Add context drawer

2 files changed, 180 insertions, 3 deletions

diff --git a/kodereviewer/models/__init__.py b/kodereviewer/models/__init__.py
index b9082d1..ad675bf 100644
--- a/kodereviewer/models/__init__.py
+++ b/kodereviewer/models/__init__.py
@@ -1,5 +1,5 @@
 from kodereviewer.models.comments import CommentModel
-from kodereviewer.models.file import FileModel
+from kodereviewer.models.file import FileModel, TreeFileModel
 from kodereviewer.models.line_model import LineModel
 from kodereviewer.models.project import ProjectModel
 from kodereviewer.models.pull_request import PullRequestModel
@@ -8,6 +8,7 @@ from kodereviewer.models.label import LabelModel
 __all__ = [
     'CommentModel',
     'FileModel',
+    'TreeFileModel',
     'LabelModel'
     'LineModel',
     'ProjectModel',
diff --git a/kodereviewer/models/file.py b/kodereviewer/models/file.py
index 246bd5b..4f0d139 100644
--- a/kodereviewer/models/file.py
+++ b/kodereviewer/models/file.py
@@ -1,8 +1,14 @@
+import logging
 from copy import copy
+from dataclasses import dataclass, field
 from enum import IntEnum, auto
-from typing import Any, Optional
+from pathlib import Path
+from typing import Any, Optional, Self
 
-from PySide6.QtCore import QAbstractListModel, QByteArray, QModelIndex, QObject, QPersistentModelIndex, QStandardPaths, QUrl, Qt, Signal, Slot, Property
+from PySide6.QtCore import (
+    QAbstractListModel, QAbstractItemModel, QByteArray, QModelIndex, QObject,
+    QPersistentModelIndex, QStandardPaths, QUrl, Qt, Signal, Slot, Property
+)
 from PySide6.QtQml import QmlElement
 
 from kodereviewer.project import Project
@@ -11,6 +17,176 @@ from kodereviewer.data import ChangedFile, Label, PullRequest
 QML_IMPORT_NAME = "org.deprecated.kodereviewer"
 QML_IMPORT_MAJOR_VERSION = 1
 
+logger = logging.getLogger(__name__)
+
+
+@dataclass
+class FileItem:
+    filename: str
+    parent: Self | None
+    children: list[Self] = field(default_factory=list)
+
+    def append(self, child: Self):
+        self.children.append(child)
+
+    def child(self, row: int) -> Self | None:
+        if row >= 0 and row < len(self.children):
+            return self.children[row]
+        return None
+
+    def row(self) -> int:
+        """Reports the item's location within it's parent."""
+        if self.parent is None:
+            return 0
+        for i, child in enumerate(self.parent.children):
+            if self is child:
+                return i
+
+        raise Exception('Should not happen!')
+
+    def column_count(self) -> int:
+        """Only the filename."""
+        return 1
+
+    def __str__(self) -> str:
+        return f'{self.filename} | {id(self.parent)} | {[x.filename for x in self.children]}'
+
+
+@QmlElement
+class TreeFileModel(QAbstractItemModel):
+
+    filenames: list[str] = field(default_factory=list)
+    dir_mapping: dict[str, FileItem] = field(default_factory=dict)
+    root_node: FileItem
+    _pull_request: Optional[PullRequest]
+
+    def __init__(self):
+        super().__init__()
+        self.root_node = FileItem('./', None)
+        self._pull_request = None
+
+    def load_files(self, filenames: list[str]):
+        logger.info(f'Loading {filenames}')
+        self.filenames = filenames
+        self.dir_mapping: dict[str, FileItem] = {}
+        root_node = FileItem('./', None)
+        for file in self.filenames:
+            p = Path(file)
+            directories = p.parts[:-1]
+            fname = p.name
+            current_path = Path('')
+            parent: FileItem = root_node
+            for dir in directories:
+                current_path = current_path / dir
+                if str(current_path) not in self.dir_mapping:
+                    logger.info(f'Creating {current_path}')
+                    self.dir_mapping[str(current_path)] = FileItem(
+                        str(current_path), parent
+                    )
+                    logger.info(f'Appending to {parent}')
+                    parent.append(self.dir_mapping[str(current_path)])
+
+                parent = self.dir_mapping[str(current_path)]
+            file_item = FileItem(fname, parent)
+            parent.append(file_item)
+        self.root_node = root_node
+        logger.info(self.root_node)
+
+    pullRequestChanged = Signal()
+
+    def get_pull_request(self) -> Optional[PullRequest]:
+        return self._pull_request
+
+    def set_pull_request(self, pull_request: Optional[PullRequest]) -> None:
+        if pull_request is None:
+            return
+
+        if self._pull_request is not None and self._pull_request == pull_request:
+            return
+
+        self.beginResetModel()
+        self._pull_request = pull_request
+        self._pull_request.filesLoaded.connect(self._reset_model)
+        self.endResetModel()
+        self.pullRequestChanged.emit()
+
+    pullRequest = Property(PullRequest, fget=get_pull_request, fset=set_pull_request,
+                           notify=pullRequestChanged)
+
+    def _reset_model(self) -> None:
+        logger.info('reseting model')
+        self.beginResetModel()
+        filenames = [f.filename for f in self._pull_request.files]
+        self.load_files(filenames)
+        self.endResetModel()
+
+    def index(self, row: int, column: int,
+              index: QModelIndex = QModelIndex()) -> QModelIndex:
+        """Returns the index of the item in the model specified by the given row, column and parent index."""
+        if not self.hasIndex(row, column, index):
+            return QModelIndex()
+        item: FileItem
+        if not index.isValid():
+            item = self.root_node
+        else:
+            item = index.internalPointer()
+
+        if item.child(row):
+            return self.createIndex(row, column, item.child(row))
+        return QModelIndex()
+
+    def parent(self, index: QModelIndex) -> QModelIndex:
+        """Returns the parent of the model item with the given index
+
+        If the item has no parent, an invalid QModelIndex is returned.
+        """
+        if not index.isValid():
+            return QModelIndex()
+
+        item: FileItem = index.internalPointer()
+        parent: FileItem = item.parent
+        if parent == self.root_node:
+            return QModelIndex()
+        return self.createIndex(parent.row(), 0, parent)
+
+    def rowCount(self, index: QModelIndex = QModelIndex()) -> int:
+        """Returns the number of rows under the given parent
+
+        When the parent is valid it means that rowCount is returning
+        the number of children of parent. """
+
+        parent: FileItem
+        if index.isValid():
+            parent = index.internalPointer()
+        else:
+            parent = self.root_node
+
+        return len(parent.children)
+
+    def columnCount(self, parent: QModelIndex = QModelIndex()) -> int:
+        return 1
+
+    FilenameRole = Qt.ItemDataRole.UserRole + 1
+
+    def data(self, index: QModelIndex, role: int) -> Any:
+        if not index.isValid():
+            return ''
+        filename = index.internalPointer().filename
+        name = Path(filename).name
+        logger.info(index)
+        logger.info(f'Role: {role} | {self.FilenameRole}')
+        if role == Qt.ItemDataRole.DisplayRole:
+            return name
+        if role == self.FilenameRole:
+            logger.info(name)
+            return name
+        return None
+
+    def roleNames(self) -> dict[int, QByteArray]:
+        return {
+            self.FilenameRole: QByteArray(b'filename'),
+        }
+
 
 @QmlElement
 class FileModel(QAbstractListModel):