (string, error) {
-	p.Number = 1
+	filePath, err := pickFile(paths, filters, sortOrder, fileCache)
+	if err != nil {
+		return "", nil
+	}
 
-	fileName, err := tryExtensions(p)
+	path, err := splitPath(filePath, re)
 	if err != nil {
 		return "", err
 	}
 
-	return fileName, nil
+	path.Number = 1
-}
 
-func getLastFile(p *Path) (string, error) {
+	switch {
-	var fileName string
+	case sortOrder == "asc":
-	var err error
+		filePath, err = tryExtensions(path)
-
-	p.Number = 1
-
-	for {
-		p.Increment()
-
-		fileName, err = tryExtensions(p)
 		if err != nil {
 			return "", err
 		}
+	case sortOrder == "desc":
+		for {
+			path.Increment()
 
-		if fileName == "" {
+			filePath, err = tryExtensions(path)
-			p.Decrement()
-
-			fileName, err = tryExtensions(p)
 			if err != nil {
 				return "", err
 			}
 
-			break
+			if filePath == "" {
+				path.Decrement()
+
+				filePath, err = tryExtensions(path)
+				if err != nil {
+					return "", err
+				}
+
+				break
+			}
 		}
 	}
 
-	return fileName, nil
+	return filePath, nil
 }
 
-func getNextFile(p *Path) (string, error) {
+func getNextFile(p *Path, sortOrder string) (string, error) {
-	p.Increment()
+	switch {
-
+	case sortOrder == "asc":
-	fileName, err := tryExtensions(p)
+		p.Increment()
-	if err != nil {
+	case sortOrder == "desc":
-		return "", err
+		p.Decrement()
+	default:
+		return "", nil
 	}
 
-	return fileName, err
-}
-
-func getPreviousFile(p *Path) (string, error) {
-	p.Decrement()
-
 	fileName, err := tryExtensions(p)
 	if err != nil {
 		return "", err
@@ -497,6 +500,9 @@ func pickFile(args []string, filters *Filters, sort string, fileCache *[]string)
 	}
 
 	fileCount := len(fileList)
+	if fileCount == 0 {
+		return "", ErrNoImagesFound
+	}
 
 	r := rand.Intn(fileCount - 1)
 

cmd/version.go

@@ -10,7 +10,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var Version = "0.21.1"
+var Version = "0.22.0"
 
 func init() {
 	rootCmd.AddCommand(versionCmd)

cmd/web.go

@@ -31,19 +31,11 @@ type Filters struct {
 }
 
 func (f *Filters) IsEmpty() bool {
-	if !(f.HasIncludes() && f.HasExcludes()) {
+	return !(f.HasIncludes() && f.HasExcludes())
-		return true
-	}
-
-	return false
 }
 
 func (f *Filters) HasIncludes() bool {
-	if len(f.Includes) == 0 {
+	return len(f.Includes) != 0
-		return false
-	}
-
-	return true
 }
 
 func (f *Filters) GetIncludes() string {
@@ -51,11 +43,7 @@ func (f *Filters) GetIncludes() string {
 }
 
 func (f *Filters) HasExcludes() bool {
-	if len(f.Excludes) == 0 {
+	return len(f.Excludes) != 0
-		return false
-	}
-
-	return true
 }
 
 func (f *Filters) GetExcludes() string {
@@ -130,19 +118,45 @@ func generateQueryParams(filters *Filters, sort string) string {
 	return ""
 }
 
-func stripQueryParams(inUrl string) (string, error) {
+func stripQueryParams(u string) (string, error) {
-	url, err := url.Parse(inUrl)
+	uri, err := url.Parse(u)
 	if err != nil {
 		return "", err
 	}
 
-	url.RawQuery = ""
+	uri.RawQuery = ""
 
-	if runtime.GOOS == "windows" {
+	escapedUri, err := url.QueryUnescape(uri.String())
-		return strings.TrimPrefix(url.String(), "/"), nil
+	if err != nil {
+		return "", err
 	}
 
