Made Personalization more usable

Sources/SendGridProvider/Models/Personalization.swift

@@ -11,30 +11,37 @@ public struct Personalization {
     /*
         The email copy recipients
     */
-    public let cc: [EmailAddress] = []
+    public let cc: [EmailAddress]
     /*
         The email blind copy recipients
     */
-    public let bcc: [EmailAddress] = []
+    public let bcc: [EmailAddress]
     /*
         The email subject, overriding that of the Email, if set
     */
-    public let subject: String? = nil
+    public let subject: String?
     /*
         Custom headers
     */
-    public let headers: [String: String] = [:]
+    public var headers: [String: String] = [:]
     /*
         Custom substitutions in the format ["tag": "value"]
     */
-    public let substitutions: [String: String] = [:]
+    public var substitutions: [String: String] = [:]
     /*
         Date to send the email, or `nil` if email to be sent immediately
     */
-    public let sendAt: Date? = nil
+    public var sendAt: Date? = nil
 
-    public init(to: [EmailAddress]) {
+    public init(to: [EmailAddress], cc: [EmailAddress], bcc: [EmailAddress], subject: String?) {
         self.to = to
+        self.cc = cc
+        self.bcc = bcc
+        self.subject = subject
+    }
+
+    public init(to: [EmailAddress]) {
+        self.init(to: to, cc: [], bcc: [], subject: nil)
     }
 
 }

Sources/SendGridProvider/Models/SendGridEmail.swift

@@ -56,27 +56,27 @@ public final class SendGridEmail {
     /*
         Date to send the email, or `nil` if email to be sent immediately
     */
-    public let sendAt: Date? = nil
+    public var sendAt: Date? = nil
 
     /*
         Include this email in a named batch
     */
-    public let batchId: String? = nil
+    public var batchId: String? = nil
 
     /*
         Determines how to handle unsubscribe links
     */
-    public let unsubscribeHandling: UnsubscribeHandling = .default
+    public var unsubscribeHandling: UnsubscribeHandling = .default
 
     /*
         IP pool to send from
     */
-    public let ipPoolName: String? = nil
+    public var ipPoolName: String? = nil
 
     /*
         Bypass unsubscriptions and suppressions - use only in emergency
     */
-    public let bypassListManagement: Bool = false
+    public var bypassListManagement: Bool = false
 
     /*
         Footer to add to email in variety of content types
@@ -121,7 +121,7 @@ public final class SendGridEmail {
     /*
         Email body content. Can only be empty if `templateId` is set
     */
-    public var content: [EmailBody] = []
+    public let content: [EmailBody]
 
     private init(from: EmailAddressRepresentable, subject: String?, templateId: String?, body: EmailBodyRepresentable?) {
         personalizations = []
@@ -130,6 +130,8 @@ public final class SendGridEmail {
         self.templateId = templateId
         if let body = body {
             self.content = [body.emailBody]
+        } else {
+            self.content = []
         }
     }