Add StatusBar information

Updated workers.py to hold "current" values.
Status bar is three widgets, status label, progressbar and load button.

Fixes: #8, #9

MainWindow.py

@@ -1,12 +1,10 @@
 from typing import Any, cast
 
 from PySide6.QtCore import (
-    QByteArray,
     QDate,
     QModelIndex,
     QPersistentModelIndex,
     QPoint,
-    QSettings,
     Qt,
     Signal,
     Slot,
@@ -15,19 +13,25 @@ from PySide6.QtGui import (
     QCloseEvent,
     QColor,
 )
-from PySide6.QtSql import QSqlTableModel
+from PySide6.QtSql import QSqlQuery, QSqlTableModel
 from PySide6.QtWidgets import (
     QAbstractItemView,
+    QHBoxLayout,
     QHeaderView,
+    QLabel,
     QMainWindow,
+    QProgressBar,
+    QPushButton,
+    QSizePolicy,
     QStyledItemDelegate,
     QStyleOptionViewItem,
+    QWidget,
 )
 
 from docketModel import docketModel
-from lib.utils import QStyleOptionViewItemInit, readGeometry, writeGeometry
+from lib.utils import QStyleOptionViewItemInit, query_error, readGeometry, writeGeometry
 from ui.MainWindow import Ui_MainWindow
-from workers import updateThread
+from workers import loadCases, updateThread
 
 
 class dateDelegate(QStyledItemDelegate):
@@ -115,7 +119,8 @@ class casesModel(QSqlTableModel):
 
 class MainWindow(QMainWindow, Ui_MainWindow):
     show_entries = Signal(int)
-
+    update_status = Signal()
+    
     loadThread = None
 
     def __init__(self) -> None:
@@ -169,6 +174,28 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         self.docketView.horizontalHeader().setSectionResizeMode(
             1, QHeaderView.ResizeMode.Stretch
         )
+
+        widget = QWidget()
+        layout = QHBoxLayout(widget)
+        self.status = QLabel("Status")
+        layout.addWidget(self.status)
+        layout.addStretch()
+        self.progress = QProgressBar()
+        self.progress.setRange(0,100)
+        self.progress.setValue(0)
+        self.progress.setMinimumWidth(150)
+        self.progress.setMaximumWidth(150)
+        self.progress.setSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Preferred)
+        layout.addWidget(self.progress)
+        self.loadButton = QPushButton()
+        self.loadButton.setObjectName("loadButton")
+        self.loadButton.setText("Load Cases")
+        layout.addWidget(self.loadButton)
+        self.statusbar.addWidget(widget,10)
+
+        self.loadButton.clicked.connect(self.loadCases)
+        self.update_status.connect(self.statusBarUpdate)
+        self.update_status.emit()
         return
 
     def closeEvent(self, event: QCloseEvent) -> None:
@@ -176,6 +203,48 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         super().closeEvent(event)
         return
 
+    @Slot()
+    def loadCases(self) -> None:
+        if self.loadThread is None:
+            self.loadThread = loadCases()
+            self.loadThread.caseLoaded.connect(self.progress.setValue)
+            self.loadThread.finished.connect(self.loadCasesDone)
+        self.loadButton.setEnabled(False)
+        self.loadThread.start()
+        return
+    @Slot()
+    def loadCasesDone(self) -> None:
+        self.loadButton.setEnabled(True)
+        self.update_status.emit()
+        return
+    
+    @Slot()
+    def statusBarUpdate(self) -> None:
+        if self.loadThread is None:
+            year = ''
+            max = 'unknown'
+        else:
+            year = self.loadThread.year
+            max = self.loadThread.number
+        query = QSqlQuery()
+        query.prepare("SELECT COUNT(*) AS number_active FROM cases WHERE active=1")
+        if not query.exec():
+            query_error(query)
+        if query.next():
+            active = query.value('number_active')
+        query.prepare("select SUBSTRING(docket_id,1,2) AS year, "
+                      "SUBSTRING(docket_id,3,1) AS type, "
+                      "MAX(CAST(SUBSTRING(docket_id,4) AS INTEGER)) AS number "
+                      "FROM cases "
+                      "GROUP BY year, type "
+                      "ORDER BY type, year, number"
+                      "LIMIT 2")
+        #if not query.exec():
+        #    query_error(query)
+        msg=f"Oldest: {year}, Active: {active}, Max. Case: {max}"
+        self.status.setText(msg)
+        return
+
     @Slot(QModelIndex)  # type: ignore
     def rowClicked(self, index: QModelIndex) -> None:
         if not index.isValid():