Adds fallback text to responses.

lib/response-types.js

@@ -43,6 +43,7 @@ class TextResponse {
     let parts = response.body.split('\n');
     const attachmentTitle = parts.shift();
     return {
+      fallback: `${attachmentTitle} - ${parts.join(' ')}`,
       text: parts.join('\n'),
       title: attachmentTitle,
       title_link: response.headers['x-scryfall-card'],
@@ -76,6 +77,7 @@ class ImageResponse extends TextResponse {
   makeAttachment(response) {
     let parts = response.body.split('\n');
     return {
+      fallback: `Image: ${response.headers['x-scryfall-card-image']}`,
       image_url: response.headers['x-scryfall-card-image'],
       title: parts[0].match(/^([^{]+)/)[0].trim(),
       title_link: response.headers['x-scryfall-card'],
@@ -92,6 +94,7 @@ class PriceResponse extends TextResponse {
     let parts = response.body.split('\n');
     const u = 'https://www.google.com';
     return {
+      fallback: `Prices for: ${this.cardName}`,
       fields: [
         { title: `Kaladesh`, value: `<${u}|$0.16>`, short: true },
         { title: `Magic Origins`, value: `<${u}|$0.24>, <${u}|0.01 tix>`, short: true }