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LCOV - code coverage report
Current view: top level - controller - ThreadBuilder.h (source / functions) Coverage Total Hit
Test: MailJD Coverage (Unit + E2E) Lines: 96.6 % 29 28
Test Date: 2026-07-27 17:53:44 Functions: 100.0 % 5 5
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
Branches: 80.6 % 36 29

             Branch data     Line data    Source code
       1                 :             : #pragma once
       2                 :             : 
       3                 :             : #include <QList>
       4                 :             : #include <QString>
       5                 :             : #include <memory>
       6                 :             : #include <vector>
       7                 :             : 
       8                 :             : #include "data/Models.h"
       9                 :             : 
      10                 :             : // A node in the mail thread tree.
      11                 :             : // Children are owned via unique_ptr; root nodes are owned by the caller.
      12                 :             : // T-79.B1/H7: the node owns its MailHeader by value. A pointer into the
      13                 :             : // source QList shared its (implicitly shared) buffer with MailListModel —
      14                 :             : // the first detach made the tree paint stale data and a later reallocation
      15                 :             : // turned every node pointer into a use-after-free.
      16                 :             : struct ThreadNode {
      17                 :             :   MailHeader header;
      18                 :             :   ThreadNode *parent = nullptr;
      19                 :             :   std::vector<std::unique_ptr<ThreadNode>> children;
      20                 :             :   int depth = 0;
      21                 :             : 
      22                 :         241 :   ~ThreadNode() = default;
      23                 :             : 
      24                 :             :   // Newest date in this subtree (for sorting root nodes).
      25                 :         381 :   QDateTime newestDate() const {
      26                 :         381 :     QDateTime newest = header.date;
      27         [ +  + ]:         405 :     for (const auto &child : children) {
      28         [ +  - ]:          24 :       QDateTime childDate = child->newestDate();
      29   [ +  -  +  +  :          24 :       if (childDate.isValid() && (!newest.isValid() || childDate > newest))
          +  -  +  +  +  
             -  +  +  +  
                      + ]
      30                 :          22 :         newest = childDate;
      31                 :          24 :     }
      32                 :         381 :     return newest;
      33                 :           0 :   }
      34                 :             : 
      35                 :             :   // Total count of descendants (not including self).
      36                 :          99 :   int descendantCount() const {
      37                 :          99 :     int count = 0;
      38         [ +  + ]:         165 :     for (const auto &child : children) {
      39         [ +  - ]:          66 :       count += 1 + child->descendantCount();
      40                 :             :     }
      41                 :          99 :     return count;
      42                 :             :   }
      43                 :             : 
      44                 :             :   // T-547: Check if any descendant has unseen mail.
      45                 :          13 :   bool hasUnseenDescendant() const {
      46         [ +  + ]:          16 :     for (const auto &child : children) {
      47         [ +  + ]:           9 :       if (!child->header.isSeen())
      48                 :           6 :         return true;
      49   [ +  -  +  + ]:           5 :       if (child->hasUnseenDescendant())
      50                 :           2 :         return true;
      51                 :             :     }
      52                 :           7 :     return false;
      53                 :             :   }
      54                 :             : 
      55                 :             :   // T-547: Count unseen descendants (not including self).
      56                 :         102 :   int unseenDescendantCount() const {
      57                 :         102 :     int count = 0;
      58         [ +  + ]:         169 :     for (const auto &child : children) {
      59         [ +  + ]:          67 :       if (!child->header.isSeen())
      60                 :          61 :         ++count;
      61         [ +  - ]:          67 :       count += child->unseenDescendantCount();
      62                 :             :     }
      63                 :         102 :     return count;
      64                 :             :   }
      65                 :             : };
      66                 :             : 
      67                 :             : // Builds a thread tree from a flat list of MailHeaders.
      68                 :             : // Uses a simplified JWZ algorithm: In-Reply-To based + subject fallback.
      69                 :             : class ThreadBuilder {
      70                 :             : public:
      71                 :             :   // Build thread tree from flat header list.
      72                 :             :   // The returned unique_ptrs own the root-level ThreadNodes (and their
      73                 :             :   // children). Each node holds its own copy of the MailHeader, so 'headers'
      74                 :             :   // may be modified or destroyed after this call.
      75                 :             :   static std::vector<std::unique_ptr<ThreadNode>> buildThreads(const QList<MailHeader> &headers);
      76                 :             : 
      77                 :             : private:
      78                 :             :   // Strip Re:/Fwd:/etc. prefixes for subject-based threading.
      79                 :             :   static QString normalizeSubject(const QString &subject);
      80                 :             : };
        

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