Add support for values of Name, Hostname and Status

server/notification-providers/smtp.js

@@ -22,10 +22,40 @@ class SMTP extends NotificationProvider {
         }
         // Lets start with default subject
         let subject = msg;
+
         // Our subject cannot end with whitespace it's often raise spam score
         let customsubject = notification.customsubject.trim()
+
         // If custom subject is not empty, change subject for notification
         if (customsubject !== "") {
+            
+             // Replace "MACROS" with coresponding variable
+            let replaceName = new RegExp("{NAME}", "g");
+            let replaceHostname = new RegExp("{HOSTNAME}", "g");
+            let replaceStatus = new RegExp("{STATUS}", "g");
+
+            let serviceStatus;
+
+            if (monitorJSON !== null) {
+                customsubject = customsubject.replace(replaceName,monitorJSON["name"]);
+                customsubject = customsubject.replace(replaceHostname,monitorJSON["hostname"]);
+            } else {
+                // Insert dummy values during test
+                customsubject = customsubject.replace(replaceName,"Test");
+                customsubject = customsubject.replace(replaceHostname,"example.com");
+            }
+            if (heartbeatJSON !== null) {
+                    if (heartbeatJSON["status"] === 0) {
+                        serviceStatus = "🔴 Down"
+                    } else {
+                        serviceStatus = "✅ Up"
+                    }
+                customsubject = customsubject.replace(replaceStatus,serviceStatus);
+            } else {
+                // Insert dummy values during test
+                customsubject = customsubject.replace(replaceStatus,"TEST");
+            }
+
             subject = customsubject
         }
 

src/components/notifications/SMTP.vue

@@ -44,8 +44,8 @@
     </div>
 
     <div class="mb-3">
-        <label for="subject-email" class="form-label">{{ $t("Custom Email subject") }}</label>
-        <input id="subject-email" v-model="$parent.notification.customsubject" type="text" class="form-control" autocomplete="false" placeholder="[Uptime Kuma] Service status has changed">
+        <label for="subject-email" class="form-label">{{ $t("Email Subject") }}</label>
+        <input id="subject-email" v-model="$parent.notification.customsubject" type="text" class="form-control" autocomplete="false" placeholder="Service {NAME} on {HOSTNAME} has changed status to {STATUS}">
     </div>
 
     <div class="mb-3">

src/languages/en.js

@@ -201,7 +201,7 @@ export default {
     secureOptionTLS: "TLS (465)",
     "Ignore TLS Error": "Ignore TLS Error",
     "From Email": "From Email",
-    "Custom Email subject": "Custom Email Subject (leave blank for default one)",
+    "Email Subject": "Subject (leave blank for default one)",
     "To Email": "To Email",
     smtpCC: "CC",
     smtpBCC: "BCC",