Further improve counting of media uses

database.go

@@ -185,6 +185,10 @@ func (db *database) exec(query string, args ...interface{}) (sql.Result, error)
 }
 
 func (db *database) query(query string, args ...interface{}) (*sql.Rows, error) {
+	// Check if prepared cache should be skipped
+	if len(args) > 0 && args[0] == dbNoCache {
+		return db.db.Query(query, args[1:]...)
+	}
 	// Use prepared statement
 	st, _ := db.prepare(query)
 	if st != nil {
@@ -195,6 +199,10 @@ func (db *database) query(query string, args ...interface{}) (*sql.Rows, error)
 }
 
 func (db *database) queryRow(query string, args ...interface{}) (*sql.Row, error) {
+	// Check if prepared cache should be skipped
+	if len(args) > 0 && args[0] == dbNoCache {
+		return db.db.QueryRow(query, args[1:]...), nil
+	}
 	// Use prepared statement
 	st, _ := db.prepare(query)
 	if st != nil {

editorFiles.go

@@ -3,6 +3,8 @@ package main
 import (
 	"net/http"
 	"sort"
+
+	"github.com/thoas/go-funk"
 )
 
 func (a *goBlog) serveEditorFiles(w http.ResponseWriter, r *http.Request) {
@@ -15,12 +17,26 @@ func (a *goBlog) serveEditorFiles(w http.ResponseWriter, r *http.Request) {
 	sort.Slice(files, func(i, j int) bool {
 		return files[i].Time.After(files[j].Time)
 	})
+	// Find uses
+	fileNames, ok := funk.Map(files, func(f *mediaFile) string {
+		return f.Name
+	}).([]string)
+	if !ok {
+		a.serveError(w, r, "Failed to get file names", http.StatusInternalServerError)
+		return
+	}
+	uses, err := a.db.usesOfMediaFile(fileNames...)
+	if err != nil {
+		a.serveError(w, r, err.Error(), http.StatusInternalServerError)
+		return
+	}
 	// Serve HTML
 	blog := r.Context().Value(blogContextKey).(string)
 	a.render(w, r, templateEditorFiles, &renderData{
 		BlogString: blog,
 		Data: map[string]interface{}{
 			"Files": files,
+			"Uses":  uses,
 		},
 	})
 }

postsDb.go

@@ -471,15 +471,44 @@ func (d *database) allPublishedDates(blog string) (dates []publishedDate, err er
 	return
 }
 
-func (db *database) usesOfMediaFile(name string) (count int, err error) {
-	query := "select count(distinct path) from (select path from posts_fts where content match @fts_name union all select path from post_parameters where instr(value, @name) > 0)"
-	row, err := db.queryRow(query, sql.Named("fts_name", fmt.Sprintf("\"%s\"", name)), sql.Named("name", name))
-	if err != nil {
-		return 0, err
+const mediaUseSql = `
+with mediafiles (name) as (values %s)
+select name, count(path) as count from (
+    select distinct m.name, p.path
+    from mediafiles m, post_parameters p
+    where instr(p.value, m.name) > 0
+    union
+    select distinct m.name, p.path
+    from mediafiles m, posts_fts p
+    where p.content match '"' || m.name || '"'
+)
+group by name;
+`
+
+func (db *database) usesOfMediaFile(names ...string) (counts map[string]int, err error) {
+	sqlArgs := []interface{}{dbNoCache}
+	nameValues := ""
+	for i, n := range names {
+		if i > 0 {
+			nameValues += ", "
+		}
+		named := fmt.Sprintf("name%v", i)
+		nameValues += fmt.Sprintf("(@%s)", named)
+		sqlArgs = append(sqlArgs, sql.Named(named, n))
 	}
-	err = row.Scan(&count)
+	rows, err := db.query(fmt.Sprintf(mediaUseSql, nameValues), sqlArgs...)
 	if err != nil {
-		return 0, err
+		return nil, err
 	}
-	return count, nil
+	counts = map[string]int{}
+	var name string
+	var count int
+	for rows.Next() {
+		err = rows.Scan(&name, &count)
+		if err != nil {
+			return nil, err
+		}
+		counts[name] = count
+	}
+	return counts, nil
 }

postsDb_test.go

@@ -338,7 +338,10 @@ func Test_usesOfMediaFile(t *testing.T) {
 	}, &postCreationOptions{new: true})
 	require.NoError(t, err)
 
-	count, err := app.db.usesOfMediaFile("test.jpg")
+	counts, err := app.db.usesOfMediaFile("test.jpg")
 	require.NoError(t, err)
-	assert.Equal(t, 2, count)
+	assert.Len(t, counts, 1)
+	if assert.NotNil(t, counts["test.jpg"]) {
+		assert.Equal(t, 2, counts["test.jpg"])
+	}
 }

render.go

@@ -56,22 +56,21 @@ func (a *goBlog) initRendering() error {
 		"translations": a.postTranslations,
 		"shorturl":     a.shortPostURL,
 		// Others
-		"dateformat":    dateFormat,
-		"isodate":       isoDateFormat,
-		"unixtodate":    unixToLocalDateString,
-		"now":           localNowString,
-		"asset":         a.assetFileName,
-		"string":        a.ts.GetTemplateStringVariantFunc(),
-		"include":       a.includeRenderedTemplate,
-		"urlize":        urlize,
-		"sort":          sortedStrings,
-		"absolute":      a.getFullAddress,
-		"mentions":      a.db.getWebmentionsByAddress,
-		"geotitle":      a.geoTitle,
-		"geolink":       geoOSMLink,
-		"opensearch":    openSearchUrl,
-		"mbytes":        mBytesString,
-		"mediafileuses": a.db.usesOfMediaFile,
+		"dateformat": dateFormat,
+		"isodate":    isoDateFormat,
+		"unixtodate": unixToLocalDateString,
+		"now":        localNowString,
+		"asset":      a.assetFileName,
+		"string":     a.ts.GetTemplateStringVariantFunc(),
+		"include":    a.includeRenderedTemplate,
+		"urlize":     urlize,
+		"sort":       sortedStrings,
+		"absolute":   a.getFullAddress,
+		"mentions":   a.db.getWebmentionsByAddress,
+		"geotitle":   a.geoTitle,
+		"geolink":    geoOSMLink,
+		"opensearch": openSearchUrl,
+		"mbytes":     mBytesString,
 	}
 	baseTemplate, err := template.New("base").Funcs(templateFunctions).ParseFiles(path.Join(templatesDir, templateBase+templatesExt))
 	if err != nil {

templates/editorfiles.gohtml

@@ -9,8 +9,9 @@
     {{ if .Data.Files }}
       <form class="fw-form p" method="post">
         <select name="filename">
+          {{ $uses := .Data.Uses }}
           {{ range $i, $file := .Data.Files }}
-            <option value="{{ $file.Name }}">{{ $file.Name }} ({{ isodate $file.Time.String }}, {{ mbytes $file.Size }}, ~{{ mediafileuses $file.Name }} {{ string $blog.Lang "fileuses" }})</option>
+            <option value="{{ $file.Name }}">{{ $file.Name }} ({{ isodate $file.Time.String }}, {{ mbytes $file.Size }}, ~{{ index $uses $file.Name }} {{ string $blog.Lang "fileuses" }})</option>
           {{ end }}
         </select>
         <input type="submit" formaction="{{ .Blog.RelativePath "/editor/files/view" }}" value="{{ string .Blog.Lang "view" }}">