Display count of file uses

database.go

@@ -70,7 +70,7 @@ func (a *goBlog) openDatabase(file string, logging bool) (*database, error) {
 			return nil
 		},
 	}
-	if a.cfg.Db.Debug {
+	if c := a.cfg.Db; c != nil && c.Debug {
 		dr = sqlhooks.Wrap(dr, &dbHooks{})
 	}
 	sql.Register("goblog_db_"+dbDriverName, dr)

database_test.go

@@ -10,7 +10,9 @@ func (a *goBlog) setInMemoryDatabase() {
 
 func Test_database(t *testing.T) {
 	t.Run("Basic Database Test", func(t *testing.T) {
-		app := &goBlog{}
+		app := &goBlog{
+			cfg: &config{},
+		}
 
 		db, err := app.openDatabase(":memory:", false)
 		if err != nil {

postsDb.go

@@ -428,3 +428,16 @@ 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 where instr(content, @name) > 0 union all select path from post_parameters where instr(value, @name) > 0)"
+	row, err := db.queryRow(query, sql.Named("name", name))
+	if err != nil {
+		return 0, err
+	}
+	err = row.Scan(&count)
+	if err != nil {
+		return 0, err
+	}
+	return count, nil
+}

postsDb_test.go

@@ -155,7 +155,9 @@ func Test_postsDb(t *testing.T) {
 func Test_ftsWithoutTitle(t *testing.T) {
 	// Added because there was a bug where there were no search results without title
 
-	app := &goBlog{}
+	app := &goBlog{
+		cfg: &config{},
+	}
 	app.setInMemoryDatabase()
 
 	err := app.db.savePost(&post{
@@ -175,3 +177,49 @@ func Test_ftsWithoutTitle(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Len(t, ps, 1)
 }
+
+func Test_usesOfMediaFile(t *testing.T) {
+	app := &goBlog{
+		cfg: &config{},
+	}
+	app.setInMemoryDatabase()
+
+	err := app.db.savePost(&post{
+		Path:      "/test/abc",
+		Content:   "ABC test.jpg DEF",
+		Published: toLocalSafe(time.Now().String()),
+		Blog:      "en",
+		Section:   "test",
+		Status:    statusDraft,
+	}, &postCreationOptions{new: true})
+	require.NoError(t, err)
+
+	err = app.db.savePost(&post{
+		Path:      "/test/def",
+		Content:   "ABCDEF",
+		Published: toLocalSafe(time.Now().String()),
+		Blog:      "en",
+		Section:   "test",
+		Status:    statusDraft,
+		Parameters: map[string][]string{
+			"test": {
+				"https://example.com/test.jpg",
+			},
+		},
+	}, &postCreationOptions{new: true})
+	require.NoError(t, err)
+
+	err = app.db.savePost(&post{
+		Path:      "/test/hij",
+		Content:   "ABCDEF",
+		Published: toLocalSafe(time.Now().String()),
+		Blog:      "en",
+		Section:   "test",
+		Status:    statusDraft,
+	}, &postCreationOptions{new: true})
+	require.NoError(t, err)
+
+	count, err := app.db.usesOfMediaFile("test.jpg")
+	require.NoError(t, err)
+	assert.Equal(t, 2, count)
+}

render.go

@@ -55,21 +55,22 @@ 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,
+		"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,
 	}
 	baseTemplate, err := template.New("base").Funcs(templateFunctions).ParseFiles(path.Join(templatesDir, templateBase+templatesExt))
 	if err != nil {

templates/editorfiles.gohtml

@@ -10,7 +10,7 @@
       <form class="fw-form p" method="post">
         <select name="filename">
           {{ range $i, $file := .Data.Files }}
-            <option value="{{ $file.Name }}">{{ $file.Name }} ({{ isodate $file.Time.String }}, {{ mbytes $file.Size }})</option>
+            <option value="{{ $file.Name }}">{{ $file.Name }} ({{ isodate $file.Time.String }}, {{ mbytes $file.Size }}, ~{{ mediafileuses $file.Name }} {{ string $blog.Lang "fileuses" }})</option>
           {{ end }}
         </select>
         <input type="submit" formaction="{{ .Blog.RelativePath "/editor/files/view" }}" value="{{ string .Blog.Lang "view" }}">

templates/strings/de.yaml

@@ -11,6 +11,7 @@ docomment: "Kommentieren"
 download: "Herunterladen"
 drafts: "Entwürfe"
 editor: "Editor"
+fileuses: "Datei-Verwendungen"
 interactions: "Interaktionen & Kommentare"
 interactionslabel: "Hast du eine Antwort hierzu veröffentlicht? Füge hier die URL ein."
 likeof: "Gefällt mir von"

templates/strings/default.yaml

@@ -17,6 +17,7 @@ download: "Download"
 drafts: "Drafts"
 editor: "Editor"
 feed: "Feed"
+fileuses: "file uses"
 indieauth: "IndieAuth"
 interactions: "Interactions & Comments"
 interactionslabel: "Have you published a response to this? Paste the URL here."