Add Mailgun email service

5 files changed, 113 insertions, 12 deletions

diff --git a/config/config.example.toml b/config/config.example.toml
index 32e2039..b3fed54 100644
--- a/config/config.example.toml
+++ b/config/config.example.toml
@@ -43,6 +43,16 @@ smtp_password = ""
 [sendgrid]
 api_key = ""
 
+[mailgun]
+# The base domain you have set up in Mailgun, for example 'mg.gath.io'.
+domain = ""
+# Your Mailgun sending API key for the domain you have set up.
+api_key = ""
+# This will be either https://api.mailgun.net (US) or https://api.eu.mailgun.net (EU)
+# depending on the region in your domain settings.
+api_url = "https://api.mailgun.net"
+
+
 # Links to static pages (for example a privacy policy) or an external community page,
 # which will be displayed in the footer.
 # If paths begin with a slash, they are treated as internal and will open the specified
diff --git a/package.json b/package.json
index 2de0373..6f60eb5 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
         "ical-generator": "^1.15.4",
         "jimp": "^0.16.13",
         "jsdom": "^22.1.0",
+        "mailgun.js": "^12.0.2",
         "marked": "^12.0.2",
         "moment-timezone": "^0.5.45",
         "mongoose": "^5.13.22",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 11f04d9..ad78dbb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -59,6 +59,9 @@ importers:
       jsdom:
         specifier: ^22.1.0
         version: 22.1.0
+      mailgun.js:
+        specifier: ^12.0.2
+        version: 12.0.2
       marked:
         specifier: ^12.0.2
         version: 12.0.2
@@ -585,9 +588,15 @@ packages:
   axios@1.7.2:
     resolution: {integrity: sha512-2A8QhOMrbomlDuiLeK9XibIBzuHeRcqqNOHp0Cyp5EoJ1IFDh+XZH3A6BkXtv0K4gFGCI0Y4BM7B1wOEi0Rmgw==}
 
+  axios@1.9.0:
+    resolution: {integrity: sha512-re4CqKTJaURpzbLHtIi6XpDv20/CnpXOtjRY5/CU32L8gU8ek9UIivcfvSWvmKEngmVbrUtPpdDwWDWL7DNHvg==}
+
   balanced-match@1.0.2:
     resolution: {integrity: sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==}
 
+  base-64@1.0.0:
+    resolution: {integrity: sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==}
+
   base64-js@1.5.1:
     resolution: {integrity: sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==}
 
@@ -1472,6 +1481,10 @@ packages:
   luxon@1.28.1:
     resolution: {integrity: sha512-gYHAa180mKrNIUJCbwpmD0aTu9kV0dREDrwNnuyFAsO1Wt0EVYSZelPnJlbj9HplzXX/YWXHFTL45kvZ53M0pw==}
 
+  mailgun.js@12.0.2:
+    resolution: {integrity: sha512-Ck7Vtmv7VarXntv6iGYsV3HB+yjV0nScETjuwBaCF4p6kxYRdcw72oWerPwaY7M2hVswTdTHOlY8EaOt6Ax0EA==}
+    engines: {node: '>=18.0.0'}
+
   marked@12.0.2:
     resolution: {integrity: sha512-qXUm7e/YKFoqFPYPa3Ukg9xlI5cyAtGmyEIzMfW//m6kXwCy2Ps9DYf5ioijFKQ8qyuscrHoY04iJGctu2Kg0Q==}
     engines: {node: '>= 18'}
@@ -2207,6 +2220,9 @@ packages:
   uri-js@4.4.1:
     resolution: {integrity: sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==}
 
+  url-join@4.0.1:
+    resolution: {integrity: sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA==}
+
   url-parse@1.5.10:
     resolution: {integrity: sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==}
 
@@ -2893,8 +2909,18 @@ snapshots:
     transitivePeerDependencies:
       - debug
 
+  axios@1.9.0:
+    dependencies:
+      follow-redirects: 1.15.6
+      form-data: 4.0.0
+      proxy-from-env: 1.1.0
+    transitivePeerDependencies:
+      - debug
+
   balanced-match@1.0.2: {}
 
+  base-64@1.0.0: {}
+
   base64-js@1.5.1: {}
 
   bcrypt-pbkdf@1.0.2:
@@ -3934,6 +3960,14 @@ snapshots:
   luxon@1.28.1:
     optional: true
 
+  mailgun.js@12.0.2:
+    dependencies:
+      axios: 1.9.0
+      base-64: 1.0.0
+      url-join: 4.0.1
+    transitivePeerDependencies:
+      - debug
+
   marked@12.0.2: {}
 
   media-typer@0.3.0: {}
@@ -4633,6 +4667,8 @@ snapshots:
     dependencies:
       punycode: 2.3.1
 
