Feature/add fallback option (#212)

* feat(filelink): Add fallback task

Author: AndrzejSala

rollup.config.js

@@ -6,7 +6,6 @@ const nodeResolve = require('rollup-plugin-node-resolve');
 const replace = require('rollup-plugin-replace');
 const json = require('rollup-plugin-json');
 const babel = require('rollup-plugin-babel');
-const inject = require('rollup-plugin-inject');
 
 const adapters = {
   './lib/api/security': 'build/module/adapters/security.browser.js',

src/lib/filelink.ts

@@ -420,6 +420,11 @@ export interface PdfConvertParams {
   pages?: (string | number)[];
 }
 
+export interface FallbackParams {
+  handle: string;
+  cache: number;
+}
+
 const handleRegexp = /^[\w\-]{20}$/;
 
 /**
@@ -1168,6 +1173,18 @@ export class Filelink {
     return this.addTask('pdfconvert', params);
   }
 
+  /**
+   * Adds fallback transformation
+   *
+   * @see https://www.filestack.com/docs/api/processing/#fallback
+   * @param {(FallbackParams)} params
+   * @returns this
+   * @memberof Filelink
+   */
+  fallback(params: FallbackParams) {
+    return this.addTask('fallback', params);
+  }
+
   /**
    * Checks if source is external
    *

src/schema/transforms.schema.ts

@@ -1335,5 +1335,20 @@ export const TransformSchema = {
         required: ['pages'],
       }],
     },
+    fallback: {
+      type: 'object',
+      additionalProperties: false,
+      properties: {
+        handle: {
+          type: 'string',
+        },
+        cache: {
+          type: 'integer',
+          minimum: 1,
+          maximum: 31536000,
+        },
+      },
+      required: ['handle'],
+    },
   },
 };