feat: v2 (#599)

Read https://github.com/filebrowser/filebrowser/pull/575.

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Former-commit-id: e032e0804dd051df86f42962de2b39caec5318b7

search/search.go

@@ -0,0 +1,62 @@
+package search
+
+import (
+	"os"
+	"strings"
+
+	"github.com/filebrowser/filebrowser/v2/rules"
+	"github.com/spf13/afero"
+)
+
+type searchOptions struct {
+	CaseSensitive bool
+	Conditions    []condition
+	Terms         []string
+}
+
+// Search searches for a query in a fs.
+func Search(fs afero.Fs, scope, query string, checker rules.Checker, found func(path string, f os.FileInfo) error) error {
+	search := parseSearch(query)
+
+	return afero.Walk(fs, scope, func(path string, f os.FileInfo, err error) error {
+		path = strings.TrimPrefix(path, "/")
+		path = strings.Replace(path, "\\", "/", -1)
+		
+		if !checker.Check(path) {
+			return nil
+		}
+
+		if !search.CaseSensitive {
+			path = strings.ToLower(path)
+		}
+
+		if !search.CaseSensitive {
+			path = strings.ToLower(path)
+		}
+
+		if len(search.Conditions) > 0 {
+			match := false
+
+			for _, t := range search.Conditions {
+				if t(path) {
+					match = true
+					break
+				}
+			}
+
+			if !match {
+				return nil
+			}
+		}
+
+		if len(search.Terms) > 0 {
+			for _, term := range search.Terms {
+				if strings.Contains(path, term) {
+					return found(strings.TrimPrefix(path, scope), f)
+				}
+			}
+		}
+
+		return nil
+	})
+}