Remove stale warning: thanks to Asaf we don't crash if config.toml is missing

config.toml

@@ -1,18 +0,0 @@
-# User Constants - Update as needed
-batch_size  = 500 # Max 500 messages per batch: https://postmarkapp.com/developer/api/templates-api#send-batch-with-templates
-test_email  = "" # Fill this in with your own email address
-
-# Handmade Cities Credentials - DON'T TOUCH
-[hmc]
-api_url       = "https://api.handmadecities.com/v1/meetups/subscribers"
-shared_secret = "Land_OF_TERminA__MAJORAS_LAIR#666!"
-city          = "Termina"
-
-# Postmark App Credentials - NO TOUCHY TOUCHY
-[postmark]
-server_token   = "37967b9a-6b1c-430e-a65f-de043de3e568"
-api_url        = "https://api.postmarkapp.com/email/batchWithTemplates"
-template_id    = 35682307
-sender_name    = "Skull Kid"
-sender_email   = "majora@handmadecities.com"
-message_stream = "termina"

main.go

@@ -7,14 +7,14 @@
 // ============================    Contributors    =========================
 // Bug & warning fixes
 //  Jacob Bell (@MysteriousJ)
-//  Asaf Gartner
+//  Asaf Gartner (@AsafGartner)
+//  Joshua Barnett (@jshbrntt)
+//  Jack Punter (@TarriestPython)
 //
 // Emotional Support
 //  Cucui Ganon Rosario
 // =========================================================================
 
-// WARNING: This program requires a companion config.toml file provided by Abner. Without it we will crash!
-
 package main
 
 import (
@@ -113,15 +113,21 @@ func retrieveSubscribers(cfg *Config) ([]string, error) {
 		return nil, errors.New("response format error: 'emails' field not found")
 	}
 
-	/* Convert emails to []string */
+    /* De-duplicate emails using a map */
 	/* *** */
-	var subscribers []string
+	emailMap := make(map[string]bool)
 	for _, email := range emails {
 		if emailStr, ok := email.(string); ok {
-			subscribers = append(subscribers, emailStr)
+			emailMap[emailStr] = true
 		}
 	}
 
+	/* Convert the map keys back to a slice */
+	var subscribers []string
+	for email := range emailMap {
+		subscribers = append(subscribers, email)
+	}
+
 	return subscribers, nil
 }
 
@@ -276,6 +282,13 @@ func blastMail(cfg *Config, logFile string, trackingFile string, audience []stri
 		}
 	}
 
+    existingReaderCount := len(sentToAddresses)
+    newReaderCount := 0
+
+    if existingReaderCount > 0 {
+        fmt.Println("Same email file specified: Sending only to new subscribers...")
+    }
+
 	var group []string
 	for _, a := range audience {
 		if a == "" {
@@ -301,6 +314,7 @@ func blastMail(cfg *Config, logFile string, trackingFile string, audience []stri
 				for i, res := range results {
 					log.WriteString(fmt.Sprintf("%s: %s\n", group[i], res.Message))
 				}
+                newReaderCount += len(group)
 				group = group[0:0]
 			}
 		}
@@ -316,7 +330,17 @@ func blastMail(cfg *Config, logFile string, trackingFile string, audience []stri
 		for i, res := range results {
 			log.WriteString(fmt.Sprintf("%s: %s\n", group[i], res.Message))
 		}
+        newReaderCount += len(group)
 	}
+
+    if newReaderCount > 0 {
+        newSubscribers := existingReaderCount > 0
+        if newSubscribers {
+            fmt.Printf("Sent to %d new subscribers!\n", newReaderCount)
+        }
+    } else {
+        fmt.Printf("Not sent (no new subscribers)\n")
+    }
 }
 
 var postmarkClient = http.Client{}