-	return url.String(), nil
+	if runtime.GOOS == "windows" {
+		return strings.TrimPrefix(escapedUri, "/"), nil
+	}
+
+	return escapedUri, nil
+}
+
+func createFilters(includes, excludes []string) Filters {
+	filters := Filters{}
+
+	if Filter {
+		filters.Includes = includes
+		filters.Excludes = excludes
+	}
+
+	return filters
+}
+
+func generateFilePath(filePath string) string {
+	htmlBody := PREFIX
+	if runtime.GOOS == "windows" {
+		htmlBody += "/"
+	}
+	htmlBody += filePath
+
+	return htmlBody
 }
 
 func refererToUri(referer string) string {
@@ -160,6 +174,11 @@ func serveHtml(w http.ResponseWriter, r *http.Request, filePath, dimensions stri
 
 	w.Header().Add("Content-Type", "text/html")
 
+	filters := Filters{}
+	if Filter {
+		filters = createFilters(splitQueryParams(r.URL.Query().Get("include")), splitQueryParams(r.URL.Query().Get("exclude")))
+	}
+
 	htmlBody := `<html lang="en">
   <head>
     <style>
@@ -171,31 +190,10 @@ func serveHtml(w http.ResponseWriter, r *http.Request, filePath, dimensions stri
 	htmlBody += `</title>
   </head>
   <body>
-`
+    <a href="/`
-	switch {
+	htmlBody += generateQueryParams(&filters, r.URL.Query().Get("sort"))
-	case Filter && Sort:
+	htmlBody += `"><img src="`
-		htmlBody += fmt.Sprintf(`    <a href="/?include=%v&exclude=%v&sort=%v"><img src="`,
+	htmlBody += generateFilePath(filePath)
-			r.URL.Query().Get("include"),
-			r.URL.Query().Get("exclude"),
-			r.URL.Query().Get("sort"),
-		)
-	case Filter && !Sort:
-		htmlBody += fmt.Sprintf(`    <a href="/?include=%v&exclude=%v"><img src="`,
-			r.URL.Query().Get("include"),
-			r.URL.Query().Get("exclude"),
-		)
-	case !Filter && Sort:
-		htmlBody += fmt.Sprintf(`    <a href="/?sort=%v"><img src="`,
-			r.URL.Query().Get("sort"),
-		)
-	default:
-		htmlBody += `    <a href="/"><img src="`
-	}
-	htmlBody += PREFIX
-	if runtime.GOOS == "windows" {
-		htmlBody += "/"
-	}
-	htmlBody += filePath
 	htmlBody += `"></img></a>
   </body>
 </html>`
@@ -209,12 +207,7 @@ func serveHtml(w http.ResponseWriter, r *http.Request, filePath, dimensions stri
 }
 
 func serveStaticFile(w http.ResponseWriter, r *http.Request, paths []string) error {
-	strippedUrl, err := stripQueryParams(r.URL.Path)
+	prefixedFilePath, err := stripQueryParams(r.URL.Path)
-	if err != nil {
-		return err
-	}
-
-	prefixedFilePath, err := url.QueryUnescape(strippedUrl)
 	if err != nil {
 		return err
 	}
@@ -279,54 +272,30 @@ func serveHtmlHandler(paths []string, re regexp.Regexp, fileCache *[]string) app
 			return err
 		}
 
-		filters := Filters{}
+		filters := createFilters(splitQueryParams(r.URL.Query().Get("include")), splitQueryParams(r.URL.Query().Get("exclude")))
-		if Filter {
-			filters.Includes = splitQueryParams(r.URL.Query().Get("include"))
-			filters.Excludes = splitQueryParams(r.URL.Query().Get("exclude"))
-		}
 
-		sortOrder := ""
+		sortOrder := r.URL.Query().Get("sort")
-		if Sort {
-			sortOrder = r.URL.Query().Get("sort")
-		}
 
 		switch {
-		case r.URL.Path == "/" && sortOrder == "asc" && refererUri != "":
+		case r.URL.Path == "/" && refererUri != "":
-			query, err := url.QueryUnescape(refererUri)
+			path, err := splitPath(refererUri, re)
 			if err != nil {
 				return err
 			}
 
