Make wiki title supports dashes and improve wiki name related features (#24143)

Close #7570


1. Clearly define the wiki path behaviors, see
`services/wiki/wiki_path.go` and tests
2. Keep compatibility with old contents
3. Allow to use dashes in titles, eg: "2000-01-02 Meeting record"
4. Add a "Pages" link in the dropdown, otherwise users can't go to the
Pages page easily.
5. Add a "View original git file" link in the Pages list, even if some
file names are broken, users still have a chance to edit or remove it,
without cloning the wiki repo to local.
6. Fix 500 error when the name contains prefix spaces.


This PR also introduces the ability to support sub-directories, but it
can't be done at the moment due to there are a lot of legacy wiki data,
which use "%2F" in file names.



![image](https://user-images.githubusercontent.com/2114189/232239004-3359d7b9-7bf3-4ff3-8446-bfb0e79645dd.png)


![image](https://user-images.githubusercontent.com/2114189/232239020-74b92c72-bf73-4377-a319-1c85609f82b1.png)

Co-authored-by: Giteabot <teabot@gitea.io>

Author: wxiaoguang

modules/git/repo_commit.go

@@ -84,6 +84,9 @@ func (repo *Repository) GetCommitByPath(relpath string) (*Commit, error) {
 	if err != nil {
 		return nil, err
 	}
+	if len(commits) == 0 {
+		return nil, ErrNotExist{ID: relpath}
+	}
 	return commits[0], nil
 }
 

options/locale/locale_en-US.ini

@@ -1791,6 +1791,7 @@ wiki.reserved_page = The wiki page name "%s" is reserved.
 wiki.pages = Pages
 wiki.last_updated = Last updated %s
 wiki.page_name_desc = Enter a name for this Wiki page. Some special names are: 'Home', '_Sidebar' and '_Footer'.
+wiki.original_git_entry_tooltip = View original Git file instead of using friendly link.
 
 activity = Activity
 activity.period.filter_label = Period:

routers/api/v1/repo/wiki.go

@@ -58,10 +58,10 @@ func NewWikiPage(ctx *context.APIContext) {
 		return
 	}
 
-	wikiName := wiki_service.NormalizeWikiName(form.Title)
+	wikiName := wiki_service.UserTitleToWebPath("", form.Title)
 
 	if len(form.Message) == 0 {
-		form.Message = fmt.Sprintf("Add '%s'", form.Title)
+		form.Message = fmt.Sprintf("Add %q", form.Title)
 	}
 
 	content, err := base64.StdEncoding.DecodeString(form.ContentBase64)
@@ -85,7 +85,7 @@ func NewWikiPage(ctx *context.APIContext) {
 	wikiPage := getWikiPage(ctx, wikiName)
 
 	if !ctx.Written() {
-		notification.NotifyNewWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, wikiName, form.Message)
+		notification.NotifyNewWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(wikiName), form.Message)
 		ctx.JSON(http.StatusCreated, wikiPage)
 	}
 }
@@ -127,15 +127,15 @@ func EditWikiPage(ctx *context.APIContext) {
 
 	form := web.GetForm(ctx).(*api.CreateWikiPageOptions)
 
-	oldWikiName := wiki_service.NormalizeWikiName(ctx.Params(":pageName"))
-	newWikiName := wiki_service.NormalizeWikiName(form.Title)
+	oldWikiName := wiki_service.WebPathFromRequest(ctx.Params(":pageName"))
+	newWikiName := wiki_service.UserTitleToWebPath("", form.Title)
 
 	if len(newWikiName) == 0 {
 		newWikiName = oldWikiName
 	}
 
 	if len(form.Message) == 0 {
-		form.Message = fmt.Sprintf("Update '%s'", newWikiName)
+		form.Message = fmt.Sprintf("Update %q", newWikiName)
 	}
 
 	content, err := base64.StdEncoding.DecodeString(form.ContentBase64)
@@ -153,14 +153,12 @@ func EditWikiPage(ctx *context.APIContext) {
 	wikiPage := getWikiPage(ctx, newWikiName)
 
 	if !ctx.Written() {
-		notification.NotifyEditWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, newWikiName, form.Message)
+		notification.NotifyEditWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(newWikiName), form.Message)
 		ctx.JSON(http.StatusOK, wikiPage)
 	}
 }
 
