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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2026 Danilo M. <danix@danix.xyz>
*/
#ifndef QTMAILDIR_THREADDIGEST_H
#define QTMAILDIR_THREADDIGEST_H
#include <QList>
#include <QMetaType>
#include <QPair>
#include <QString>
#include <QStringList>
#include <QVector>
#include "types.h"
/// What the thread dashboard shows, as a plain value.
///
/// Crosses the worker boundary like every other structure here: no
/// notmuch_* pointer, no widget, no model. Everything in it is read from the
/// INDEX, so building one opens no message files.
struct ThreadDigest
{
QString threadId;
/// Display name and message count, most prolific first.
QList<QPair<QString, int>> senders;
/// The unread messages, NEWEST FIRST, at most kUnreadShown of them.
///
/// MessageNode rather than MessageRef, because the dashboard DRAWS these
/// rows for messages it never opens, which is what MessageNode exists for;
/// MessageRef carries only what the pane needs once a message is already
/// open, and has no subject, sender or date. The no-file-opening contract
/// above still holds: all four of those are served from the index.
QVector<MessageNode> unread;
/// How many there really are. The list above is capped, so a count taken
/// from its size would under-report on exactly the threads that need the
/// number most.
int unreadTotal = 0;
int totalCount = 0;
/// Every message's file, RELATIVE to the database path, in the walk's own
/// order.
///
/// Item 178. Delete and Restore ask whether a row is in the trash, and a
/// CONVERSATION is in the trash only when all of its messages are.
/// ThreadSummary carries one path, which was the right answer while a
/// thread row meant its first message and is not one now, so a partly
/// trashed conversation answered on whichever message the query returned
/// first: Delete hidden on a thread with mail outside the trash, Restore
/// offered on one that mostly is not.
///
/// Relative and not absolute, for the same reason
/// ThreadSummary::firstMessagePath is: the UI knows an account only by its
/// `maildir`, itself a database-relative prefix, so an absolute path
/// matches no account and silently resolves every row to none.
///
/// Free, like everything else here: the digest already walks every message
/// for the sender counts, and a filename is served from the INDEX rather
/// than the message file. A message with several files contributes only
/// its first, which is what notmuch_message_get_filename returns; the
/// question is which FOLDER a message lives in, and a caller testing
/// "every path is under trash" is answered correctly by any one of them.
QStringList messagePaths;
/// Always kBuckets entries. A fixed count is what keeps the sparkline's
/// geometry testable; a thread spanning five days and one spanning two
/// years cannot share a bucket size, so the span is what varies and the
/// label beneath carries the truth.
QVector<int> buckets;
qint64 firstTimestamp = 0;
qint64 lastTimestamp = 0;
int busiestBucket = -1;
static constexpr int kBuckets = 7;
static constexpr int kUnreadShown = 5;
};
Q_DECLARE_METATYPE(ThreadDigest)
#endif // QTMAILDIR_THREADDIGEST_H
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