Mail: Fetch and display date in e-mail list

Added a third column to show date of e-mail, as sent from the IMAP
server.

Userland/Applications/Mail/InboxModel.cpp

@@ -24,6 +24,8 @@ ErrorOr<String> InboxModel::column_name(int column_index) const
         return "From"_string;
     case Subject:
         return "Subject"_string;
+    case Date:
+        return "Date"_string;
     default:
         VERIFY_NOT_REACHED();
     }
@@ -37,6 +39,12 @@ GUI::Variant InboxModel::data(GUI::ModelIndex const& index, GUI::ModelRole role)
             return value.from;
         if (index.column() == Column::Subject)
             return value.subject;
+        if (index.column() == Column::Date)
+            return value.date;
+    }
+    if (role == GUI::ModelRole::TextAlignment) {
+        if (index.column() == Column::Date)
+            return Gfx::TextAlignment::CenterRight;
     }
     return {};
 }

Userland/Applications/Mail/InboxModel.h

@@ -13,6 +13,7 @@
 struct InboxEntry {
     DeprecatedString from;
     DeprecatedString subject;
+    DeprecatedString date;
 };
 
 class InboxModel final : public GUI::Model {
@@ -20,6 +21,7 @@ public:
     enum Column {
         From,
         Subject,
+        Date,
         __Count
     };
 

Userland/Applications/Mail/MailWidget.cpp

@@ -286,7 +286,7 @@ void MailWidget::selected_mailbox()
                 .type = IMAP::FetchCommand::DataItemType::PeekBody,
                 .section = IMAP::FetchCommand::DataItem::Section {
                     .type = IMAP::FetchCommand::DataItem::SectionType::HeaderFields,
-                    .headers = { { "Subject", "From" } },
+                    .headers = { { "Date", "Subject", "From" } },
                 },
             },
         },
@@ -321,6 +321,13 @@ void MailWidget::selected_mailbox()
             return header_iterator != data_item.section->headers->end();
         };
 
+        auto date_iterator = body_data.find_if([&data_item_has_header](Tuple<IMAP::FetchCommand::DataItem, Optional<DeprecatedString>>& data) {
+            auto const data_item = data.get<0>();
+            return data_item_has_header(data_item, "Date");
+        });
+
+        VERIFY(date_iterator != body_data.end());
+
         auto subject_iterator = body_data.find_if([&data_item_has_header](Tuple<IMAP::FetchCommand::DataItem, Optional<DeprecatedString>>& data) {
             auto const data_item = data.get<0>();
             return data_item_has_header(data_item, "Subject");
@@ -364,6 +371,19 @@ void MailWidget::selected_mailbox()
             return builder.to_deprecated_string();
         };
 
+        auto& date_iterator_value = date_iterator->get<1>().value();
+        auto date_index = date_iterator_value.find("Date:"sv);
+        DeprecatedString date;
+        if (date_index.has_value()) {
+            auto potential_date = date_iterator_value.substring(date_index.value());
+            auto date_parts = potential_date.split_limit(':', 2);
+            date = parse_and_unfold(date_parts.last());
+        }
+
+        if (date.is_empty()) {
+            date = "(Unknown date)";
+        }
+
         auto& subject_iterator_value = subject_iterator->get<1>().value();
         auto subject_index = subject_iterator_value.find("Subject:"sv);
         DeprecatedString subject;
@@ -374,7 +394,7 @@ void MailWidget::selected_mailbox()
         }
 
         if (subject.is_empty())
-            subject = "(no subject)";
+            subject = "(No subject)";
 
         auto& from_iterator_value = from_iterator->get<1>().value();
         auto from_index = from_iterator_value.find("From:"sv);
@@ -390,7 +410,7 @@ void MailWidget::selected_mailbox()
         if (from.is_empty())
             from = "(Unknown sender)";
 
-        InboxEntry inbox_entry { from, subject };
+        InboxEntry inbox_entry { from, subject, date };
         m_statusbar->set_text(String::formatted("[{}]: Loading entry {}", mailbox.name, ++i).release_value_but_fixme_should_propagate_errors());
 
         active_inbox_entries.append(inbox_entry);