implement general data tab view

gui/data.py

@@ -0,0 +1,79 @@
+import mariadb
+
+
+class KontorDB:
+
+    def __init__(self, db_config):
+        self.db_conn = mariadb.connect(
+            host=db_config['mariadb']['host'],
+            port=db_config['mariadb']['port'],
+            user=db_config['mariadb']['user'],
+            password=db_config['mariadb']['password'],
+            database=db_config['mariadb']['database']
+        )
+
+    def get_table_id(self, table_name):
+        cursor = self.db_conn.cursor()
+        cursor.execute("SELECT id, created_date, last_modified_date FROM meta_data_table WHERE table_name=?", (table_name, ))
+        row = cursor.fetchone()
+        cursor.close()
+        return row[0]
+
+    def get_table_names(self) -> list:
+        tables_names = []
+        cursor = self.db_conn.cursor()
+        cursor.execute("SELECT id, table_name from meta_data_table")
+        rows = cursor.fetchall()
+        for (_, table_name) in rows:
+            tables_names.append(table_name)
+        cursor.close()
+        return tables_names
+
+    def get_column_meta_data(self, table_id):
+        cursor = self.db_conn.cursor()
+        meta_data = {}
+        cursor.execute("SELECT column_name, column_order, column_label FROM meta_data_column WHERE table_id=? AND is_shown is true ORDER bY column_order", (table_id, ))
+        rows = cursor.fetchall()
+        order = 0
+        for (column_name, column_order, column_label) in rows:
+            meta_data[order] = { 'column': column_name, 'label': column_label, 'order': column_order}
+            order += 1
+        cursor.close()
+        # print(f"retrieved {len(rows)} columns, set {len(meta_data)} headers")
+        return meta_data
+
+    def get_filters(self, table_id):
+        cursor = self.db_conn.cursor()
+        filters = {}
+        cursor.execute("SELECT column_name, filter_label from meta_data_column WHERE table_id=? AND show_filter is true", (table_id, ))
+        rows = cursor.fetchall()
+        for row in rows:
+            filters[row[0]] = {'label': row[1], 'widget': None}
+        cursor.close()
+        # print(f"retrieved {len(rows)} filters: {filters}")
+        return filters
+
+    def get_data(self, table_name: str, columns: dict, where_clause: str) -> list:
+        data = []
+        cursor = self.db_conn.cursor()
+        cursor.execute(self.get_statement(table_name, columns, where_clause))
+        rows = cursor.fetchall()
+        print(len(rows))
+        for row in rows:
+            # print(f"KontorDB.get_data: {row}")
+            data.append(list(row))
+        cursor.close()
+        print(f"KontorDB.getData: return {len(data)}")
+        return data
+
+    def get_statement(self, table: str, header: dict, where_clause):
+        columns = ""
+        for index, column in header.items():
+            if index > 0:
+                columns += ", "
+            columns += column['column']
+        if len(columns) == 0:
+            columns = "*"
+        statement = f"SELECT {columns} FROM {table} {where_clause}"
+        print(f"{statement=}")
+        return statement