+  url-join@4.0.1: {}
+
   url-parse@1.5.10:
     dependencies:
       querystringify: 2.2.0
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 6642eef..3fd6eb7 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -21,7 +21,7 @@ export interface GathioConfig {
         email_logo_url: string;
         show_kofi: boolean;
         show_public_event_list: boolean;
-        mail_service: "nodemailer" | "sendgrid" | "none";
+        mail_service: "nodemailer" | "sendgrid" | "mailgun" | "none";
         creator_email_addresses: string[];
     };
     database: {
@@ -37,6 +37,11 @@ export interface GathioConfig {
     sendgrid?: {
         api_key: string;
     };
+    mailgun?: {
+        api_key: string;
+        api_url: string;
+        domain: string;
+    };
     static_pages?: StaticPage[];
 }
 
diff --git a/src/lib/email.ts b/src/lib/email.ts
index 7c7c2dd..fc585a1 100644
--- a/src/lib/email.ts
+++ b/src/lib/email.ts
@@ -5,6 +5,8 @@ import nodemailer, { Transporter } from "nodemailer";
 import { GathioConfig, getConfig } from "./config.js";
 import SMTPTransport from "nodemailer/lib/smtp-transport/index.js";
 import { exitWithError } from "./process.js";
+import Mailgun from "mailgun.js";
+import { IMailgunClient } from "node_modules/mailgun.js/Types/Interfaces/index.js";
 
 const config = getConfig();
 
@@ -24,7 +26,8 @@ type EmailTemplateName =
 export class EmailService {
     nodemailerTransporter: Transporter | undefined = undefined;
     sgMail: typeof sgMail | undefined = undefined;
-    hbs: ExpressHandlebars
+    mailgunClient: IMailgunClient | undefined = undefined;
+    hbs: ExpressHandlebars;
 
     public constructor(config: GathioConfig, hbs: ExpressHandlebars) {
         this.hbs = hbs;
@@ -40,6 +43,26 @@ export class EmailService {
                 console.log("Sendgrid is ready to send emails.");
                 break;
             }
+            case "mailgun": {
+                if (
+                    !config.mailgun?.api_key ||
+                    !config.mailgun?.api_url ||
+                    !config.mailgun?.domain
+                ) {
+                    return exitWithError(
+                        "Mailgun is configured as the email service, but not all required fields are provided. Please provide all required fields in the config file.",
+                    );
+                }
+                const mailgun = new Mailgun(FormData);
+                this.mailgunClient = mailgun.client({
+                    username: "api",
+                    key: config.mailgun.api_key,
+                    url: config.mailgun.api_url,
+                });
+                // TODO: Can we verify the Mailgun connection?
+                console.log("Mailgun is ready to send emails.");
+                break;
+            }
             case "nodemailer": {
                 if (config.nodemailer?.smtp_url) {
                     this.nodemailerTransporter = nodemailer.createTransport(
@@ -73,13 +96,13 @@ export class EmailService {
                         nodemailer.createTransport(nodemailerConfig);
                 }
             }
-
         }
     }
 
     public async verify(): Promise<boolean> {
         if (this.nodemailerTransporter) {
-            const nodemailerVerified = await this.nodemailerTransporter.verify();
+            const nodemailerVerified =
+                await this.nodemailerTransporter.verify();
             if (nodemailerVerified) {
                 console.log("Nodemailer is ready to send emails.");
                 return true;
@@ -118,9 +141,36 @@ export class EmailService {
                 return true;
             } catch (e: unknown | sgHelpers.classes.ResponseError) {
                 if (e instanceof sgHelpers.classes.ResponseError) {
-                    console.error('sendgrid error', e.response.body);
+                    console.error("sendgrid error", e.response.body);
+                } else {
+                    console.error("sendgrid error", e);
+                }
+                return false;
+            }
+        } else if (this.mailgunClient) {
+            try {
+                if (!config.mailgun?.domain) {
+                    return exitWithError(
+                        "Mailgun is configured as the email service, but no domain is provided. Please provide a domain in the config file.",
+                    );
+                }
+                await this.mailgunClient.messages.create(
+                    config.mailgun.domain,
+                    {
+                        from: config.general.email,
+                        to,
+                        bcc,
+                        subject: `${config.general.site_name}: ${subject}`,
+                        text,
+                        html,
+                    },
+                );
+                return true;
+            } catch (e: any) {
+                if (e.response) {
+                    console.error(e.response.body);
                 } else {
-                    console.error('sendgrid error', e);
+                    console.error(e);
                 }
                 return false;
             }
@@ -150,15 +200,14 @@ export class EmailService {
         bcc = "",
         subject,
         templateName,
-        templateData = {}
+        templateData = {},
     }: {
         to: string | string[];
         bcc?: string | string[] | undefined;
         subject: string;
         templateName: EmailTemplateName;
         templateData?: object;
-    },
-    ): Promise<boolean> {
+    }): Promise<boolean> {
         const [html, text] = await Promise.all([
             this.hbs.renderView(
                 `./views/emails/${templateName}/${templateName}Html.handlebars`,
@@ -172,7 +221,7 @@ export class EmailService {
                     cache: true,
                     layout: "email.handlebars",
                     ...templateData,
-                }
+                },
             ),
             this.hbs.renderView(
                 `./views/emails/${templateName}/${templateName}Text.handlebars`,
@@ -186,7 +235,7 @@ export class EmailService {
                     cache: true,
                     layout: "email.handlebars",
                     ...templateData,
-                }
+                },
             ),
         ]);
 
@@ -195,7 +244,7 @@ export class EmailService {
             bcc,
             subject: `${config.general.site_name}: ${subject}`,
             text,
-            html
+            html,
         });
     }
 }