Add email recipient schema to email message structure

- Introduced a new `emailRecipientSchema` to encapsulate recipient details, including email, type, and associated objects.
- Updated the `emailMessageSchema` to utilize the new `recipients` field, enhancing the management of multiple recipients.
- Modified indexing to support text search on recipient emails and ensure unique pixel IDs for recipients.
- Improved overall schema structure for better clarity and maintainability.

src/database/schemas/management/emailmessage.schema.js

@@ -3,6 +3,32 @@ import { generateId } from '../../utils.js';
 
 const { Schema } = mongoose;
 
+const emailRecipientSchema = new Schema(
+  {
+    recipientEmail: { type: String, required: true },
+    recipientType: { type: String, enum: ['client', 'vendor'], required: false },
+    recipient: {
+      type: Schema.Types.ObjectId,
+      refPath: 'recipients.recipientType',
+      required: false,
+    },
+    objectType: { type: String, required: false },
+    object: {
+      type: Schema.Types.ObjectId,
+      refPath: 'recipients.objectType',
+      required: false,
+    },
+    pixelId: { type: String, required: true },
+    messageId: { type: String, required: false },
+    attachments: [{ type: Schema.Types.ObjectId, ref: 'file', required: false }],
+    read: { type: Boolean, required: true, default: false },
+    sent: { type: Boolean, required: true, default: false },
+    sentAt: { type: Date, required: false },
+    readAt: { type: Date, required: false },
+  },
+  { _id: true }
+);
+
 const emailMessageSchema = new Schema(
   {
     _reference: { type: String, default: () => generateId()() },
@@ -20,36 +46,29 @@ const emailMessageSchema = new Schema(
       ref: 'emailAccount',
       required: true,
     },
-    recipientEmail: { type: String, required: true },
-    recipientType: { type: String, enum: ['client', 'vendor'], required: false },
-    recipient: {
-      type: Schema.Types.ObjectId,
-      refPath: 'recipientType',
-      required: false,
-    },
+    recipients: { type: [emailRecipientSchema], required: true, default: [] },
     fromEmail: { type: String, required: true, immutable: true },
-    messageId: { type: String, required: false },
     subject: { type: String, required: false, default: '' },
     content: { type: String, required: false, default: '' },
-    attachments: [{ type: Schema.Types.ObjectId, ref: 'file', required: false }],
     state: {
       type: { type: String, required: true, default: 'queued' },
       progress: { type: Number, required: false, default: 0 },
       message: { type: String, required: false },
     },
-    read: { type: Boolean, required: true, default: false },
     sentAt: { type: Date, required: false },
-    readAt: { type: Date, required: false },
+    firstReadAt: { type: Date, required: false },
+    lastReadAt: { type: Date, required: false },
   },
   { timestamps: true, suppressReservedKeysWarning: true }
 );
 
 emailMessageSchema.index({
   name: 'text',
-  recipientEmail: 'text',
   fromEmail: 'text',
   objectType: 'text',
+  'recipients.recipientEmail': 'text',
 });
+emailMessageSchema.index({ 'recipients.pixelId': 1 }, { unique: true, sparse: true });
 emailMessageSchema.virtual('id').get(function () {
   return this._id;
 });