From da2ac0ab385b05cbcc2dacfcfcd107a1e518ee50 Mon Sep 17 00:00:00 2001
From: Simone Gotti <simone.gotti@gmail.com>
Date: Tue, 30 Apr 2019 16:24:04 +0200
Subject: [PATCH] util: add path functions

add IsParentPath and IsSameOrParent path functions and related tests
---
 internal/util/path.go      | 22 ++++++++++++
 internal/util/path_test.go | 68 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+)
 create mode 100644 internal/util/path_test.go

diff --git a/internal/util/path.go b/internal/util/path.go
index 4f41bb4..47266ab 100644
--- a/internal/util/path.go
+++ b/internal/util/path.go
@@ -16,6 +16,7 @@ package util
 
 import (
 	"path"
+	"strings"
 )
 
 // PathHierarchy return a slice of paths from the base path (root included as . or / ).
@@ -51,3 +52,24 @@ func PathList(p string) []string {
 	}
 	return paths
 }
+
+// IsParentPath returns if the provided parent is parent of p
+// parent and p paths must use slash "/" separators and must be absolute paths
+func IsParentPath(parent, p string) bool {
+	// add ending / to avoid names with common prefix, like:
+	// /path/to
+	// /path/t
+	if !strings.HasSuffix(parent, "/") {
+		parent = parent + "/"
+	}
+	return strings.Contains(p, parent)
+}
+
+// IsParentPath returns if the provided parent the same path as p or a parent of p
+// parent and p paths must use slash "/" separators
+func IsSameOrParentPath(parent, p string) bool {
+	if parent == p {
+		return true
+	}
+	return IsParentPath(parent, p)
+}
diff --git a/internal/util/path_test.go b/internal/util/path_test.go
new file mode 100644
index 0000000..60a8825
--- /dev/null
+++ b/internal/util/path_test.go
@@ -0,0 +1,68 @@
+// Copyright 2019 Sorint.lab
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package util
+
+import "testing"
+
+func TestIsParentPath(t *testing.T) {
+	tests := []struct {
+		parent string
+		p      string
+		ok     bool
+	}{
+		{"/", "/a", true},
+		{"/a", "/a", false},
+		{"/path/to", "/path/to/file", true},
+		{"/path/to/", "/path/to/file", true},
+		{"/path/to/f", "/path/to/file", false},
+		{"/path/t", "/path/to/file", false},
+	}
+
+	for _, tt := range tests {
+		t.Run("test is parent path", func(t *testing.T) {
+			ok := IsParentPath(tt.parent, tt.p)
+			if ok != tt.ok {
+				t.Errorf("got %t but wanted: %t a: %v, b: %v", ok, tt.ok, tt.parent, tt.p)
+			}
+		})
+	}
+}
+
+func TestIsSameOrParentPath(t *testing.T) {
+	tests := []struct {
+		parent string
+		p      string
+		ok     bool
+	}{
+		{"/", "/a", true},
+		{"/a", "/a", true},
+		{"/path/to", "/path/to/file", true},
+		{"/path/to/", "/path/to/file", true},
+		{"/path/to/f", "/path/to/file", false},
+		{"/path/t", "/path/to/file", false},
+		{"/path/to/file", "/path/to/file", true},
+		{"/path/to/file", "/path/to/file2", false},
+		{"/path/to/file", "/path/to/fil", false},
+	}
+
+	for _, tt := range tests {
+		t.Run("test is parent path", func(t *testing.T) {
+			ok := IsSameOrParentPath(tt.parent, tt.p)
+			if ok != tt.ok {
+				t.Errorf("got %t but wanted: %t a: %v, b: %v", ok, tt.ok, tt.parent, tt.p)
+			}
+		})
+	}
+}