+Benutzer filter, u. Spalte

helpers/imports/common.go

@@ -0,0 +1,88 @@
+package imports
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"sort"
+	"strings"
+	"time"
+)
+
+const importDirName = "import"
+
+var importNamePattern = regexp.MustCompile(`^(\d{4})-(\d{2})(?:-(\d{2}))?-MUSENALM-(DATA|FILES)`)
+
+type ImportCandidate struct {
+	Path  string
+	IsZip bool
+}
+
+func FindLatestImport(kind string) (*ImportCandidate, error) {
+	dirEntries, err := os.ReadDir(importDirName)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	want := "MUSENALM-" + strings.ToUpper(kind)
+	type candidate struct {
+		name string
+		ts   time.Time
+	}
+	candidates := []candidate{}
+	for _, entry := range dirEntries {
+		name := entry.Name()
+		matches := importNamePattern.FindStringSubmatch(name)
+		if matches == nil {
+			continue
+		}
+		if !strings.Contains(strings.ToUpper(name), want) {
+			continue
+		}
+		year := matches[1]
+		month := matches[2]
+		day := matches[3]
+		if day == "" {
+			day = "01"
+		}
+		ts, err := time.Parse("2006-01-02", year+"-"+month+"-"+day)
+		if err != nil {
+			continue
+		}
+		candidates = append(candidates, candidate{name: name, ts: ts})
+	}
+
+	if len(candidates) == 0 {
+		return nil, nil
+	}
+
+	sort.Slice(candidates, func(i, j int) bool {
+		if candidates[i].ts.Equal(candidates[j].ts) {
+			return candidates[i].name < candidates[j].name
+		}
+		return candidates[i].ts.Before(candidates[j].ts)
+	})
+	latest := candidates[len(candidates)-1].name
+	path := filepath.Join(importDirName, latest)
+	info, err := os.Stat(path)
+	if err != nil {
+		return nil, err
+	}
+
+	if info.IsDir() {
+		return &ImportCandidate{Path: path, IsZip: false}, nil
+	}
+	if strings.HasSuffix(strings.ToLower(latest), ".zip") {
+		return &ImportCandidate{Path: path, IsZip: true}, nil
+	}
+
+	return &ImportCandidate{Path: path, IsZip: false}, nil
+}
+
+func HasImport(kind string) bool {
+	candidate, err := FindLatestImport(kind)
+	return err == nil && candidate != nil
+}