feat(cli): add mail preview command

cli.ts

@@ -1,11 +1,13 @@
 import config from './deno.json' with { type: 'json' }
 import { Command } from '@cliffy/command/command.ts'
 import { cmd as send } from './cli/send.ts'
+import { cmd as preview } from './cli/preview.ts'
 
 const cli = new Command()
 	.name('cohamail')
 	.description('Mail cli for coh@bit.')
 	.version(config.version)
+	.command('preview', preview)
 	.command('send', send)
 
 if (import.meta.main) {

cli/preview.ts

@@ -0,0 +1,46 @@
+import { Command } from '@cliffy/command/mod.ts'
+import { renderTemplate } from '../src/template.tsx'
+import { templates, templateType } from './_templates_loader.ts'
+import { promptProps } from './_prompt_template.ts'
+
+export const cmd = new Command()
+	.name('preview')
+	.description('Preview a mail.')
+	.type('template', templateType)
+	.option(
+		'-p, --port <number:number>',
+		'Port to serve preview, default random free port.',
+	)
+	.option('-t, --template <name:template>', 'HTML template from config', {
+		default: 'message',
+	})
+	.action(
+		async ({ template, port }) => {
+			const selectedTemplate = templates.get(template)!
+			const props = await promptProps(selectedTemplate)
+
+			const body = selectedTemplate.builder(props)!
+			const { html, text } = await renderTemplate(body)
+
+			Deno.serve({ port }, (req) => {
+				const url = new URL(req.url)
+				if (url.pathname === '/') {
+					return new Response(html, {
+						headers: {
+							'Content-Type': 'text/html; charset=utf-8',
+						},
+					})
+				}
+				if (url.pathname === '/text') {
+					return new Response(text, {
+						headers: {
+							'Content-Type': 'text/plain; charset=utf-8',
+						},
+					})
+				}
+				return new Response('Not found', {
+					status: 404,
+				})
+			})
+		},
+	)

deno.json

@@ -18,6 +18,7 @@
 	},
 	"imports": {
 		"@cliffy/": "https://deno.land/x/cliffy@v1.0.0-rc.3/",
+		"@std/path": "jsr:@std/path@^0.221.0",
 		"jsx-email": "npm:jsx-email@^1.10.12",
 		"nodemailer": "npm:nodemailer@^6.9.13",
 		"nodemailer-smime": "npm:nodemailer-smime@^1.1.0",

deno.lock

@@ -2,6 +2,8 @@
   "version": "3",
   "packages": {
     "specifiers": {
+      "jsr:@std/assert@^0.221.0": "jsr:@std/assert@0.221.0",
+      "jsr:@std/path@^0.221.0": "jsr:@std/path@0.221.0",
       "npm:@types/nodemailer": "npm:@types/nodemailer@6.4.14",
       "npm:html-to-md": "npm:html-to-md@0.8.5",
       "npm:jsx-email@^1.10.12": "npm:jsx-email@1.10.12_@jsx-email+app-preview@1.2.5__react@18.2.0__react-dom@18.2.0___react@18.2.0__vite@4.5.3_react@18.2.0_vite@4.5.3_postcss@8.4.38",
@@ -14,6 +16,17 @@
       "npm:turndown": "npm:turndown@7.1.3",
       "npm:turndown@^7.1.3": "npm:turndown@7.1.3"
     },
+    "jsr": {
+      "@std/assert@0.221.0": {
+        "integrity": "a5f1aa6e7909dbea271754fd4ab3f4e687aeff4873b4cef9a320af813adb489a"
+      },
+      "@std/path@0.221.0": {
+        "integrity": "0a36f6b17314ef653a3a1649740cc8db51b25a133ecfe838f20b79a56ebe0095",
+        "dependencies": [
+          "jsr:@std/assert@^0.221.0"
+        ]
+      }
+    },
     "npm": {
       "@alloc/quick-lru@5.2.0": {
         "integrity": "sha512-UrcABB+4bUrFABwbluTIBErXwvbsU/V7TZWfmbgJfbkwiBuziS9gxdODUyuiecfdGQ85jglMW6juS3+z5TsKLw==",
@@ -3966,6 +3979,7 @@
   },
   "workspace": {
     "dependencies": [
+      "jsr:@std/path@^0.221.0",
       "npm:jsx-email@^1.10.12",
       "npm:nodemailer-smime@^1.1.0",
       "npm:nodemailer@^6.9.13",