add warnings for exceeding metadata character length

README.md

@@ -14,8 +14,13 @@ I built this to greatly simplify the process of getting my full-quality livestre
 $ vodular
 New config file created (config.toml). Please edit this file before running again!
 ```
+The directory which holds your configuration file and templates varies,
+depending on platform:
+- **Linux:** `~/.config/vodular/templates`
+- **macOS:** `~/Library/Application Support/vodular/templates`
+- **Windows:** `%AppData%/vodular/templates`
 
-2. Edit configuration file as necessary (You will need to create a [YouTube Data API v3](https://developers.google.com/youtube/v3) service and provide its credentials here).
+2. Edit your configuration file as necessary (You will need to create a [YouTube Data API v3](https://developers.google.com/youtube/v3) service and provide its credentials here).
 **IMPORTANT:** `config.toml` contains very sensitive credentials. Do not share this file with anyone.
 
 3. Initialise a VOD directory:
@@ -63,10 +68,11 @@ url = 'https://example.org'
 ```
 
 ## Templates
-Template files can be created at `templates/title.txt`,
-`template/description.txt`, and `templates/tags.txt` respectively. These
-files can use Go's [text template format](https://pkg.go.dev/text/template) to
-customise VOD metadata on upload.
+There are three template files, `title.txt`, `description.txt`, and `tags.txt`,
+which can be created in `/path/to/vodular/templates`. These templates can be
+created and tweaked to customise your VOD metadata on upload. They are enhanced
+with Go's [template format](https://pkg.go.dev/text/template) to inject
+information provided in `metadata.toml`, and other neat functionality!
 
 You can use the following data in templates:
 - **`.Title`:** The title of the stream.

main.go

@@ -26,7 +26,9 @@ import (
 //go:embed res/help.txt
 var helpText string
 
-const segmentExtension = "mkv"
+const SEGMENT_EXTENSION = "mkv"
+const MAX_TITLE_LEN = 100
+const MAX_DESCRIPTION_LEN = 5000
 
 func showHelp() {
 	fmt.Println(helpText)
@@ -194,7 +196,7 @@ func main() {
 	}
 
 	// scan for VOD segments
-	vodFiles, err := scanner.ScanSegments(metadata.FootageDir, segmentExtension)
+	vodFiles, err := scanner.ScanSegments(metadata.FootageDir, SEGMENT_EXTENSION)
 	if err != nil {
 		log.Fatalf("Failed to fetch VOD filenames: %v", err)
 		os.Exit(1)
@@ -202,7 +204,7 @@ func main() {
 	if len(vodFiles) == 0 {
 		log.Fatalf(
 			"Directory contained no VOD files (expecting .%s)",
-			segmentExtension,
+			SEGMENT_EXTENSION,
 		)
 		os.Exit(1)
 	}
@@ -221,21 +223,35 @@ func main() {
 		log.Fatalf("Failed to build video template: %v", err)
 		os.Exit(1)
 	}
+	title, err := yt.BuildTemplate(video, templates.Title)
+	if err != nil {
+		log.Fatalf("Failed to build video title: %v", err)
+		os.Exit(1)
+	}
+	description, err := yt.BuildTemplate(video, templates.Description)
+	if err != nil {
+		log.Fatalf("Failed to build video description: %v", err)
+		os.Exit(1)
+	}
+	if len(title) > 100 {
+		log.Fatalf(
+			"Video title length exceeds %d characters (%d). YouTube may reject this!",
+			MAX_TITLE_LEN,
+			len(video.Title),
+		)
+	}
+	if len(description) > 5000 {
+		log.Fatalf(
+			"Video description length exceeds %d characters (%d). YouTube may reject this!",
+			MAX_DESCRIPTION_LEN,
+			len(description),
+		)
+	}
 	if verbose {
 		enc := json.NewEncoder(os.Stdout)
 		fmt.Printf("\nVideo template: ")
 		enc.Encode(video)
 
-		title, err := yt.BuildTemplate(video, templates.Title)
-		if err != nil {
-			log.Fatalf("Failed to build video title: %v", err)
-			os.Exit(1)
-		}
-		description, err := yt.BuildTemplate(video, templates.Description)
-		if err != nil {
-			log.Fatalf("Failed to build video description: %v", err)
-			os.Exit(1)
-		}
 		fmt.Printf(
 			"\n================================\n\n" +
 			"< TITLE >\n%s\n\n" +
@@ -317,6 +333,7 @@ func main() {
 	log.Print("Video uploaded successfully!")
 
 	// update metadata to reflect VOD is uploaded
+	// TODO: rather than a boolean flag, link to actual video
 	metadata.Uploaded = true
 	err = scanner.WriteMetadata(directory, metadata)
 	if err != nil {

scanner/scanner.go

@@ -51,6 +51,7 @@ func ScanSegments(directory string, extension string) ([]string, error) {
 
 	for _, item := range entries {
 		if item.IsDir() { continue }
+		if strings.HasPrefix(item.Name(), ".") { continue }
 		if !strings.HasSuffix(item.Name(), "." + extension) { continue }
 		if strings.HasSuffix(item.Name(), "-fullvod." + extension) { continue }
 		files = append(files, item.Name())