Exact page matches in search

search.go

@@ -18,6 +18,10 @@ import (
 // section header still reports the true total so the user knows more exist.
 const searchSectionCap = 10
 
+// exactNameScore is the score scoreName assigns to a whole-name exact match.
+// handleSearch peels these into the promoted "Exact Match" section.
+const exactNameScore = 1000
+
 type searchResult struct {
 	Name  string
 	URL   string
@@ -32,8 +36,11 @@ type searchPageData struct {
 	Title    string
 	EditMode bool
 	Query    string
-	Pages    []searchResult
-	Files    []searchResult
+	// Exact holds page(s) whose name equals the query exactly, promoted to
+	// their own section above the fuzzy matches.
+	Exact []searchResult
+	Pages []searchResult
+	Files []searchResult
 	// PageTotal/FileTotal are the true match totals; Pages/Files are capped at
 	// searchSectionCap for rendering.
 	PageTotal    int
@@ -101,6 +108,15 @@ func (h *handler) handleSearch(w http.ResponseWriter, r *http.Request) {
 	pages, builtAt := searchWiki(query)
 	files := searchFiles(query)
 
+	// searchWiki sorts by score desc, so exact-name matches (score 1000) are
+	// at the front; peel them into their own section and drop them from the
+	// fuzzy page list so they aren't shown twice.
+	var exact []searchResult
+	for len(pages) > 0 && pages[0].Score == exactNameScore {
+		exact = append(exact, pages[0])
+		pages = pages[1:]
+	}
+
 	title := "Search"
 	if query != "" {
 		title = "Search: " + query
@@ -108,6 +124,7 @@ func (h *handler) handleSearch(w http.ResponseWriter, r *http.Request) {
 	data := searchPageData{
 		Title:        title,
 		Query:        query,
+		Exact:        exact,
 		Pages:        capResults(pages),
 		Files:        capResults(files),
 		PageTotal:    len(pages),
@@ -242,7 +259,7 @@ func fileURL(relPath string) string {
 // large file volumes don't pay the edit-distance cost per query.
 func scoreName(nameLower string, nameTokens []string, qLower string, qTokens []string, fuzzy bool) int {
 	if nameLower == qLower {
-		return 1000
+		return exactNameScore
 	}
 	score := 0
 	for _, qt := range qTokens {