Add new file_input block kit element. (#1689)

packages/types/src/block-kit/block-elements.ts

@@ -121,6 +121,29 @@ export interface EmailInput extends Actionable, Dispatchable, Focusable, Placeho
   initial_value?: string;
 }
 
+/**
+ * @description Allows user to upload files. In order to use the `file_input` element within your app,
+ * your app must have the `files:read` scope.
+ * @see {@link https://api.slack.com/reference/block-kit/block-elements#file_input File input element reference}.
+ */
+export interface FileInput extends Actionable {
+  /**
+   * @description The type of element. In this case `type` is always `file_input`.
+   */
+  type: 'file_input';
+  /**
+   * @description An array of valid {@link https://api.slack.com/types/file#types file extensions} that will be accepted
+   * for this element. All file extensions will be accepted if `filetypes` is not specified. This validation is provided
+   * for convenience only, and you should perform your own file type validation based on what you expect to receive.
+   */
+  filetypes?: string[];
+  /**
+   * @description Maximum number of files that can be uploaded for this `file_input` element. Minimum of `1`, maximum of
+   * `10`. Defaults to `10` if not specified.
+   */
+  max_files?: number;
+}
+
 /**
  * @description Displays an image as part of a larger block of content. Use this `image` block if you want a block with
  * only an image in it.

packages/types/src/block-kit/blocks.ts

@@ -2,7 +2,7 @@
 
 import { PlainTextElement, MrkdwnElement } from './composition-objects';
 import { Actionable } from './extensions';
-import { Button, Checkboxes, Datepicker, DateTimepicker, EmailInput, ImageElement, MultiSelect, NumberInput, Overflow, PlainTextInput, RadioButtons, Select, Timepicker, URLInput, WorkflowButton, RichTextSection, RichTextList, RichTextQuote, RichTextPreformatted, RichTextInput } from './block-elements';
+import { Button, Checkboxes, Datepicker, DateTimepicker, EmailInput, FileInput, ImageElement, MultiSelect, NumberInput, Overflow, PlainTextInput, RadioButtons, Select, Timepicker, URLInput, WorkflowButton, RichTextSection, RichTextList, RichTextQuote, RichTextPreformatted, RichTextInput } from './block-elements';
 
 export interface Block {
   type: string;
@@ -159,7 +159,7 @@ export interface InputBlock extends Block {
    * @description A block element.
    */
   element: Select | MultiSelect | Datepicker | Timepicker | DateTimepicker | PlainTextInput | URLInput | EmailInput
-  | NumberInput | RadioButtons | Checkboxes | RichTextInput;
+  | NumberInput | RadioButtons | Checkboxes | RichTextInput | FileInput;
   /**
    * @description A boolean that indicates whether or not the use of elements in this block should dispatch a
    * {@link https://api.slack.com/reference/interaction-payloads/block-actions block_actions payload}. Defaults to `false`.