1 files changed, 46 insertions, 31 deletions

diff --git a/ext/js/language/dictionary-importer.js b/ext/js/language/dictionary-importer.js
index 888d19b0..e060b3b1 100644
--- a/ext/js/language/dictionary-importer.js
+++ b/ext/js/language/dictionary-importer.js
@@ -306,64 +306,79 @@ class DictionaryImporter {
     }
 
     async _formatDictionaryTermGlossaryImage(data, context, entry) {
-        const dictionary = entry.dictionary;
         const {path, width: preferredWidth, height: preferredHeight, title, description, pixelated} = data;
-        if (context.media.has(path)) {
-            // Already exists
-            return data;
-        }
+        const {width, height} = await this._getImageMedia(path, context, entry);
+
+        // Create new data
+        const newData = {
+            type: 'image',
+            path,
+            width,
+            height
+        };
+        if (typeof preferredWidth === 'number') { newData.preferredWidth = preferredWidth; }
+        if (typeof preferredHeight === 'number') { newData.preferredHeight = preferredHeight; }
+        if (typeof title === 'string') { newData.title = title; }
+        if (typeof description === 'string') { newData.description = description; }
+        if (typeof pixelated === 'boolean') { newData.pixelated = pixelated; }
+
+        return newData;
+    }
+
+    async _getImageMedia(path, context, entry) {
+        const {media} = context;
+        const {dictionary, reading} = entry;
 
         let errorSource = entry.expression;
-        if (entry.reading.length > 0) {
-            errorSource += ` (${entry.reading});`;
+        if (reading.length > 0) {
+            errorSource += ` (${reading})`;
+        }
+        errorSource += dictionary;
+
+        const createError = (message) => new Error(`${message} at path ${JSON.stringify(path)} for ${errorSource}`);
+
+        // Check if already added
+        let mediaData = media.get(path);
+        if (typeof mediaData !== 'undefined') {
+            if (MediaUtil.getFileExtensionFromImageMediaType(mediaData.mediaType) === null) {
+                throw createError('Media file is not a valid image');
+            }
+            return mediaData;
         }
 
+        // Find file in archive
         const file = context.archive.file(path);
         if (file === null) {
-            throw new Error(`Could not find image at path ${JSON.stringify(path)} for ${errorSource}`);
+            throw createError('Could not find image');
         }
 
+        // Load file content
         const content = await file.async('base64');
         const mediaType = MediaUtil.getImageMediaTypeFromFileName(path);
         if (mediaType === null) {
-            throw new Error(`Could not determine media type for image at path ${JSON.stringify(path)} for ${errorSource}`);
+            throw createError('Could not determine media type for image');
         }
 
+        // Load image data
         let image;
         try {
             image = await this._loadImageBase64(mediaType, content);
         } catch (e) {
-            throw new Error(`Could not load image at path ${JSON.stringify(path)} for ${errorSource}`);
+            throw createError('Could not load image');
         }
 
-        const width = image.naturalWidth;
-        const height = image.naturalHeight;
-
         // Create image data
-        const mediaData = {
+        mediaData = {
             dictionary,
             path,
             mediaType,
-            width,
-            height,
+            width: image.naturalWidth,
+            height: image.naturalHeight,
             content
         };
-        context.media.set(path, mediaData);
+        media.set(path, mediaData);
 
-        // Create new data
-        const newData = {
-            type: 'image',
-            path,
-            width,
-            height
-        };
-        if (typeof preferredWidth === 'number') { newData.preferredWidth = preferredWidth; }
-        if (typeof preferredHeight === 'number') { newData.preferredHeight = preferredHeight; }
-        if (typeof title === 'string') { newData.title = title; }
-        if (typeof description === 'string') { newData.description = description; }
-        if (typeof pixelated === 'boolean') { newData.pixelated = pixelated; }
-
-        return newData;
+        return mediaData;
     }
 
     async _fetchJsonAsset(url) {