fix: Secure S3 attachments, bump SDK, refactoring

Closes #673

server/api/models/Attachment.js

@@ -26,17 +26,6 @@ module.exports = {
       type: 'string',
       required: true,
     },
-    type: {
-      type: 'string',
-    },
-    url: {
-      type: 'string',
-      allowNull: true,
-    },
-    thumb: {
-      type: 'string',
-      allowNull: true,
-    },
 
     //  ╔═╗╔╦╗╔╗ ╔═╗╔╦╗╔═╗
     //  ║╣ ║║║╠╩╗║╣  ║║╚═╗
@@ -59,20 +48,12 @@ module.exports = {
   },
 
   customToJSON() {
-    let { url, thumb } = this;
-    if (!url) {
-      url = `${sails.config.custom.attachmentsUrl}/${this.id}/download/${this.filename}`;
-    }
-    if (!thumb) {
-      thumb = this.image
-        ? `${sails.config.custom.attachmentsUrl}/${this.id}/download/thumbnails/cover-256.${this.image.thumbnailsExtension}`
-        : null;
-    }
-
     return {
-      ..._.omit(this, ['type', 'dirname', 'filename', 'image.thumbnailsExtension']),
-      url,
-      coverUrl: thumb,
+      ..._.omit(this, ['dirname', 'filename', 'image.thumbnailsExtension']),
+      url: `${sails.config.custom.baseUrl}/attachments/${this.id}/download/${this.filename}`,
+      coverUrl: this.image
+        ? `${sails.config.custom.baseUrl}/attachments/${this.id}/download/thumbnails/cover-256.${this.image.thumbnailsExtension}`
+        : null,
     };
   },
 };