New data model authors routes

server/finders/AuthorFinder.js

@@ -31,6 +31,27 @@ class AuthorFinder {
     return author
   }
 
+  async saveAuthorImage(authorId, url) {
+    var authorDir = this.AuthorPath
+    var relAuthorDir = Path.posix.join('/metadata', 'authors')
+    await fs.ensureDir(authorDir)
+
+    var imageExtension = url.toLowerCase().split('.').pop()
+    var ext = imageExtension === 'png' ? 'png' : 'jpg'
+    var filename = authorId + '.' + ext
+    var outputPath = Path.posix.join(authorDir, filename)
+    var relPath = Path.posix.join(relAuthorDir, filename)
+
+    var success = await this.downloadImage(url, outputPath)
+    if (!success) {
+      return null
+    }
+    return {
+      path: outputPath,
+      relPath
+    }
+  }
+
   async createAuthor(payload) {
     if (!payload || !payload.name) return null