-			path, err := splitPath(query, re)
+			filePath, err := getNextFile(path, sortOrder)
-			if err != nil {
-				return err
-			}
-
-			filePath, err := getNextFile(path)
 			if err != nil {
 				return err
 			}
 
 			if filePath == "" {
-				filePath, err = pickFile(paths, &filters, sortOrder, fileCache)
+				filePath, err = getNewFile(paths, &filters, sortOrder, re, fileCache)
 				switch {
 				case err != nil && err == ErrNoImagesFound:
 					http.NotFound(w, r)
-
-					return nil
 				case err != nil:
 					return err
 				}
-
-				path, err := splitPath(filePath, re)
-				if err != nil {
-					return err
-				}
-
-				filePath, err = getFirstFile(path)
-				if err != nil {
-					return err
-				}
 			}
 
 			newUrl := fmt.Sprintf("http://%v%v%v",
@@ -335,109 +304,12 @@ func serveHtmlHandler(paths []string, re regexp.Regexp, fileCache *[]string) app
 				generateQueryParams(&filters, sortOrder),
 			)
 			http.Redirect(w, r, newUrl, RedirectStatusCode)
-		case r.URL.Path == "/" && sortOrder == "asc" && refererUri == "":
+		case r.URL.Path == "/" && refererUri == "":
-			filePath, err := pickFile(paths, &filters, sortOrder, fileCache)
+			filePath, err := getNewFile(paths, &filters, sortOrder, re, fileCache)
-			if err != nil && err == ErrNoImagesFound {
+			switch {
-				notFound(w, r)
+			case err != nil && err == ErrNoImagesFound:
-
+				http.NotFound(w, r)
-				return nil
+			case err != nil:
-			} else if err != nil {
-				return err
-			}
-
-			path, err := splitPath(filePath, re)
-			if err != nil {
-				return err
-			}
-
-			filePath, err = getFirstFile(path)
-			if err != nil {
-				return err
-			}
-
-			newUrl := fmt.Sprintf("http://%v%v%v",
-				r.Host,
-				preparePath(filePath),
-				generateQueryParams(&filters, sortOrder),
-			)
-			http.Redirect(w, r, newUrl, RedirectStatusCode)
-		case r.URL.Path == "/" && sortOrder == "desc" && refererUri != "":
-			query, err := url.QueryUnescape(refererUri)
-			if err != nil {
-				return err
-			}
-
-			path, err := splitPath(query, re)
-			if err != nil {
-				return err
-			}
-
-			filePath, err := getPreviousFile(path)
-			if err != nil {
-				return err
-			}
-
-			if filePath == "" {
-				filePath, err = pickFile(paths, &filters, sortOrder, fileCache)
-				switch {
-				case err != nil && err == ErrNoImagesFound:
-					notFound(w, r)
-
-					return nil
-				case err != nil:
-					return err
-				}
-
-				path, err := splitPath(filePath, re)
-				if err != nil {
-					return err
-				}
-
-				filePath, err = getLastFile(path)
-				if err != nil {
-					return err
-				}
-			}
-
-			newUrl := fmt.Sprintf("http://%v%v%v",
-				r.Host,
-				preparePath(filePath),
-				generateQueryParams(&filters, sortOrder),
-			)
-			http.Redirect(w, r, newUrl, RedirectStatusCode)
-		case r.URL.Path == "/" && sortOrder == "desc" && refererUri == "":
-			filePath, err := pickFile(paths, &filters, sortOrder, fileCache)
-			if err != nil && err == ErrNoImagesFound {
-				notFound(w, r)
-
-				return nil
-			} else if err != nil {
-				return err
-			}
-
-			path, err := splitPath(filePath, re)
-			if err != nil {
-				return err
-			}
-
-			filePath, err = getLastFile(path)
-			if err != nil {
-				return err
-			}
-
-			newUrl := fmt.Sprintf("http://%v%v%v",
-				r.Host,
-				preparePath(filePath),
-				generateQueryParams(&filters, sortOrder),
-			)
-			http.Redirect(w, r, newUrl, RedirectStatusCode)
-		case r.URL.Path == "/":
-			filePath, err := pickFile(paths, &filters, sortOrder, fileCache)
-			if err != nil && err == ErrNoImagesFound {
-				notFound(w, r)
-
-				return nil
-			} else if err != nil {
 				return err
 			}
 
@@ -461,8 +333,6 @@ func serveHtmlHandler(paths []string, re regexp.Regexp, fileCache *[]string) app
 
 			if !exists {
 				notFound(w, r)
-
-				return nil
 			}
 
 			image, err := isImage(filePath)
@@ -471,8 +341,6 @@ func serveHtmlHandler(paths []string, re regexp.Regexp, fileCache *[]string) app
 			}
 			if !image {
 				notFound(w, r)
-
-				return nil
 			}
 
 			dimensions, err := getImageDimensions(filePath)