X-Git-Url: https://plomlompom.com/repos/%7B%7B%20web_path%20%7D%7D/decks/%7B%7Bdeck_id%7D%7D/cards/%7B%7Bcard_id%7D%7D/form?a=blobdiff_plain;f=plomtask%2Fdb.py;h=dfb388b7ec6ed9317f19a788336025a96e4c745e;hb=c5fab0b28785bb8f3a8e2b8e455fd679cfe83d25;hp=929a733cc381a6d6d7a2e24feda04a5a014081a7;hpb=8ae8877e3e2588db76285e7e3ddfb8c7b9948a96;p=plomtask

diff --git a/plomtask/db.py b/plomtask/db.py
index 929a733..dfb388b 100644
--- a/plomtask/db.py
+++ b/plomtask/db.py
@@ -2,7 +2,7 @@
 from os.path import isfile
 from difflib import Differ
 from sqlite3 import connect as sql_connect, Cursor
-from typing import Any
+from typing import Any, Dict
 from plomtask.exceptions import HandledException
 
 PATH_DB_SCHEMA = 'scripts/init.sql'
@@ -23,7 +23,7 @@ class DatabaseFile:  # pylint: disable=too-few-public-methods
         self._check()
 
     def _check(self) -> None:
-        """Check file exists and is of proper schema."""
+        """Check file exists, and is of proper schema."""
         self.exists = isfile(self.path)
         if self.exists:
             self._validate_schema()
@@ -49,6 +49,11 @@ class DatabaseConnection:
     def __init__(self, db_file: DatabaseFile) -> None:
         self.file = db_file
         self.conn = sql_connect(self.file.path)
+        self.cached_todos: Dict[int, Any] = {}
+        self.cached_days: Dict[str, Any] = {}
+        self.cached_process_steps: Dict[int, Any] = {}
+        self.cached_processes: Dict[int, Any] = {}
+        self.cached_conditions: Dict[int, Any] = {}
 
     def commit(self) -> None:
         """Commit SQL transaction."""
@@ -61,3 +66,31 @@ class DatabaseConnection:
     def close(self) -> None:
         """Close DB connection."""
         self.conn.close()
+
+
+class BaseModel:
+    """Template for most of the models we use/derive from the DB."""
+    table_name = ''
+    to_save: list[str] = []
+    id_: None | int | str
+
+    def set_int_id(self, id_: int | None) -> None:
+        """Set id_ if >= 1 or None, else fail."""
+        if (id_ is not None) and id_ < 1:
+            msg = f'illegal {self.__class__.__name__} ID, must be >=1: {id_}'
+            raise HandledException(msg)
+        self.id_ = id_
+
+    def save_core(self, db_conn: DatabaseConnection,
+                  update_with_lastrowid: bool = True) -> None:
+        """Write bare-bones self (sans connected items), ensuring self.id_."""
+        q_marks = ','.join(['?'] * (len(self.to_save) + 1))
+        values = tuple([self.id_] + [getattr(self, key)
+                                     for key in self.to_save])
+        table_name = self.table_name
+        cursor = db_conn.exec(f'REPLACE INTO {table_name} VALUES ({q_marks})',
+                              values)
+        if update_with_lastrowid:
+            self.id_ = cursor.lastrowid
+        cache = getattr(db_conn, f'cached_{table_name}')
+        cache[self.id_] = self