TF-105 [BUG] Fix loading is blinking when reading email

model/lib/extensions/email_body_part_extension.dart

@@ -9,5 +9,5 @@ extension EmailBodyPartExtension on EmailBodyPart {
     name: name,
     type: type,
     cid: cid,
-    disposition: disposition);
+    disposition: disposition.toContentDisposition());
 }

model/lib/extensions/email_extension.dart

@@ -1,6 +1,8 @@
 
+import 'package:http_parser/http_parser.dart';
 import 'package:jmap_dart_client/jmap/core/properties/properties.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email_body_part.dart';
 import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
 import 'package:model/email/email_property.dart';
 import 'package:model/model.dart';
@@ -22,15 +24,6 @@ extension EmailExtension on Email {
     return listEmailAddress;
   }
 
-  EmailContent toEmailContent() {
-    return EmailContent(
-      id,
-      htmlBody: htmlBody,
-      attachments: attachments,
-      bodyValues: bodyValues
-    );
-  }
-
   Email updatedEmail({Map<KeyWordIdentifier, bool>? newKeywords}) {
     return Email(
         id,
@@ -86,4 +79,32 @@ extension EmailExtension on Email {
       mailboxIds: updatedProperties.contain(EmailProperty.mailboxIds) ? newEmail.mailboxIds : mailboxIds,
     );
   }
+
+  List<EmailContent> get emailContentList {
+    final newHtmlBody = htmlBody
+      ?.where((emailBody) => emailBody.partId != null && emailBody.type != null)
+      .toList() ?? <EmailBodyPart>[];
+
+    final mapHtmlBody = Map<PartId, MediaType>.fromIterable(
+      newHtmlBody,
+      key: (emailBody) => emailBody.partId!,
+      value: (emailBody) => emailBody.type!,
+    );
+
+    final emailContents = bodyValues?.entries
+      .map((entries) => EmailContent(mapHtmlBody[entries.key].toEmailContentType(), entries.value.value))
+      .toList();
+
+    return emailContents ?? [];
+  }
+
+  List<Attachment> get allAttachments {
+    if (attachments != null) {
+      return attachments!
+        .where((element) => element.disposition != null)
+        .map((item) => item.toAttachment())
+        .toList();
+    }
+    return [];
+  }
 }

model/lib/extensions/media_type_extension.dart

@@ -0,0 +1,20 @@
+import 'package:http_parser/http_parser.dart';
+import 'package:model/email/email_content_type.dart';
+
+extension MediaTypeExtension on MediaType? {
+
+  EmailContentType toEmailContentType() {
+    if (this == null) {
+      return EmailContentType.textHtml;
+    } else {
+      switch(this!.mimeType) {
+        case 'text/html':
+          return EmailContentType.textHtml;
+        case 'text/plain':
+          return EmailContentType.textPlain;
+        default:
+          return EmailContentType.other;
+      }
+    }
+  }
+}