Added shared mailer package to remove circular dependencies between packages. (#63)

packages/mailers/resend/README.md

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+# Nodemailer - @kit/nodemailer
+
+This package provides a simple and easy to use mailer for sending emails using nodemailer.

packages/mailers/resend/package.json

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+{
+  "name": "@kit/resend",
+  "private": true,
+  "version": "0.1.0",
+  "scripts": {
+    "clean": "git clean -xdf .turbo node_modules",
+    "format": "prettier --check \"**/*.{ts,tsx}\"",
+    "lint": "eslint .",
+    "typecheck": "tsc --noEmit"
+  },
+  "prettier": "@kit/prettier-config",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "devDependencies": {
+    "@kit/eslint-config": "workspace:*",
+    "@kit/mailers-shared": "workspace:^",
+    "@kit/prettier-config": "workspace:*",
+    "@kit/tailwind-config": "workspace:*",
+    "@kit/tsconfig": "workspace:*",
+    "@types/node": "^22.5.2",
+    "zod": "^3.23.8"
+  },
+  "eslintConfig": {
+    "root": true,
+    "extends": [
+      "@kit/eslint-config/base",
+      "@kit/eslint-config/react"
+    ]
+  },
+  "typesVersions": {
+    "*": {
+      "*": [
+        "src/*"
+      ]
+    }
+  }
+}

packages/mailers/resend/src/index.ts

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+import 'server-only';
+
+import { z } from 'zod';
+
+import { Mailer, MailerSchema } from '@kit/mailers-shared';
+
+type Config = z.infer<typeof MailerSchema>;
+
+const RESEND_API_KEY = z
+  .string({
+    description: 'The API key for the Resend API',
+    required_error: 'Please provide the API key for the Resend API',
+  })
+  .parse(process.env.RESEND_API_KEY);
+
+export function createResendMailer() {
+  return new ResendMailer();
+}
+
+/**
+ * A class representing a mailer using the Resend HTTP API.
+ * @implements {Mailer}
+ */
+class ResendMailer implements Mailer {
+  async sendEmail(config: Config) {
+    const contentObject =
+      'text' in config
+        ? {
+            text: config.text,
+          }
+        : {
+            html: config.html,
+          };
+
+    const res = await fetch('https://api.resend.com/emails', {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        Authorization: `Bearer ${RESEND_API_KEY}`,
+      },
+      body: JSON.stringify({
+        from: config.from,
+        to: [config.to],
+        subject: config.subject,
+        ...contentObject,
+      }),
+    });
+
+    if (!res.ok) {
+      throw new Error(`Failed to send email: ${res.statusText}`);
+    }
+  }
+}

packages/mailers/resend/tsconfig.json

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+{
+  "extends": "@kit/tsconfig/base.json",
+  "compilerOptions": {
+    "tsBuildInfoFile": "node_modules/.cache/tsbuildinfo.json"
+  },
+  "include": ["*.ts", "src"],
+  "exclude": ["node_modules"]
+}