Add Android autofill service packaging

autofillcache/cache.go

@@ -0,0 +1,87 @@
+package autofillcache
+
+import (
+	"encoding/json"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"git.julianfamily.org/keepassgo/vault"
+)
+
+type Entry struct {
+	ID       string   `json:"id"`
+	Title    string   `json:"title"`
+	Username string   `json:"username"`
+	Password string   `json:"password"`
+	URL      string   `json:"url"`
+	Host     string   `json:"host"`
+	Path     []string `json:"path,omitempty"`
+}
+
+type File struct {
+	UpdatedAt string  `json:"updatedAt"`
+	Entries   []Entry `json:"entries"`
+}
+
+func Build(model vault.Model, now time.Time) File {
+	entries := make([]Entry, 0, len(model.Entries))
+	for _, item := range model.Entries {
+		host := normalizeHost(item.URL)
+		if host == "" {
+			continue
+		}
+		if strings.TrimSpace(item.Username) == "" || strings.TrimSpace(item.Password) == "" {
+			continue
+		}
+		entries = append(entries, Entry{
+			ID:       item.ID,
+			Title:    item.Title,
+			Username: item.Username,
+			Password: item.Password,
+			URL:      item.URL,
+			Host:     host,
+			Path:     append([]string(nil), item.Path...),
+		})
+	}
+	return File{
+		UpdatedAt: now.UTC().Format(time.RFC3339),
+		Entries:   entries,
+	}
+}
+
+func Write(path string, model vault.Model, now time.Time) error {
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(Build(model, now), "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0o600)
+}
+
+func Clear(path string) error {
+	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	return nil
+}
+
+func normalizeHost(raw string) string {
+	value := strings.TrimSpace(raw)
+	if value == "" {
+		return ""
+	}
+	if !strings.Contains(value, "://") {
+		value = "https://" + value
+	}
+	parsed, err := url.Parse(value)
+	if err != nil {
+		return ""
+	}
+	host := strings.TrimSpace(parsed.Hostname())
+	return strings.ToLower(host)
+}