feat: restructure code; add size and ext checks (#39)

- Refractor code
- Add file size and extension checkers
- Change repair workflow to use zurg

internal/config/misc.go

@@ -0,0 +1,75 @@
+package config
+
+import (
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func (c *Config) IsAllowedFile(filename string) bool {
+	ext := strings.ToLower(filepath.Ext(filename))
+	if ext == "" {
+		return false
+	}
+	// Remove the leading dot
+	ext = ext[1:]
+
+	for _, allowed := range c.AllowedExt {
+		if ext == allowed {
+			return true
+		}
+	}
+	return false
+}
+
+func getDefaultExtensions() []string {
+	videoExts := strings.Split("YUV,WMV,WEBM,VOB,VIV,SVI,ROQ,RMVB,RM,OGV,OGG,NSV,MXF,MPG,MPEG,M2V,MP2,MPE,MPV,MP4,M4P,M4V,MOV,QT,MNG,MKV,FLV,DRC,AVI,ASF,AMV,MKA,F4V,3GP,3G2,DIVX,X264,X265", ",")
+	musicExts := strings.Split("MP3,WAV,FLAC,AAC,OGG,WMA,AIFF,ALAC,M4A,APE,AC3,DTS,M4P,MID,MIDI,MKA,MP2,MPA,RA,VOC,WV,AMR", ",")
+
+	// Combine both slices
+	allExts := append(videoExts, musicExts...)
+
+	// Convert to lowercase
+	for i, ext := range allExts {
+		allExts[i] = strings.ToLower(ext)
+	}
+
+	// Remove duplicates
+	seen := make(map[string]bool)
+	var unique []string
+
+	for _, ext := range allExts {
+		if !seen[ext] {
+			seen[ext] = true
+			unique = append(unique, ext)
+		}
+	}
+
+	sort.Strings(unique)
+	return unique
+}
+
+func parseSize(sizeStr string) (int64, error) {
+	sizeStr = strings.ToUpper(strings.TrimSpace(sizeStr))
+
+	// Absolute size-based cache
+	multiplier := 1.0
+	if strings.HasSuffix(sizeStr, "GB") {
+		multiplier = 1024 * 1024 * 1024
+		sizeStr = strings.TrimSuffix(sizeStr, "GB")
+	} else if strings.HasSuffix(sizeStr, "MB") {
+		multiplier = 1024 * 1024
+		sizeStr = strings.TrimSuffix(sizeStr, "MB")
+	} else if strings.HasSuffix(sizeStr, "KB") {
+		multiplier = 1024
+		sizeStr = strings.TrimSuffix(sizeStr, "KB")
+	}
+
+	size, err := strconv.ParseFloat(sizeStr, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	return int64(size * multiplier), nil
+}