Trim trailing '/' from CLI input for restore/details (#1175)

## Description

Use paths package to trim unescaped trailing '/' characters from input for Exchange mail and OneDrive folder names. Add tests for Exchange showing that the trimming also works properly if the folder name ends with '/'.

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [ ] 🐹 Trivial/Minor

## Issue(s)

* closes #1147 

## Test Plan

<!-- How will this be tested prior to merging.-->
- [x] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E

src/cli/utils/exchange.go

@@ -142,6 +142,8 @@ func IncludeExchangeRestoreDataSelectors(
 		return
 	}
 
+	opts.EmailFolder = trimFolderSlash(opts.EmailFolder)
+
 	// or add selectors for each type of data
 	AddExchangeInclude(sel, opts.Users, opts.ContactFolder, opts.Contact, sel.Contacts)
 	AddExchangeInclude(sel, opts.Users, opts.EmailFolder, opts.Email, sel.Mails)

src/cli/utils/flags.go

@@ -7,6 +7,7 @@ import (
 	"github.com/spf13/pflag"
 
 	"github.com/alcionai/corso/src/internal/common"
+	"github.com/alcionai/corso/src/pkg/path"
 )
 
 type PopulatedFlags map[string]struct{}
@@ -50,3 +51,16 @@ func IsValidBool(in string) bool {
 	_, err := strconv.ParseBool(in)
 	return err == nil
 }
+
+// trimFolderSlash takes a set of folder paths and returns a set of folder paths
+// with any unescaped trailing `/` characters removed.
+func trimFolderSlash(folders []string) []string {
+	res := make([]string, 0, len(folders))
+
+	for _, p := range folders {
+		// Use path package because it has logic to handle escaping already.
+		res = append(res, path.TrimTrailingSlash(p))
+	}
+
+	return res
+}

src/cli/utils/onedrive.go

@@ -87,6 +87,8 @@ func IncludeOneDriveRestoreDataSelectors(
 		return
 	}
 
+	opts.Paths = trimFolderSlash(opts.Paths)
+
 	if lp == 0 {
 		opts.Paths = selectors.Any()
 	}

src/cli/utils/testdata/opts.go

@@ -139,8 +139,38 @@ var (
 			},
 		},
 		{
-			Name:     "EmailsBySubject",
+			Name:     "EmailsFolderPrefixMatchTrailingSlash",
 			Expected: testdata.ExchangeEmailItems,
+			Opts: utils.ExchangeOpts{
+				EmailFolder: []string{testdata.ExchangeEmailInboxPath.Folder() + "/"},
+			},
+		},
+		{
+			Name: "EmailsFolderWithSlashPrefixMatch",
+			Expected: []details.DetailsEntry{
+				testdata.ExchangeEmailItems[1],
+				testdata.ExchangeEmailItems[2],
+			},
+			Opts: utils.ExchangeOpts{
+				EmailFolder: []string{testdata.ExchangeEmailBasePath2.Folder()},
+			},
+		},
+		{
+			Name: "EmailsFolderWithSlashPrefixMatchTrailingSlash",
+			Expected: []details.DetailsEntry{
+				testdata.ExchangeEmailItems[1],
+				testdata.ExchangeEmailItems[2],
+			},
+			Opts: utils.ExchangeOpts{
+				EmailFolder: []string{testdata.ExchangeEmailBasePath2.Folder() + "/"},
+			},
+		},
+		{
+			Name: "EmailsBySubject",
+			Expected: []details.DetailsEntry{
+				testdata.ExchangeEmailItems[0],
+				testdata.ExchangeEmailItems[1],
+			},
 			Opts: utils.ExchangeOpts{
 				EmailSender: "a-person",
 			},
@@ -180,8 +210,11 @@ var (
 			},
 		},
 		{
-			Name:     "MultipleMailShortRef",
+			Name: "MultipleMailShortRef",
-			Expected: testdata.ExchangeEmailItems,
+			Expected: []details.DetailsEntry{
+				testdata.ExchangeEmailItems[0],
+				testdata.ExchangeEmailItems[1],
+			},
 			Opts: utils.ExchangeOpts{
 				Email: []string{
 					testdata.ExchangeEmailItemPath1.ShortRef(),

