Add ability to select fs.readFile encoding (#267)

plugins/template-function-fs/src/index.ts

@@ -1,17 +1,39 @@
 import type { CallTemplateFunctionArgs, Context, PluginDefinition } from '@yaakapp/api';
 import fs from 'node:fs';
 
+const options = [
+  { label: 'ASCII', value: 'ascii' },
+  { label: 'UTF-8', value: 'utf8' },
+  { label: 'UTF-16 LE', value: 'utf16le' },
+  { label: 'Base64', value: 'base64' },
+  { label: 'Base64 URL-safe', value: 'base64url' },
+  { label: 'Latin-1', value: 'latin1' },
+  { label: 'Hexadecimal', value: 'hex' },
+];
 export const plugin: PluginDefinition = {
   templateFunctions: [
     {
       name: 'fs.readFile',
       description: 'Read the contents of a file as utf-8',
-      args: [{ title: 'Select File', type: 'file', name: 'path', label: 'File' }],
+      args: [
+        { title: 'Select File', type: 'file', name: 'path', label: 'File' },
+        {
+          title: 'Select encoding',
+          type: 'select',
+          name: 'encoding',
+          label: 'Encoding',
+          defaultValue: 'utf8',
+          description: 'Specifies how the file’s bytes are decoded into text when read',
+          options,
+        },
+      ],
       async onRender(_ctx: Context, args: CallTemplateFunctionArgs): Promise<string | null> {
-        if (!args.values.path) return null;
+        if (!args.values.path || !args.values.encoding) return null;
 
         try {
-          return fs.promises.readFile(String(args.values.path ?? ''), 'utf-8');
+          return fs.promises.readFile(String(args.values.path ?? ''), {
+            encoding: String(args.values.encoding ?? 'utf-8') as BufferEncoding,
+          });
         } catch {
           return null;
         }