-func getWikiPage(ctx *context.APIContext, title string) *api.WikiPage {
-	title = wiki_service.NormalizeWikiName(title)
-
+func getWikiPage(ctx *context.APIContext, wikiName wiki_service.WebPath) *api.WikiPage {
 	wikiRepo, commit := findWikiRepoCommit(ctx)
 	if wikiRepo != nil {
 		defer wikiRepo.Close()
@@ -170,7 +168,7 @@ func getWikiPage(ctx *context.APIContext, title string) *api.WikiPage {
 	}
 
 	// lookup filename in wiki - get filecontent, real filename
-	content, pageFilename := wikiContentsByName(ctx, commit, title, false)
+	content, pageFilename := wikiContentsByName(ctx, commit, wikiName, false)
 	if ctx.Written() {
 		return nil
 	}
@@ -196,7 +194,7 @@ func getWikiPage(ctx *context.APIContext, title string) *api.WikiPage {
 	}
 
 	return &api.WikiPage{
-		WikiPageMetaData: convert.ToWikiPageMetaData(title, lastCommit, ctx.Repo.Repository),
+		WikiPageMetaData: convert.ToWikiPageMetaData(wikiName, lastCommit, ctx.Repo.Repository),
 		ContentBase64:    content,
 		CommitCount:      commitsCount,
 		Sidebar:          sidebarContent,
@@ -233,7 +231,7 @@ func DeleteWikiPage(ctx *context.APIContext) {
 	//   "404":
 	//     "$ref": "#/responses/notFound"
 
-	wikiName := wiki_service.NormalizeWikiName(ctx.Params(":pageName"))
+	wikiName := wiki_service.WebPathFromRequest(ctx.Params(":pageName"))
 
 	if err := wiki_service.DeleteWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, wikiName); err != nil {
 		if err.Error() == "file does not exist" {
@@ -244,7 +242,7 @@ func DeleteWikiPage(ctx *context.APIContext) {
 		return
 	}
 
-	notification.NotifyDeleteWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, wikiName)
+	notification.NotifyDeleteWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(wikiName))
 
 	ctx.Status(http.StatusNoContent)
 }
@@ -316,7 +314,7 @@ func ListWikiPages(ctx *context.APIContext) {
 			ctx.Error(http.StatusInternalServerError, "GetCommit", err)
 			return
 		}
-		wikiName, err := wiki_service.FilenameToName(entry.Name())
+		wikiName, err := wiki_service.GitPathToWebPath(entry.Name())
 		if err != nil {
 			if repo_model.IsErrWikiInvalidFileName(err) {
 				continue
@@ -361,7 +359,7 @@ func GetWikiPage(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 
 	// get requested pagename
-	pageName := wiki_service.NormalizeWikiName(ctx.Params(":pageName"))
+	pageName := wiki_service.WebPathFromRequest(ctx.Params(":pageName"))
 
 	wikiPage := getWikiPage(ctx, pageName)
 	if !ctx.Written() {
@@ -411,7 +409,7 @@ func ListPageRevisions(ctx *context.APIContext) {
 	}
 
 	// get requested pagename
-	pageName := wiki_service.NormalizeWikiName(ctx.Params(":pageName"))
+	pageName := wiki_service.WebPathFromRequest(ctx.Params(":pageName"))
 	if len(pageName) == 0 {
 		pageName = "Home"
 	}
@@ -502,9 +500,9 @@ func wikiContentsByEntry(ctx *context.APIContext, entry *git.TreeEntry) string {
 
 // wikiContentsByName returns the contents of a wiki page, along with a boolean
 // indicating whether the page exists. Writes to ctx if an error occurs.
-func wikiContentsByName(ctx *context.APIContext, commit *git.Commit, wikiName string, isSidebarOrFooter bool) (string, string) {
-	pageFilename := wiki_service.NameToFilename(wikiName)
-	entry, err := findEntryForFile(commit, pageFilename)
+func wikiContentsByName(ctx *context.APIContext, commit *git.Commit, wikiName wiki_service.WebPath, isSidebarOrFooter bool) (string, string) {
+	gitFilename := wiki_service.WebPathToGitPath(wikiName)
+	entry, err := findEntryForFile(commit, gitFilename)
 	if err != nil {
 		if git.IsErrNotExist(err) {
 			if !isSidebarOrFooter {
@@ -515,5 +513,5 @@ func wikiContentsByName(ctx *context.APIContext, commit *git.Commit, wikiName st
 		}
 		return "", ""
 	}
-	return wikiContentsByEntry(ctx, entry), pageFilename
+	return wikiContentsByEntry(ctx, entry), gitFilename
 }