src/pkg/path/path.go

@@ -145,7 +145,7 @@ func (pb *Builder) appendElements(escaped bool, elements []string) error {
 		tmp := e
 
 		if escaped {
-			tmp = trimTrailingSlash(tmp)
+			tmp = TrimTrailingSlash(tmp)
 			// If tmp was just the path separator then it will be empty now.
 			if len(tmp) == 0 {
 				continue
@@ -310,7 +310,7 @@ func (pb Builder) ToDataLayerOneDrivePath(
 // resource-specific type. If p does not match any resource-specific paths or
 // is malformed returns an error.
 func FromDataLayerPath(p string, isItem bool) (Path, error) {
-	p = trimTrailingSlash(p)
+	p = TrimTrailingSlash(p)
 	// If p was just the path separator then it will be empty now.
 	if len(p) == 0 {
 		return nil, errors.Errorf("logically empty path given: %s", p)
@@ -437,11 +437,11 @@ func validateEscapedElement(element string) error {
 	return nil
 }
 
-// trimTrailingSlash takes an escaped path element and returns an escaped path
+// TrimTrailingSlash takes an escaped path element and returns an escaped path
 // element with the trailing path separator character(s) removed if they were not
 // escaped. If there were no trailing path separator character(s) or the separator(s)
 // were escaped the input is returned unchanged.
-func trimTrailingSlash(element string) string {
+func TrimTrailingSlash(element string) string {
 	for len(element) > 0 && element[len(element)-1] == pathSeparator {
 		lastIdx := len(element) - 1
 		numSlashes := 0

src/pkg/selectors/selectors_reduce_test.go

@@ -92,7 +92,10 @@ func (suite *SelectorReduceSuite) TestReduce() {
 
 				return sel
 			},
-			expected: testdata.ExchangeEmailItems,
+			expected: []details.DetailsEntry{
+				testdata.ExchangeEmailItems[0],
+				testdata.ExchangeEmailItems[1],
+			},
 		},
 		{
 			name: "ExchangeMailReceivedTime",

src/pkg/selectors/testdata/details.go

@@ -36,6 +36,7 @@ func mustAppendPath(p path.Path, newElement string, isItem bool) path.Path {
 const (
 	ItemName1 = "item1"
 	ItemName2 = "item2"
+	ItemName3 = "item3"
 )
 
 var (
@@ -44,9 +45,11 @@ var (
 
 	ExchangeEmailInboxPath = mustParsePath("tenant-id/exchange/user-id/email/Inbox", false)
 	ExchangeEmailBasePath  = mustAppendPath(ExchangeEmailInboxPath, "subfolder", false)
-	ExchangeEmailBasePath2 = mustAppendPath(ExchangeEmailInboxPath, "othersubfolder", false)
+	ExchangeEmailBasePath2 = mustAppendPath(ExchangeEmailInboxPath, "othersubfolder/", false)
+	ExchangeEmailBasePath3 = mustAppendPath(ExchangeEmailBasePath2, "subsubfolder", false)
 	ExchangeEmailItemPath1 = mustAppendPath(ExchangeEmailBasePath, ItemName1, true)
 	ExchangeEmailItemPath2 = mustAppendPath(ExchangeEmailBasePath2, ItemName2, true)
+	ExchangeEmailItemPath3 = mustAppendPath(ExchangeEmailBasePath3, ItemName3, true)
 
 	ExchangeEmailItems = []details.DetailsEntry{
 		{
@@ -75,6 +78,19 @@ var (
 				},
 			},
 		},
+		{
+			RepoRef:   ExchangeEmailItemPath3.String(),
+			ShortRef:  ExchangeEmailItemPath3.ShortRef(),
+			ParentRef: ExchangeEmailItemPath3.ToBuilder().Dir().ShortRef(),
+			ItemInfo: details.ItemInfo{
+				Exchange: &details.ExchangeInfo{
+					ItemType: details.ExchangeMail,
+					Sender:   "another-person",
+					Subject:  "baz",
+					Received: Time2,
+				},
+			},
+		},
 	}
 
 	ExchangeContactsRootPath  = mustParsePath("tenant-id/exchange/user-id/contacts/contacts", false)